[PATCH 01/11] support: Add xmkfifo

[PATCH 01/11] support: Add xmkfifo

[Adhemerval Zanella]

Wrapper support mkfifo.
---
 support/Makefile  |  1 +
 support/xmkfifo.c | 29 +++++++++++++++++++++++++++++
 support/xunistd.h |  1 +
 3 files changed, 31 insertions(+)
 create mode 100644 support/xmkfifo.c

diff --git a/support/Makefile b/support/Makefile
index 900e17f94f..cbf2efdf5f 100644
--- a/support/Makefile
+++ b/support/Makefile
@@ -114,6 +114,7 @@ libsupport-routines = \
   xmemstream \
   xmkdir \
   xmkdirp \
+  xmkfifo \
   xmmap \
   xmprotect \
   xmunmap \
diff --git a/support/xmkfifo.c b/support/xmkfifo.c
new file mode 100644
index 0000000000..d9f3e9fde7
--- /dev/null
+++ b/support/xmkfifo.c
@@ -0,0 +1,29 @@
+/* mkfifo with error checking.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <support/check.h>
+#include <support/xunistd.h>
+#include <sys/stat.h>
+
+void
+xmkfifo (const char *pathname, mode_t mode)
+{
+  int r = mkfifo (pathname, mode);
+  if (r < 0)
+    FAIL_EXIT1 ("mkfifo (%s, %d): %m", pathname, mode);
+}
diff --git a/support/xunistd.h b/support/xunistd.h
index c642588c29..86fee87b7a 100644
--- a/support/xunistd.h
+++ b/support/xunistd.h
@@ -48,6 +48,7 @@ void xsymlink (const char *target, const char *linkpath);
 void xchdir (const char *path);
 void xfchmod (int fd, mode_t mode);
 void xchmod (const char *pathname, mode_t mode);
+void xmkfifo (const char *pathtname, mode_t mode);
 
 /* Equivalent of "mkdir -p".  */
 void xmkdirp (const char *, mode_t);
-- 
2.27.0

[PATCH 02/11] misc: Add syslog test

[Adhemerval Zanella]

The test cover:

  - All possible priorities and facilities through TCP and UDP.
  - Same syslog tests for vsyslog.
  - Some openlog/syslog/close combinations.
  - openlog with LOG_CONS, LOG_PERROR, and LOG_PID.

Internally is done with a test-container where the main process mimics
the syslog server interface.

The test does not cover multithread and async-signal usage.

Checked on x86_64-linux-gnu.
---
 misc/Makefile     |   2 +
 misc/tst-syslog.c | 483 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 485 insertions(+)
 create mode 100644 misc/tst-syslog.c

diff --git a/misc/Makefile b/misc/Makefile
index 38dad737f2..63812124f2 100644
--- a/misc/Makefile
+++ b/misc/Makefile
@@ -107,6 +107,8 @@ tests-special += $(objpfx)tst-error1-mem.out \
   $(objpfx)tst-allocate_once-mem.out
 endif
 
+tests-container := tst-syslog
+
 CFLAGS-select.c += -fexceptions -fasynchronous-unwind-tables
 CFLAGS-tsearch.c += $(uses-callbacks)
 CFLAGS-lsearch.c += $(uses-callbacks)
diff --git a/misc/tst-syslog.c b/misc/tst-syslog.c
new file mode 100644
index 0000000000..ed8c528db4
--- /dev/null
+++ b/misc/tst-syslog.c
@@ -0,0 +1,483 @@
+/* Basic tests for syslog interfaces.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <array_length.h>
+#include <fcntl.h>
+#include <paths.h>
+#include <netinet/in.h>
+#include <support/capture_subprocess.h>
+#include <support/check.h>
+#include <support/temp_file.h>
+#include <support/xstdio.h>
+#include <support/xsocket.h>
+#include <support/xunistd.h>
+#include <stdbool.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include <sys/un.h>
+
+static const int facilities[] =
+  {
+    LOG_KERN,
+    LOG_USER,
+    LOG_MAIL,
+    LOG_DAEMON,
+    LOG_AUTH,
+    LOG_SYSLOG,
+    LOG_LPR,
+    LOG_NEWS,
+    LOG_UUCP,
+    LOG_CRON,
+    LOG_AUTHPRIV,
+    LOG_FTP,
+    LOG_LOCAL0,
+    LOG_LOCAL1,
+    LOG_LOCAL2,
+    LOG_LOCAL3,
+    LOG_LOCAL4,
+    LOG_LOCAL5,
+    LOG_LOCAL6,
+    LOG_LOCAL7,
+  };
+
+static const int priorities[] =
+  {
+    LOG_EMERG,
+    LOG_ALERT,
+    LOG_CRIT,
+    LOG_ERR,
+    LOG_WARNING,
+    LOG_NOTICE,
+    LOG_INFO,
+    LOG_DEBUG
+  };
+
+enum
+  {
+    ident_length = 64,
+    msg_length = 64
+  };
+
+#define SYSLOG_MSG_BASE "syslog_message"
+#define OPENLOG_IDENT   "openlog_ident"
+
+struct msg_t
+  {
+    int priority;
+    int facility;
+    char ident[ident_length];
+    char msg[msg_length];
+    pid_t pid;
+  };
+
+static void
+call_vsyslog (int priority, const char *format, ...)
+{
+  va_list ap;
+  va_start (ap, format);
+  vsyslog (priority, format, ap);
+  va_end (ap);
+}
+
+static void
+send_vsyslog (int options)
+{
+  for (size_t i = 0; i < array_length (facilities); i++)
+    {
+      for (size_t j = 0; j < array_length (priorities); j++)
+        {
+          int facility = facilities[i];
+          int priority = priorities[j];
+          call_vsyslog (facility | priority, "%s %d %d", SYSLOG_MSG_BASE,
+                        facility, priority);
+        }
+    }
+}
+
+static void
+send_syslog (int options)
+{
+  for (size_t i = 0; i < array_length (facilities); i++)
+    {
+      for (size_t j = 0; j < array_length (priorities); j++)
+        {
+          int facility = facilities[i];
+          int priority = priorities[j];
+          syslog (facility | priority, "%s %d %d", SYSLOG_MSG_BASE, facility,
+                  priority);
+        }
+    }
+}
+
+static bool
+check_syslog_message (const struct msg_t *msg, int msgnum, int options,
+                      pid_t pid)
+{
+  if (msgnum == array_length (facilities) * array_length (priorities) - 1)
+    return false;
+
+  int i = msgnum / array_length (priorities);
+  int j = msgnum % array_length (priorities);
+
+  int expected_facility = facilities[i];
+  /* With no preceding openlog, syslog default to LOG_USER.  */
+  if (expected_facility == LOG_KERN)
+      expected_facility = LOG_USER;
+  int expected_priority = priorities[j];
+
+  TEST_COMPARE (msg->facility, expected_facility);
+  TEST_COMPARE (msg->priority, expected_priority);
+
+  return true;
+}
+
+static void
+send_openlog (int options)
+{
+  /* Define a non-default IDENT and a not default facility.  */
+  openlog (OPENLOG_IDENT, options, LOG_LOCAL0);
+  for (size_t j = 0; j < array_length (priorities); j++)
+    {
+      int priority = priorities[j];
+      syslog (priority, "%s %d %d", SYSLOG_MSG_BASE, LOG_LOCAL0, priority);
+    }
+  closelog ();
+
+  /* Back to the default IDENT with a non default facility.  */
+  openlog (NULL, 0, LOG_LOCAL6);
+  for (size_t j = 0; j < array_length (priorities); j++)
+    {
+      int priority = priorities[j];
+      syslog (LOG_LOCAL7 | priority, "%s %d %d", SYSLOG_MSG_BASE, LOG_LOCAL7,
+        priority);
+    }
+  closelog ();
+
+  /* LOG_KERN does not change the internal default facility.  */
+  openlog (NULL, 0, LOG_KERN);
+  for (size_t j = 0; j < array_length (priorities); j++)
+    {
+      int priority = priorities[j];
+      syslog (priority, "%s %d %d", SYSLOG_MSG_BASE, LOG_KERN, priority);
+    }
+  closelog ();
+}
+
+static bool
+check_openlog_message (const struct msg_t *msg, int msgnum,
+                       int options, pid_t pid)
+{
+  if (msgnum == 3 * array_length (priorities) - 1)
+    return false;
+
+  int expected_priority = priorities[msgnum % array_length (priorities)];
+  TEST_COMPARE (msg->priority, expected_priority);
+
+  char expected_ident[ident_length];
+  snprintf (expected_ident, sizeof (expected_ident), "%s%s%.0d%s:",
+            OPENLOG_IDENT,
+            options & LOG_PID ? "[" : "",
+            options & LOG_PID ? pid : 0,
+            options & LOG_PID ? "]" : "");
+
+  if (msgnum < array_length (priorities))
+    {
+      if (options & LOG_PID)
+        TEST_COMPARE (msg->pid, pid);
+      TEST_COMPARE_STRING (msg->ident, expected_ident);
+      TEST_COMPARE (msg->facility, LOG_LOCAL0);
+    }
+  else if (msgnum < 2 * array_length (priorities))
+    {
+      TEST_COMPARE (msg->facility, LOG_LOCAL7);
+    }
+  /* Since openlog (LOG_KERN) does not change the facility, we need to check
+     against the previous valid openlog.  */
+  else if (msgnum < 3 * array_length (priorities))
+    {
+      TEST_COMPARE (msg->facility, LOG_LOCAL6);
+    }
+
+  return true;
+}
+
+static struct msg_t
+parse_syslog_msg (const char *msg)
+{
+  struct msg_t r = { .pid = -1 };
+  int number;
+
+  /* The message in the form:
+     <179>Apr  8 14:51:19 tst-syslog: syslog message 176 3  */
+  int n = sscanf (msg, "<%3d>%*s %*d %*d:%*d:%*d %32s %64s %*d %*d",
+                  &number, r.ident, r.msg);
+  TEST_COMPARE (n, 3);
+
+  r.facility = number & LOG_FACMASK;
+  r.priority = number & LOG_PRIMASK;
+
+  char *pid_start = strchr (r.ident, '[');
+  if (pid_start != NULL)
+    {
+       char *pid_end = strchr (r.ident, ']');
+       if (pid_end != NULL)
+         r.pid = strtoul (pid_start + 1, NULL, 10);
+    }
+
+  return r;
+}
+
+static struct msg_t
+parse_syslog_console (const char *msg)
+{
+  int priority;
+  int facility;
+  struct msg_t r;
+
+  /* The message in the form:
+     openlog_ident: syslog_message 128 0  */
+  int n = sscanf (msg, "%32s %64s %d %d",
+      r.ident, r.msg, &facility, &priority);
+  TEST_COMPARE (n, 4);
+
+  r.facility = facility;
+  r.priority = priority;
+
+  return r;
+}
+
+static void
+check_syslog_udp (void (*syslog_send)(int), int options,
+                  bool (*syslog_check)(const struct msg_t *, int, int,
+                                       pid_t))
+{
+  struct sockaddr_un addr =
+    {
+      .sun_family = AF_UNIX,
+      .sun_path = _PATH_LOG
+    };
+
+  socklen_t addrlen = sizeof (addr);
+  int server_udp = xsocket (AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC, 0);
+  xbind (server_udp, (struct sockaddr *) &addr, addrlen);
+
+  pid_t sender_pid = xfork ();
+  if (sender_pid == 0)
+    {
+      syslog_send (options);
+      _exit (0);
+    }
+
+  int msgnum = 0;
+  while (1)
+    {
+      char buf[512];
+      size_t l = xrecvfrom (server_udp, buf, sizeof (buf), 0,
+                            (struct sockaddr *) &addr, &addrlen);
+      buf[l] = '\0';
+
+      struct msg_t msg = parse_syslog_msg (buf);
+      if (!syslog_check (&msg, msgnum++, options, sender_pid))
+        break;
+     }
+
+  xclose (server_udp);
+
+  int status;
+  xwaitpid (sender_pid, &status, 0);
+  TEST_COMPARE (status, 0);
+
+  unlink (_PATH_LOG);
+}
+
+static void
+check_syslog_tcp (void (*syslog_send)(int), int options,
+                  bool (*syslog_check)(const struct msg_t *, int, int,
+                                       pid_t))
+{
+  struct sockaddr_un addr =
+    {
+      .sun_family = AF_UNIX,
+      .sun_path = _PATH_LOG
+    };
+  socklen_t addrlen = sizeof (addr);
+
+  int server_tcp = xsocket (AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
+  xbind (server_tcp, (struct sockaddr *) &addr, addrlen);
+  xlisten (server_tcp, 5);
+
+  pid_t sender_pid = xfork ();
+  if (sender_pid == 0)
+    {
+      syslog_send (options);
+      _exit (0);
+    }
+
+  int client_tcp = xaccept (server_tcp, NULL, NULL);
+
+  char buf[512], *rb = buf;
+  size_t rbl = sizeof (buf);
+  size_t prl = 0;  /* Track the size of the partial record.  */
+  int msgnum = 0;
+
+  while (1)
+    {
+      size_t rl = xrecvfrom (client_tcp, rb, rbl - prl, 0, NULL, NULL);
+      if (rl == 0)
+        break;
+
+      /* Iterate over the buffer to find and check the record.  */
+      size_t l = rl + prl;
+      char *b = buf;
+      while (1)
+	{
+          /* With TCP each record ends with a '\0'.  */
+          char *e = memchr (b, '\0', l);
+          if (e != NULL)
+            {
+              struct msg_t msg = parse_syslog_msg (b);
+              if (!syslog_check (&msg, msgnum++, options, sender_pid))
+                break;
+
+	      /* Advance to the next record.  */
+	      ptrdiff_t diff = e + 1 - b;
+	      b += diff;
+	      l -= diff;
+	    }
+	  else
+	    {
+              /* Move the partial record to the start of the buffer.  */
+	      memmove (buf, b, l);
+	      rb = buf + l;
+	      prl = l;
+	      break;
+            }
+        }
+    }
+
+  xclose (client_tcp);
+  xclose (server_tcp);
+
+  int status;
+  xwaitpid (sender_pid, &status, 0);
+  TEST_COMPARE (status, 0);
+
+  unlink (_PATH_LOG);
+}
+
+static void
+check_syslog_console_read (FILE *fp)
+{
+  char buf[512];
+  int msgnum = 0;
+  while (fgets (buf, sizeof (buf), fp) != NULL)
+    {
+      struct msg_t msg = parse_syslog_console (buf);
+      TEST_COMPARE_STRING (msg.ident, OPENLOG_IDENT ":");
+      TEST_COMPARE (msg.priority, priorities[msgnum]);
+      TEST_COMPARE (msg.facility, LOG_LOCAL0);
+
+      if (++msgnum == array_length (priorities))
+        break;
+    }
+}
+
+static void
+check_syslog_console (void)
+{
+  xmkfifo (_PATH_CONSOLE, 0666);
+
+  pid_t sender_pid = xfork ();
+  if (sender_pid == 0)
+    {
+      send_openlog (LOG_CONS);
+      _exit (0);
+    }
+
+  {
+    FILE *fp = xfopen (_PATH_CONSOLE, "r+");
+    check_syslog_console_read (fp);
+    xfclose (fp);
+  }
+
+  int status;
+  xwaitpid (sender_pid, &status, 0);
+  TEST_COMPARE (status, 0);
+
+  unlink (_PATH_CONSOLE);
+}
+
+static void
+send_openlog_callback (void *clousure)
+{
+  int options = *(int *) clousure;
+  send_openlog (options);
+}
+
+static void
+check_syslog_perror (void)
+{
+  struct support_capture_subprocess result;
+  result = support_capture_subprocess (send_openlog_callback,
+                                       &(int){LOG_PERROR});
+
+  FILE *mfp = fmemopen (result.err.buffer, result.err.length, "r");
+  if (mfp == NULL)
+    FAIL_EXIT1 ("fmemopen: %m");
+  check_syslog_console_read (mfp);
+  xfclose (mfp);
+
+  support_capture_subprocess_check (&result, "tst-openlog-child", 0,
+                                    sc_allow_stderr);
+  support_capture_subprocess_free (&result);
+}
+
+static int
+do_test (void)
+{
+  add_temp_file (_PATH_LOG);
+  add_temp_file (_PATH_CONSOLE);
+
+  /* Send every combination of facility/priority over UDP and TCP.  */
+  check_syslog_udp (send_syslog, 0, check_syslog_message);
+  check_syslog_tcp (send_syslog, 0, check_syslog_message);
+
+  /* Also check vsyslog.  */
+  check_syslog_udp (send_vsyslog, 0, check_syslog_message);
+  check_syslog_tcp (send_vsyslog, 0, check_syslog_message);
+
+  /* Run some openlog/syslog/closelog combinations.  */
+  check_syslog_udp (send_openlog, 0, check_openlog_message);
+  check_syslog_tcp (send_openlog, 0, check_openlog_message);
+
+  /* Check the LOG_PID option.  */
+  check_syslog_udp (send_openlog, LOG_PID, check_openlog_message);
+  check_syslog_tcp (send_openlog, LOG_PID, check_openlog_message);
+
+  /* Check the LOG_CONS option.  */
+  check_syslog_console ();
+
+  /* Check the LOG_PERROR option.  */
+  check_syslog_perror ();
+
+  return 0;
+}
+
+#include <support/test-driver.c>
-- 
2.27.0

[PATCH 03/11] misc: syslog: Fix indentation and style

[Adhemerval Zanella]

No semantic changes.
---
 misc/syslog.c | 510 +++++++++++++++++++++++++-------------------------
 1 file changed, 253 insertions(+), 257 deletions(-)

diff --git a/misc/syslog.c b/misc/syslog.c
index 2cc63ef287..2ec986811d 100644
--- a/misc/syslog.c
+++ b/misc/syslog.c
@@ -27,10 +27,6 @@
  * SUCH DAMAGE.
  */
 
-#if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)syslog.c	8.4 (Berkeley) 3/18/94";
-#endif /* LIBC_SCCS and not lint */
-
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/syslog.h>
@@ -60,20 +56,19 @@ static char sccsid[] = "@(#)syslog.c	8.4 (Berkeley) 3/18/94";
 
 #define ftell(s) _IO_ftell (s)
 
-static int	LogType = SOCK_DGRAM;	/* type of socket connection */
-static int	LogFile = -1;		/* fd for log */
-static int	connected;		/* have done connect */
-static int	LogStat;		/* status bits, set by openlog() */
-static const char *LogTag;		/* string to tag the entry with */
-static int	LogFacility = LOG_USER;	/* default facility code */
-static int	LogMask = 0xff;		/* mask of priorities to be logged */
-extern char	*__progname;		/* Program name, from crt0. */
+static int LogType = SOCK_DGRAM;        /* Type of socket connection  */
+static int LogFile = -1;                /* fd for log  */
+static int connected;                   /* Have done connect */
+static int LogStat;                     /* Status bits, set by openlog()  */
+static const char *LogTag;              /* String to tag the entry with  */
+static int LogFacility = LOG_USER;      /* Default facility code  */
+static int LogMask = 0xff;              /* Mask of priorities to be logged  */
+extern char *__progname;                /* Program name, from crt0.  */
 
 /* Define the lock.  */
 __libc_lock_define_initialized (static, syslog_lock)
-
-static void openlog_internal(const char *, int, int);
-static void closelog_internal(void);
+static void openlog_internal (const char *, int, int);
+static void closelog_internal (void);
 #ifndef NO_SIGPIPE
 static void sigpipe_handler (int);
 #endif
@@ -88,8 +83,7 @@ struct cleanup_arg
   struct sigaction *oldaction;
 };
 
-static void
-cancel_handler (void *ptr)
+static void cancel_handler (void *ptr)
 {
   /* Restore the old signal handler.  */
   struct cleanup_arg *clarg = (struct cleanup_arg *) ptr;
@@ -98,7 +92,7 @@ cancel_handler (void *ptr)
     {
 #ifndef NO_SIGPIPE
       if (clarg->oldaction != NULL)
-	__sigaction (SIGPIPE, clarg->oldaction, NULL);
+        __sigaction (SIGPIPE, clarg->oldaction, NULL);
 #endif
 
       /* Free the memstream buffer,  */
@@ -112,276 +106,278 @@ cancel_handler (void *ptr)
 
 /*
  * syslog, vsyslog --
- *	print message on log file; output is intended for syslogd(8).
+ *     print message on log file; output is intended for syslogd(8).
  */
 void
-__syslog(int pri, const char *fmt, ...)
+__syslog (int pri, const char *fmt, ...)
 {
-	va_list ap;
+  va_list ap;
 
-	va_start(ap, fmt);
-	__vsyslog_internal(pri, fmt, ap, 0);
-	va_end(ap);
+  va_start (ap, fmt);
+  __vsyslog_internal (pri, fmt, ap, 0);
+  va_end (ap);
 }
 ldbl_hidden_def (__syslog, syslog)
 ldbl_strong_alias (__syslog, syslog)
 
 void
-__vsyslog(int pri, const char *fmt, va_list ap)
+__vsyslog (int pri, const char *fmt, va_list ap)
 {
-	__vsyslog_internal(pri, fmt, ap, 0);
+  __vsyslog_internal (pri, fmt, ap, 0);
 }
 ldbl_weak_alias (__vsyslog, vsyslog)
 
 void
-__syslog_chk(int pri, int flag, const char *fmt, ...)
+__syslog_chk (int pri, int flag, const char *fmt, ...)
 {
-	va_list ap;
+  va_list ap;
 
-	va_start(ap, fmt);
-	__vsyslog_internal(pri, fmt, ap, (flag > 0) ? PRINTF_FORTIFY : 0);
-	va_end(ap);
+  va_start (ap, fmt);
+  __vsyslog_internal (pri, fmt, ap, (flag > 0) ? PRINTF_FORTIFY : 0);
+  va_end (ap);
 }
 
 void
-__vsyslog_chk(int pri, int flag, const char *fmt, va_list ap)
+__vsyslog_chk (int pri, int flag, const char *fmt, va_list ap)
 {
-	__vsyslog_internal(pri, fmt, ap, (flag > 0) ? PRINTF_FORTIFY : 0);
+  __vsyslog_internal (pri, fmt, ap, (flag > 0) ? PRINTF_FORTIFY : 0);
 }
 
 void
-__vsyslog_internal(int pri, const char *fmt, va_list ap,
-		   unsigned int mode_flags)
+__vsyslog_internal (int pri, const char *fmt, va_list ap,
+                    unsigned int mode_flags)
 {
-	struct tm now_tm;
-	time_t now;
-	int fd;
-	FILE *f;
-	char *buf = 0;
-	size_t bufsize = 0;
-	size_t msgoff;
+  struct tm now_tm;
+  time_t now;
+  int fd;
+  FILE *f;
+  char *buf = 0;
+  size_t bufsize = 0;
+  size_t msgoff;
 #ifndef NO_SIGPIPE
- 	struct sigaction action, oldaction;
- 	int sigpipe;
+  struct sigaction action, oldaction;
+  int sigpipe;
 #endif
-	int saved_errno = errno;
-	char failbuf[3 * sizeof (pid_t) + sizeof "out of memory []"];
-
-#define	INTERNALLOG	LOG_ERR|LOG_CONS|LOG_PERROR|LOG_PID
-	/* Check for invalid bits. */
-	if (pri & ~(LOG_PRIMASK|LOG_FACMASK)) {
-		syslog(INTERNALLOG,
-		    "syslog: unknown facility/priority: %x", pri);
-		pri &= LOG_PRIMASK|LOG_FACMASK;
-	}
-
-	/* Prepare for multiple users.  We have to take care: most
-	   syscalls we are using are cancellation points.  */
-	struct cleanup_arg clarg;
-	clarg.buf = NULL;
-	clarg.oldaction = NULL;
-	__libc_cleanup_push (cancel_handler, &clarg);
-	__libc_lock_lock (syslog_lock);
-
-	/* Check priority against setlogmask values. */
-	if ((LOG_MASK (LOG_PRI (pri)) & LogMask) == 0)
-		goto out;
-
-	/* Set default facility if none specified. */
-	if ((pri & LOG_FACMASK) == 0)
-		pri |= LogFacility;
-
-	/* Build the message in a memory-buffer stream.  */
-	f = __open_memstream (&buf, &bufsize);
-	if (f == NULL)
-	  {
-	    /* We cannot get a stream.  There is not much we can do but
-	       emitting an error messages.  */
-	    char numbuf[3 * sizeof (pid_t)];
-	    char *nump;
-	    char *endp = __stpcpy (failbuf, "out of memory [");
-	    pid_t pid = __getpid ();
-
-	    nump = numbuf + sizeof (numbuf);
-	    /* The PID can never be zero.  */
-	    do
-	      *--nump = '0' + pid % 10;
-	    while ((pid /= 10) != 0);
-
-	    endp = __mempcpy (endp, nump, (numbuf + sizeof (numbuf)) - nump);
-	    *endp++ = ']';
-	    *endp = '\0';
-	    buf = failbuf;
-	    bufsize = endp - failbuf;
-	    msgoff = 0;
-	  }
-	else
-	  {
-	    __fsetlocking (f, FSETLOCKING_BYCALLER);
-	    fprintf (f, "<%d>", pri);
-	    now = time_now ();
-	    f->_IO_write_ptr += __strftime_l (f->_IO_write_ptr,
-					      f->_IO_write_end
-					      - f->_IO_write_ptr,
-					      "%h %e %T ",
-					      __localtime_r (&now, &now_tm),
-					      _nl_C_locobj_ptr);
-	    msgoff = ftell (f);
-	    if (LogTag == NULL)
-	      LogTag = __progname;
-	    if (LogTag != NULL)
-	      __fputs_unlocked (LogTag, f);
-	    if (LogStat & LOG_PID)
-	      fprintf (f, "[%d]", (int) __getpid ());
-	    if (LogTag != NULL)
-	      {
-		__putc_unlocked (':', f);
-		__putc_unlocked (' ', f);
-	      }
-
-	    /* Restore errno for %m format.  */
-	    __set_errno (saved_errno);
-
-	    /* We have the header.  Print the user's format into the
-	       buffer.  */
-	    __vfprintf_internal (f, fmt, ap, mode_flags);
-
-	    /* Close the memory stream; this will finalize the data
-	       into a malloc'd buffer in BUF.  */
-	    fclose (f);
-
-	    /* Tell the cancellation handler to free this buffer.  */
-	    clarg.buf = buf;
-	  }
-
-	/* Output to stderr if requested. */
-	if (LogStat & LOG_PERROR) {
-		struct iovec iov[2];
-		struct iovec *v = iov;
-
-		v->iov_base = buf + msgoff;
-		v->iov_len = bufsize - msgoff;
-		/* Append a newline if necessary.  */
-		if (buf[bufsize - 1] != '\n')
-		  {
-		    ++v;
-		    v->iov_base = (char *) "\n";
-		    v->iov_len = 1;
-		  }
-
-		/* writev is a cancellation point.  */
-		(void)__writev(STDERR_FILENO, iov, v - iov + 1);
-	}
+  int saved_errno = errno;
+  char failbuf[3 * sizeof (pid_t) + sizeof "out of memory []"];
+
+#define INTERNALLOG LOG_ERR|LOG_CONS|LOG_PERROR|LOG_PID
+  /* Check for invalid bits.  */
+  if (pri & ~(LOG_PRIMASK | LOG_FACMASK))
+    {
+      syslog (INTERNALLOG, "syslog: unknown facility/priority: %x", pri);
+      pri &= LOG_PRIMASK | LOG_FACMASK;
+    }
+
+  /* Prepare for multiple users.  We have to take care: most
+     syscalls we are using are cancellation points.  */
+  struct cleanup_arg clarg;
+  clarg.buf = NULL;
+  clarg.oldaction = NULL;
+  __libc_cleanup_push (cancel_handler, &clarg);
+  __libc_lock_lock (syslog_lock);
+
+  /* Check priority against setlogmask values.  */
+  if ((LOG_MASK (LOG_PRI (pri)) & LogMask) == 0)
+    goto out;
+
+  /* Set default facility if none specified.  */
+  if ((pri & LOG_FACMASK) == 0)
+    pri |= LogFacility;
+
+  /* Build the message in a memory-buffer stream.  */
+  f = __open_memstream (&buf, &bufsize);
+  if (f == NULL)
+    {
+      /* We cannot get a stream.  There is not much we can do but
+         emitting an error messages.  */
+      char numbuf[3 * sizeof (pid_t)];
+      char *nump;
+      char *endp = __stpcpy (failbuf, "out of memory [");
+      pid_t pid = __getpid ();
+
+      nump = numbuf + sizeof (numbuf);
+      /* The PID can never be zero.  */
+      do
+        *--nump = '0' + pid % 10;
+      while ((pid /= 10) != 0);
+
+      endp = __mempcpy (endp, nump, (numbuf + sizeof (numbuf)) - nump);
+      *endp++ = ']';
+      *endp = '\0';
+      buf = failbuf;
+      bufsize = endp - failbuf;
+      msgoff = 0;
+    }
+  else
+    {
+      __fsetlocking (f, FSETLOCKING_BYCALLER);
+      fprintf (f, "<%d>", pri);
+      now = time_now ();
+      f->_IO_write_ptr += __strftime_l (f->_IO_write_ptr,
+                    f->_IO_write_end
+                    - f->_IO_write_ptr,
+                    "%h %e %T ",
+                    __localtime_r (&now, &now_tm),
+                    _nl_C_locobj_ptr);
+      msgoff = ftell (f);
+      if (LogTag == NULL)
+        LogTag = __progname;
+      if (LogTag != NULL)
+        __fputs_unlocked (LogTag, f);
+      if (LogStat & LOG_PID)
+        fprintf (f, "[%d]", (int) __getpid ());
+      if (LogTag != NULL)
+        {
+          __putc_unlocked (':', f);
+          __putc_unlocked (' ', f);
+        }
+
+      /* Restore errno for %m format.  */
+      __set_errno (saved_errno);
+
+      /* We have the header.  Print the user's format into the
+         buffer.  */
+      __vfprintf_internal (f, fmt, ap, mode_flags);
+
+      /* Close the memory stream; this will finalize the data
+         into a malloc'd buffer in BUF.  */
+      fclose (f);
+
+      /* Tell the cancellation handler to free this buffer.  */
+      clarg.buf = buf;
+    }
+
+  /* Output to stderr if requested.  */
+  if (LogStat & LOG_PERROR)
+    {
+      struct iovec iov[2];
+      struct iovec *v = iov;
+
+      v->iov_base = buf + msgoff;
+      v->iov_len = bufsize - msgoff;
+      /* Append a newline if necessary.  */
+      if (buf[bufsize - 1] != '\n')
+        {
+          ++v;
+          v->iov_base = (char *) "\n";
+          v->iov_len = 1;
+        }
+
+      /* writev is a cancellation point.   */
+      (void) __writev (STDERR_FILENO, iov, v - iov + 1);
+    }
 
 #ifndef NO_SIGPIPE
-	/* Prepare for a broken connection.  */
- 	memset (&action, 0, sizeof (action));
- 	action.sa_handler = sigpipe_handler;
- 	sigemptyset (&action.sa_mask);
- 	sigpipe = __sigaction (SIGPIPE, &action, &oldaction);
-	if (sigpipe == 0)
-	  clarg.oldaction = &oldaction;
+  /* Prepare for a broken connection.  */
+  memset (&action, 0, sizeof (action));
+  action.sa_handler = sigpipe_handler;
+  sigemptyset (&action.sa_mask);
+  sigpipe = __sigaction (SIGPIPE, &action, &oldaction);
+  if (sigpipe == 0)
+    clarg.oldaction = &oldaction;
 #endif
 
-	/* Get connected, output the message to the local logger. */
-	if (!connected)
-		openlog_internal(LogTag, LogStat | LOG_NDELAY, 0);
-
-	/* If we have a SOCK_STREAM connection, also send ASCII NUL as
-	   a record terminator.  */
-	if (LogType == SOCK_STREAM)
-	  ++bufsize;
-
-	if (!connected || __send(LogFile, buf, bufsize, send_flags) < 0)
-	  {
-	    if (connected)
-	      {
-		/* Try to reopen the syslog connection.  Maybe it went
-		   down.  */
-		closelog_internal ();
-		openlog_internal(LogTag, LogStat | LOG_NDELAY, 0);
-	      }
-
-	    if (!connected || __send(LogFile, buf, bufsize, send_flags) < 0)
-	      {
-		closelog_internal ();	/* attempt re-open next time */
-		/*
-		 * Output the message to the console; don't worry
-		 * about blocking, if console blocks everything will.
-		 * Make sure the error reported is the one from the
-		 * syslogd failure.
-		 */
-		if (LogStat & LOG_CONS &&
-		    (fd = __open(_PATH_CONSOLE, O_WRONLY|O_NOCTTY, 0)) >= 0)
-		  {
-		    __dprintf (fd, "%s\r\n", buf + msgoff);
-		    (void)__close(fd);
-		  }
-	      }
-	  }
+  /* Get connected, output the message to the local logger.  */
+  if (!connected)
+    openlog_internal (LogTag, LogStat | LOG_NDELAY, 0);
+
+  /* If we have a SOCK_STREAM connection, also send ASCII NUL as
+     a record terminator.  */
+  if (LogType == SOCK_STREAM)
+    ++bufsize;
+
+  if (!connected || __send (LogFile, buf, bufsize, send_flags) < 0)
+    {
+      if (connected)
+        {
+          /* Try to reopen the syslog connection.  Maybe it went down.  */
+          closelog_internal ();
+          openlog_internal (LogTag, LogStat | LOG_NDELAY, 0);
+        }
+
+      if (!connected || __send (LogFile, buf, bufsize, send_flags) < 0)
+        {
+          closelog_internal ();        /* attempt re-open next time  */
+          /*
+           * Output the message to the console; don't worry
+           * about blocking, if console blocks everything will.
+           * Make sure the error reported is the one from the
+           * syslogd failure.
+           */
+          if (LogStat & LOG_CONS &&
+              (fd = __open (_PATH_CONSOLE, O_WRONLY | O_NOCTTY, 0)) >= 0)
+            {
+              __dprintf (fd, "%s\r\n", buf + msgoff);
+              (void) __close (fd);
+            }
+        }
+    }
 
 #ifndef NO_SIGPIPE
-	if (sigpipe == 0)
-		__sigaction (SIGPIPE, &oldaction, (struct sigaction *) NULL);
+  if (sigpipe == 0)
+    __sigaction (SIGPIPE, &oldaction, (struct sigaction *) NULL);
 #endif
 
- out:
-	/* End of critical section.  */
-	__libc_cleanup_pop (0);
-	__libc_lock_unlock (syslog_lock);
+out:
+  /* End of critical section.  */
+  __libc_cleanup_pop (0);
+  __libc_lock_unlock (syslog_lock);
 
-	if (buf != failbuf)
-		free (buf);
+  if (buf != failbuf)
+    free (buf);
 }
 
-static struct sockaddr_un SyslogAddr;	/* AF_UNIX address of local logger */
-
+static struct sockaddr_un SyslogAddr;  /* AF_UNIX address of local logger  */
 
 static void
-openlog_internal(const char *ident, int logstat, int logfac)
+openlog_internal (const char *ident, int logstat, int logfac)
 {
-	if (ident != NULL)
-		LogTag = ident;
-	LogStat = logstat;
-	if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0)
-		LogFacility = logfac;
-
-	int retry = 0;
-	while (retry < 2) {
-		if (LogFile == -1) {
-			SyslogAddr.sun_family = AF_UNIX;
-			(void)strncpy(SyslogAddr.sun_path, _PATH_LOG,
-				      sizeof(SyslogAddr.sun_path));
-			if (LogStat & LOG_NDELAY) {
-			  LogFile = __socket(AF_UNIX, LogType | SOCK_CLOEXEC, 0);
-			  if (LogFile == -1)
-			    return;
-			}
-		}
-		if (LogFile != -1 && !connected)
-		{
-			int old_errno = errno;
-			if (__connect(LogFile, &SyslogAddr, sizeof(SyslogAddr))
-			    == -1)
-			{
-				int saved_errno = errno;
-				int fd = LogFile;
-				LogFile = -1;
-				(void)__close(fd);
-				__set_errno (old_errno);
-				if (saved_errno == EPROTOTYPE)
-				{
-					/* retry with the other type: */
-					LogType = (LogType == SOCK_DGRAM
-						   ? SOCK_STREAM : SOCK_DGRAM);
-					++retry;
-					continue;
-				}
-			} else
-				connected = 1;
-		}
-		break;
-	}
+  if (ident != NULL)
+    LogTag = ident;
+  LogStat = logstat;
+  if (logfac != 0 && (logfac & ~LOG_FACMASK) == 0)
+    LogFacility = logfac;
+
+  int retry = 0;
+  while (retry < 2)
+    {
+      if (LogFile == -1)
+        {
+          SyslogAddr.sun_family = AF_UNIX;
+          (void) strncpy (SyslogAddr.sun_path, _PATH_LOG,
+                          sizeof (SyslogAddr.sun_path));
+          if (LogStat & LOG_NDELAY)
+            {
+              LogFile = __socket (AF_UNIX, LogType | SOCK_CLOEXEC, 0);
+              if (LogFile == -1)
+                return;
+            }
+        }
+      if (LogFile != -1 && !connected)
+        {
+          int old_errno = errno;
+          if (__connect (LogFile, &SyslogAddr, sizeof (SyslogAddr)) == -1)
+            {
+              int saved_errno = errno;
+              int fd = LogFile;
+              LogFile = -1;
+              (void) __close (fd);
+              __set_errno (old_errno);
+              if (saved_errno == EPROTOTYPE)
+                {
+                  /* retry with the other type:  */
+                  LogType = (LogType == SOCK_DGRAM
+                            ? SOCK_STREAM : SOCK_DGRAM);
+                  ++retry;
+                  continue;
+                }
+            }
+          else
+            connected = 1;
+        }
+      break;
+    }
 }
 
 void
@@ -430,20 +426,20 @@ closelog (void)
   __libc_cleanup_pop (1);
 }
 
-/* setlogmask -- set the log mask level */
+/* setlogmask -- set the log mask level  */
 int
 setlogmask (int pmask)
 {
-	int omask;
+  int omask;
 
-	/* Protect against multiple users.  */
-	__libc_lock_lock (syslog_lock);
+  /* Protect against multiple users.  */
+  __libc_lock_lock (syslog_lock);
 
-	omask = LogMask;
-	if (pmask != 0)
-		LogMask = pmask;
+  omask = LogMask;
+  if (pmask != 0)
+    LogMask = pmask;
 
-	__libc_lock_unlock (syslog_lock);
+  __libc_lock_unlock (syslog_lock);
 
-	return (omask);
+  return (omask);
 }
-- 
2.27.0

[PATCH 04/11] misc: syslog: Use bool for connected

[Adhemerval Zanella]

Checked on x86_64-linux-gnu.
---
 misc/syslog.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/misc/syslog.c b/misc/syslog.c
index 2ec986811d..668b4c852b 100644
--- a/misc/syslog.c
+++ b/misc/syslog.c
@@ -58,7 +58,7 @@
 
 static int LogType = SOCK_DGRAM;        /* Type of socket connection  */
 static int LogFile = -1;                /* fd for log  */
-static int connected;                   /* Have done connect */
+static bool connected;                  /* Have done connect */
 static int LogStat;                     /* Status bits, set by openlog()  */
 static const char *LogTag;              /* String to tag the entry with  */
 static int LogFacility = LOG_USER;      /* Default facility code  */
@@ -374,7 +374,7 @@ openlog_internal (const char *ident, int logstat, int logfac)
                 }
             }
           else
-            connected = 1;
+            connected = true;
         }
       break;
     }
@@ -408,7 +408,7 @@ closelog_internal (void)
 
   __close (LogFile);
   LogFile = -1;
-  connected = 0;
+  connected = false;
 }
 
 void
-- 
2.27.0

[PATCH 05/11] misc: syslog: Assume MSG_NOSIGNAL support (BZ #17144)

[Adhemerval Zanella]

MSG_NOSIGNAL was added on POSIX 2008 and Hurd seems to support it.
The SIGPIPE handling also makes the implementation not thread-safe
(due the sigaction usage).

Checked on x86_64-linux-gnu.
---
 misc/syslog.c                    | 49 +++-----------------------------
 sysdeps/unix/sysv/linux/syslog.c |  4 ---
 2 files changed, 4 insertions(+), 49 deletions(-)
 delete mode 100644 sysdeps/unix/sysv/linux/syslog.c

diff --git a/misc/syslog.c b/misc/syslog.c
index 668b4c852b..a3e458f54a 100644
--- a/misc/syslog.c
+++ b/misc/syslog.c
@@ -69,13 +69,6 @@ extern char *__progname;                /* Program name, from crt0.  */
 __libc_lock_define_initialized (static, syslog_lock)
 static void openlog_internal (const char *, int, int);
 static void closelog_internal (void);
-#ifndef NO_SIGPIPE
-static void sigpipe_handler (int);
-#endif
-
-#ifndef send_flags
-# define send_flags 0
-#endif
 
 struct cleanup_arg
 {
@@ -89,15 +82,8 @@ static void cancel_handler (void *ptr)
   struct cleanup_arg *clarg = (struct cleanup_arg *) ptr;
 
   if (clarg != NULL)
-    {
-#ifndef NO_SIGPIPE
-      if (clarg->oldaction != NULL)
-        __sigaction (SIGPIPE, clarg->oldaction, NULL);
-#endif
-
-      /* Free the memstream buffer,  */
-      free (clarg->buf);
-    }
+    /* Free the memstream buffer,  */
+    free (clarg->buf);
 
   /* Free the lock.  */
   __libc_lock_unlock (syslog_lock);
@@ -154,10 +140,6 @@ __vsyslog_internal (int pri, const char *fmt, va_list ap,
   char *buf = 0;
   size_t bufsize = 0;
   size_t msgoff;
-#ifndef NO_SIGPIPE
-  struct sigaction action, oldaction;
-  int sigpipe;
-#endif
   int saved_errno = errno;
   char failbuf[3 * sizeof (pid_t) + sizeof "out of memory []"];
 
@@ -268,16 +250,6 @@ __vsyslog_internal (int pri, const char *fmt, va_list ap,
       (void) __writev (STDERR_FILENO, iov, v - iov + 1);
     }
 
-#ifndef NO_SIGPIPE
-  /* Prepare for a broken connection.  */
-  memset (&action, 0, sizeof (action));
-  action.sa_handler = sigpipe_handler;
-  sigemptyset (&action.sa_mask);
-  sigpipe = __sigaction (SIGPIPE, &action, &oldaction);
-  if (sigpipe == 0)
-    clarg.oldaction = &oldaction;
-#endif
-
   /* Get connected, output the message to the local logger.  */
   if (!connected)
     openlog_internal (LogTag, LogStat | LOG_NDELAY, 0);
@@ -287,7 +259,7 @@ __vsyslog_internal (int pri, const char *fmt, va_list ap,
   if (LogType == SOCK_STREAM)
     ++bufsize;
 
-  if (!connected || __send (LogFile, buf, bufsize, send_flags) < 0)
+  if (!connected || __send (LogFile, buf, bufsize, MSG_NOSIGNAL) < 0)
     {
       if (connected)
         {
@@ -296,7 +268,7 @@ __vsyslog_internal (int pri, const char *fmt, va_list ap,
           openlog_internal (LogTag, LogStat | LOG_NDELAY, 0);
         }
 
-      if (!connected || __send (LogFile, buf, bufsize, send_flags) < 0)
+      if (!connected || __send (LogFile, buf, bufsize, MSG_NOSIGNAL) < 0)
         {
           closelog_internal ();        /* attempt re-open next time  */
           /*
@@ -314,11 +286,6 @@ __vsyslog_internal (int pri, const char *fmt, va_list ap,
         }
     }
 
-#ifndef NO_SIGPIPE
-  if (sigpipe == 0)
-    __sigaction (SIGPIPE, &oldaction, (struct sigaction *) NULL);
-#endif
-
 out:
   /* End of critical section.  */
   __libc_cleanup_pop (0);
@@ -392,14 +359,6 @@ openlog (const char *ident, int logstat, int logfac)
   __libc_cleanup_pop (1);
 }
 
-#ifndef NO_SIGPIPE
-static void
-sigpipe_handler (int signo)
-{
-  closelog_internal ();
-}
-#endif
-
 static void
 closelog_internal (void)
 {
diff --git a/sysdeps/unix/sysv/linux/syslog.c b/sysdeps/unix/sysv/linux/syslog.c
deleted file mode 100644
index cf8ce23385..0000000000
--- a/sysdeps/unix/sysv/linux/syslog.c
+++ /dev/null
@@ -1,4 +0,0 @@
-#define NO_SIGPIPE
-#define send_flags MSG_NOSIGNAL
-
-#include <misc/syslog.c>
-- 
2.27.0

[PATCH 06/11] misc: syslog: Simplify implementation

[Adhemerval Zanella]

Remove unrequired includes, use a temporary buffer for strftime instead
of using internal libio members, simplify fprintf call on the memstream
and memory allocation, use dprintf instead of writev for LOG_PERROR.

Checked on x86_64-linux-gnu.
---
 misc/syslog.c | 138 ++++++++++++++------------------------------------
 1 file changed, 38 insertions(+), 100 deletions(-)

diff --git a/misc/syslog.c b/misc/syslog.c
index a3e458f54a..cb608766cb 100644
--- a/misc/syslog.c
+++ b/misc/syslog.c
@@ -27,34 +27,16 @@
  * SUCH DAMAGE.
  */
 
-#include <sys/types.h>
+#include <libc-lock.h>
+#include <libio/libioP.h>
+#include <math_ldbl_opt.h>
+#include <paths.h>
+#include <stdarg.h>
 #include <sys/socket.h>
-#include <sys/syslog.h>
+#include <syslog.h>
 #include <sys/uio.h>
 #include <sys/un.h>
-#include <netdb.h>
-
-#include <errno.h>
-#include <fcntl.h>
-#include <paths.h>
-#include <stdio.h>
 #include <stdio_ext.h>
-#include <string.h>
-#include <time.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <libc-lock.h>
-#include <signal.h>
-#include <locale.h>
-
-#include <stdarg.h>
-
-#include <libio/libioP.h>
-#include <math_ldbl_opt.h>
-
-#include <kernel-features.h>
-
-#define ftell(s) _IO_ftell (s)
 
 static int LogType = SOCK_DGRAM;        /* Type of socket connection  */
 static int LogFile = -1;                /* fd for log  */
@@ -133,13 +115,10 @@ void
 __vsyslog_internal (int pri, const char *fmt, va_list ap,
                     unsigned int mode_flags)
 {
-  struct tm now_tm;
-  time_t now;
-  int fd;
   FILE *f;
   char *buf = 0;
   size_t bufsize = 0;
-  size_t msgoff;
+  int msgoff;
   int saved_errno = errno;
   char failbuf[3 * sizeof (pid_t) + sizeof "out of memory []"];
 
@@ -153,9 +132,7 @@ __vsyslog_internal (int pri, const char *fmt, va_list ap,
 
   /* Prepare for multiple users.  We have to take care: most
      syscalls we are using are cancellation points.  */
-  struct cleanup_arg clarg;
-  clarg.buf = NULL;
-  clarg.oldaction = NULL;
+  struct cleanup_arg clarg = { NULL, NULL };
   __libc_cleanup_push (cancel_handler, &clarg);
   __libc_lock_lock (syslog_lock);
 
@@ -169,86 +146,46 @@ __vsyslog_internal (int pri, const char *fmt, va_list ap,
 
   /* Build the message in a memory-buffer stream.  */
   f = __open_memstream (&buf, &bufsize);
-  if (f == NULL)
-    {
-      /* We cannot get a stream.  There is not much we can do but
-         emitting an error messages.  */
-      char numbuf[3 * sizeof (pid_t)];
-      char *nump;
-      char *endp = __stpcpy (failbuf, "out of memory [");
-      pid_t pid = __getpid ();
-
-      nump = numbuf + sizeof (numbuf);
-      /* The PID can never be zero.  */
-      do
-        *--nump = '0' + pid % 10;
-      while ((pid /= 10) != 0);
-
-      endp = __mempcpy (endp, nump, (numbuf + sizeof (numbuf)) - nump);
-      *endp++ = ']';
-      *endp = '\0';
-      buf = failbuf;
-      bufsize = endp - failbuf;
-      msgoff = 0;
-    }
-  else
+  if (f != NULL)
     {
       __fsetlocking (f, FSETLOCKING_BYCALLER);
-      fprintf (f, "<%d>", pri);
-      now = time_now ();
-      f->_IO_write_ptr += __strftime_l (f->_IO_write_ptr,
-                    f->_IO_write_end
-                    - f->_IO_write_ptr,
-                    "%h %e %T ",
-                    __localtime_r (&now, &now_tm),
+
+      /* "%h %e %H:%M:%S "  */
+      char timebuf[3+1                   /* "%h "  */
+                   + 2+1                 /* "%e "  */
+                   + 2+1 + 2+1 + 2+1 + 1 /* "%T "  */];
+      time_t now = time_now ();
+      struct tm now_tm;
+      __localtime_r (&now, &now_tm);
+      __strftime_l (timebuf, sizeof (timebuf), "%h %e %T ", &now_tm,
                     _nl_C_locobj_ptr);
-      msgoff = ftell (f);
-      if (LogTag == NULL)
-        LogTag = __progname;
-      if (LogTag != NULL)
-        __fputs_unlocked (LogTag, f);
-      if (LogStat & LOG_PID)
-        fprintf (f, "[%d]", (int) __getpid ());
-      if (LogTag != NULL)
-        {
-          __putc_unlocked (':', f);
-          __putc_unlocked (' ', f);
-        }
 
+      pid_t pid = LogStat & LOG_PID ? __getpid () : 0;
+
+      fprintf (f, "<%d>%s %n%s%s%.0d%s: ", pri, timebuf, &msgoff,
+               LogTag == NULL ? __progname : LogTag,
+               pid != 0 ? "[" : "", pid, pid != 0 ? "]" : "");
       /* Restore errno for %m format.  */
       __set_errno (saved_errno);
-
-      /* We have the header.  Print the user's format into the
-         buffer.  */
       __vfprintf_internal (f, fmt, ap, mode_flags);
-
-      /* Close the memory stream; this will finalize the data
-         into a malloc'd buffer in BUF.  */
       fclose (f);
 
       /* Tell the cancellation handler to free this buffer.  */
       clarg.buf = buf;
     }
+  else
+    {
+      /* We cannot get a stream.  There is not much we can do but emitting an
+         error messages.  */
+      bufsize = __snprintf (failbuf, sizeof failbuf, "out of memory[%d]",
+                            __getpid ());
+      buf = failbuf;
+    }
 
   /* Output to stderr if requested.  */
   if (LogStat & LOG_PERROR)
-    {
-      struct iovec iov[2];
-      struct iovec *v = iov;
-
-      v->iov_base = buf + msgoff;
-      v->iov_len = bufsize - msgoff;
-      /* Append a newline if necessary.  */
-      if (buf[bufsize - 1] != '\n')
-        {
-          ++v;
-          v->iov_base = (char *) "\n";
-          v->iov_len = 1;
-        }
-
-      /* writev is a cancellation point.   */
-      (void) __writev (STDERR_FILENO, iov, v - iov + 1);
-    }
+    __dprintf (STDERR_FILENO, "%s%s", buf + msgoff,
+               buf[bufsize - 1] != '\n' ? "\n" : "");
 
   /* Get connected, output the message to the local logger.  */
   if (!connected)
@@ -277,11 +214,12 @@ __vsyslog_internal (int pri, const char *fmt, va_list ap,
            * Make sure the error reported is the one from the
            * syslogd failure.
            */
+          int fd;
           if (LogStat & LOG_CONS &&
               (fd = __open (_PATH_CONSOLE, O_WRONLY | O_NOCTTY, 0)) >= 0)
             {
               __dprintf (fd, "%s\r\n", buf + msgoff);
-              (void) __close (fd);
+              __close (fd);
             }
         }
     }
@@ -312,8 +250,8 @@ openlog_internal (const char *ident, int logstat, int logfac)
       if (LogFile == -1)
         {
           SyslogAddr.sun_family = AF_UNIX;
-          (void) strncpy (SyslogAddr.sun_path, _PATH_LOG,
-                          sizeof (SyslogAddr.sun_path));
+          strncpy (SyslogAddr.sun_path, _PATH_LOG,
+                   sizeof (SyslogAddr.sun_path));
           if (LogStat & LOG_NDELAY)
             {
               LogFile = __socket (AF_UNIX, LogType | SOCK_CLOEXEC, 0);
@@ -329,7 +267,7 @@ openlog_internal (const char *ident, int logstat, int logfac)
               int saved_errno = errno;
               int fd = LogFile;
               LogFile = -1;
-              (void) __close (fd);
+              __close (fd);
               __set_errno (old_errno);
               if (saved_errno == EPROTOTYPE)
                 {
-- 
2.27.0

[PATCH 07/11] misc: syslog: Use static buffer

[Adhemerval Zanella]

The static buffer is used instead of memstream for messages up to
1024 bytes to avoid the potential BUFSIZ (8K) malloc and free for
each syslog call.  The memstream is still used as fallback for
larger messages.

Checked on x86_64-linux-gnu.
---
 misc/syslog.c | 102 +++++++++++++++++++++++++++++++++-----------------
 1 file changed, 68 insertions(+), 34 deletions(-)

diff --git a/misc/syslog.c b/misc/syslog.c
index cb608766cb..a310eba476 100644
--- a/misc/syslog.c
+++ b/misc/syslog.c
@@ -115,12 +115,11 @@ void
 __vsyslog_internal (int pri, const char *fmt, va_list ap,
                     unsigned int mode_flags)
 {
-  FILE *f;
-  char *buf = 0;
+  char *buf = NULL;
   size_t bufsize = 0;
+  bool buf_to_free = false;
   int msgoff;
   int saved_errno = errno;
-  char failbuf[3 * sizeof (pid_t) + sizeof "out of memory []"];
 
 #define INTERNALLOG LOG_ERR|LOG_CONS|LOG_PERROR|LOG_PID
   /* Check for invalid bits.  */
@@ -144,42 +143,77 @@ __vsyslog_internal (int pri, const char *fmt, va_list ap,
   if ((pri & LOG_FACMASK) == 0)
     pri |= LogFacility;
 
-  /* Build the message in a memory-buffer stream.  */
-  f = __open_memstream (&buf, &bufsize);
-  if (f != NULL)
+  pid_t pid = LogStat & LOG_PID ? __getpid () : 0;
+
+  enum
+    {
+      timebuf_size = 3+1                     /* "%h "  */
+                     + 2+1                   /* "%e "  */
+                     + 2+1 + 2+1 + 2+1 + 1,  /* "%T "  */
+
+      bufs_size    = 1024
+    };
+
+  /* "%h %e %H:%M:%S "  */
+  char timestamp[timebuf_size];
+  time_t now = time_now ();
+  struct tm now_tm;
+  __localtime_r (&now, &now_tm);
+  __strftime_l (timestamp, sizeof (timestamp), "%h %e %T ", &now_tm,
+                _nl_C_locobj_ptr);
+
+#define SYSLOG_HEADER(__pri, __timestamp, __msgoff, pid) \
+  "<%d>%s %n%s%s%.0d%s: ",                               \
+  __pri, __timestamp, __msgoff,                          \
+  LogTag == NULL ? __progname : LogTag,                  \
+  pid != 0 ? "[" : "", pid, pid != 0 ? "]" : ""
+
+  /* Try to use a static buffer as an optimization.  */
+  char bufs[bufs_size];
+  int l = __snprintf (bufs, sizeof bufs,
+                      SYSLOG_HEADER (pri, timestamp, &msgoff, pid));
+  if (l < sizeof (bufs))
     {
-      __fsetlocking (f, FSETLOCKING_BYCALLER);
-
-      /* "%h %e %H:%M:%S "  */
-      char timebuf[3+1                   /* "%h "  */
-                   + 2+1                 /* "%e "  */
-                   + 2+1 + 2+1 + 2+1 + 1 /* "%T "  */];
-      time_t now = time_now ();
-      struct tm now_tm;
-      __localtime_r (&now, &now_tm);
-      __strftime_l (timebuf, sizeof (timebuf), "%h %e %T ", &now_tm,
-                    _nl_C_locobj_ptr);
-
-      pid_t pid = LogStat & LOG_PID ? __getpid () : 0;
-
-      fprintf (f, "<%d>%s %n%s%s%.0d%s: ", pri, timebuf, &msgoff,
-               LogTag == NULL ? __progname : LogTag,
-               pid != 0 ? "[" : "", pid, pid != 0 ? "]" : "");
+      va_list apc;
+      va_copy (apc, ap);
+
       /* Restore errno for %m format.  */
       __set_errno (saved_errno);
-      __vfprintf_internal (f, fmt, ap, mode_flags);
-      fclose (f);
+      int vl = __vsnprintf_internal (bufs + l, sizeof (bufs) - l, fmt, apc,
+                                     mode_flags);
+      if (l + vl < sizeof (bufs))
+        {
+          buf = bufs;
+          bufsize = l + vl;
+        }
 
-      /* Tell the cancellation handler to free this buffer.  */
-      clarg.buf = buf;
+      va_end (apc);
     }
-  else
+
+  /* If the required size is larger than buffer size fallbacks to
+     open_memstream.  */
+  if (buf == NULL)
     {
-      /* We cannot get a stream.  There is not much we can do but emitting an
-         error messages.  */
-      bufsize = __snprintf (failbuf, sizeof failbuf, "out of memory[%d]",
-                            __getpid ());
-      buf = failbuf;
+      FILE *f = __open_memstream (&buf, &bufsize);
+      if (f != NULL)
+        {
+          __fsetlocking (f, FSETLOCKING_BYCALLER);
+          fprintf (f, SYSLOG_HEADER (pri, timestamp, &msgoff, pid));
+          /* Restore errno for %m format.  */
+          __set_errno (saved_errno);
+          __vfprintf_internal (f, fmt, ap, mode_flags);
+          fclose (f);
+
+          /* Tell the cancellation handler to free this buffer.  */
+          buf_to_free = true;
+          clarg.buf = buf;
+        }
+      else
+        {
+          bufsize = __snprintf (bufs, sizeof bufs,
+                                "out of memory[%d]", __getpid ());
+          buf = bufs;
+        }
     }
 
   /* Output to stderr if requested.  */
@@ -229,7 +263,7 @@ out:
   __libc_cleanup_pop (0);
   __libc_lock_unlock (syslog_lock);
 
-  if (buf != failbuf)
+  if (buf_to_free)
     free (buf);
 }
 
-- 
2.27.0

[PATCH 08/11] misc: syslog: Use CLOC_EXEC with _PATH_CONSOLE (BZ #17145)

[Adhemerval Zanella]

The syslog open the '/dev/console' for LOG_CONS without O_CLOEXEC,
which might leak in multithread programs that call fork.

Checked on x86_64-linux-gnu.
---
 misc/syslog.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/misc/syslog.c b/misc/syslog.c
index a310eba476..b595889e1c 100644
--- a/misc/syslog.c
+++ b/misc/syslog.c
@@ -250,7 +250,8 @@ __vsyslog_internal (int pri, const char *fmt, va_list ap,
            */
           int fd;
           if (LogStat & LOG_CONS &&
-              (fd = __open (_PATH_CONSOLE, O_WRONLY | O_NOCTTY, 0)) >= 0)
+              (fd = __open (_PATH_CONSOLE, O_WRONLY | O_NOCTTY | O_CLOEXEC,
+                            0)) >= 0)
             {
               __dprintf (fd, "%s\r\n", buf + msgoff);
               __close (fd);
-- 
2.27.0

[PATCH 09/11] misc: syslog: Use static const for AF_UNIX address

[Adhemerval Zanella]

Checked on x86_64-linux-gnu.
---
 misc/syslog.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/misc/syslog.c b/misc/syslog.c
index b595889e1c..be12bcc91d 100644
--- a/misc/syslog.c
+++ b/misc/syslog.c
@@ -268,7 +268,12 @@ out:
     free (buf);
 }
 
-static struct sockaddr_un SyslogAddr;  /* AF_UNIX address of local logger  */
+/* AF_UNIX address of local logger  */
+static const struct sockaddr_un SyslogAddr =
+  {
+    .sun_family = AF_UNIX,
+    .sun_path = _PATH_LOG
+  };
 
 static void
 openlog_internal (const char *ident, int logstat, int logfac)
@@ -284,9 +289,6 @@ openlog_internal (const char *ident, int logstat, int logfac)
     {
       if (LogFile == -1)
         {
-          SyslogAddr.sun_family = AF_UNIX;
-          strncpy (SyslogAddr.sun_path, _PATH_LOG,
-                   sizeof (SyslogAddr.sun_path));
           if (LogStat & LOG_NDELAY)
             {
               LogFile = __socket (AF_UNIX, LogType | SOCK_CLOEXEC, 0);
-- 
2.27.0

[PATCH 10/11] misc: syslog: Move SYSLOG_NAME to USE_MISC (BZ #16355)

[Adhemerval Zanella]

There is no easy solution as described on first comment in bug report,
and some code (like busybox) assumes facilitynames existance when
SYSLOG_NAMES is defined (so we can't just remove it as suggested in
comment #2).

So use the easier solution and guard it with __USE_MISC.
---
 misc/sys/syslog.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/misc/sys/syslog.h b/misc/sys/syslog.h
index dc3b0e7ef8..bf368d1b8d 100644
--- a/misc/sys/syslog.h
+++ b/misc/sys/syslog.h
@@ -62,7 +62,7 @@
 #define	LOG_PRI(p)	((p) & LOG_PRIMASK)
 #define	LOG_MAKEPRI(fac, pri)	((fac) | (pri))
 
-#ifdef SYSLOG_NAMES
+#if defined(SYSLOG_NAMES) && defined(__USE_MISC)
 #define	INTERNAL_NOPRI	0x10	/* the "no priority" priority */
 				/* mark "facility" */
 #define	INTERNAL_MARK	LOG_MAKEPRI(LOG_NFACILITIES << 3, 0)
@@ -118,7 +118,7 @@ CODE prioritynames[] =
 				/* facility of pri */
 #define	LOG_FAC(p)	(((p) & LOG_FACMASK) >> 3)
 
-#ifdef SYSLOG_NAMES
+#if defined(SYSLOG_NAMES) && defined(__USE_MISC)
 CODE facilitynames[] =
   {
     { "auth", LOG_AUTH },
-- 
2.27.0

[PATCH 11/11] misc: syslog: Use RFC5424

[Adhemerval Zanella]

Current syslog format provides limited timestamp information (not full
year information nor microsecond precision) and the timezone information
might incur in confusion [1] since there is no metadata information on
how it was generated.

So instead of using another ad-hoc syslog format, this patch adapts it
to follow RFC5424:

  - VERSION is set as 1.
  - TIMESTAMP is logged as described by RFC 3339 using UTC ('Z') with
    maximum allowed TIME-SECFRAC precision (microseconds).
  - HOSTNAME is obtained with gethostname (as allowed by the RFC).
  - PROCID is only set if LOG_PID is previously set by openlog.
  - MSGID and STRUCTURED-DATA are both set to NILVALUE.

Checked on x86_64-linux-gnu.

[1] https://sourceware.org/pipermail/libc-alpha/2021-March/123583.html
---
 include/time.h    |  8 ++++++
 misc/syslog.c     | 69 +++++++++++++++++++++++++++++++----------------
 misc/tst-syslog.c | 30 ++++++++++-----------
 3 files changed, 68 insertions(+), 39 deletions(-)

diff --git a/include/time.h b/include/time.h
index caf2af5e74..3defec6c20 100644
--- a/include/time.h
+++ b/include/time.h
@@ -502,6 +502,14 @@ time_now (void)
   __clock_gettime (TIME_CLOCK_GETTIME_CLOCKID, &ts);
   return ts.tv_sec;
 }
+
+static inline struct __timespec64
+timespec64_now (void)
+{
+  struct __timespec64 ts64;
+  __clock_gettime64 (TIME_CLOCK_GETTIME_CLOCKID, &ts64);
+  return ts64;
+}
 #endif
 
 #endif
diff --git a/misc/syslog.c b/misc/syslog.c
index be12bcc91d..36cdf037f8 100644
--- a/misc/syslog.c
+++ b/misc/syslog.c
@@ -38,6 +38,10 @@
 #include <sys/un.h>
 #include <stdio_ext.h>
 
+#ifndef HOST_NAME_MAX
+# define HOST_NAME_MAX 64
+#endif
+
 static int LogType = SOCK_DGRAM;        /* Type of socket connection  */
 static int LogFile = -1;                /* fd for log  */
 static bool connected;                  /* Have done connect */
@@ -111,6 +115,30 @@ __vsyslog_chk (int pri, int flag, const char *fmt, va_list ap)
   __vsyslog_internal (pri, fmt, ap, (flag > 0) ? PRINTF_FORTIFY : 0);
 }
 
+/* Defined by RFC5424.  */
+#define NILVALUE "-"
+
+struct timebuf_t
+{
+  char b[sizeof ("YYYY-MM-DDThh:mm:ss.nnnnnnZ")];
+};
+
+/* Fill TIMEBUF with a RFC3339 timestamp.  Use UTC time and maximum
+   TIME-SECFRAC accurancy allowed (6 digits for microseconds).  */
+static void
+syslog_rfc3339_timestamp (struct timebuf_t *timebuf)
+{
+  struct __timespec64 ts = timespec64_now ();
+  struct tm now_tm;
+  __gmtime64_r (&ts.tv_sec, &now_tm);
+
+  __snprintf (timebuf->b, sizeof (timebuf->b),
+              "%04d-%02d-%02dT%02d:%02d:%02d.%06dZ",
+              now_tm.tm_year + 1900, now_tm.tm_mon + 1, now_tm.tm_mday,
+              now_tm.tm_hour, now_tm.tm_min, now_tm.tm_sec,
+              (int32_t) ts.tv_nsec / 1000);
+}
+
 void
 __vsyslog_internal (int pri, const char *fmt, va_list ap,
                     unsigned int mode_flags)
@@ -143,35 +171,30 @@ __vsyslog_internal (int pri, const char *fmt, va_list ap,
   if ((pri & LOG_FACMASK) == 0)
     pri |= LogFacility;
 
-  pid_t pid = LogStat & LOG_PID ? __getpid () : 0;
-
-  enum
-    {
-      timebuf_size = 3+1                     /* "%h "  */
-                     + 2+1                   /* "%e "  */
-                     + 2+1 + 2+1 + 2+1 + 1,  /* "%T "  */
+  struct timebuf_t timestamp;
+  syslog_rfc3339_timestamp (&timestamp);
 
-      bufs_size    = 1024
-    };
+  char hostname[HOST_NAME_MAX];
+  if (__gethostname (hostname, sizeof (hostname)) == -1)
+    strcpy (hostname, NILVALUE);
 
-  /* "%h %e %H:%M:%S "  */
-  char timestamp[timebuf_size];
-  time_t now = time_now ();
-  struct tm now_tm;
-  __localtime_r (&now, &now_tm);
-  __strftime_l (timestamp, sizeof (timestamp), "%h %e %T ", &now_tm,
-                _nl_C_locobj_ptr);
+  pid_t pid = LogStat & LOG_PID ? __getpid () : 0;
 
-#define SYSLOG_HEADER(__pri, __timestamp, __msgoff, pid) \
-  "<%d>%s %n%s%s%.0d%s: ",                               \
-  __pri, __timestamp, __msgoff,                          \
-  LogTag == NULL ? __progname : LogTag,                  \
-  pid != 0 ? "[" : "", pid, pid != 0 ? "]" : ""
+#define SYSLOG_HEADER(__pri, __timestamp, __msgoff, __hostname, __pid) \
+  "<%d>1 %s %n%s %s %s%.0d %s %s ",                      \
+  __pri,                                /* PRI  */       \
+  __timestamp.b,                        /* TIMESTAMP  */ \
+  __msgoff, __hostname,                 /* HOSTNAME  */  \
+  LogTag == NULL ? __progname : LogTag, /* APP-NAME  */  \
+  NILVALUE + !!__pid, __pid,            /* PROCID  */    \
+  NILVALUE,                             /* MSGID  */     \
+  NILVALUE                              /* STRUCT-DATA */
 
   /* Try to use a static buffer as an optimization.  */
+  enum { bufs_size  = 1024 };
   char bufs[bufs_size];
   int l = __snprintf (bufs, sizeof bufs,
-                      SYSLOG_HEADER (pri, timestamp, &msgoff, pid));
+                      SYSLOG_HEADER (pri, timestamp, &msgoff, hostname, pid));
   if (l < sizeof (bufs))
     {
       va_list apc;
@@ -198,7 +221,7 @@ __vsyslog_internal (int pri, const char *fmt, va_list ap,
       if (f != NULL)
         {
           __fsetlocking (f, FSETLOCKING_BYCALLER);
-          fprintf (f, SYSLOG_HEADER (pri, timestamp, &msgoff, pid));
+          fprintf (f, SYSLOG_HEADER (pri, timestamp, &msgoff, hostname, pid));
           /* Restore errno for %m format.  */
           __set_errno (saved_errno);
           __vfprintf_internal (f, fmt, ap, mode_flags);
diff --git a/misc/tst-syslog.c b/misc/tst-syslog.c
index ed8c528db4..5b24927afe 100644
--- a/misc/tst-syslog.c
+++ b/misc/tst-syslog.c
@@ -18,6 +18,7 @@
 
 #include <array_length.h>
 #include <fcntl.h>
+#include <intprops.h>
 #include <paths.h>
 #include <netinet/in.h>
 #include <support/capture_subprocess.h>
@@ -201,7 +202,7 @@ check_openlog_message (const struct msg_t *msg, int msgnum,
     {
       if (options & LOG_PID)
         TEST_COMPARE (msg->pid, pid);
-      TEST_COMPARE_STRING (msg->ident, expected_ident);
+      TEST_COMPARE_STRING (msg->ident, OPENLOG_IDENT);
       TEST_COMPARE (msg->facility, LOG_LOCAL0);
     }
   else if (msgnum < 2 * array_length (priorities))
@@ -218,28 +219,25 @@ check_openlog_message (const struct msg_t *msg, int msgnum,
   return true;
 }
 
+#define NILVALUE "-"
+
 static struct msg_t
 parse_syslog_msg (const char *msg)
 {
   struct msg_t r = { .pid = -1 };
   int number;
+  char procid[INT_BUFSIZE_BOUND (pid_t)];
 
   /* The message in the form:
-     <179>Apr  8 14:51:19 tst-syslog: syslog message 176 3  */
-  int n = sscanf (msg, "<%3d>%*s %*d %*d:%*d:%*d %32s %64s %*d %*d",
-                  &number, r.ident, r.msg);
-  TEST_COMPARE (n, 3);
+     <34>1 2003-10-11T22:14:15.003Z mymachine openlog_ident PID - MSG  */
+  int n = sscanf (msg, "<%6d>1 %*s %*s %32s %s - - %s",
+                  &number, r.ident, procid, r.msg);
+  TEST_COMPARE (n, 4);
 
   r.facility = number & LOG_FACMASK;
   r.priority = number & LOG_PRIMASK;
-
-  char *pid_start = strchr (r.ident, '[');
-  if (pid_start != NULL)
-    {
-       char *pid_end = strchr (r.ident, ']');
-       if (pid_end != NULL)
-         r.pid = strtoul (pid_start + 1, NULL, 10);
-    }
+  r.pid = strcmp (procid, NILVALUE) == 0
+          ? 0 : strtoul (procid, NULL, 10);
 
   return r;
 }
@@ -252,8 +250,8 @@ parse_syslog_console (const char *msg)
   struct msg_t r;
 
   /* The message in the form:
-     openlog_ident: syslog_message 128 0  */
-  int n = sscanf (msg, "%32s %64s %d %d",
+     mymachine openlog_ident PID - syslog_message 128 0  */
+  int n = sscanf (msg, "%*s %32s %*s - - %s %d %d",
       r.ident, r.msg, &facility, &priority);
   TEST_COMPARE (n, 4);
 
@@ -390,7 +388,7 @@ check_syslog_console_read (FILE *fp)
   while (fgets (buf, sizeof (buf), fp) != NULL)
     {
       struct msg_t msg = parse_syslog_console (buf);
-      TEST_COMPARE_STRING (msg.ident, OPENLOG_IDENT ":");
+      TEST_COMPARE_STRING (msg.ident, OPENLOG_IDENT);
       TEST_COMPARE (msg.priority, priorities[msgnum]);
       TEST_COMPARE (msg.facility, LOG_LOCAL0);
 
-- 
2.27.0

Re: [PATCH 04/11] misc: syslog: Use bool for connected

[Andreas Schwab]

Ok.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."

Re: [PATCH 05/11] misc: syslog: Assume MSG_NOSIGNAL support (BZ #17144)

[Andreas Schwab]

On Apr 12 2021, Adhemerval Zanella via Libc-alpha wrote:

> MSG_NOSIGNAL was added on POSIX 2008 and Hurd seems to support it.
> The SIGPIPE handling also makes the implementation not thread-safe
> (due the sigaction usage).

Ok.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."

Re: [PATCH 08/11] misc: syslog: Use CLOC_EXEC with _PATH_CONSOLE (BZ #17145)

[Andreas Schwab]

On Apr 12 2021, Adhemerval Zanella via Libc-alpha wrote:

> The syslog open the '/dev/console' for LOG_CONS without O_CLOEXEC,
> which might leak in multithread programs that call fork.

Ok.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."

Re: [PATCH 09/11] misc: syslog: Use static const for AF_UNIX address

[Andreas Schwab]

Ok.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."