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From: "ed at catmur dot co dot uk" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/15772] New: "Permission denied" compiling glibc 2.3.3 on reiser4: EACCES fatal to #include Date: Wed, 02 Jun 2004 10:28:00 -0000 [thread overview] Message-ID: <20040602102803.15772.ed@catmur.co.uk> (raw) http://linuxfromscratch.org/pipermail/lfs-hackers/2004-May/001096.html http://bugs.gentoo.org/show_bug.cgi?id=52755 http://forums.gentoo.org/viewtopic.php?t=108718&start=600#1093328 gcc nss_nis/nis-service.c -c -std=gnu99 -O2 -Wall -Winline -Wstrict-prototypes -Wwrite-strings -fprefetch-loop-arrays -freorder-blocks -march=athlon-xp -pipe -mpreferred-stack-boundary=2 -fPIC -I../include -I. -I/var/tmp/portage/glibc-2.3.3_pre20040420-r1/work/glibc-2.3.2/buildhere/nis -I.. -I../libio -I../nptl -I/var/tmp/portage/glibc-2.3.3_pre20040420-r1/work/glibc-2.3.2/buildhere -I../sysdeps/i386/elf -I../nptl/sysdeps/unix/sysv/linux/i386/i686 -I../nptl/sysdeps/unix/sysv/linux/i386 -I../nptl/sysdeps/unix/sysv/linux -I../nptl/sysdeps/pthread -I../sysdeps/pthread -I../nptl/sysdeps/unix/sysv -I../nptl/sysdeps/unix -I../nptl/sysdeps/i386/i686 -I../nptl/sysdeps/i386 -I../sysdeps/unix/sysv/linux/i386 -I../sysdeps/unix/sysv/linux -I../sysdeps/gnu -I../sysdeps/unix/common -I../sysdeps/unix/mman -I../sysdeps/unix/inet -I../sysdeps/unix/sysv/i386 -I../sysdeps/unix/sysv -I../sysdeps/unix/i386 -I../sysdeps/unix -I../sysdeps/posix -I../sysdeps/i386/i686/fpu -I../sysdeps/i386/i686 -I../sysdeps/i386/i486 -I../nptl/sysdeps/i386/i486 -I../sysdeps/i386/fpu -I../sysdeps/i386 -I../sysdeps/wordsize-32 -I../sysdeps/ieee754/ldbl-96 -I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754/flt-32 -I../sysdeps/ieee754 -I../sysdeps/generic/elf -I../sysdeps/generic -nostdinc -isystem /usr/lib/gcc/i686-pc-linux-gnu/3.4.0/include -isystem //usr/include -D_LIBC_REENTRANT -D_LIBC_REENTRANT -include ../include/libc-symbols.h -DPIC -DSHARED -DNOT_IN_libc=1 -DIS_IN_libnss_nis=1 -o /var/tmp/portage/glibc-2.3.3_pre20040420-r1/work/glibc-2.3.2/buildhere/nis/nis-service.os -MD -MP -MF /var/tmp/portage/glibc-2.3.3_pre20040420-r1/work/glibc-2.3.2/buildhere/nis/nis-service.os.dt In file included from nss_nis/nis-proto.c:20: ../include/nss.h:1:21: ./nss/nss.h: Permission denied In file included from nss_nis/nis-service.c:20: ../include/nss.h:1:21: ./nss/nss.h: Permission denied In file included from ./nss-nis.h:24, from nss_nis/nis-proto.c:29: ../include/nsswitch.h:1:26: ./nss/nsswitch.h: Permission denied ... Situation: reiser4 filesystem, wd contains an ordinary file mode 0644 named 'nss'. (This is important). Cause: in gcc/cppfiles.c, _cpp_find_file() calls find_file_in_dir() on . for nss/nsswitch.h find_file_in_dir() calls open_file() on ./nss/nsswitch.h open_file() calls open() on ./nss/nsswitch.h Instead of failing ENOTDIR, open() fails EACCES. This is because under reiser4 all files are directories so ENOTDIR is unused as an error code; instead it tries to read 'nss' as a directory but as 'nss' is 0644 its "directory contents" are not accessible. On any normal file system, open() fails ENOTDIR, open_file() returns false converting ENOTDIR to ENOENT, find_file_in_dir() returns false, and _cpp_find_file() continues to the next node in the include list, eventually finding nss/nsswitch.h in -I.. On reiser4, open() fails EACCES, open_file() returns false, find_file_in_dir() calls open_file_failed() and returns true, everything falls apart. The workaround I suggest for glibc is to make 'nss' 0755 thus causing open() to fail ENOENT which causes _cpp_find_file_in_dir() to continue to the next node in the include list. The fix I suggest for gcc is to make EACCES non-fatal: gcc should instead of failing print a warning message and continue searching for an include file it can access. The patch is obvious and I will attach it as soon as I have tested it properly. -- Summary: "Permission denied" compiling glibc 2.3.3 on reiser4: EACCES fatal to #include Product: gcc Version: 3.4.0 Status: UNCONFIRMED Severity: normal Priority: P2 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: ed at catmur dot co dot uk CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15772
next reply other threads:[~2004-06-02 10:28 UTC|newest] Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top 2004-06-02 10:28 ed at catmur dot co dot uk [this message] 2004-06-02 11:16 ` [Bug c/15772] " dannysmith at users dot sourceforge dot net 2004-06-02 12:18 ` ed at catmur dot co dot uk 2004-06-02 12:40 ` pinskia at gcc dot gnu dot org 2004-06-02 13:25 ` ed at catmur dot co dot uk 2004-06-02 13:31 ` ed at catmur dot co dot uk 2004-06-02 13:41 ` ed at catmur dot co dot uk 2004-06-02 13:43 ` [Bug preprocessor/15772] " pinskia at gcc dot gnu dot org 2004-06-02 17:23 ` neil at gcc dot gnu dot org 2004-06-05 21:42 ` ed at catmur dot co dot uk 2004-08-24 1:11 ` andy at benton987 dot fsnet dot co dot uk
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