* [PATCH] silence unused results warnings from compilers
@ 2021-04-11 15:07 Mike Frysinger
0 siblings, 0 replies; only message in thread
From: Mike Frysinger @ 2021-04-11 15:07 UTC (permalink / raw)
To: bzip2-devel
Newer C libraries mark these funcs with warn_unused_result, and newer
compilers use that to emit warnings. The classic (void) cast is not
sufficient either. Put them into an if() check with an empty body.
---
bzip2.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/bzip2.c b/bzip2.c
index d1f2fa85357c..0f3adfbc3428 100644
--- a/bzip2.c
+++ b/bzip2.c
@@ -854,6 +854,8 @@ void mySIGSEGVorSIGBUScatcher ( IntNative n )
" system, please try and read it before mailing me. If you don't\n"
" have the manual or can't be bothered to read it, mail me anyway.\n"
"\n";
+ /* Ignore any errors from write. Not much we can do here. */
+#define write(...) if (write(__VA_ARGS__)) {}
write ( STDERR_FILENO, "\n", 1 );
write ( STDERR_FILENO, progName, strlen ( progName ) );
write ( STDERR_FILENO, msg, strlen ( msg ) );
@@ -866,6 +868,7 @@ void mySIGSEGVorSIGBUScatcher ( IntNative n )
write ( STDERR_FILENO, msg, strlen (msg) );
write ( STDERR_FILENO, outName, strlen (outName) );
write ( STDERR_FILENO, "\n", 1 );
+#undef write
/* Don't call cleanupAndFail. If we ended up here something went
terribly wrong. Trying to clean up might fail spectacularly. */
@@ -1078,10 +1081,11 @@ void applySavedFileAttrToOutputFile ( IntNative fd )
retVal = fchmod ( fd, fileMetaInfo.st_mode );
ERROR_IF_NOT_ZERO ( retVal );
- (void) fchown ( fd, fileMetaInfo.st_uid, fileMetaInfo.st_gid );
- /* chown() will in many cases return with EPERM, which can
- be safely ignored.
- */
+ if (fchown ( fd, fileMetaInfo.st_uid, fileMetaInfo.st_gid )) {
+ /* chown() will in many cases return with EPERM, which can
+ be safely ignored.
+ */
+ }
# endif
}
--
2.30.2
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