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| author | Mattias Andrée <maandree@member.fsf.org> | 2016-01-04 23:48:59 +0100 |
|---|---|---|
| committer | Mattias Andrée <maandree@member.fsf.org> | 2016-01-04 23:49:04 +0100 |
| commit | fd98286b24a10c2b53f4f4172f68ea8ce46ce1a7 (patch) | |
| tree | 80b7028db75d11490a1ab5351db8d00ed1b20117 /doc/man | |
| parent | add man pages (diff) | |
| download | libhaiku-fd98286b24a10c2b53f4f4172f68ea8ce46ce1a7.tar.gz libhaiku-fd98286b24a10c2b53f4f4172f68ea8ce46ce1a7.tar.bz2 libhaiku-fd98286b24a10c2b53f4f4172f68ea8ce46ce1a7.tar.xz | |
macro that allows errno == 0
Signed-off-by: Mattias Andrée <maandree@member.fsf.org>
Diffstat (limited to 'doc/man')
| -rw-r--r-- | doc/man/libhaiku_perror.3 | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/doc/man/libhaiku_perror.3 b/doc/man/libhaiku_perror.3 index 7c0476d..1514470 100644 --- a/doc/man/libhaiku_perror.3 +++ b/doc/man/libhaiku_perror.3 @@ -33,7 +33,18 @@ Unlike .B libhaiku_perror shall not print anything if .B errno -is zero. +is zero. If you rather it did, you can use the macro +.PP +.nf +#define libhaiku_perror(s) \\ + do { \\ + const char *s__ = (s); \\ + if (errno && s__) \\ + perror(s__); \\ + errno = errno ? errno : -1; \\ + libhaiku_perror(s__); \\ + } while (0) +.fi .SH "SEE ALSO" .BR libhaiku (7), .BR perror (3) |