diff options
| author | Yuriy Kolerov <yuriy.kolerov@synopsys.com> | 2015-09-23 15:43:39 +0300 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2015-10-05 22:07:08 +0200 |
| commit | 9fae2ad9937279c9f7f40975ac14cb7b57f4a36d (patch) | |
| tree | 670781363cabeb335c490ee1f47e305b9bbf3a33 /libc/sysdeps/linux/common/posix_fallocate.c | |
| parent | 4480f9b5558906fce2c35f1819d4e1fe5922a9fa (diff) | |
libc: posix_fallocate must return an error number on failure
posix_fallocate implementation in uClibc relies on fallocate
system call - it just returns what fallocate returns. However
fallocate returns -1 on failure and assigns an error number
to errno variable. In the same time posix_fallocate must
return an error number but not -1.
What does this patch: if fallocate returns -1 then posix_fallocate
returns errno. Otherwise posix_fallocate returns 0 on success.
However there is a side effect - posix_fallocate sets errno on
failure because fallocate does it. But POSIX does not forbid it
thus it's not a problem.
Signed-off-by: Yuriy Kolerov <yuriy.kolerov@synopsys.com>
Diffstat (limited to 'libc/sysdeps/linux/common/posix_fallocate.c')
| -rw-r--r-- | libc/sysdeps/linux/common/posix_fallocate.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/common/posix_fallocate.c b/libc/sysdeps/linux/common/posix_fallocate.c index 76771e353..2316cfdcd 100644 --- a/libc/sysdeps/linux/common/posix_fallocate.c +++ b/libc/sysdeps/linux/common/posix_fallocate.c @@ -12,12 +12,15 @@ #include <fcntl.h> #include <bits/kernel-features.h> #include <stdint.h> +#include <errno.h> #if defined __NR_fallocate extern __typeof(fallocate) __libc_fallocate attribute_hidden; int posix_fallocate(int fd, __off_t offset, __off_t len) { - return __libc_fallocate(fd, 0, offset, len); + if (__libc_fallocate(fd, 0, offset, len)) + return errno; + return 0; } # if defined __UCLIBC_HAS_LFS__ && __WORDSIZE == 64 strong_alias(posix_fallocate,posix_fallocate64) |