diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/libc/gen/pmadvise.c | 12 | ||||
| -rw-r--r-- | lib/libc/sys/madvise.2 | 7 | ||||
| -rw-r--r-- | lib/libc/sys/posix_fadvise.2 | 4 | ||||
| -rw-r--r-- | lib/libc/sys/posix_fallocate.2 | 5 |
4 files changed, 20 insertions, 8 deletions
diff --git a/lib/libc/gen/pmadvise.c b/lib/libc/gen/pmadvise.c index 60cef63..0dc77e3 100644 --- a/lib/libc/gen/pmadvise.c +++ b/lib/libc/gen/pmadvise.c @@ -8,9 +8,19 @@ __FBSDID("$FreeBSD$"); #include <sys/mman.h> +#include <errno.h> int posix_madvise(void *address, size_t size, int how) { - return madvise(address, size, how); + int ret, saved_errno; + + saved_errno = errno; + if (madvise(address, size, how) == -1) { + ret = errno; + errno = saved_errno; + } else { + ret = 0; + } + return (ret); } diff --git a/lib/libc/sys/madvise.2 b/lib/libc/sys/madvise.2 index b5ea6b2..357e05e 100644 --- a/lib/libc/sys/madvise.2 +++ b/lib/libc/sys/madvise.2 @@ -28,7 +28,7 @@ .\" @(#)madvise.2 8.1 (Berkeley) 6/9/93 .\" $FreeBSD$ .\" -.Dd July 19, 1996 +.Dd January 30, 2014 .Dt MADVISE 2 .Os .Sh NAME @@ -50,7 +50,10 @@ allows a process that has knowledge of its memory behavior to describe it to the system. The .Fn posix_madvise -interface is identical and is provided for standards conformance. +interface is identical, except it returns an error number on error and does +not modify +.Va errno , +and is provided for standards conformance. .Pp The known behaviors are: .Bl -tag -width MADV_SEQUENTIAL diff --git a/lib/libc/sys/posix_fadvise.2 b/lib/libc/sys/posix_fadvise.2 index 7a9a648..8691f6b 100644 --- a/lib/libc/sys/posix_fadvise.2 +++ b/lib/libc/sys/posix_fadvise.2 @@ -28,7 +28,7 @@ .\" @(#)madvise.2 8.1 (Berkeley) 6/9/93 .\" $FreeBSD$ .\" -.Dd June 19, 2012 +.Dd January 30, 2014 .Dt POSIX_FADVISE 2 .Os .Sh NAME @@ -93,7 +93,7 @@ Future access to this data may require a read operation. .Sh ERRORS The .Fn posix_fadvise -system call will fail if: +system call returns zero on success, and an error on failure: .Bl -tag -width Er .It Bq Er EBADF The diff --git a/lib/libc/sys/posix_fallocate.2 b/lib/libc/sys/posix_fallocate.2 index 7b17133..7501777 100644 --- a/lib/libc/sys/posix_fallocate.2 +++ b/lib/libc/sys/posix_fallocate.2 @@ -83,9 +83,8 @@ that reduces the file size to a size smaller than If successful, .Fn posix_fallocate returns zero. -It returns -1 on failure, and sets -.Va errno -to indicate the error. +It returns an error on failure, without setting +.Va errno . .Sh ERRORS Possible failure conditions: .Bl -tag -width Er |
