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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2018-11-19 20:22:30 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2018-11-19 20:22:30 +0100 |
| commit | b15b1a959040fe8cdfbc51092a7b72032f6c9b86 (patch) | |
| tree | c9fb074b5b255296be118f5e6c0ffba21bf2caca /sysdeps/mach | |
| parent | 0c7f97aead9bf82f868d39cf7dc179caf224189a (diff) | |
| download | glibc-b15b1a959040fe8cdfbc51092a7b72032f6c9b86.tar.gz glibc-b15b1a959040fe8cdfbc51092a7b72032f6c9b86.tar.xz glibc-b15b1a959040fe8cdfbc51092a7b72032f6c9b86.zip | |
hurd: Support lockf at offset 0 with size 0 or 1.
* sysdeps/mach/hurd/f_setlk.c: Include <unistd.h>. (__f_setlk): When whence is SEEK_CUR, use __lseek64 to convert it to SEEK_SET.
Diffstat (limited to 'sysdeps/mach')
| -rw-r--r-- | sysdeps/mach/hurd/f_setlk.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/f_setlk.c b/sysdeps/mach/hurd/f_setlk.c index 718af67e32..edfb292dbf 100644 --- a/sysdeps/mach/hurd/f_setlk.c +++ b/sysdeps/mach/hurd/f_setlk.c @@ -19,6 +19,7 @@ #include <sys/types.h> #include <sys/file.h> #include <fcntl.h> +#include <unistd.h> #include <errno.h> /* XXX @@ -45,6 +46,18 @@ __f_setlk (int fd, int type, int whence, __off64_t start, __off64_t len, int wai if (cmd != LOCK_UN && wait == 0) cmd |= LOCK_NB; + if (whence == SEEK_CUR) + { + /* In case the target position is 0, we can support it below. */ + __off64_t cur = __lseek64 (fd, 0, SEEK_CUR); + + if (cur >= 0) + { + start = cur + start; + whence = SEEK_SET; + } + } + switch (whence) { case SEEK_SET: |