diff options
Diffstat (limited to 'contrib/file/src/pread.c')
| -rw-r--r-- | contrib/file/src/pread.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/contrib/file/src/pread.c b/contrib/file/src/pread.c index 649f609..72d3a6b 100644 --- a/contrib/file/src/pread.c +++ b/contrib/file/src/pread.c @@ -1,14 +1,23 @@ #include "file.h" #ifndef lint -FILE_RCSID("@(#)$File: pread.c,v 1.2 2013/04/02 16:23:07 christos Exp $") +FILE_RCSID("@(#)$File: pread.c,v 1.3 2014/09/15 19:11:25 christos Exp $") #endif /* lint */ #include <fcntl.h> #include <unistd.h> ssize_t pread(int fd, void *buf, size_t len, off_t off) { - if (lseek(fd, off, SEEK_SET) == (off_t)-1) + off_t old; + ssize_t rv; + + if ((old = lseek(fd, off, SEEK_SET)) == -1) + return -1; + + if ((rv = read(fd, buf, len)) == -1) + return -1; + + if (lseek(fd, old, SEEK_SET) == -1) return -1; - return read(fd, buf, len); + return rv; } |
