minix/lib/other/flock.c
2005-10-31 14:31:05 +00:00

32 lines
653 B
C

/* Library routines
*
* Porting to Minix 2.0.0
* Author: Giovanni Falzoni <gfalzoni@pointest.com>
*
* $Id$
*/
#include <sys/types.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
/*
* Name: int flock(int fd, int mode);
* Function: Implements the flock function in Minix.
*/
int flock(int fd, int mode)
{
struct flock lck;
register int retcode;
memset((void *) &lck, 0, sizeof(struct flock));
lck.l_type = mode & ~LOCK_NB;
lck.l_pid = getpid();
if ((retcode = fcntl(fd, mode & LOCK_NB ? F_SETLK : F_SETLKW, &lck)) < 0 && errno == EAGAIN)
errno = EWOULDBLOCK;
return retcode;
}
/** flock.c **/