minix/lib/libc/sys-minix/flock.c
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

34 lines
706 B
C

/* Library routines
*
* Porting to Minix 2.0.0
* Author: Giovanni Falzoni <gfalzoni@pointest.com>
*/
#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#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 **/