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/* ISC license. */
#include <skalibs/sysdeps.h>
#ifdef SKALIBS_HASFLOCK
#include <skalibs/nonposix.h>
#include <errno.h>
#include <sys/file.h>
#include <skalibs/djbunix.h>
int lock_shnb (int fd)
{
int r ;
do r = flock(fd, LOCK_SH | LOCK_NB) ;
while ((r == -1) && (errno == EINTR)) ;
return r ;
}
#else
#include <unistd.h>
#include <errno.h>
#include <skalibs/djbunix.h>
int lock_shnb (int fd)
{
int r ;
do r = lockf(fd, F_TLOCK, 0) ;
while ((r == -1) && (errno == EINTR)) ;
if ((r == -1) && (errno == EACCES)) errno = EAGAIN ;
return r ;
}
#endif
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