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