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| [9] | 1 |
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| 2 | /* Library routines
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| 3 | *
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| 4 | * Porting to Minix 2.0.0
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| 5 | * Author: Giovanni Falzoni <gfalzoni@pointest.com>
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| 6 | *
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| 7 | * $Id: flock.c,v 1.1 2005/10/31 14:31:05 beng Exp $
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| 8 | */
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| 9 | #include <sys/types.h>
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| 10 | #include <fcntl.h>
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| 11 | #include <string.h>
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| 12 | #include <errno.h>
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| 13 | #include <unistd.h>
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| 14 |
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| 15 | /*
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| 16 | * Name: int flock(int fd, int mode);
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| 17 | * Function: Implements the flock function in Minix.
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| 18 | */
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| 19 | int flock(int fd, int mode)
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| 20 | {
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| 21 | struct flock lck;
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| 22 | register int retcode;
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| 23 |
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| 24 | memset((void *) &lck, 0, sizeof(struct flock));
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| 25 | lck.l_type = mode & ~LOCK_NB;
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| 26 | lck.l_pid = getpid();
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| 27 | if ((retcode = fcntl(fd, mode & LOCK_NB ? F_SETLK : F_SETLKW, &lck)) < 0 && errno == EAGAIN)
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| 28 | errno = EWOULDBLOCK;
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| 29 | return retcode;
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| 30 | }
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| 31 |
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| 32 | /** flock.c **/
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