43 lines
571 B
C
43 lines
571 B
C
#include <errno.h>
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lockf(fildes, mode, size)
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long size;
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{
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struct {
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short type, whence; long start, end; short pid;
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} x;
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int i = 8;
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extern int errno;
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x.type = 2;
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x.whence = 1;
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x.start = 0;
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x.end = size;
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switch(mode) {
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case 0:
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x.type = 3;
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break;
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case 1:
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i = 9;
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break;
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case 2:
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break;
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case 3:
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if (fcntl(fildes,7,&x) == -1) {
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return -1;
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}
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if (x.type == 3) {
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return 0;
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}
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errno = EACCES;
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return -1;
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default:
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errno = EINVAL;
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return -1;
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}
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if (fcntl(fildes,i,&x) == -1) {
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if (errno = 79) {
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errno = 78;
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}
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return -1;
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}
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}
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