1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
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23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
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43 #include <sys/types.h>
48 void chd_lock_unlock(int);
51 int main(int argc, char **argv)
57 fprintf(stderr, "\nUSAGE: flock_test filepath\n");
60 strncpy(fname, argv[1], 1023);
62 fd = open(fname, O_RDWR|O_CREAT, (mode_t)0666);
64 fprintf(stderr, "flock_test: failed to open %s : ", fname);
68 if (flock(fd, LOCK_EX | LOCK_NB) == -1) {
69 fprintf(stderr, "flock_test: parent attempt to lock %s failed : ", \
77 fprintf(stderr, "flock_test: fork failed : ");
85 if ((cfd = open(fname, O_RDWR)) == -1) {
86 fprintf(stderr, "flock_test child (%d) cannot open %s: ", \
91 if(flock(cfd, LOCK_EX | LOCK_NB) != -1) {
92 fprintf(stderr, "flock_test child (%d): %s not yet locked : ", \
96 if(flock(fd, LOCK_UN) == -1) {
97 fprintf(stderr, "flock_test child (%d): cannot unlock %s: ", \
102 if(flock(cfd, LOCK_EX | LOCK_NB) == -1 ) {
104 "flock_test: child (%d) cannot re-lock %s after unlocking : ", \
113 waitpid(pid, &rc, 0);
116 if (WIFEXITED(rc) && WEXITSTATUS(rc) != 0) {
117 fprintf(stderr, "flock_test: child (%d) exit code = %d\n", \
118 pid, WEXITSTATUS(rc));