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#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#ifdef linux
#include <getopt.h>
#endif
#include <fcntl.h>
static void usage(int exval);
static void fatal(char *);
int
main(int argc, char **argv)
{
unsigned long start = 0, len = 0;
struct flock fl;
int c, fd, cmd, typ;
char *fname;
typ = F_RDLCK;
cmd = F_SETLK;
while ((c = getopt(argc, argv, "bhrtw")) != EOF) {
switch (c) {
case 'h':
usage(0);
case 'r':
cmd = F_SETLK;
typ = F_RDLCK;
break;
case 'w':
cmd = F_SETLK;
typ = F_WRLCK;
break;
case 'b':
cmd = F_SETLKW;
typ = F_WRLCK;
break;
case 't':
cmd = F_GETLK;
break;
case '?':
usage(1);
}
}
argc -= optind;
argv += optind;
if (argc <= 0 || argc > 3)
usage(1);
fname = argv[0];
/* printf("TP\n"); */
if (argc > 1)
start = atoi(argv[1]);
/* printf("TP\n"); */
if (argc > 2)
len = atoi(argv[2]);
/* printf("TP\n"); */
if ((fd = open(fname, O_RDWR, 0644)) < 0)
fatal(fname);
/* printf("TP1\n"); */
fl.l_type = typ;
fl.l_whence = 0;
fl.l_start = start;
fl.l_len = len;
if (fcntl(fd, cmd, &fl) < 0)
fatal("fcntl");
printf("fcntl: ok\n");
/* printf("TP2\n"); */
if (cmd == F_GETLK) {
if (fl.l_type == F_UNLCK) {
printf("%s: no conflicting lock\n", fname);
} else {
printf("%s: conflicting lock by %d on (%lld;%lld)\n",
fname, fl.l_pid, fl.l_start, fl.l_len);
}
return 0;
}
/* printf("TP3\n"); */
pause();
return 0;
}
static void
usage(int exval)
{
fprintf(stderr, "usage: testlk filename [start [len]]\n");
exit(exval);
}
static void
fatal(char *msg)
{
perror(msg);
exit(2);
}
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