version 1.21, 2006/05/09 17:03:51 |
version 1.22, 2006/05/09 17:44:53 |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
*/ |
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#include <err.h> |
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#include <limits.h> |
#include <limits.h> |
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#include <errno.h> |
#include <stdio.h> |
#include <stdio.h> |
#include <stdlib.h> |
#include <stdlib.h> |
#include <string.h> |
#include <string.h> |
#include <unistd.h> |
#include <unistd.h> |
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__dead void usage(void); |
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int |
int |
main(int argc, char *argv[]) |
main(int argc, char *argv[]) |
{ |
{ |
int ch, n, fflag = 0, nflag = 0; |
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char buf[PATH_MAX]; |
char buf[PATH_MAX]; |
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int n, ch, nflag = 0, fflag = 0; |
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extern int optind; |
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while ((ch = getopt(argc, argv, "fn")) != -1) |
while ((ch = getopt(argc, argv, "fn")) != -1) |
switch (ch) { |
switch (ch) { |
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nflag = 1; |
nflag = 1; |
break; |
break; |
default: |
default: |
usage(); |
(void)fprintf(stderr, |
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"usage: readlink [-n] [-f] symlink\n"); |
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exit(1); |
} |
} |
argc -= optind; |
argc -= optind; |
argv += optind; |
argv += optind; |
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if (argc != 1) |
if (argc != 1) { |
usage(); |
fprintf(stderr, "usage: readlink [-n] [-f] symlink\n"); |
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exit(1); |
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} |
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if (strlen(argv[0]) > PATH_MAX - 1) |
n = strlen(argv[0]); |
errx(1, "filename longer than PATH_MAX-1 (%d)", |
if (n > PATH_MAX - 1) { |
PATH_MAX - 1); |
fprintf(stderr, |
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"readlink: filename longer than PATH_MAX-1 (%d)\n", |
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PATH_MAX - 1); |
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exit(1); |
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} |
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if (fflag) { |
if (fflag) |
if (realpath(argv[0], buf) == NULL) |
realpath(argv[0], buf); |
err(1, "%s", argv[0]); |
else { |
} else { |
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if ((n = readlink(argv[0], buf, sizeof buf-1)) < 0) |
if ((n = readlink(argv[0], buf, sizeof buf-1)) < 0) |
err(1, "%s", argv[0]); |
exit(1); |
buf[n] = '\0'; |
buf[n] = '\0'; |
} |
} |
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if (!nflag) |
if (!nflag) |
putchar('\n'); |
putchar('\n'); |
exit(0); |
exit(0); |
} |
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void |
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usage(void) |
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{ |
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extern char *__progname; |
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fprintf(stderr, "usage: %s [-fn] symlink\n", __progname); |
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exit(1); |
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} |
} |