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8 * modification, are permitted provided that the following conditions
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31 * $FreeBSD: head/usr.bin/cmp/cmp.c 216370 2010-12-11 08:32:16Z joel $
33 * @(#) Copyright (c) 1987, 1990, 1993, 1994 The Regents of the University of California. All rights reserved.
34 * @(#)cmp.c 8.3 (Berkeley) 4/2/94
37 #include <sys/types.h>
53 bool lflag
, sflag
, xflag
, zflag
;
55 static const struct option long_opts
[] =
57 {"verbose", no_argument
, NULL
, 'l'},
58 {"silent", no_argument
, NULL
, 's'},
59 {"quiet", no_argument
, NULL
, 's'},
60 {NULL
, no_argument
, NULL
, 0}
63 static void usage(void);
66 main(int argc
, char *argv
[])
70 int ch
, fd1
, fd2
, oflag
;
72 const char *file1
, *file2
;
75 while ((ch
= getopt_long(argc
, argv
, "+hlsxz", long_opts
, NULL
)) != -1)
77 case 'h': /* Don't follow symlinks */
80 case 'l': /* print all differences */
83 case 's': /* silent run */
86 case 'x': /* hex output */
90 case 'z': /* compare size first */
101 errx(ERR_EXIT
, "specifying -s with -l or -x is not permitted");
103 if (argc
< 2 || argc
> 4)
106 /* Backward compatibility -- handle "-" meaning stdin. */
108 if (strcmp(file1
= argv
[0], "-") == 0) {
112 } else if ((fd1
= open(file1
, oflag
, 0)) < 0 && errno
!= EMLINK
) {
114 err(ERR_EXIT
, "%s", file1
);
118 if (strcmp(file2
= argv
[1], "-") == 0) {
121 "standard input may only be specified once");
125 } else if ((fd2
= open(file2
, oflag
, 0)) < 0 && errno
!= EMLINK
) {
127 err(ERR_EXIT
, "%s", file2
);
132 skip1
= argc
> 2 ? strtol(argv
[2], NULL
, 0) : 0;
133 skip2
= argc
== 4 ? strtol(argv
[3], NULL
, 0) : 0;
135 if (sflag
&& skip1
== 0 && skip2
== 0)
140 c_link(file1
, skip1
, file2
, skip2
);
143 errx(ERR_EXIT
, "%s: Not a symbolic link", file2
);
146 } else if (fd2
== -1) {
148 errx(ERR_EXIT
, "%s: Not a symbolic link", file1
);
154 if (fstat(fd1
, &sb1
)) {
156 err(ERR_EXIT
, "%s", file1
);
160 if (!S_ISREG(sb1
.st_mode
))
163 if (fstat(fd2
, &sb2
)) {
165 err(ERR_EXIT
, "%s", file2
);
169 if (!S_ISREG(sb2
.st_mode
))
175 c_special(fd1
, file1
, skip1
, fd2
, file2
, skip2
);
177 if (zflag
&& sb1
.st_size
!= sb2
.st_size
) {
179 (void) printf("%s %s differ: size\n",
183 c_regular(fd1
, file1
, skip1
, sb1
.st_size
,
184 fd2
, file2
, skip2
, sb2
.st_size
);
193 (void)fprintf(stderr
,
194 "usage: cmp [-l | -s | -x] [-hz] file1 file2 [skip1 [skip2]]\n");