*
* Copyright (C) 2000,2001 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/* BB_AUDIT SUSv3 (virtually) compliant -- uses nicer GNU format for -l. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/cmp.html */
-/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
- *
- * Original version majorly reworked for SUSv3 compliance, bug fixes, and
- * size optimizations. Changes include:
- * 1) Now correctly distinguishes between errors and actual file differences.
- * 2) Proper handling of '-' args.
- * 3) Actual error checking of i/o.
- * 4) Accept SUSv3 -l option. Note that we use the slightly nicer gnu format
- * in the '-l' case.
- */
+//usage:#define cmp_trivial_usage
+//usage: "[-l] [-s] FILE1 [FILE2" IF_DESKTOP(" [SKIP1 [SKIP2]]") "]"
+//usage:#define cmp_full_usage "\n\n"
+//usage: "Compare FILE1 with FILE2 (or stdin)\n"
+//usage: "\n -l Write the byte numbers (decimal) and values (octal)"
+//usage: "\n for all differing bytes"
+//usage: "\n -s Quiet"
#include "libbb.h"
static const char fmt_eof[] ALIGN1 = "cmp: EOF on %s\n";
-static const char fmt_differ[] ALIGN1 = "%s %s differ: char %"OFF_FMT"d, line %d\n";
-// This fmt_l_opt uses gnu-isms. SUSv3 would be "%.0s%.0s%"OFF_FMT"d %o %o\n"
-static const char fmt_l_opt[] ALIGN1 = "%.0s%.0s%"OFF_FMT"d %3o %3o\n";
+static const char fmt_differ[] ALIGN1 = "%s %s differ: char %"OFF_FMT"u, line %u\n";
+// This fmt_l_opt uses gnu-isms. SUSv3 would be "%.0s%.0s%"OFF_FMT"u %o %o\n"
+static const char fmt_l_opt[] ALIGN1 = "%.0s%.0s%"OFF_FMT"u %3o %3o\n";
static const char opt_chars[] ALIGN1 = "sl";
#define CMP_OPT_s (1<<0)
#define CMP_OPT_l (1<<1)
int cmp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int cmp_main(int argc ATTRIBUTE_UNUSED, char **argv)
+int cmp_main(int argc UNUSED_PARAM, char **argv)
{
FILE *fp1, *fp2, *outfile = stdout;
const char *filename1, *filename2 = "-";
- USE_DESKTOP(off_t skip1 = 0, skip2 = 0;)
- off_t char_pos = 0;
+ off_t skip1 = 0, skip2 = 0, char_pos = 0;
int line_pos = 1; /* Hopefully won't overflow... */
const char *fmt;
int c1, c2;
unsigned opt;
int retval = 0;
- xfunc_error_retval = 2; /* 1 is returned if files are different. */
-
opt_complementary = "-1"
- USE_DESKTOP(":?4")
- SKIP_DESKTOP(":?2")
+ IF_DESKTOP(":?4")
+ IF_NOT_DESKTOP(":?2")
":l--s:s--l";
opt = getopt32(argv, opt_chars);
argv += optind;
filename1 = *argv;
- fp1 = xfopen_stdin(filename1);
-
if (*++argv) {
filename2 = *argv;
-#if ENABLE_DESKTOP
- if (*++argv) {
+ if (ENABLE_DESKTOP && *++argv) {
skip1 = XATOOFF(*argv);
if (*++argv) {
skip2 = XATOOFF(*argv);
}
}
-#endif
}
+ xfunc_error_retval = 2; /* missing file results in exitcode 2 */
+ if (opt & CMP_OPT_s)
+ logmode = 0; /* -s suppresses open error messages */
+ fp1 = xfopen_stdin(filename1);
fp2 = xfopen_stdin(filename2);
if (fp1 == fp2) { /* Paranoia check... stdin == stdin? */
/* Note that we don't bother reading stdin. Neither does gnu wc.
*/
return 0;
}
+ logmode = LOGMODE_STDIO;
if (opt & CMP_OPT_l)
fmt = fmt_l_opt;
else
fmt = fmt_differ;
-#if ENABLE_DESKTOP
- while (skip1) { getc(fp1); skip1--; }
- while (skip2) { getc(fp2); skip2--; }
-#endif
+ if (ENABLE_DESKTOP) {
+ while (skip1) { getc(fp1); skip1--; }
+ while (skip2) { getc(fp2); skip2--; }
+ }
do {
c1 = getc(fp1);
c2 = getc(fp2);
outfile = stderr;
/* There may have been output to stdout (option -l), so
* make sure we fflush before writing to stderr. */
- xfflush_stdout();
+ fflush_all();
}
if (!(opt & CMP_OPT_s)) {
if (opt & CMP_OPT_l) {