*
* 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.
- */
-
#include "libbb.h"
-static FILE *cmp_xfopen_input(const char *filename)
-{
- FILE *fp;
-
- fp = fopen_or_warn_stdin(filename);
- if (fp)
- return fp;
- xfunc_die(); /* We already output an error message. */
-}
-
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);
-int cmp_main(int argc, char **argv)
+int cmp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+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;
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(argc, argv, opt_chars);
+ opt = getopt32(argv, opt_chars);
argv += optind;
filename1 = *argv;
- fp1 = cmp_xfopen_input(filename1);
+ 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
}
- fp2 = cmp_xfopen_input(filename2);
+ fp2 = xfopen_stdin(filename2);
if (fp1 == fp2) { /* Paranoia check... stdin == stdin? */
/* Note that we don't bother reading stdin. Neither does gnu wc.
* But perhaps we should, so that other apps down the chain don't
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) {