aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--coreutils/cmp.c39
-rw-r--r--include/usage.h2
2 files changed, 29 insertions, 12 deletions
diff --git a/coreutils/cmp.c b/coreutils/cmp.c
index 0aebd4b4d..cff118279 100644
--- a/coreutils/cmp.c
+++ b/coreutils/cmp.c
@@ -34,9 +34,9 @@ static FILE *cmp_xfopen_input(const char * const filename)
}
static const char fmt_eof[] = "cmp: EOF on %s\n";
-static const char fmt_differ[] = "%s %s differ: char %d, line %d\n";
-// This fmt_l_opt uses gnu-isms. SUSv3 would be "%.0s%.0s%d %o %o\n"
-static const char fmt_l_opt[] = "%.0s%.0s%d %3o %3o\n";
+static const char fmt_differ[] = "%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[] = "%.0s%.0s%"OFF_FMT"d %3o %3o\n";
static const char opt_chars[] = "sl";
#define CMP_OPT_s (1<<0)
@@ -47,27 +47,40 @@ int cmp_main(int argc, char **argv)
{
FILE *fp1, *fp2, *outfile = stdout;
const char *filename1, *filename2 = "-";
+ USE_DESKTOP(off_t skip1 = 0, skip2 = 0;)
+ off_t char_pos = 0;
+ int line_pos = 1; /* Hopefully won't overflow... */
const char *fmt;
- int c1, c2, char_pos = 0, line_pos = 1;
+ 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")
+ ":l--s:s--l";
opt = getopt32(argc, argv, opt_chars);
+ argv += optind;
- if (((opt & (CMP_OPT_s|CMP_OPT_l)) == (CMP_OPT_s|CMP_OPT_l))
- || (((unsigned int)(--argc - optind)) > 1))
- bb_show_usage();
-
- fp1 = cmp_xfopen_input(filename1 = *(argv += optind));
+ filename1 = *argv;
+ fp1 = cmp_xfopen_input(filename1);
if (*++argv) {
filename2 = *argv;
+#if ENABLE_DESKTOP
+ if (*++argv) {
+ skip1 = XATOOFF(*argv);
+ if (*++argv) {
+ skip2 = XATOOFF(*argv);
+ }
+ }
+#endif
}
- fp2 = cmp_xfopen_input(filename2);
- if (fp1 == fp2) { /* Paranioa check... stdin == stdin? */
+ fp2 = cmp_xfopen_input(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
* get the input. Consider 'echo hello | (cmp - - && cat -)'.
@@ -80,6 +93,10 @@ int cmp_main(int argc, char **argv)
else
fmt = fmt_differ;
+#if ENABLE_DESKTOP
+ while (skip1) { getc(fp1); skip1--; }
+ while (skip2) { getc(fp2); skip2--; }
+#endif
do {
c1 = getc(fp1);
c2 = getc(fp2);
diff --git a/include/usage.h b/include/usage.h
index db38504b8..66f8638f5 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -377,7 +377,7 @@
"Clear screen"
#define cmp_trivial_usage \
- "[-l] [-s] FILE1 [FILE2]"
+ "[-l] [-s] FILE1 [FILE2" USE_DESKTOP(" [SKIP1 [SKIP2]") "]]"
#define cmp_full_usage \
"Compares FILE1 vs stdin if FILE2 is not specified" \
"\n\nOptions:\n" \