diff options
Diffstat (limited to 'release/src/router/busybox/coreutils/cmp.c')
| -rw-r--r-- | release/src/router/busybox/coreutils/cmp.c | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/release/src/router/busybox/coreutils/cmp.c b/release/src/router/busybox/coreutils/cmp.c deleted file mode 100644 index 43dbc842..00000000 --- a/release/src/router/busybox/coreutils/cmp.c +++ /dev/null @@ -1,152 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * Mini cmp implementation for busybox - * - * Copyright (C) 2000,2001 by Matt Kraai <kraai@alumni.carnegiemellon.edu> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -/* 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 distingusishes 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 <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include "busybox.h" - -static FILE *cmp_xfopen_input(const char *filename) -{ - FILE *fp; - - if ((fp = bb_wfopen_input(filename)) != NULL) { - return fp; - } - - exit(bb_default_error_retval); /* We already output an error message. */ -} - -static const char fmt_eof[] = "cmp: EOF on %s\n"; -static const char fmt_differ[] = "%s %s differ: char %d, line %d\n"; -#if 0 -static const char fmt_l_opt[] = "%.0s%.0s%d %o %o\n"; /* SUSv3 format */ -#else -static const char fmt_l_opt[] = "%.0s%.0s%d %3o %3o\n"; /* nicer gnu format */ -#endif - -static const char opt_chars[] = "sl"; - -enum { - OPT_s = 1, - OPT_l = 2 -}; - -int cmp_main(int argc, char **argv) -{ - FILE *fp1, *fp2, *outfile = stdout; - const char *filename1, *filename2; - const char *fmt; - int c1, c2, char_pos, line_pos; - int opt_flags; - int exit_val = 0; - - bb_default_error_retval = 2; /* 1 is returned if files are different. */ - - opt_flags = bb_getopt_ulflags(argc, argv, opt_chars); - - if ((opt_flags == 3) || (((unsigned int)(--argc - optind)) > 1)) { - bb_show_usage(); - } - - fp1 = cmp_xfopen_input(filename1 = *(argv += optind)); - - filename2 = "-"; - if (*++argv) { - filename2 = *argv; - } - fp2 = cmp_xfopen_input(filename2); - - if (fp1 == fp2) { /* Paranioa 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 -)'. - */ - return 0; - } - - fmt = fmt_differ; - if (opt_flags == OPT_l) { - fmt = fmt_l_opt; - } - - char_pos = 0; - line_pos = 1; - do { - c1 = getc(fp1); - c2 = getc(fp2); - ++char_pos; - if (c1 != c2) { /* Remember -- a read error may have occurred. */ - exit_val = 1; /* But assume the files are different for now. */ - if (c2 == EOF) { - /* We know that fp1 isn't at EOF or in an error state. But to - * save space below, things are setup to expect an EOF in fp1 - * if an EOF occurred. So, swap things around. - */ - fp1 = fp2; - filename1 = filename2; - c1 = c2; - } - if (c1 == EOF) { - bb_xferror(fp1, filename1); - fmt = fmt_eof; /* Well, no error, so it must really be EOF. */ - outfile = stderr; - /* There may have been output to stdout (option -l), so - * make sure we fflush before writing to stderr. */ - bb_xfflush_stdout(); - } - if (opt_flags != OPT_s) { - if (opt_flags == OPT_l) { - line_pos = c1; /* line_pos is unused in the -l case. */ - } - bb_fprintf(outfile, fmt, filename1, filename2, char_pos, line_pos, c2); - if (opt_flags) { /* This must be -l since not -s. */ - /* If we encountered and EOF, the while check will catch it. */ - continue; - } - } - break; - } - if (c1 == '\n') { - ++line_pos; - } - } while (c1 != EOF); - - bb_xferror(fp1, filename1); - bb_xferror(fp2, filename2); - - bb_fflush_stdout_and_exit(exit_val); -} |