diff options
Diffstat (limited to 'file_cmds/cksum/cksum.c')
| -rw-r--r-- | file_cmds/cksum/cksum.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/file_cmds/cksum/cksum.c b/file_cmds/cksum/cksum.c new file mode 100644 index 0000000..ae6a7ed --- /dev/null +++ b/file_cmds/cksum/cksum.c @@ -0,0 +1,148 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * James W. Williams of NASA Goddard Space Flight Center. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +#ifndef lint +__used static const char copyright[] = +"@(#) Copyright (c) 1991, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)cksum.c 8.2 (Berkeley) 4/28/95"; +#endif +#endif /* not lint */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD: src/usr.bin/cksum/cksum.c,v 1.17 2003/03/13 23:32:28 robert Exp $"); + +#include <sys/types.h> + +#include <err.h> +#include <fcntl.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "extern.h" + +static void usage(void); + +int +main(int argc, char **argv) +{ + uint32_t val; + int ch, fd, rval; + off_t len; + char *fn, *p; + int (*cfncn)(int, uint32_t *, off_t *); + void (*pfncn)(char *, u_int32_t, off_t); + + cfncn=NULL; + + if(*argv) { + if ((p = rindex(argv[0], '/')) == NULL) + p = argv[0]; + else + ++p; + if (!strcmp(p, "sum")) { + cfncn = csum1; + pfncn = psum1; + ++argv; + } + } + + if(!cfncn) { + cfncn = crc; + pfncn = pcrc; + + while ((ch = getopt(argc, argv, "o:")) != -1) + switch (ch) { + case 'o': + if (!strcmp(optarg, "1")) { + cfncn = csum1; + pfncn = psum1; + } else if (!strcmp(optarg, "2")) { + cfncn = csum2; + pfncn = psum2; + } else if (!strcmp(optarg, "3")) { + cfncn = crc32; + pfncn = pcrc; + } else { + warnx("illegal argument to -o option"); + usage(); + } + break; + case '?': + default: + usage(); + } +// argc -= optind; + argv += optind; + } + + fd = STDIN_FILENO; + fn = NULL; + rval = 0; + do { + if (*argv) { + fn = *argv++; + if ((fd = open(fn, O_RDONLY, 0)) < 0) { + warn("%s", fn); + rval = 1; + continue; + } + } + if (cfncn(fd, &val, &len)) { + warn("%s", fn ? fn : "stdin"); + rval = 1; + } else + pfncn(fn, val, len); + (void)close(fd); + } while (*argv); + exit(rval); +} + +static void +usage(void) +{ + (void)fprintf(stderr, "usage: cksum [-o 1 | 2 | 3] [file ...]\n"); + (void)fprintf(stderr, " sum [file ...]\n"); + exit(1); +} |