From 5fd83771641d15c418f747bd343ba6738d3875f7 Mon Sep 17 00:00:00 2001 From: Cameron Katri Date: Sun, 9 May 2021 14:20:58 -0400 Subject: Import macOS userland adv_cmds-176 basic_cmds-55 bootstrap_cmds-116.100.1 developer_cmds-66 diskdev_cmds-667.40.1 doc_cmds-53.60.1 file_cmds-321.40.3 mail_cmds-35 misc_cmds-34 network_cmds-606.40.1 patch_cmds-17 remote_cmds-63 shell_cmds-216.60.1 system_cmds-880.60.2 text_cmds-106 --- file_cmds/compress/compress.c | 467 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 467 insertions(+) create mode 100644 file_cmds/compress/compress.c (limited to 'file_cmds/compress/compress.c') diff --git a/file_cmds/compress/compress.c b/file_cmds/compress/compress.c new file mode 100644 index 0000000..26da7fa --- /dev/null +++ b/file_cmds/compress/compress.c @@ -0,0 +1,467 @@ +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * 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. + * 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 +#ifndef lint +__used static const char copyright[] = +"@(#) Copyright (c) 1992, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif + +#if 0 +#ifndef lint +static char sccsid[] = "@(#)compress.c 8.2 (Berkeley) 1/7/94"; +#endif +#endif + +#include +__FBSDID("$FreeBSD: src/usr.bin/compress/compress.c,v 1.23 2010/12/11 08:32:16 joel Exp $"); + +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "zopen.h" + +void compress(const char *, const char *, int); +void cwarn(const char *, ...) __printflike(1, 2); +void cwarnx(const char *, ...) __printflike(1, 2); +void decompress(const char *, const char *, int); +int permission(const char *); +void setfile(const char *, struct stat *); +void usage(int); + +int eval, force, verbose, cat; + +int +main(int argc, char *argv[]) +{ + enum {COMPRESS, DECOMPRESS} style; + size_t len; + int bits, ch; + char *p, newname[MAXPATHLEN]; + + if (argc < 1) + usage(1); + cat = 0; + if ((p = rindex(argv[0], '/')) == NULL) + p = argv[0]; + else + ++p; + if (!strcmp(p, "uncompress")) + style = DECOMPRESS; + else if (!strcmp(p, "compress")) + style = COMPRESS; + else if (!strcmp(p, "zcat")) { + cat = 1; + style = DECOMPRESS; + } else + errx(1, "unknown program name"); + + bits = 0; + while ((ch = getopt(argc, argv, "b:cdfv")) != -1) + switch(ch) { + case 'b': + bits = strtol(optarg, &p, 10); + if (*p) + errx(1, "illegal bit count -- %s", optarg); + break; + case 'c': + cat = 1; + break; + case 'd': /* Backward compatible. */ + style = DECOMPRESS; + break; + case 'f': + force = 1; + break; + case 'v': + verbose = 1; + break; + case '?': + default: + usage(style == COMPRESS); + } + argc -= optind; + argv += optind; + + if (argc == 0) { + cat = 1; + switch(style) { + case COMPRESS: + (void)compress("/dev/stdin", "/dev/stdout", bits); + break; + case DECOMPRESS: + (void)decompress("/dev/stdin", "/dev/stdout", bits); + break; + } + exit (eval); + } + + /* + * The UNIX standard requires that `uncompress -c` be able to have multiple file parameters given. + */ + + for (; *argv; ++argv) + switch(style) { + case COMPRESS: + if (strcmp(*argv, "-") == 0) { + cat = 1; + compress("/dev/stdin", "/dev/stdout", bits); + break; + } else if (cat) { + compress(*argv, "/dev/stdout", bits); + break; + } + if ((p = rindex(*argv, '.')) != NULL && + !strcmp(p, ".Z")) { + cwarnx("%s: name already has trailing .Z", + *argv); + break; + } + len = strlen(*argv); + if (len > sizeof(newname) - 3) { + cwarnx("%s: name too long", *argv); + break; + } + memmove(newname, *argv, len); + newname[len] = '.'; + newname[len + 1] = 'Z'; + newname[len + 2] = '\0'; + compress(*argv, newname, bits); + break; + case DECOMPRESS: + if (strcmp(*argv, "-") == 0) { + cat = 1; + decompress("/dev/stdin", "/dev/stdout", bits); + break; + } + len = strlen(*argv); + if ((p = rindex(*argv, '.')) == NULL || + strcmp(p, ".Z")) { + if (len > sizeof(newname) - 3) { + cwarnx("%s: name too long", *argv); + break; + } + memmove(newname, *argv, len); + newname[len] = '.'; + newname[len + 1] = 'Z'; + newname[len + 2] = '\0'; + decompress(newname, + cat ? "/dev/stdout" : *argv, bits); + } else { + if (len - 2 > sizeof(newname) - 1) { + cwarnx("%s: name too long", *argv); + break; + } + memmove(newname, *argv, len - 2); + newname[len - 2] = '\0'; + decompress(*argv, + cat ? "/dev/stdout" : newname, bits); + } + break; + } + exit (eval); +} + +void +compress(const char *in, const char *out, int bits) +{ + size_t nr; + struct stat isb, sb; + FILE *ifp = NULL, *ofp = NULL; + int exists, isreg, oreg; + u_char buf[1024]; + + exists = !stat(out, &sb); + if (!force && exists && S_ISREG(sb.st_mode) && !cat && !permission(out)) { + cwarnx("%s already exists", out); + return; + } + isreg = oreg = !exists || S_ISREG(sb.st_mode); + + if ((ifp = fopen(in, "r")) == NULL) { + cwarn("%s", in); + return; + } + if (stat(in, &isb)) { /* DON'T FSTAT! */ + cwarn("%s", in); + goto err; + } + if (!S_ISREG(isb.st_mode)) + isreg = 0; + + if ((ofp = zopen(out, "w", bits)) == NULL) { + cwarn("%s", out); + goto err; + } + while ((nr = fread(buf, 1, sizeof(buf), ifp)) != 0) + if (fwrite(buf, 1, nr, ofp) != nr) { + cwarn("%s", out); + goto err; + } + + if (ferror(ifp) || fclose(ifp)) { + cwarn("%s", in); + goto err; + } + ifp = NULL; + + if (fclose(ofp)) { + cwarn("%s", out); + goto err; + } + ofp = NULL; + + if (!cat && isreg) { + if (stat(out, &sb)) { + cwarn("%s", out); + goto err; + } + + if (!force && sb.st_size >= isb.st_size) { + if (verbose) + (void)fprintf(stderr, "%s: file would grow; left unmodified\n", + in); + eval = 2; + if (unlink(out)) + cwarn("%s", out); + goto err; + } + + setfile(out, &isb); + + if (unlink(in)) + cwarn("%s", in); + + if (verbose) { + (void)fprintf(stderr, "%s: ", out); + if (isb.st_size > sb.st_size) + (void)fprintf(stderr, "%.0f%% compression\n", + ((float)sb.st_size / isb.st_size) * 100.0); + else + (void)fprintf(stderr, "%.0f%% expansion\n", + ((float)isb.st_size / sb.st_size) * 100.0); + } + } + return; + +err: if (ofp) { + if (!cat && oreg) + (void)unlink(out); + (void)fclose(ofp); + } + if (ifp) + (void)fclose(ifp); +} + +void +decompress(const char *in, const char *out, int bits) +{ + size_t nr; + struct stat sb; + FILE *ifp, *ofp; + int exists, isreg, oreg; + u_char buf[1024]; + + exists = !stat(out, &sb); + if (!force && exists && S_ISREG(sb.st_mode) && !cat && !permission(out)) { + cwarnx("%s already exists", out); + return; + } + isreg = oreg = !exists || S_ISREG(sb.st_mode); + + ofp = NULL; + if ((ifp = zopen(in, "r", bits)) == NULL) { + cwarn("%s", in); + return; + } + if (stat(in, &sb)) { + cwarn("%s", in); + goto err; + } + if (!S_ISREG(sb.st_mode)) + isreg = 0; + + /* + * Try to read the first few uncompressed bytes from the input file + * before blindly truncating the output file. + */ + if ((nr = fread(buf, 1, sizeof(buf), ifp)) == 0) { + cwarn("%s", in); + (void)fclose(ifp); + return; + } + if ((ofp = fopen(out, "w")) == NULL || + (nr != 0 && fwrite(buf, 1, nr, ofp) != nr)) { + cwarn("%s", out); + (void)fclose(ifp); + return; + } + + while ((nr = fread(buf, 1, sizeof(buf), ifp)) != 0) + if (fwrite(buf, 1, nr, ofp) != nr) { + cwarn("%s", out); + goto err; + } + + if (ferror(ifp) || fclose(ifp)) { + cwarn("%s", in); + goto err; + } + ifp = NULL; + + if (fclose(ofp)) { + cwarn("%s", out); + goto err; + } + + if (!cat && isreg) { + setfile(out, &sb); + + if (unlink(in)) + cwarn("%s", in); + if (verbose) { + struct stat isb = sb; + stat(out, &sb); + (void)fprintf(stderr, "%s: ", out); + if (isb.st_size > sb.st_size) + (void)fprintf(stderr, "%.0f%% compression\n", + ((float)sb.st_size / isb.st_size) * 100.0); + else + (void)fprintf(stderr, "%.0f%% expansion\n", + ((float)isb.st_size / sb.st_size) * 100.0); + } + } + return; + +err: if (ofp) { + if (!cat && oreg) + (void)unlink(out); + (void)fclose(ofp); + } + if (ifp) + (void)fclose(ifp); +} + +void +setfile(const char *name, struct stat *fs) +{ + static struct timeval tv[2]; + + fs->st_mode &= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO; + + TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atimespec); + TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtimespec); + if (utimes(name, tv)) + cwarn("utimes: %s", name); + + /* + * Changing the ownership probably won't succeed, unless we're root + * or POSIX_CHOWN_RESTRICTED is not set. Set uid/gid before setting + * the mode; current BSD behavior is to remove all setuid bits on + * chown. If chown fails, lose setuid/setgid bits. + */ + if (chown(name, fs->st_uid, fs->st_gid)) { + if (errno != EPERM) + cwarn("chown: %s", name); + fs->st_mode &= ~(S_ISUID|S_ISGID); + } + if (chmod(name, fs->st_mode) && errno != ENOTSUP) + cwarn("chmod: %s", name); + + if (chflags(name, fs->st_flags) && errno != ENOTSUP) + cwarn("chflags: %s", name); +} + +int +permission(const char *fname) +{ + int ch, first; + char resp[] = {'\0', '\0'}; + + if (!isatty(fileno(stderr))) + return (0); + (void)fprintf(stderr, "overwrite %s? ", fname); + + /* Load user specified locale */ + setlocale(LC_MESSAGES, ""); + + first = ch = getchar(); + while (ch != '\n' && ch != EOF) + ch = getchar(); + + /* only care about first character */ + resp[0] = first; + + return (rpmatch(resp) == 1); +} + +void +usage(int iscompress) +{ + if (iscompress) + (void)fprintf(stderr, + "usage: compress [-cfv] [-b bits] [file ...]\n"); + else + (void)fprintf(stderr, + "usage: uncompress [-cfv] [file ...]\n"); + exit(1); +} + +void +cwarnx(const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + vwarnx(fmt, ap); + va_end(ap); + eval = 1; +} + +void +cwarn(const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + vwarn(fmt, ap); + va_end(ap); + eval = 1; +} -- cgit v1.2.3-56-ge451