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Diffstat (limited to 'usr.bin/uudecode/uudecode.c')
-rw-r--r--usr.bin/uudecode/uudecode.c323
1 files changed, 323 insertions, 0 deletions
diff --git a/usr.bin/uudecode/uudecode.c b/usr.bin/uudecode/uudecode.c
new file mode 100644
index 0000000..977ace2
--- /dev/null
+++ b/usr.bin/uudecode/uudecode.c
@@ -0,0 +1,323 @@
+/* $NetBSD: uudecode.c,v 1.28 2013/01/28 19:50:30 apb Exp $ */
+
+/*-
+ * Copyright (c) 1983, 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.
+ * 3. 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.
+ */
+
+#if HAVE_NBTOOL_CONFIG_H
+#include "nbtool_config.h"
+#endif
+
+#include <sys/cdefs.h>
+#if !defined(lint)
+__COPYRIGHT("@(#) Copyright (c) 1983, 1993\
+ The Regents of the University of California. All rights reserved.");
+#if 0
+static char sccsid[] = "@(#)uudecode.c 8.2 (Berkeley) 4/2/94";
+#endif
+__RCSID("$NetBSD: uudecode.c,v 1.28 2013/01/28 19:50:30 apb Exp $");
+#endif /* not lint */
+
+/*
+ * uudecode [file ...]
+ *
+ * create the specified file, decoding as you go.
+ * used with uuencode.
+ */
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <limits.h>
+#include <locale.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifndef NO_BASE64
+#include <netinet/in.h>
+#include <resolv.h>
+#endif
+
+static int decode(char *);
+__dead static void usage(void);
+static int checkend(const char *, const char *, const char *);
+static int base64_decode(void);
+
+static int base64;
+static const char *inputname;
+
+int
+main(int argc, char *argv[])
+{
+ int ch, rval;
+ char *outputname = NULL;
+
+ setlocale(LC_ALL, "");
+ setprogname(argv[0]);
+
+ while ((ch = getopt(argc, argv, "mo:p")) != -1)
+ switch (ch) {
+ case 'm':
+ base64 = 1;
+ break;
+ case 'o':
+ outputname = optarg;
+ break;
+ case 'p':
+ outputname = __UNCONST("/dev/stdout");
+ break;
+ default:
+ usage();
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (*argv) {
+ rval = 0;
+ do {
+ if (!freopen(inputname = *argv, "r", stdin)) {
+ warn("%s", *argv);
+ rval = 1;
+ continue;
+ }
+ rval |= decode(outputname);
+ } while (*++argv);
+ } else {
+ inputname = "stdin";
+ rval = decode(outputname);
+ }
+ exit(rval);
+}
+
+/*
+ * Decode one file from stdin. If outputname is not NULL
+ * then it overrides the file name embedded in the input data.
+ */
+static int
+decode(char *outputname)
+{
+ struct passwd *pw;
+ int n;
+ char ch, *p;
+ int n1;
+ long mode;
+ char *fn;
+ char buf[MAXPATHLEN];
+
+ /* search for header line */
+ for (;;) {
+ if (!fgets(buf, sizeof(buf), stdin)) {
+ warnx("%s: no \"%s\" line", inputname, base64 ?
+ "begin-base64" : "begin");
+ return(1);
+ }
+ p = buf;
+ if (strncmp(p, "begin-base64", 12) == 0) {
+ base64 = 1;
+ p += 13;
+ break;
+ } else if (strncmp(p, "begin", 5) == 0) {
+ p += 6;
+ break;
+ } else
+ continue;
+ }
+
+ /* must be followed by an octal mode and a space */
+ mode = strtol(p, &fn, 8);
+ if (fn == (p) || !isspace((unsigned char)*fn) || mode==LONG_MIN || mode==LONG_MAX)
+ {
+ warnx("%s: invalid mode on \"%s\" line", inputname,
+ base64 ? "begin-base64" : "begin");
+ return(1);
+ }
+ /* skip whitespace for file name */
+ while (*fn && isspace((unsigned char)*fn)) fn++;
+ if (*fn == 0) {
+ warnx("%s: no filename on \"%s\" line", inputname,
+ base64 ? "begin-base64" : "begin");
+ return(1);
+ }
+ /* zap newline */
+ for (p = fn; *p && *p != '\n'; p++)
+ ;
+ if (*p) *p = 0;
+
+ /* outputname overrides fn */
+ if (outputname)
+ fn = outputname;
+
+ /* handle ~user/file format */
+ if (*fn == '~') {
+ if (!(p = strchr(fn, '/'))) {
+ warnx("%s: illegal ~user.", inputname);
+ return(1);
+ }
+ *p++ = '\0';
+ if (!(pw = getpwnam(fn + 1))) {
+ warnx("%s: no user %s.", inputname, buf);
+ return(1);
+ }
+ n = strlen(pw->pw_dir);
+ n1 = strlen(p);
+ if (n + n1 + 2 > MAXPATHLEN) {
+ warnx("%s: path too long.", inputname);
+ return(1);
+ }
+ /* make space at beginning of buf by moving end of pathname */
+ memmove(buf + n + 1, p, n1 + 1);
+ memmove(buf, pw->pw_dir, n);
+ buf[n] = '/';
+ fn = buf;
+ }
+
+ if (strcmp(fn, "/dev/stdout") == 0 || strcmp(fn, "-") == 0) {
+ /*
+ * POSIX.1-2008 says that both "-" and "/dev/stdout"
+ * refer to standard output when they appear in the file
+ * header, but only "/dev/stdout" refers to standard
+ * output when it appears as the argument to the "-o"
+ * command line option.
+ *
+ * We handle both special names, regardless of whether
+ * they came from the "-o" option or from the header of
+ * the input stream.
+ */
+ } else {
+ /*
+ * Create output file, and set its mode. POSIX.1-2008
+ * requires the mode to be used exactly, ignoring the
+ * umask and anything else, but we mask it with 0666.
+ */
+ if (freopen(fn, "w", stdout) == NULL ||
+ fchmod(fileno(stdout), mode & 0666) != 0) {
+ warn("%s: %s", fn, inputname);
+ return(1);
+ }
+ }
+
+ if (base64)
+ return base64_decode();
+ else {
+ /* for each input line */
+ for (;;) {
+ if (!fgets(p = buf, sizeof(buf), stdin)) {
+ warnx("%s: short file.", inputname);
+ return(1);
+ }
+#define DEC(c) (((c) - ' ') & 077) /* single character decode */
+ /*
+ * `n' is used to avoid writing out all the characters
+ * at the end of the file.
+ */
+ if ((n = DEC(*p)) <= 0)
+ break;
+ for (++p; n > 0; p += 4, n -= 3)
+ if (n >= 3) {
+ ch = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
+ putchar(ch);
+ ch = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
+ putchar(ch);
+ ch = DEC(p[2]) << 6 | DEC(p[3]);
+ putchar(ch);
+ }
+ else {
+ if (n >= 1) {
+ ch = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
+ putchar(ch);
+ }
+ if (n >= 2) {
+ ch = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
+ putchar(ch);
+ }
+ if (n >= 3) {
+ ch = DEC(p[2]) << 6 | DEC(p[3]);
+ putchar(ch);
+ }
+ }
+ }
+ if (!fgets(buf, sizeof(buf), stdin) || strcmp(buf, "end\n")) {
+ warnx("%s: no \"end\" line.", inputname);
+ return(1);
+ }
+ return(0);
+ }
+}
+
+static int
+checkend(const char *ptr, const char *end, const char *msg)
+{
+ size_t n;
+
+ n = strlen(end);
+ if (strncmp(ptr, end, n) != 0 ||
+ strspn(ptr + n, "\t\r\n") != strlen(ptr + n)) {
+ warnx("%s", msg);
+ return (1);
+ }
+ return (0);
+}
+
+static int
+base64_decode(void)
+{
+ int n;
+ char inbuf[MAXPATHLEN];
+ unsigned char outbuf[MAXPATHLEN * 4];
+
+ for (;;) {
+ if (!fgets(inbuf, sizeof(inbuf), stdin)) {
+ warnx("%s: short file.", inputname);
+ return (1);
+ }
+#ifdef NO_BASE64
+ warnx("%s: base64 decoding is not supported", inputname);
+ return (1);
+#else
+ n = b64_pton(inbuf, outbuf, sizeof(outbuf));
+#endif
+ if (n < 0)
+ break;
+ fwrite(outbuf, 1, n, stdout);
+ }
+ return (checkend(inbuf, "====",
+ "error decoding base64 input stream"));
+}
+
+static void
+usage(void)
+{
+ (void)fprintf(stderr,
+ "usage: %s [-m] [-p | -o outfile] [encoded-file ...]\n",
+ getprogname());
+ exit(1);
+}
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