/*- * 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. 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. */ #ifndef lint static const char copyright[] = "@(#) Copyright (c) 1983, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #if 0 #ifndef lint static char sccsid[] = "@(#)uudecode.c 8.2 (Berkeley) 4/2/94"; #endif /* not lint */ #endif #include __FBSDID("$FreeBSD$"); /* * uudecode [file ...] * * create the specified file, decoding as you go. * used with uuencode. */ #include #include #include #include #include #include #include #include #include #include #include const char *filename; char *outfile; int cflag, iflag, oflag, pflag, sflag; static void usage(void); int decode(void); int decode2(int); void base64_decode(const char *); int main(int argc, char *argv[]) { int rval, ch; while ((ch = getopt(argc, argv, "cio:ps")) != -1) { switch(ch) { case 'c': if (oflag) usage(); cflag = 1; /* multiple uudecode'd files */ break; case 'i': iflag = 1; /* ask before override files */ break; case 'o': if (cflag || pflag || sflag) usage(); oflag = 1; /* output to the specified file */ sflag = 1; /* do not strip pathnames for output */ outfile = optarg; /* set the output filename */ break; case 'p': if (oflag) usage(); pflag = 1; /* print output to stdout */ break; case 's': if (oflag) usage(); sflag = 1; /* do not strip pathnames for output */ break; default: usage(); } } argc -= optind; argv += optind; if (*argv) { rval = 0; do { if (!freopen(filename = *argv, "r", stdin)) { warn("%s", *argv); rval = 1; continue; } rval |= decode(); } while (*++argv); } else { filename = "stdin"; rval = decode(); } exit(rval); } int decode(void) { int flag; /* decode only one file per input stream */ if (!cflag) return(decode2(0)); /* multiple uudecode'd files */ for (flag = 0; ; flag++) if (decode2(flag)) return(1); else if (feof(stdin)) break; return(0); } int decode2(int flag) { struct passwd *pw; register int n; register char ch, *p; int base64, ignore, n1; char buf[MAXPATHLEN+1]; char buffn[MAXPATHLEN+1]; /* file name buffer */ char *mode, *s; void *mode_handle; base64 = ignore = 0; /* search for header line */ do { if (!fgets(buf, sizeof(buf), stdin)) { if (flag) /* no error */ return(0); warnx("%s: no \"begin\" line", filename); return(1); } } while (strncmp(buf, "begin", 5) != 0); if (strncmp(buf, "begin-base64", 12) == 0) base64 = 1; /* Parse the header: begin{,-base64} mode outfile. */ s = strtok(buf, " "); if (s == NULL) errx(1, "no mode or filename in input file"); s = strtok(NULL, " "); if (s == NULL) errx(1, "no mode in input file"); else { mode = strdup(s); if (mode == NULL) err(1, "strdup()"); } if (!oflag) { outfile = strtok(NULL, "\r\n"); if (outfile == NULL) errx(1, "no filename in input file"); } if (strlcpy(buf, outfile, sizeof(buf)) >= sizeof(buf)) errx(1, "%s: filename too long", outfile); if (!sflag && !pflag) { strlcpy(buffn, buf, sizeof(buffn)); if (strrchr(buffn, '/') != NULL) strncpy(buf, strrchr(buffn, '/') + 1, sizeof(buf)); if (buf[0] == '\0') { warnx("%s: illegal filename", buffn); return(1); } /* handle ~user/file format */ if (buf[0] == '~') { if (!(p = index(buf, '/'))) { warnx("%s: illegal ~user", filename); return(1); } *p++ = '\0'; if (!(pw = getpwnam(buf + 1))) { warnx("%s: no user %s", filename, buf); return(1); } n = strlen(pw->pw_dir); n1 = strlen(p); if (n + n1 + 2 > MAXPATHLEN) { warnx("%s: path too long", filename); return(1); } bcopy(p, buf + n + 1, n1 + 1); bcopy(pw->pw_dir, buf, n); buf[n] = '/'; } } /* create output file, set mode */ if (pflag) ; /* print to stdout */ else { mode_handle = setmode(mode); if (mode_handle == NULL) err(1, "setmode()"); if (iflag && !access(buf, F_OK)) { (void)fprintf(stderr, "not overwritten: %s\n", buf); ignore++; } else if (!freopen(buf, "w", stdout) || fchmod(fileno(stdout), getmode(mode_handle, 0) & 0666)) { warn("%s: %s", buf, filename); return(1); } free(mode_handle); free(mode); } strcpy(buffn, buf); /* store file name from header line */ /* for each input line */ next: for (;;) { if (!fgets(p = buf, sizeof(buf), stdin)) { warnx("%s: short file", filename); return(1); } if (base64) { if (strncmp(buf, "====", 4) == 0) return (0); base64_decode(buf); goto next; } #define DEC(c) (((c) - ' ') & 077) /* single character decode */ #define IS_DEC(c) ( (((c) - ' ') >= 0) && (((c) - ' ') <= 077 + 1) ) /* #define IS_DEC(c) (1) */ #define OUT_OF_RANGE \ { \ warnx( \ "\n\tinput file: %s\n\tencoded file: %s\n\tcharacter out of range: [%d-%d]", \ filename, buffn, 1 + ' ', 077 + ' ' + 1); \ return(1); \ } #define PUTCHAR(c) \ if (!ignore) \ putchar(c) /* * `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) { if (!(IS_DEC(*p) && IS_DEC(*(p + 1)) && IS_DEC(*(p + 2)) && IS_DEC(*(p + 3)))) OUT_OF_RANGE 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) { if (!(IS_DEC(*p) && IS_DEC(*(p + 1)))) OUT_OF_RANGE ch = DEC(p[0]) << 2 | DEC(p[1]) >> 4; PUTCHAR(ch); } if (n >= 2) { if (!(IS_DEC(*(p + 1)) && IS_DEC(*(p + 2)))) OUT_OF_RANGE ch = DEC(p[1]) << 4 | DEC(p[2]) >> 2; PUTCHAR(ch); } if (n >= 3) { if (!(IS_DEC(*(p + 2)) && IS_DEC(*(p + 3)))) OUT_OF_RANGE ch = DEC(p[2]) << 6 | DEC(p[3]); PUTCHAR(ch); } } } if (fgets(buf, sizeof(buf), stdin) == NULL || (strcmp(buf, "end") && strcmp(buf, "end\n") && strcmp(buf, "end\r\n"))) { warnx("%s: no \"end\" line", filename); return(1); } return(0); } void base64_decode(const char *stream) { unsigned char out[MAXPATHLEN * 4]; int rv; if (index(stream, '\r') != NULL) *index(stream, '\r') = '\0'; if (index(stream, '\n') != NULL) *index(stream, '\n') = '\0'; rv = b64_pton(stream, out, (sizeof(out) / sizeof(out[0]))); if (rv == -1) errx(1, "b64_pton: error decoding base64 input stream"); fwrite(out, 1, rv, stdout); } static void usage(void) { (void)fprintf(stderr, "usage: uudecode [-cips] [file ...]\n"); (void)fprintf(stderr, "usage: uudecode [-i] -o output_file [file]\n"); exit(1); }