/*- * 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 char copyright[] = "@(#) Copyright (c) 1983, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint static char sccsid[] = "@(#)uudecode.c 8.2 (Berkeley) 4/2/94"; #endif /* not lint */ /* * uudecode [file ...] * * create the specified file, decoding as you go. * used with uuencode. */ #include #include #include #include #include #include #include char *filename; int cflag, pflag; void usage __P((void)); int decode __P((void)); int decode2 __P((int)); extern int optind; int main(argc, argv) int argc; char *argv[]; { extern int errno; int rval, ch; while ((ch = getopt(argc, argv, "cp")) != EOF) { switch(ch) { case 'c': cflag = 1; /* multiple uudecode'd files */ break; case 'p': pflag = 1; /* print output to stdout */ break; default: (void)usage(); } } argc -= optind; argv += optind; if (*argv) { rval = 0; do { if (!freopen(filename = *argv, "r", stdin)) { (void)fprintf(stderr, "uudecode: %s: %s\n", *argv, strerror(errno)); rval = 1; continue; } rval |= decode(); } while (*++argv); } else { filename = "stdin"; rval = decode(); } exit(rval); } int decode () { 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(flag) int flag; { extern int errno; struct passwd *pw; register int n; register char ch, *p; int mode, n1; char buf[MAXPATHLEN]; char buffn[MAXPATHLEN]; /* file name buffer */ /* search for header line */ do { if (!fgets(buf, sizeof(buf), stdin)) { if (flag) /* no error */ return(0); (void)fprintf(stderr, "uudecode: %s: no \"begin\" line\n", filename); return(1); } } while (strncmp(buf, "begin ", 6) || fnmatch("begin [0-7]* *", buf, 0)); (void)sscanf(buf, "begin %o %s", &mode, buf); /* handle ~user/file format */ if (buf[0] == '~') { if (!(p = index(buf, '/'))) { (void)fprintf(stderr, "uudecode: %s: illegal ~user.\n", filename); return(1); } *p++ = NULL; if (!(pw = getpwnam(buf + 1))) { (void)fprintf(stderr, "uudecode: %s: no user %s.\n", filename, buf); return(1); } n = strlen(pw->pw_dir); n1 = strlen(p); if (n + n1 + 2 > MAXPATHLEN) { (void)fprintf(stderr, "uudecode: %s: path too long.\n", 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 if (!freopen(buf, "w", stdout) || fchmod(fileno(stdout), mode&0666)) { (void)fprintf(stderr, "uudecode: %s: %s: %s\n", buf, filename, strerror(errno)); return(1); } strcpy(buffn, buf); /* store file name from header line */ /* for each input line */ for (;;) { if (!fgets(p = buf, sizeof(buf), stdin)) { (void)fprintf(stderr, "uudecode: %s: short file.\n", filename); return(1); } #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 \ { \ (void)fprintf(stderr, \ "uudecode:\n\tinput file: %s\n\tencoded file: %s\n\t%s: [%d-%d]\n", \ filename, buffn, "character out of range", 1 + ' ', 077 + ' ' + 1); \ return(1); \ } /* * `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"))) { (void)fprintf(stderr, "uudecode: %s: no \"end\" line.\n", filename); return(1); } return(0); } void usage() { (void)fprintf(stderr, "usage: uudecode [-cp] [file ...]\n"); exit(1); }