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- /* bituudec.c */
-
- /* Exit status values:
- 1 Unable to open input file.
- 2 Removed, used to indicate more than one argument.
- 3 No begin line, probably not a uuencoded file.
- 4 Unable to write output file.
- 5 Missing an end line, file may be truncated?
- 10 Short file, EOF reached while decoding.
- */
-
- /* Modified version of uudecode by Mark S. Zinzow
- in IBM C or MSC V. 2 use
- clink bituudec ssetargv;
- to get DOS command line wildcard processing */
-
- #ifndef lint
- static char sccsid[] = "@(#)bituudecode.c 6.0 (Berkeley & M.S.Z.) 3/22/87"
- #endif
-
- /*
- * uudecode [input]
- *
- * create the specified file, decoding as you go.
- * used with uuencode.
- */
- #include <stdio.h>
- #ifndef MSDOS
- #include <pwd.h>
- #endif
- #include <sys/types.h>
- #include <sys/stat.h>
-
- /* single character decode */
- #define DEC(c) (((c) - ' ') & 077)
-
- main(argc, argv)
- char **argv;
- {
- FILE *in;
-
- /* M.S.Z. 3/22/87
- The following code block was deleted to support decoding of multiple
- files with the use of wild cards or several command line filenames.
- Part of the main line was moved to the function uufile with the
- appropriate changes for repeating for several files.
- */
-
- /* optional input arg M.S.Z why only one file?
- if (argc > 1) {
- if ((in = fopen(argv[1], "r")) == NULL) {
- perror(argv[1]);
- exit(1);
- }
- argv++; argc--;
- } else
- in = stdin;
-
- if (argc != 1) {
- printf("Usage: uudecode [infile]\n");
- exit(2);
- } */
-
- if (argc == 1) /* no args; copy standard input */
- uufile(stdin);
- else
- while (--argc > 0)
- if ((in = fopen(*++argv, "r")) == NULL) {
- perror(*argv);
- exit(1);
- } else {
- uufile(in);
- fclose(in);
- }
- exit(0);
- }
-
- uufile(in) /* Process one input file M.S.Z. */
- FILE *in;
- {
- FILE *out;
- struct stat sbuf;
- int mode, filect=0;
- char dest[128];
- char buf[80];
-
- while ( !feof(in) ) { /* added while and filect for status */
- /* search for header line */
- for (;;) {
- if (fgets(buf, sizeof buf, in) == NULL) {
- if (filect < 1) {
- fprintf(stderr, "No begin line\n");
- exit(3);
- }
- else
- return;
- }
- if (strncmp(buf, "begin ", 6) == 0)
- break;
- }
- sscanf(buf, "begin %o %s", &mode, dest);
- fprintf(stderr,
- "Processing file %d \"%s\", in current source file.\n",
- ++filect,dest);
-
- /* handle ~user/file format */
- #ifndef MSDOS
- if (dest[0] == '~') {
- char *sl;
- struct passwd *getpwnam();
- char *index();
- struct passwd *user;
- char dnbuf[100];
-
- sl = index(dest, '/');
- if (sl == NULL) {
- fprintf(stderr, "Illegal ~user\n");
- exit(3);
- }
- *sl++ = 0;
- user = getpwnam(dest+1);
- if (user == NULL) {
- fprintf(stderr, "No such user as %s\n", dest);
- exit(4);
- }
- strcpy(dnbuf, user->pw_dir);
- strcat(dnbuf, "/");
- strcat(dnbuf, sl);
- strcpy(dest, dnbuf);
- }
- #endif
-
- /* create output file */
- #ifdef MSDOS
- /* binary output file */
- out = fopen(dest, "wb");
- #else
- out = fopen(dest, "w");
- #endif
- if (out == NULL) {
- perror(dest);
- exit(4);
- }
- chmod(dest, mode);
-
- decode(in, out);
-
- if (fgets(buf, sizeof buf, in) == NULL || strcmp(buf, "end\n")) {
- fprintf(stderr, "No end line\n");
- exit(5);
- }
- fclose(out);
- }
- }
-
- /*
- * copy from in to out, decoding as you go along.
- */
- decode(in, out)
- FILE *in;
- FILE *out;
- {
- char buf[80];
- char *bp;
- int n,j,k,l; /* M.S.Z. added jkl for a counters in padding spaces */
-
- for (;;) {
- /* for each input line */
- if (fgets(buf, sizeof buf, in) == NULL) {
- printf("Short file\n");
- exit(10);
- }
- n = DEC(buf[0]);
-
- /* was
- if (n <= 0)
- break;
- */
- if (buf[0] <= ' ')
- break;
- /* M.S.Z. What good does it do to test n<0 when in DEC the sign bits are
- masked off?
- This seems to allow us to just ignore blank lines.
- A blank line (just \n) before the final end used to cause
- a short file error message, now that's not a problem.
-
- Next I'm adding a kludge to tack trailing spaces back on the input lines: */
-
- j = strlen(buf);
- k = n*4/3 + 2 ; /* add 1 for \n and 1 for the first count char
- if ( j < k )
- for( l=j-1 ; l < k && l < sizeof buf ; l++ ) buf[l] = '
- /* Ignore that this changes the \n to a ' ';
- that doesn't hurt. M.S.Z. */
-
- /* M.S.Z. end kludge */
-
- bp = &buf[1];
- while (n > 0) {
- outdec(bp, out, n);
- bp += 4;
- n -= 3;
- }
- }
- }
-
- /*
- * output a group of 3 bytes (4 input characters).
- * the input chars are pointed to by p, they are to
- * be output to file f. n is used to tell us not to
- * output all of them at the end of the file.
- */
- outdec(p, f, n)
- char *p;
- FILE *f;
- {
- int c1, c2, c3;
-
- c1 = DEC(*p) << 2 | DEC(p[1]) >> 4;
- c2 = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
- c3 = DEC(p[2]) << 6 | DEC(p[3]);
- if (n >= 1)
- putc(c1, f);
- if (n >= 2)
- putc(c2, f);
- if (n >= 3)
- putc(c3, f);
-
- /* M.S.Z. Another problem. Nobody notices when the disk is full! */
- if (ferror(f)) {
- perror("Write error");
- exit(4);
- }
- /* M.S.Z. end another hack */
-
- }
-
-
- /* fr: like read but stdio */
- int
- fr(fd, buf, cnt)
- FILE *fd;
- char *buf;
- int cnt;
- {
- int c, i;
-
- for (i=0; i<cnt; i++) {
- c = getc(fd);
- if (c == EOF)
- return(i);
- buf[i] = c;
- }
- return (cnt);
- }
-
- /*
- * Return the ptr in sp at which the character c appears;
- * NULL if not found
- */
-
- #define NULL 0
-
- char *
- index(sp, c)
- register char *sp, c;
- {
- do {
- if (*sp == c)
- return(sp);
- } while (*sp++);
- return(NULL);
- }
-