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Annotation of 43BSDTahoe/usr.bin/uucp/uuencode.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that the above copyright notice and this paragraph are
                      7:  * duplicated in all such forms and that any documentation,
                      8:  * advertising materials, and other materials related to such
                      9:  * distribution and use acknowledge that the software was developed
                     10:  * by the University of California, Berkeley.  The name of the
                     11:  * University may not be used to endorse or promote products derived
                     12:  * from this software without specific prior written permission.
                     13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     16:  */
                     17: 
                     18: #ifndef lint
                     19: static char sccsid[] = "@(#)uuencode.c 5.6 (Berkeley) 7/6/88";
                     20: #endif /* not lint */
                     21: 
                     22: /*
                     23:  * uuencode [input] output
                     24:  *
                     25:  * Encode a file so it can be mailed to a remote system.
                     26:  */
                     27: #include <stdio.h>
                     28: #include <sys/types.h>
                     29: #include <sys/stat.h>
                     30: 
                     31: /* ENC is the basic 1 character encoding function to make a char printing */
                     32: #define ENC(c) ((c) ? ((c) & 077) + ' ': '`')
                     33: 
                     34: main(argc, argv)
                     35: char **argv;
                     36: {
                     37:        FILE *in;
                     38:        struct stat sbuf;
                     39:        int mode;
                     40: 
                     41:        /* optional 1st argument */
                     42:        if (argc > 2) {
                     43:                if ((in = fopen(argv[1], "r")) == NULL) {
                     44:                        perror(argv[1]);
                     45:                        exit(1);
                     46:                }
                     47:                argv++; argc--;
                     48:        } else
                     49:                in = stdin;
                     50: 
                     51:        if (argc != 2) {
                     52:                fprintf(stderr,"Usage: uuencode [infile] remotefile\n");
                     53:                exit(2);
                     54:        }
                     55: 
                     56:        /* figure out the input file mode */
                     57:        if (fstat(fileno(in), &sbuf) < 0 || !isatty(fileno(in)))
                     58:                mode = 0666 & ~umask(0666);
                     59:        else
                     60:                mode = sbuf.st_mode & 0777;
                     61:        printf("begin %o %s\n", mode, argv[1]);
                     62: 
                     63:        encode(in, stdout);
                     64: 
                     65:        printf("end\n");
                     66:        exit(0);
                     67: }
                     68: 
                     69: /*
                     70:  * copy from in to out, encoding as you go along.
                     71:  */
                     72: encode(in, out)
                     73: register FILE *in;
                     74: register FILE *out;
                     75: {
                     76:        char buf[80];
                     77:        register int i, n;
                     78: 
                     79:        for (;;) {
                     80:                /* 1 (up to) 45 character line */
                     81:                n = fread(buf, 1, 45, in);
                     82:                putc(ENC(n), out);
                     83: 
                     84:                for (i=0; i<n; i += 3)
                     85:                        outdec(&buf[i], out);
                     86: 
                     87:                putc('\n', out);
                     88:                if (n <= 0)
                     89:                        break;
                     90:        }
                     91: }
                     92: 
                     93: /*
                     94:  * output one group of 3 bytes, pointed at by p, on file f.
                     95:  */
                     96: outdec(p, f)
                     97: register char *p;
                     98: register FILE *f;
                     99: {
                    100:        register int c1, c2, c3, c4;
                    101: 
                    102:        c1 = *p >> 2;
                    103:        c2 = (*p << 4) & 060 | (p[1] >> 4) & 017;
                    104:        c3 = (p[1] << 2) & 074 | (p[2] >> 6) & 03;
                    105:        c4 = p[2] & 077;
                    106:        putc(ENC(c1), f);
                    107:        putc(ENC(c2), f);
                    108:        putc(ENC(c3), f);
                    109:        putc(ENC(c4), f);
                    110: }

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