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