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Annotation of 43BSDReno/usr.bin/uuencode/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 provided
        !             6:  * that: (1) source distributions retain this entire copyright notice and
        !             7:  * comment, and (2) distributions including binaries display the following
        !             8:  * acknowledgement:  ``This product includes software developed by the
        !             9:  * University of California, Berkeley and its contributors'' in the
        !            10:  * documentation or other materials provided with the distribution and in
        !            11:  * all advertising materials mentioning features or use of this software.
        !            12:  * Neither the name of the University nor the names of its contributors may
        !            13:  * be used to endorse or promote products derived from this software without
        !            14:  * specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            16:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            17:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: static char sccsid[] = "@(#)uuencode.c 5.9 (Berkeley) 6/1/90";
        !            22: #endif /* not lint */
        !            23: 
        !            24: /*
        !            25:  * uuencode [input] output
        !            26:  *
        !            27:  * Encode a file so it can be mailed to a remote system.
        !            28:  */
        !            29: #include <sys/types.h>
        !            30: #include <sys/stat.h>
        !            31: #include <stdio.h>
        !            32: 
        !            33: main(argc, argv)
        !            34:        int argc;
        !            35:        char **argv;
        !            36: {
        !            37:        extern int optind;
        !            38:        extern int errno;
        !            39:        struct stat sb;
        !            40:        int mode;
        !            41:        char *strerror();
        !            42: 
        !            43:        while (getopt(argc, argv, "") != EOF)
        !            44:                usage();
        !            45:        argv += optind;
        !            46:        argc -= optind;
        !            47: 
        !            48:        switch(argc) {
        !            49:        case 2:                 /* optional first argument is input file */
        !            50:                if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb)) {
        !            51:                        (void)fprintf(stderr, "uuencode: %s: %s.\n",
        !            52:                            *argv, strerror(errno));
        !            53:                        exit(1);
        !            54:                }
        !            55: #define        RWX     (S_IRWXU|S_IRWXG|S_IRWXO)
        !            56:                mode = sb.st_mode & RWX;
        !            57:                ++argv;
        !            58:                break;
        !            59:        case 1:
        !            60: #define        RW      (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
        !            61:                mode = RW & ~umask(RW);
        !            62:                break;
        !            63:        case 0:
        !            64:        default:
        !            65:                usage();
        !            66:        }
        !            67: 
        !            68:        (void)printf("begin %o %s\n", mode, *argv);
        !            69:        encode();
        !            70:        (void)printf("end\n");
        !            71:        if (ferror(stdout)) {
        !            72:                (void)fprintf(stderr, "uuencode: write error.\n");
        !            73:                exit(1);
        !            74:        }
        !            75:        exit(0);
        !            76: }
        !            77: 
        !            78: /* ENC is the basic 1 character encoding function to make a char printing */
        !            79: #define        ENC(c) ((c) ? ((c) & 077) + ' ': '`')
        !            80: 
        !            81: /*
        !            82:  * copy from in to out, encoding as you go along.
        !            83:  */
        !            84: encode()
        !            85: {
        !            86:        register int ch, n;
        !            87:        register char *p;
        !            88:        char buf[80];
        !            89: 
        !            90:        while (n = fread(buf, 1, 45, stdin)) {
        !            91:                ch = ENC(n);
        !            92:                if (putchar(ch) == EOF)
        !            93:                        break;
        !            94:                for (p = buf; n > 0; n -= 3, p += 3) {
        !            95:                        ch = *p >> 2;
        !            96:                        ch = ENC(ch);
        !            97:                        if (putchar(ch) == EOF)
        !            98:                                break;
        !            99:                        ch = (*p << 4) & 060 | (p[1] >> 4) & 017;
        !           100:                        ch = ENC(ch);
        !           101:                        if (putchar(ch) == EOF)
        !           102:                                break;
        !           103:                        ch = (p[1] << 2) & 074 | (p[2] >> 6) & 03;
        !           104:                        ch = ENC(ch);
        !           105:                        if (putchar(ch) == EOF)
        !           106:                                break;
        !           107:                        ch = p[2] & 077;
        !           108:                        ch = ENC(ch);
        !           109:                        if (putchar(ch) == EOF)
        !           110:                                break;
        !           111:                }
        !           112:                if (putchar('\n') == EOF)
        !           113:                        break;
        !           114:        }
        !           115:        if (ferror(stdin)) {
        !           116:                (void)fprintf(stderr, "uuencode: read error.\n");
        !           117:                exit(1);
        !           118:        }
        !           119:        ch = ENC('\0');
        !           120:        (void)putchar(ch);
        !           121:        (void)putchar('\n');
        !           122: }
        !           123: 
        !           124: usage()
        !           125: {
        !           126:        (void)fprintf(stderr,"usage: uuencode [infile] remotefile\n");
        !           127:        exit(1);
        !           128: }

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