LXR busybox/coreutils/uuencode.c

   1/* vi: set sw=4 ts=4: */
   2/*
   3 *  Copyright (C) 2000 by Glenn McGrath
   4 *
   5 *  based on the function base64_encode from http.c in wget v1.6
   6 *  Copyright (C) 1995, 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
   7 *
   8 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   9 */
  10
  11//usage:#define uuencode_trivial_usage
  12//usage:       "[-m] [INFILE] STORED_FILENAME"
  13//usage:#define uuencode_full_usage "\n\n"
  14//usage:       "Uuencode a file to stdout\n"
  15//usage:     "\n        -m      Use base64 encoding per RFC1521"
  16//usage:
  17//usage:#define uuencode_example_usage
  18//usage:       "$ uuencode busybox busybox\n"
  19//usage:       "begin 755 busybox\n"
  20//usage:       "<encoded file snipped>\n"
  21//usage:       "$ uudecode busybox busybox > busybox.uu\n"
  22//usage:       "$\n"
  23
  24#include "libbb.h"
  25
  26enum {
  27        SRC_BUF_SIZE = 15*3,  /* This *MUST* be a multiple of 3 */
  28        DST_BUF_SIZE = 4 * ((SRC_BUF_SIZE + 2) / 3),
  29};
  30
  31int uuencode_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  32int uuencode_main(int argc UNUSED_PARAM, char **argv)
  33{
  34        struct stat stat_buf;
  35        int src_fd = STDIN_FILENO;
  36        const char *tbl;
  37        mode_t mode;
  38        char src_buf[SRC_BUF_SIZE];
  39        char dst_buf[DST_BUF_SIZE + 1];
  40
  41        tbl = bb_uuenc_tbl_std;
  42        mode = 0666 & ~umask(0666);
  43        opt_complementary = "-1:?2"; /* must have 1 or 2 args */
  44        if (getopt32(argv, "m")) {
  45                tbl = bb_uuenc_tbl_base64;
  46        }
  47        argv += optind;
  48        if (argv[1]) {
  49                src_fd = xopen(argv[0], O_RDONLY);
  50                fstat(src_fd, &stat_buf);
  51                mode = stat_buf.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
  52                argv++;
  53        }
  54
  55        printf("begin%s %o %s", tbl == bb_uuenc_tbl_std ? "" : "-base64", mode, *argv);
  56        while (1) {
  57                size_t size = full_read(src_fd, src_buf, SRC_BUF_SIZE);
  58                if (!size)
  59                        break;
  60                if ((ssize_t)size < 0)
  61                        bb_perror_msg_and_die(bb_msg_read_error);
  62                /* Encode the buffer we just read in */
  63                bb_uuencode(dst_buf, src_buf, size, tbl);
  64                bb_putchar('\n');
  65                if (tbl == bb_uuenc_tbl_std) {
  66                        bb_putchar(tbl[size]);
  67                }
  68                fflush(stdout);
  69                xwrite(STDOUT_FILENO, dst_buf, 4 * ((size + 2) / 3));
  70        }
  71        printf(tbl == bb_uuenc_tbl_std ? "\n`\nend\n" : "\n====\n");
  72
  73        fflush_stdout_and_exit(EXIT_SUCCESS);
  74}
  75