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#include "libbb.h"
  12
  13enum {
  14        SRC_BUF_SIZE = 15*3,  /* This *MUST* be a multiple of 3 */
  15        DST_BUF_SIZE = 4 * ((SRC_BUF_SIZE + 2) / 3),
  16};
  17
  18int uuencode_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  19int uuencode_main(int argc UNUSED_PARAM, char **argv)
  20{
  21        struct stat stat_buf;
  22        int src_fd = STDIN_FILENO;
  23        const char *tbl;
  24        mode_t mode;
  25        char src_buf[SRC_BUF_SIZE];
  26        char dst_buf[DST_BUF_SIZE + 1];
  27
  28        tbl = bb_uuenc_tbl_std;
  29        mode = 0666 & ~umask(0666);
  30        opt_complementary = "-1:?2"; /* must have 1 or 2 args */
  31        if (getopt32(argv, "m")) {
  32                tbl = bb_uuenc_tbl_base64;
  33        }
  34        argv += optind;
  35        if (argv[1]) {
  36                src_fd = xopen(argv[0], O_RDONLY);
  37                fstat(src_fd, &stat_buf);
  38                mode = stat_buf.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
  39                argv++;
  40        }
  41
  42        printf("begin%s %o %s", tbl == bb_uuenc_tbl_std ? "" : "-base64", mode, *argv);
  43        while (1) {
  44                size_t size = full_read(src_fd, src_buf, SRC_BUF_SIZE);
  45                if (!size)
  46                        break;
  47                if ((ssize_t)size < 0)
  48                        bb_perror_msg_and_die(bb_msg_read_error);
  49                /* Encode the buffer we just read in */
  50                bb_uuencode(dst_buf, src_buf, size, tbl);
  51                bb_putchar('\n');
  52                if (tbl == bb_uuenc_tbl_std) {
  53                        bb_putchar(tbl[size]);
  54                }
  55                fflush(stdout);
  56                xwrite(STDOUT_FILENO, dst_buf, 4 * ((size + 2) / 3));
  57        }
  58        printf(tbl == bb_uuenc_tbl_std ? "\n`\nend\n" : "\n====\n");
  59
  60        fflush_stdout_and_exit(EXIT_SUCCESS);
  61}
  62