release/src/router/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] [FILE] STORED_FILENAME"
  13 //usage:#define uuencode_full_usage "\n\n"
  14 //usage:       "Uuencode FILE (or stdin) 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
  26 enum {
  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
  31 int uuencode_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  32 int 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 }