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uuencode.c 2.3 KB

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  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. //config:config UUENCODE
  11. //config: bool "uuencode (4.4 kb)"
  12. //config: default y
  13. //config: help
  14. //config: uuencode is used to uuencode a file.
  15. //applet:IF_UUENCODE(APPLET(uuencode, BB_DIR_USR_BIN, BB_SUID_DROP))
  16. //kbuild:lib-$(CONFIG_UUENCODE) += uuencode.o
  17. //usage:#define uuencode_trivial_usage
  18. //usage: "[-m] [FILE] STORED_FILENAME"
  19. //usage:#define uuencode_full_usage "\n\n"
  20. //usage: "Uuencode FILE (or stdin) to stdout\n"
  21. //usage: "\n -m Use base64 encoding per RFC1521"
  22. //usage:
  23. //usage:#define uuencode_example_usage
  24. //usage: "$ uuencode busybox busybox\n"
  25. //usage: "begin 755 busybox\n"
  26. //usage: "<encoded file snipped>\n"
  27. //usage: "$ uudecode busybox busybox > busybox.uu\n"
  28. //usage: "$\n"
  29. #include "libbb.h"
  30. enum {
  31. SRC_BUF_SIZE = 15*3, /* This *MUST* be a multiple of 3 */
  32. DST_BUF_SIZE = 4 * ((SRC_BUF_SIZE + 2) / 3),
  33. };
  34. int uuencode_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  35. int uuencode_main(int argc UNUSED_PARAM, char **argv)
  36. {
  37. struct stat stat_buf;
  38. int src_fd = STDIN_FILENO;
  39. const char *tbl;
  40. mode_t mode;
  41. char src_buf[SRC_BUF_SIZE];
  42. char dst_buf[DST_BUF_SIZE + 1];
  43. tbl = bb_uuenc_tbl_std;
  44. mode = 0666 & ~umask(0666);
  45. if (getopt32(argv, "^" "m" "\0" "-1:?2"/*must have 1 or 2 args*/)) {
  46. tbl = bb_uuenc_tbl_base64;
  47. }
  48. argv += optind;
  49. if (argv[1]) {
  50. src_fd = xopen(argv[0], O_RDONLY);
  51. fstat(src_fd, &stat_buf);
  52. mode = stat_buf.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
  53. argv++;
  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_simple_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. fflush_stdout_and_exit(EXIT_SUCCESS);
  73. }