| /* vi: set sw=4 ts=4: */ |
| /* |
| * Copyright 2003, Glenn McGrath |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| * |
| * Based on specification from |
| * http://www.opengroup.org/onlinepubs/007904975/utilities/uuencode.html |
| * |
| * Bugs: the spec doesn't mention anything about "`\n`\n" prior to the |
| * "end" line |
| */ |
| //config:config UUDECODE |
| //config: bool "uudecode" |
| //config: default y |
| //config: help |
| //config: uudecode is used to decode a uuencoded file. |
| |
| //applet:IF_UUDECODE(APPLET(uudecode, BB_DIR_USR_BIN, BB_SUID_DROP)) |
| |
| //kbuild:lib-$(CONFIG_UUDECODE) += uudecode.o |
| |
| //usage:#define uudecode_trivial_usage |
| //usage: "[-o OUTFILE] [INFILE]" |
| //usage:#define uudecode_full_usage "\n\n" |
| //usage: "Uudecode a file\n" |
| //usage: "Finds OUTFILE in uuencoded source unless -o is given" |
| //usage: |
| //usage:#define uudecode_example_usage |
| //usage: "$ uudecode -o busybox busybox.uu\n" |
| //usage: "$ ls -l busybox\n" |
| //usage: "-rwxr-xr-x 1 ams ams 245264 Jun 7 21:35 busybox\n" |
| |
| #include "libbb.h" |
| |
| #if ENABLE_UUDECODE |
| static void FAST_FUNC read_stduu(FILE *src_stream, FILE *dst_stream, int flags UNUSED_PARAM) |
| { |
| char *line; |
| |
| for (;;) { |
| int encoded_len, str_len; |
| char *line_ptr, *dst; |
| size_t line_len; |
| |
| line_len = 64 * 1024; |
| line = xmalloc_fgets_str_len(src_stream, "\n", &line_len); |
| if (!line) |
| break; |
| /* Handle both Unix and MSDOS text. |
| * Note: space should not be trimmed, some encoders use it instead of "`" |
| * for padding of last incomplete 4-char block. |
| */ |
| str_len = line_len; |
| while (--str_len >= 0 |
| && (line[str_len] == '\n' || line[str_len] == '\r') |
| ) { |
| line[str_len] = '\0'; |
| } |
| |
| if (strcmp(line, "end") == 0) { |
| return; /* the only non-error exit */ |
| } |
| |
| line_ptr = line; |
| while (*line_ptr) { |
| *line_ptr = (*line_ptr - 0x20) & 0x3f; |
| line_ptr++; |
| } |
| str_len = line_ptr - line; |
| |
| encoded_len = line[0] * 4 / 3; |
| /* Check that line is not too short. (we tolerate |
| * overly _long_ line to accommodate possible extra "`"). |
| * Empty line case is also caught here. */ |
| if (str_len <= encoded_len) { |
| break; /* go to bb_error_msg_and_die("short file"); */ |
| } |
| if (encoded_len <= 0) { |
| /* Ignore the "`\n" line, why is it even in the encode file ? */ |
| free(line); |
| continue; |
| } |
| if (encoded_len > 60) { |
| bb_error_msg_and_die("line too long"); |
| } |
| |
| dst = line; |
| line_ptr = line + 1; |
| do { |
| /* Merge four 6 bit chars to three 8 bit chars */ |
| *dst++ = line_ptr[0] << 2 | line_ptr[1] >> 4; |
| encoded_len--; |
| if (encoded_len == 0) { |
| break; |
| } |
| |
| *dst++ = line_ptr[1] << 4 | line_ptr[2] >> 2; |
| encoded_len--; |
| if (encoded_len == 0) { |
| break; |
| } |
| |
| *dst++ = line_ptr[2] << 6 | line_ptr[3]; |
| line_ptr += 4; |
| encoded_len -= 2; |
| } while (encoded_len > 0); |
| fwrite(line, 1, dst - line, dst_stream); |
| free(line); |
| } |
| bb_error_msg_and_die("short file"); |
| } |
| #endif |
| |
| #if ENABLE_UUDECODE |
| int uudecode_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int uudecode_main(int argc UNUSED_PARAM, char **argv) |
| { |
| FILE *src_stream; |
| char *outname = NULL; |
| char *line; |
| |
| opt_complementary = "?1"; /* 1 argument max */ |
| getopt32(argv, "o:", &outname); |
| argv += optind; |
| |
| if (!argv[0]) |
| *--argv = (char*)"-"; |
| src_stream = xfopen_stdin(argv[0]); |
| |
| /* Search for the start of the encoding */ |
| while ((line = xmalloc_fgetline(src_stream)) != NULL) { |
| void FAST_FUNC (*decode_fn_ptr)(FILE *src, FILE *dst, int flags); |
| char *line_ptr; |
| FILE *dst_stream; |
| int mode; |
| |
| if (is_prefixed_with(line, "begin-base64 ")) { |
| line_ptr = line + 13; |
| decode_fn_ptr = read_base64; |
| } else if (is_prefixed_with(line, "begin ")) { |
| line_ptr = line + 6; |
| decode_fn_ptr = read_stduu; |
| } else { |
| free(line); |
| continue; |
| } |
| |
| /* begin line found. decode and exit */ |
| mode = bb_strtou(line_ptr, NULL, 8); |
| if (outname == NULL) { |
| outname = strchr(line_ptr, ' '); |
| if (!outname) |
| break; |
| outname++; |
| trim(outname); /* remove trailing space (and '\r' for DOS text) */ |
| if (!outname[0]) |
| break; |
| } |
| dst_stream = stdout; |
| if (NOT_LONE_DASH(outname)) { |
| dst_stream = xfopen_for_write(outname); |
| fchmod(fileno(dst_stream), mode & (S_IRWXU | S_IRWXG | S_IRWXO)); |
| } |
| free(line); |
| decode_fn_ptr(src_stream, dst_stream, /*flags:*/ BASE64_FLAG_UU_STOP + BASE64_FLAG_NO_STOP_CHAR); |
| /* fclose_if_not_stdin(src_stream); - redundant */ |
| return EXIT_SUCCESS; |
| } |
| bb_error_msg_and_die("no 'begin' line"); |
| } |
| #endif |
| |
| //applet:IF_BASE64(APPLET(base64, BB_DIR_BIN, BB_SUID_DROP)) |
| |
| //kbuild:lib-$(CONFIG_BASE64) += uudecode.o |
| |
| //config:config BASE64 |
| //config: bool "base64" |
| //config: default y |
| //config: help |
| //config: Base64 encode and decode |
| |
| //usage:#define base64_trivial_usage |
| //usage: "[-d] [FILE]" |
| //usage:#define base64_full_usage "\n\n" |
| //usage: "Base64 encode or decode FILE to standard output" |
| //usage: "\n -d Decode data" |
| ////usage: "\n -w COL Wrap lines at COL (default 76, 0 disables)" |
| ////usage: "\n -i When decoding, ignore non-alphabet characters" |
| |
| #if ENABLE_BASE64 |
| int base64_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int base64_main(int argc UNUSED_PARAM, char **argv) |
| { |
| FILE *src_stream; |
| unsigned opts; |
| |
| opt_complementary = "?1"; /* 1 argument max */ |
| opts = getopt32(argv, "d"); |
| argv += optind; |
| |
| if (!argv[0]) |
| *--argv = (char*)"-"; |
| src_stream = xfopen_stdin(argv[0]); |
| if (opts) { |
| read_base64(src_stream, stdout, /*flags:*/ (char)EOF); |
| } else { |
| enum { |
| SRC_BUF_SIZE = 76/4*3, /* This *MUST* be a multiple of 3 */ |
| DST_BUF_SIZE = 4 * ((SRC_BUF_SIZE + 2) / 3), |
| }; |
| char src_buf[SRC_BUF_SIZE]; |
| char dst_buf[DST_BUF_SIZE + 1]; |
| int src_fd = fileno(src_stream); |
| while (1) { |
| size_t size = full_read(src_fd, src_buf, SRC_BUF_SIZE); |
| if (!size) |
| break; |
| if ((ssize_t)size < 0) |
| bb_perror_msg_and_die(bb_msg_read_error); |
| /* Encode the buffer we just read in */ |
| bb_uuencode(dst_buf, src_buf, size, bb_uuenc_tbl_base64); |
| xwrite(STDOUT_FILENO, dst_buf, 4 * ((size + 2) / 3)); |
| bb_putchar('\n'); |
| fflush(stdout); |
| } |
| } |
| |
| fflush_stdout_and_exit(EXIT_SUCCESS); |
| } |
| #endif |
| |
| /* Test script. |
| Put this into an empty dir with busybox binary, an run. |
| |
| #!/bin/sh |
| test -x busybox || { echo "No ./busybox?"; exit; } |
| ln -sf busybox uudecode |
| ln -sf busybox uuencode |
| >A_null |
| echo -n A >A |
| echo -n AB >AB |
| echo -n ABC >ABC |
| echo -n ABCD >ABCD |
| echo -n ABCDE >ABCDE |
| echo -n ABCDEF >ABCDEF |
| cat busybox >A_bbox |
| for f in A*; do |
| echo uuencode $f |
| ./uuencode $f <$f >u_$f |
| ./uuencode -m $f <$f >m_$f |
| done |
| mkdir unpk_u unpk_m 2>/dev/null |
| for f in u_*; do |
| ./uudecode <$f -o unpk_u/${f:2} |
| diff -a ${f:2} unpk_u/${f:2} >/dev/null 2>&1 |
| echo uudecode $f: $? |
| done |
| for f in m_*; do |
| ./uudecode <$f -o unpk_m/${f:2} |
| diff -a ${f:2} unpk_m/${f:2} >/dev/null 2>&1 |
| echo uudecode $f: $? |
| done |
| */ |