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uudecode: fix to base64 decode by Jorgen Cederlof <jcz@google.com>
improved help texts # make bloatcheck function old new delta .rodata 127000 127032 +32 packed_usage 22156 22151 -5 uudecode_main 360 348 -12 uuencode_main 490 468 -22 read_base64 283 254 -29 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/4 up/down: 32/-68) Total: -36 bytes
This commit is contained in:
Denis Vlasenko
parent
8c1aaf3297
commit
746204b1b8
@ -70,7 +70,7 @@ static void read_base64(FILE *src_stream, FILE *dst_stream)
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{
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static const char base64_table[] =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n";
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int term_count = 0;
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int term_count = 1;
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while (1) {
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char translated[4];
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@ -86,19 +86,19 @@ static void read_base64(FILE *src_stream, FILE *dst_stream)
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if (ch == EOF) {
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bb_error_msg_and_die("short file");
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}
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} while ((table_ptr = strchr(base64_table, ch)) == NULL);
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table_ptr = strchr(base64_table, ch);
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} while (table_ptr == NULL);
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/* Convert encoded charcter to decimal */
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ch = table_ptr - base64_table;
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if (*table_ptr == '=') {
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if (term_count == 0) {
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translated[count] = 0;
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translated[count] = '\0';
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break;
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}
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term_count++;
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}
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else if (*table_ptr == '\n') {
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} else if (*table_ptr == '\n') {
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/* Check for terminating line */
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if (term_count == 5) {
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return;
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@ -113,7 +113,9 @@ static void read_base64(FILE *src_stream, FILE *dst_stream)
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}
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/* Merge 6 bit chars to 8 bit */
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fputc(translated[0] << 2 | translated[1] >> 4, dst_stream);
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if (count > 1) {
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fputc(translated[0] << 2 | translated[1] >> 4, dst_stream);
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}
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if (count > 2) {
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fputc(translated[1] << 4 | translated[2] >> 2, dst_stream);
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}
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@ -126,19 +128,16 @@ static void read_base64(FILE *src_stream, FILE *dst_stream)
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int uudecode_main(int argc, char **argv);
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int uudecode_main(int argc, char **argv)
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{
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FILE *src_stream;
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FILE *src_stream = stdin;
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char *outname = NULL;
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char *line;
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opt_complementary = "?1"; /* 1 argument max */
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getopt32(argc, argv, "o:", &outname);
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argv += optind;
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if (optind == argc) {
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src_stream = stdin;
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} else if (optind + 1 == argc) {
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src_stream = xfopen(argv[optind], "r");
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} else {
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bb_show_usage();
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}
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if (argv[0])
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src_stream = xfopen(argv[0], "r");
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/* Search for the start of the encoding */
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while ((line = xmalloc_getline(src_stream)) != NULL) {
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@ -158,6 +157,7 @@ int uudecode_main(int argc, char **argv)
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continue;
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}
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/* begin line found. decode and exit */
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mode = strtoul(line_ptr, NULL, 8);
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if (outname == NULL) {
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outname = strchr(line_ptr, ' ');
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@ -166,16 +166,48 @@ int uudecode_main(int argc, char **argv)
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}
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outname++;
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}
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if (LONE_DASH(outname)) {
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dst_stream = stdout;
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} else {
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dst_stream = stdout;
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if (NOT_LONE_DASH(outname)) {
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dst_stream = xfopen(outname, "w");
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chmod(outname, mode & (S_IRWXU | S_IRWXG | S_IRWXO));
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}
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free(line);
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decode_fn_ptr(src_stream, dst_stream);
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fclose_if_not_stdin(src_stream);
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/* fclose_if_not_stdin(src_stream); - redundant */
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return EXIT_SUCCESS;
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}
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bb_error_msg_and_die("no 'begin' line");
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}
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/* Test script.
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Put this into an empty dir with busybox binary, an run.
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#!/bin/sh
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test -x busybox || { echo "No ./busybox?"; exit; }
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ln -sf busybox uudecode
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ln -sf busybox uuencode
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>A_null
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echo -n A >A
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echo -n AB >AB
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echo -n ABC >ABC
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echo -n ABCD >ABCD
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echo -n ABCDE >ABCDE
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echo -n ABCDEF >ABCDEF
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cat busybox >A_bbox
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for f in A*; do
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echo uuencode $f
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./uuencode $f <$f >u_$f
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./uuencode -m $f <$f >m_$f
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done
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mkdir unpk_u unpk_m 2>/dev/null
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for f in u_*; do
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./uudecode <$f -o unpk_u/${f:2}
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diff -a ${f:2} unpk_u/${f:2} >/dev/null 2>&1
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echo uudecode $f: $?
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done
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for f in m_*; do
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./uudecode <$f -o unpk_m/${f:2}
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diff -a ${f:2} unpk_m/${f:2} >/dev/null 2>&1
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echo uudecode $f: $?
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done
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*/
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@ -28,7 +28,7 @@ int uuencode_main(int argc, char **argv)
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RESERVE_CONFIG_BUFFER(dst_buf, DST_BUF_SIZE + 1);
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tbl = bb_uuenc_tbl_std;
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if (getopt32(argc, argv, "m") & 1) {
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if (getopt32(argc, argv, "m")) {
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tbl = bb_uuenc_tbl_base64;
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}
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@ -37,9 +37,6 @@ int uuencode_main(int argc, char **argv)
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src_stream = xfopen(argv[optind], "r");
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xstat(argv[optind], &stat_buf);
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mode = stat_buf.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
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if (src_stream == stdout) {
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puts("NULL");
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}
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break;
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case 1:
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mode = 0666 & ~umask(0666);
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@ -3664,20 +3664,19 @@ USE_FEATURE_RUN_PARTS_FANCY("\n -l Prints names of all matching files even when
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"[pauses for 1 second]\n"
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#define uudecode_trivial_usage \
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"[FILE]..."
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"[-o outfile] [infile]"
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#define uudecode_full_usage \
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"Uudecode a file" \
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"\n\nOptions:\n" \
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" -o FILE Direct output to FILE"
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"Uudecode a file\n" \
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"NB: finds outfile name in uuencoded source unless -o is given"
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#define uudecode_example_usage \
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"$ uudecode -o busybox busybox.uu\n" \
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"$ ls -l busybox\n" \
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"-rwxr-xr-x 1 ams ams 245264 Jun 7 21:35 busybox\n"
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#define uuencode_trivial_usage \
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"[OPTION] [INFILE] REMOTEFILE"
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"[-m] [infile] stored_filename"
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#define uuencode_full_usage \
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"Uuencode a file" \
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"Uuencode a file to stdout" \
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"\n\nOptions:\n" \
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" -m Use base64 encoding per RFC1521"
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#define uuencode_example_usage \
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