* Bugs: the spec doesn't mention anything about "`\n`\n" prior to the
* "end" line
*/
+//config:config UUDECODE
+//config: bool "uudecode (5.9 kb)"
+//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"
-static void read_stduu(FILE *src_stream, FILE *dst_stream)
+#if ENABLE_UUDECODE
+static void FAST_FUNC read_stduu(FILE *src_stream, FILE *dst_stream, int flags UNUSED_PARAM)
{
char *line;
- while ((line = xmalloc_fgetline(src_stream)) != NULL) {
+ 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 */
encoded_len = line[0] * 4 / 3;
/* Check that line is not too short. (we tolerate
- * overly _long_ line to accomodate possible extra '`').
+ * 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"); */
}
bb_error_msg_and_die("short file");
}
+#endif
-static void read_base64(FILE *src_stream, FILE *dst_stream)
-{
- int term_count = 1;
-
- while (1) {
- char translated[4];
- int count = 0;
-
- while (count < 4) {
- char *table_ptr;
- int ch;
-
- /* Get next _valid_ character.
- * global vector bb_uuenc_tbl_base64[] contains this string:
- * "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n"
- */
- do {
- ch = fgetc(src_stream);
- if (ch == EOF) {
- bb_error_msg_and_die("short file");
- }
- table_ptr = strchr(bb_uuenc_tbl_base64, ch);
- } while (table_ptr == NULL);
-
- /* Convert encoded character to decimal */
- ch = table_ptr - bb_uuenc_tbl_base64;
-
- if (*table_ptr == '=') {
- if (term_count == 0) {
- translated[count] = '\0';
- break;
- }
- term_count++;
- } else if (*table_ptr == '\n') {
- /* Check for terminating line */
- if (term_count == 5) {
- return;
- }
- term_count = 1;
- continue;
- } else {
- translated[count] = ch;
- count++;
- term_count = 0;
- }
- }
-
- /* Merge 6 bit chars to 8 bit */
- if (count > 1) {
- fputc(translated[0] << 2 | translated[1] >> 4, dst_stream);
- }
- if (count > 2) {
- fputc(translated[1] << 4 | translated[2] >> 2, dst_stream);
- }
- if (count > 3) {
- fputc(translated[2] << 6 | translated[3], dst_stream);
- }
- }
-}
-
+#if ENABLE_UUDECODE
int uudecode_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int uudecode_main(int argc UNUSED_PARAM, char **argv)
{
char *outname = NULL;
char *line;
- opt_complementary = "?1"; /* 1 argument max */
- getopt32(argv, "o:", &outname);
+ getopt32(argv, "^" "o:" "\0" "?1"/* 1 arg max*/, &outname);
argv += optind;
- if (!*argv)
+ if (!argv[0])
*--argv = (char*)"-";
- src_stream = xfopen_stdin(*argv);
+ src_stream = xfopen_stdin(argv[0]);
/* Search for the start of the encoding */
while ((line = xmalloc_fgetline(src_stream)) != NULL) {
- void (*decode_fn_ptr)(FILE *src, FILE *dst);
+ void FAST_FUNC (*decode_fn_ptr)(FILE *src, FILE *dst, int flags);
char *line_ptr;
FILE *dst_stream;
int mode;
- if (strncmp(line, "begin-base64 ", 13) == 0) {
+ if (is_prefixed_with(line, "begin-base64 ")) {
line_ptr = line + 13;
decode_fn_ptr = read_base64;
- } else if (strncmp(line, "begin ", 6) == 0) {
+ } else if (is_prefixed_with(line, "begin ")) {
line_ptr = line + 6;
decode_fn_ptr = read_stduu;
} else {
mode = bb_strtou(line_ptr, NULL, 8);
if (outname == NULL) {
outname = strchr(line_ptr, ' ');
- if ((outname == NULL) || (*outname == '\0')) {
+ 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)) {
fchmod(fileno(dst_stream), mode & (S_IRWXU | S_IRWXG | S_IRWXO));
}
free(line);
- decode_fn_ptr(src_stream, dst_stream);
+ 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 (5 kb)"
+//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;
+
+ opts = getopt32(argv, "^" "d" "\0" "?1"/* 1 arg max*/);
+ 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.
projects / oweals / busybox.git / blobdiff