diff options
Diffstat (limited to 'coreutils')
| -rw-r--r-- | coreutils/uuencode.c | 389 |
1 files changed, 170 insertions, 219 deletions
diff --git a/coreutils/uuencode.c b/coreutils/uuencode.c index 35a533309..d46fb1588 100644 --- a/coreutils/uuencode.c +++ b/coreutils/uuencode.c @@ -1,237 +1,188 @@ -/* uuencode.c -- uuencode utility. - * Copyright (C) 1994, 1995 Free Software Foundation, Inc. +/* vi: set sw=4 ts=4: */ +/* + * Copyright (C) 2000 by Glenn McGrath * - * This product is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. + * based on the function base64_encode from http.c in wget v1.6 + * Copyright (C) 1995, 1996, 1997, 1998, 2000 Free Software Foundation, Inc. * - * This product is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. * - * You should have received a copy of the GNU General Public License - * along with this product; see the file COPYING. If not, write to - * the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA - * 02111-1307, USA. + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Library General Public License for more details. * - * Original copyright notice is retained at the end of this file. + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -/* Reworked to GNU style by Ian Lance Taylor, ian@airs.com, August 93. */ -/* Hacked to work with BusyBox by Alfred M. Szmidt */ - - - -#include <stdio.h> -#include <errno.h> #include <getopt.h> +#include <stdio.h> #include <stdlib.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> #include "busybox.h" -#define RW (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH) - -static void encode __P ((void)); - -/* Pointer to the translation table we currently use. */ -static const char *trans_ptr; - -/* The two currently defined translation tables. The first is the - standard uuencoding, the second is base64 encoding. */ -static const char uu_std[64] = { - '`', '!', '"', '#', '$', '%', '&', '\'', - '(', ')', '*', '+', ',', '-', '.', '/', - '0', '1', '2', '3', '4', '5', '6', '7', - '8', '9', ':', ';', '<', '=', '>', '?', - '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', - 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', - 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', - 'X', 'Y', 'Z', '[', '\\', ']', '^', '_' +/* Conversion table. for base 64 */ +static char tbl_base64[64] = { + 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', + 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', + 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', + 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', + 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', + 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', + 'w', 'x', 'y', 'z', '0', '1', '2', '3', + '4', '5', '6', '7', '8', '9', '+', '/' }; -static const char uu_base64[64] = { - 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', - 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', - 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', - 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', - 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', - 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', - 'w', 'x', 'y', 'z', '0', '1', '2', '3', - '4', '5', '6', '7', '8', '9', '+', '/' +static char tbl_std[64] = { + '`', '!', '"', '#', '$', '%', '&', '\'', + '(', ')', '*', '+', ',', '-', '.', '/', + '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', ':', ';', '<', '=', '>', '?', + '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', + 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', + 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', + 'X', 'Y', 'Z', '[', '\\', ']', '^', '_' }; -/* ENC is the basic 1 character encoding function to make a char printing. */ -#define ENC(Char) (trans_ptr[(Char) & 077]) - -/* Copy from IN to OUT, encoding as you go along. */ -static void encode() +/* + * Encode the string S of length LENGTH to base64 format and place it + * to STORE. STORE will be 0-terminated, and must point to a writable + * buffer of at least 1+BASE64_LENGTH(length) bytes. + * where BASE64_LENGTH(len) = (4 * ((LENGTH + 2) / 3)) + */ +static void base64_encode (const char *s, const char *store, const int length, const char *tbl) { - register int ch, n; - char *p = NULL; - char buf[80]; - - while (1) { - n = 0; - do { - register int m = fread (buf, 1, 45 - n, stdin); - if (m == 0) - break; - n += m; - } - while (n < 45); - - if (n == 0) - break; - - if (trans_ptr == uu_std) - if (putchar (ENC (n)) == EOF) - break; - for (p = buf; n > 2; n -= 3, p += 3) { - ch = *p >> 2; - ch = ENC (ch); - if (putchar (ch) == EOF) - break; - ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017); - ch = ENC (ch); - if (putchar (ch) == EOF) - break; - ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03); - ch = ENC (ch); - if (putchar (ch) == EOF) - break; - ch = p[2] & 077; - ch = ENC (ch); - if (putchar (ch) == EOF) - break; - } - - if (n != 0) - break; - - if (putchar ('\n') == EOF) - break; - } - - while (n != 0) { - char c1 = *p; - char c2 = n == 1 ? 0 : p[1]; - - ch = c1 >> 2; - ch = ENC (ch); - if (putchar (ch) == EOF) - break; - - ch = ((c1 << 4) & 060) | ((c2 >> 4) & 017); - ch = ENC (ch); - if (putchar (ch) == EOF) - break; - - if (n == 1) - ch = trans_ptr == uu_std ? ENC ('\0') : '='; - else { - ch = (c2 << 2) & 074; - ch = ENC (ch); - } - if (putchar (ch) == EOF) - break; - ch = trans_ptr == uu_std ? ENC ('\0') : '='; - if (putchar (ch) == EOF) - break; - putchar ('\n'); - break; - } - - if (ferror (stdin)) - error_msg("Read error"); - - if (trans_ptr == uu_std) { - putchar (ENC ('\0')); - putchar ('\n'); - } + int i; + unsigned char *p = (unsigned char *)store; + + /* Transform the 3x8 bits to 4x6 bits, as required by base64. */ + for (i = 0; i < length; i += 3) { + *p++ = tbl[s[0] >> 2]; + *p++ = tbl[((s[0] & 3) << 4) + (s[1] >> 4)]; + *p++ = tbl[((s[1] & 0xf) << 2) + (s[2] >> 6)]; + *p++ = tbl[s[2] & 0x3f]; + s += 3; + } + /* Pad the result if necessary... */ + if (i == length + 1) { + *(p - 1) = '='; + } + else if (i == length + 2) { + *(p - 1) = *(p - 2) = '='; + } + /* ...and zero-terminate it. */ + *p = '\0'; } -int uuencode_main (int argc, - char **argv) +int uuencode_main(int argc, char **argv) { - int opt; - struct stat sb; - int mode; - - trans_ptr = uu_std; /* Standard encoding is old uu format */ - - /* Parse any options */ - while ((opt = getopt (argc, argv, "m")) > 0) { - switch (opt) { - case 'm': - trans_ptr = uu_base64; - break; - - default: - show_usage(); - } - } - - switch (argc - optind) { - case 2: - /* Optional first argument is input file. */ - if (!freopen (argv[optind], "r", stdin) || fstat (fileno (stdin), &sb)) { - perror_msg("%s", argv[optind]); - return EXIT_FAILURE; - } - mode = sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); - optind++; - break; - - case 1: - mode = RW & ~umask (RW); - break; - - case 0: - default: - show_usage(); - } - - printf("begin%s %o %s\n", trans_ptr == uu_std ? "" : "-base64", - mode, argv[optind]); - encode(); - printf(trans_ptr == uu_std ? "end\n" : "====\n"); - if (ferror (stdout)) { - error_msg("Write error"); - return EXIT_FAILURE; - } - return EXIT_SUCCESS; + const int src_buf_size = BUFSIZ; // This *MUST* be a multiple of 3 + const int dst_buf_size = 4 * ((src_buf_size + 2) / 3); + RESERVE_BB_BUFFER(src_buf, src_buf_size + 1); + RESERVE_BB_BUFFER(dst_buf, dst_buf_size + 1); + struct stat stat_buf; + FILE *src_stream = stdin; + char *tbl = tbl_std; + size_t size; + mode_t mode; + int opt; + int column = 0; + int write_size; + int remaining; + int buffer_offset = 0; + + while ((opt = getopt(argc, argv, "m")) != -1) { + switch (opt) { + case 'm': + tbl = tbl_base64; + break; + default: + show_usage(); + } + } + + switch (argc - optind) { + case 2: + src_stream = xfopen(argv[optind], "r"); + stat(argv[optind], &stat_buf); + mode = stat_buf.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); + if (src_stream == stdout) { + printf("NULL\n"); + } + break; + case 1: + mode = umask(0666); + break; + default: + show_usage(); + } + + printf("begin%s %o %s", tbl == tbl_std ? "" : "-base64", mode, argv[argc - 1]); + + while ((size = fread(src_buf, 1, src_buf_size, src_stream)) > 0) { + /* Encode the buffer we just read in */ + base64_encode(src_buf, dst_buf, size, tbl); + + /* Write the buffer to stdout, wrapping at 60 chars. + * This looks overly complex, but it gets tricky as + * the line has to continue to wrap correctly if we + * have to refill the buffer + * + * Improvments most welcome + */ + + /* Initialise values for the new buffer */ + remaining = 4 * ((size + 2) / 3); + buffer_offset = 0; + if (remaining > (60 - column)) { + write_size = 60 - column; + } + else if (remaining < 60) { + write_size = remaining; + } else { + write_size = 60; + } + + /* Write the buffer to stdout, wrapping at 60 chars + * starting from the column the last buffer ran out + */ + do { + /* Setup a new row if required */ + if (column == 0) { + putchar('\n'); + if (tbl == tbl_std) { + putchar('M'); + } + } + /* Write to the 60th column */ + if (fwrite(&dst_buf[buffer_offset], 1, write_size, stdout) != write_size) { + perror("Couldnt finish writing"); + } + /* Update variables based on last write */ + buffer_offset += write_size; + remaining -= write_size; + column += write_size; + if (column % 60 == 0) { + column = 0; + } + + /* working next amount to write */ + write_size = (60 - column) % 60; + if (write_size < remaining) { + write_size = remaining; + } + if (write_size == 0) { + write_size = 60; + } + } while (remaining > 0); + } + printf(tbl == tbl_std ? "\n`\nend\n" : "\n====\n"); + + return(EXIT_SUCCESS); } - -/* Copyright (c) 1983 Regents of the University of California. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change - * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change> - * - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - - |