mirror of
https://github.com/sheumann/hush.git
synced 2024-11-05 06:07:00 +00:00
1d42665b6b
function old new delta getopt32 1370 1385 +15 sulogin_main 490 494 +4 realpath_main 84 86 +2 sleep_main 76 77 +1 mt_main 256 257 +1 printenv_main 75 74 -1 fdformat_main 546 545 -1 usleep_main 44 42 -2 setlogcons_main 77 75 -2 ed_main 2654 2649 -5 deallocvt_main 69 64 -5 addgroup_main 373 368 -5 mkfs_minix_main 2989 2982 -7 tail_main 1221 1213 -8 sv_main 1254 1241 -13 du_main 348 328 -20 tftp_main 325 302 -23 split_main 581 558 -23 nc_main 1000 977 -23 diff_main 891 868 -23 arping_main 1797 1770 -27 ls_main 893 847 -46 od_main 2797 2750 -47 readprofile_main 1944 1895 -49 tcpudpsvd_main 1973 1922 -51 udhcpc_main 2590 2513 -77 grep_main 824 722 -102 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 5/22 up/down: 23/-560) Total: -537 bytes text data bss dec hex filename 796973 658 7428 805059 c48c3 busybox_old 796479 662 7420 804561 c46d1 busybox_unstripped
140 lines
3.0 KiB
C
140 lines
3.0 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* split - split a file into pieces
|
|
* Copyright (c) 2007 Bernhard Fischer
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
|
*/
|
|
/* BB_AUDIT: SUSv3 compliant
|
|
* SUSv3 requirements:
|
|
* http://www.opengroup.org/onlinepubs/009695399/utilities/split.html
|
|
*/
|
|
#include "libbb.h"
|
|
|
|
static const struct suffix_mult split_suffices[] = {
|
|
#if ENABLE_FEATURE_SPLIT_FANCY
|
|
{ "b", 512 },
|
|
#endif
|
|
{ "k", 1024 },
|
|
{ "m", 1024*1024 },
|
|
#if ENABLE_FEATURE_SPLIT_FANCY
|
|
{ "g", 1024*1024*1024 },
|
|
#endif
|
|
{ }
|
|
};
|
|
|
|
/* Increment the suffix part of the filename.
|
|
* Returns NULL if we are out of filenames.
|
|
*/
|
|
static char *next_file(char *old, unsigned suffix_len)
|
|
{
|
|
size_t end = strlen(old);
|
|
unsigned i = 1;
|
|
char *curr;
|
|
|
|
do {
|
|
curr = old + end - i;
|
|
if (*curr < 'z') {
|
|
*curr += 1;
|
|
break;
|
|
}
|
|
i++;
|
|
if (i > suffix_len) {
|
|
return NULL;
|
|
}
|
|
*curr = 'a';
|
|
} while (1);
|
|
|
|
return old;
|
|
}
|
|
|
|
#define read_buffer bb_common_bufsiz1
|
|
enum { READ_BUFFER_SIZE = COMMON_BUFSIZE - 1 };
|
|
|
|
#define SPLIT_OPT_l (1<<0)
|
|
#define SPLIT_OPT_b (1<<1)
|
|
#define SPLIT_OPT_a (1<<2)
|
|
|
|
int split_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int split_main(int argc ATTRIBUTE_UNUSED, char **argv)
|
|
{
|
|
unsigned suffix_len = 2;
|
|
char *pfx;
|
|
char *count_p;
|
|
const char *sfx;
|
|
off_t cnt = 1000;
|
|
off_t remaining = 0;
|
|
unsigned opt;
|
|
ssize_t bytes_read, to_write;
|
|
char *src;
|
|
|
|
opt_complementary = "?2:a+"; /* max 2 args; -a N */
|
|
opt = getopt32(argv, "l:b:a:", &count_p, &count_p, &suffix_len);
|
|
|
|
if (opt & SPLIT_OPT_l)
|
|
cnt = XATOOFF(count_p);
|
|
if (opt & SPLIT_OPT_b) // FIXME: also needs XATOOFF
|
|
cnt = xatoull_sfx(count_p, split_suffices);
|
|
sfx = "x";
|
|
|
|
argv += optind;
|
|
if (argv[0]) {
|
|
if (argv[1])
|
|
sfx = argv[1];
|
|
xmove_fd(xopen(argv[0], O_RDONLY), 0);
|
|
} else {
|
|
argv[0] = (char *) bb_msg_standard_input;
|
|
}
|
|
|
|
if (NAME_MAX < strlen(sfx) + suffix_len)
|
|
bb_error_msg_and_die("suffix too long");
|
|
|
|
{
|
|
char *char_p = xzalloc(suffix_len + 1);
|
|
memset(char_p, 'a', suffix_len);
|
|
pfx = xasprintf("%s%s", sfx, char_p);
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
free(char_p);
|
|
}
|
|
|
|
while (1) {
|
|
bytes_read = safe_read(0, read_buffer, READ_BUFFER_SIZE);
|
|
if (!bytes_read)
|
|
break;
|
|
if (bytes_read < 0)
|
|
bb_simple_perror_msg_and_die(argv[0]);
|
|
src = read_buffer;
|
|
do {
|
|
if (!remaining) {
|
|
if (!pfx)
|
|
bb_error_msg_and_die("suffixes exhausted");
|
|
xmove_fd(xopen(pfx, O_WRONLY | O_CREAT | O_TRUNC), 1);
|
|
pfx = next_file(pfx, suffix_len);
|
|
remaining = cnt;
|
|
}
|
|
|
|
if (opt & SPLIT_OPT_b) {
|
|
/* split by bytes */
|
|
to_write = (bytes_read < remaining) ? bytes_read : remaining;
|
|
remaining -= to_write;
|
|
} else {
|
|
/* split by lines */
|
|
/* can be sped up by using _memrchr_
|
|
* and writing many lines at once... */
|
|
char *end = memchr(src, '\n', bytes_read);
|
|
if (end) {
|
|
--remaining;
|
|
to_write = end - src + 1;
|
|
} else {
|
|
to_write = bytes_read;
|
|
}
|
|
}
|
|
|
|
xwrite(1, src, to_write);
|
|
bytes_read -= to_write;
|
|
src += to_write;
|
|
} while (bytes_read);
|
|
}
|
|
return EXIT_SUCCESS;
|
|
}
|