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237bedd499
In many cases, this aqllows to drop use of opt_complementary. Approximately -400 bytes: function old new delta getopt32 1423 1502 +79 opt_string 17 18 +1 OPT_STR 24 25 +1 uniq_main 416 406 -10 timeout_main 279 269 -10 sulogin_main 270 260 -10 readprofile_main 1825 1815 -10 ps_main 543 533 -10 pidof_main 245 235 -10 pgrep_main 611 601 -10 od_main 2600 2590 -10 mkfs_minix_main 2684 2674 -10 mkfs_ext2_main 2603 2593 -10 microcom_main 712 702 -10 makemime_main 315 305 -10 ionice_main 282 272 -10 inetd_main 2074 2064 -10 ifplugd_main 1144 1134 -10 halt_main 353 343 -10 getopt_main 636 626 -10 fdisk_main 2854 2844 -10 env_main 206 196 -10 dmesg_main 319 309 -10 conspy_main 1214 1204 -10 awk_main 981 971 -10 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/22 up/down: 81/-220) Total: -139 bytes text data bss dec hex filename 919373 906 14060 934339 e41c3 busybox_old 918969 906 14060 933935 e402f busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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*
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* dmesg - display/control kernel ring buffer.
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*
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* Copyright 2006 Rob Landley <rob@landley.net>
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* Copyright 2006 Bernhard Reutner-Fischer <rep.nop@aon.at>
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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//usage:#define dmesg_trivial_usage
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//usage: "[-c] [-n LEVEL] [-s SIZE]"
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//usage:#define dmesg_full_usage "\n\n"
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//usage: "Print or control the kernel ring buffer\n"
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//usage: "\n -c Clear ring buffer after printing"
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//usage: "\n -n LEVEL Set console logging level"
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//usage: "\n -s SIZE Buffer size"
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//usage: "\n -r Print raw message buffer"
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#include <sys/klog.h>
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#include "libbb.h"
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int dmesg_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int dmesg_main(int argc UNUSED_PARAM, char **argv)
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{
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int len, level;
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char *buf;
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unsigned opts;
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enum {
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OPT_c = 1 << 0,
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OPT_s = 1 << 1,
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OPT_n = 1 << 2,
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OPT_r = 1 << 3
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};
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opts = getopt32(argv, "cs:+n:+r", &len, &level);
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if (opts & OPT_n) {
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if (klogctl(8, NULL, (long) level))
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bb_perror_msg_and_die("klogctl");
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return EXIT_SUCCESS;
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}
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if (!(opts & OPT_s))
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len = klogctl(10, NULL, 0); /* read ring buffer size */
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if (len < 16*1024)
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len = 16*1024;
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if (len > 16*1024*1024)
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len = 16*1024*1024;
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buf = xmalloc(len);
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len = klogctl(3 + (opts & OPT_c), buf, len); /* read ring buffer */
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if (len < 0)
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bb_perror_msg_and_die("klogctl");
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if (len == 0)
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return EXIT_SUCCESS;
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if (ENABLE_FEATURE_DMESG_PRETTY && !(opts & OPT_r)) {
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int last = '\n';
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int in = 0;
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/* Skip <[0-9]+> at the start of lines */
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while (1) {
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if (last == '\n' && buf[in] == '<') {
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while (buf[in++] != '>' && in < len)
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;
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} else {
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last = buf[in++];
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putchar(last);
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}
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if (in >= len)
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break;
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}
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/* Make sure we end with a newline */
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if (last != '\n')
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bb_putchar('\n');
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} else {
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full_write(STDOUT_FILENO, buf, len);
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if (buf[len-1] != '\n')
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bb_putchar('\n');
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}
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if (ENABLE_FEATURE_CLEAN_UP) free(buf);
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return EXIT_SUCCESS;
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}
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