89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
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/* vi: set sw=4 ts=4: */
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/*
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* Copyright (C) 2006 Michael Opdenacker <michael@free-electrons.com>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//config:config TS
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//config: bool "ts (450 bytes)"
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//config: default y
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//applet:IF_TS(APPLET(ts, BB_DIR_USR_BIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_TS) += ts.o
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//usage:#define ts_trivial_usage
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//usage: "[-is] [STRFTIME]"
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//usage:#define ts_full_usage ""
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#include "libbb.h"
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#include "common_bufsiz.h"
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# include <sys/syscall.h>
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int ts_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int ts_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
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{
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struct timespec base;
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unsigned opt;
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char *frac;
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char *fmt_dt2str;
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char *line;
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opt = getopt32(argv, "^" "is" "\0" "?1" /*max one arg*/);
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if (opt) {
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putenv((char*)"TZ=UTC0");
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tzset();
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}
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/*argc -= optind;*/
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argv += optind;
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fmt_dt2str = argv[0] ? argv[0]
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: (char*)(opt ? "%b %d %H:%M:%S"+6 : "%b %d %H:%M:%S");
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frac = is_suffixed_with(fmt_dt2str, "%.S");
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if (!frac)
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frac = is_suffixed_with(fmt_dt2str, "%.s");
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if (frac) {
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frac++;
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strcpy(frac, frac + 1);
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}
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#define date_buf bb_common_bufsiz1
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setup_common_bufsiz();
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syscall(__NR_clock_gettime, CLOCK_REALTIME, &base);
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while ((line = xmalloc_fgets(stdin)) != NULL) {
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struct timespec ts;
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struct tm tm_time;
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/* libc has incredibly messy way of doing this,
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* typically requiring -lrt. We just skip all this mess
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*/
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syscall(__NR_clock_gettime, CLOCK_REALTIME, &ts);
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if (opt) {
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/* -i and/or -s */
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struct timespec ts1 = ts1;
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if (opt & 1) /* -i */
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ts1 = ts;
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//printf("%d %d\n", ts.tv_sec, base.tv_sec);
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ts.tv_sec -= base.tv_sec;
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//printf("%d %d\n", ts.tv_sec, base.tv_sec);
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ts.tv_nsec -= base.tv_nsec;
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if ((int32_t)(ts.tv_nsec) < 0) {
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ts.tv_sec--;
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ts.tv_nsec += 1000*1000*1000;
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}
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if (opt & 1) /* -i */
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base = ts1;
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localtime_r(&ts.tv_sec, &tm_time);
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}
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strftime(date_buf, COMMON_BUFSIZE, fmt_dt2str, &tm_time);
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if (!frac) {
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printf("%s %s", date_buf, line);
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} else {
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printf("%s.%06u %s", date_buf, (unsigned)ts.tv_nsec / 1000u, line);
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}
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free(line);
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}
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return EXIT_SUCCESS;
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}
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