16df5e8e6
Denys Vlasenko
2019-03-26
Subject
ts: new applet
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Commit Diff GitHub →
miscutils/ts.c+88 -0
| @@ -0,0 +1,88 @@ | |
| + | /* vi: set sw=4 ts=4: */ |
| + | /* |
| + | * Copyright (C) 2006 Michael Opdenacker <[email protected]> |
| + | * |
| + | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| + | */ |
| + | //config:config TS |
| + | //config: bool "ts (450 bytes)" |
| + | //config: default y |
| + | |
| + | //applet:IF_TS(APPLET(ts, BB_DIR_USR_BIN, BB_SUID_DROP)) |
| + | |
| + | //kbuild:lib-$(CONFIG_TS) += ts.o |
| + | |
| + | //usage:#define ts_trivial_usage |
| + | //usage: "[-is] [STRFTIME]" |
| + | //usage:#define ts_full_usage "" |
| + | |
| + | #include "libbb.h" |
| + | #include "common_bufsiz.h" |
| + | # include <sys/syscall.h> |
| + | |
| + | int ts_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| + | int ts_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) |
| + | { |
| + | struct timespec base; |
| + | unsigned opt; |
| + | char *frac; |
| + | char *fmt_dt2str; |
| + | char *line; |
| + | |
| + | opt = getopt32(argv, "^" "is" "\0" "?1" /*max one arg*/); |
| + | if (opt) { |
| + | putenv((char*)"TZ=UTC0"); |
| + | tzset(); |
| + | } |
| + | /*argc -= optind;*/ |
| + | argv += optind; |
| + | fmt_dt2str = argv[0] ? argv[0] |
| + | : (char*)(opt ? "%b %d %H:%M:%S"+6 : "%b %d %H:%M:%S"); |
| + | frac = is_suffixed_with(fmt_dt2str, "%.S"); |
| + | if (!frac) |
| + | frac = is_suffixed_with(fmt_dt2str, "%.s"); |
| + | if (frac) { |
| + | frac++; |
| + | strcpy(frac, frac + 1); |
| + | } |
| + | |
| + | #define date_buf bb_common_bufsiz1 |
| + | setup_common_bufsiz(); |
| + | syscall(__NR_clock_gettime, CLOCK_REALTIME, &base); |
| + | |
| + | while ((line = xmalloc_fgets(stdin)) != NULL) { |
| + | struct timespec ts; |
| + | struct tm tm_time; |
| + | |
| + | /* libc has incredibly messy way of doing this, |
| + | * typically requiring -lrt. We just skip all this mess |
| + | */ |
| + | syscall(__NR_clock_gettime, CLOCK_REALTIME, &ts); |
| + | if (opt) { |
| + | /* -i and/or -s */ |
| + | struct timespec ts1 = ts1; |
| + | if (opt & 1) /* -i */ |
| + | ts1 = ts; |
| + | //printf("%d %d\n", ts.tv_sec, base.tv_sec); |
| + | ts.tv_sec -= base.tv_sec; |
| + | //printf("%d %d\n", ts.tv_sec, base.tv_sec); |
| + | ts.tv_nsec -= base.tv_nsec; |
| + | if ((int32_t)(ts.tv_nsec) < 0) { |
| + | ts.tv_sec--; |
| + | ts.tv_nsec += 1000*1000*1000; |
| + | } |
| + | if (opt & 1) /* -i */ |
| + | base = ts1; |
| + | localtime_r(&ts.tv_sec, &tm_time); |
| + | } |
| + | strftime(date_buf, COMMON_BUFSIZE, fmt_dt2str, &tm_time); |
| + | if (!frac) { |
| + | printf("%s %s", date_buf, line); |
| + | } else { |
| + | printf("%s.%06u %s", date_buf, (unsigned)ts.tv_nsec / 1000u, line); |
| + | } |
| + | free(line); |
| + | } |
| + | |
| + | return EXIT_SUCCESS; |
| + | } |