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| author | Denys Vlasenko | 2010-06-04 18:19:15 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2010-06-04 18:19:15 +0200 |
| commit | 6c2406ac861f42536acb76606c90412324a0e733 (patch) | |
| tree | e5a06a205f1590eadb267a78bb3a706f359243d3 /coreutils/date.c | |
| parent | 8878c24c7d15fe0d4df73aa8477251c6583f5157 (diff) | |
| download | busybox-6c2406ac861f42536acb76606c90412324a0e733.zip busybox-6c2406ac861f42536acb76606c90412324a0e733.tar.gz | |
date: optional support for %N. Closes bug 1861.
function old new delta
date_main 862 1090 +228
clock_gettime - 41 +41
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 1/0 up/down: 269/0) Total: 269 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'coreutils/date.c')
| -rw-r--r-- | coreutils/date.c | 59 |
1 files changed, 53 insertions, 6 deletions
diff --git a/coreutils/date.c b/coreutils/date.c index 4e5b3b0..c1390be 100644 --- a/coreutils/date.c +++ b/coreutils/date.c @@ -84,9 +84,9 @@ static const char date_longopts[] ALIGN1 = int date_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int date_main(int argc UNUSED_PARAM, char **argv) { + struct timespec ts; struct tm tm_time; char buf_fmt_dt2str[64]; - time_t tm; unsigned opt; int ifmt = -1; char *date_str; @@ -161,11 +161,18 @@ int date_main(int argc UNUSED_PARAM, char **argv) if (opt & OPT_REFERENCE) { struct stat statbuf; xstat(filename, &statbuf); - tm = statbuf.st_mtime; + ts.tv_sec = statbuf.st_mtime; +#if ENABLE_FEATURE_DATE_NANO + ts.tv_nsec = statbuf.st_mtimensec; //or st_atim.tv_nsec? +#endif } else { - time(&tm); +#if ENABLE_FEATURE_DATE_NANO + clock_gettime(CLOCK_REALTIME, &ts); +#else + time(&ts.tv_nsec); +#endif } - localtime_r(&tm, &tm_time); + localtime_r(&ts.tv_sec, &tm_time); /* If date string is given, update tm_time, and maybe set date */ if (date_str != NULL) { @@ -184,12 +191,12 @@ int date_main(int argc UNUSED_PARAM, char **argv) /* Correct any day of week and day of year etc. fields */ tm_time.tm_isdst = -1; /* Be sure to recheck dst */ - tm = validate_tm_time(date_str, &tm_time); + ts.tv_sec = validate_tm_time(date_str, &tm_time); maybe_set_utc(opt); /* if setting time, set it */ - if ((opt & OPT_SET) && stime(&tm) < 0) { + if ((opt & OPT_SET) && stime(&ts.tv_sec) < 0) { bb_perror_msg("can't set date"); } } @@ -222,6 +229,46 @@ int date_main(int argc UNUSED_PARAM, char **argv) fmt_dt2str = (char*)"%a %b %e %H:%M:%S %Z %Y"; } } +#if ENABLE_FEATURE_DATE_NANO + else { + /* User-specified fmt_dt2str */ + /* Search for and process "%N" */ + char *p = fmt_dt2str; + while ((p = strchr(p, '%')) != NULL) { + int n, m; + unsigned pres, scale; + + p++; + if (*p == '%') { + p++; + continue; + } + n = strspn(p, "0123456789"); + if (p[n] != 'N') { + p += n; + continue; + } + /* We have "%[nnn]N" */ + p[-1] = '\0'; + p[n] = '\0'; + scale = 1; + pres = 9; + if (n) { + pres = xatoi_u(p); + if (pres == 0) + pres = 9; + m = 9 - pres; + while (--m >= 0) + scale *= 10; + } + + m = p - fmt_dt2str; + p += n + 1; + fmt_dt2str = xasprintf("%s%0*u%s", fmt_dt2str, pres, (unsigned)ts.tv_nsec / scale, p); + p = fmt_dt2str + m; + } + } +#endif #define date_buf bb_common_bufsiz1 if (*fmt_dt2str == '\0') { |