busybox/coreutils/date.c

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/* vi: set sw=4 ts=4: */
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/*
* Mini date implementation for busybox
*
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* by Matthew Grant <grantma@anathoth.gen.nz>
*
* iso-format handling added by Robert Griebl <griebl@gmx.de>
* bugfixes and cleanup by Bernhard Reutner-Fischer
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*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/* This 'date' command supports only 2 time setting formats,
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all the GNU strftime stuff (its in libc, lets use it),
setting time using UTC and displaying it, as well as
an RFC 2822 compliant date output for shell scripting
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mail commands */
/* Input parsing code is always bulky - used heavy duty libc stuff as
much as possible, missed out a lot of bounds checking */
//config:config DATE
//config: bool "date (7 kb)"
//config: default y
//config: help
//config: date is used to set the system date or display the
//config: current time in the given format.
//config:
//config:config FEATURE_DATE_ISOFMT
//config: bool "Enable ISO date format output (-I)"
//config: default y
//config: depends on DATE
//config: help
//config: Enable option (-I) to output an ISO-8601 compliant
//config: date/time string.
//config:
//config:# defaults to "no": stat's nanosecond field is a bit non-portable
//config:config FEATURE_DATE_NANO
//config: bool "Support %[num]N nanosecond format specifier"
//config: default n # syscall(__NR_clock_gettime)
//config: depends on DATE
//config: select PLATFORM_LINUX
//config: help
//config: Support %[num]N format specifier. Adds ~250 bytes of code.
//config:
//config:config FEATURE_DATE_COMPAT
//config: bool "Support weird 'date MMDDhhmm[[YY]YY][.ss]' format"
//config: default y
//config: depends on DATE
//config: help
//config: System time can be set by 'date -s DATE' and simply 'date DATE',
//config: but formats of DATE string are different. 'date DATE' accepts
//config: a rather weird MMDDhhmm[[YY]YY][.ss] format with completely
//config: unnatural placement of year between minutes and seconds.
//config: date -s (and other commands like touch -d) use more sensible
//config: formats (for one, ISO format YYYY-MM-DD hh:mm:ss.ssssss).
//config:
//config: With this option off, 'date DATE' and 'date -s DATE' support
//config: the same format. With it on, 'date DATE' additionally supports
//config: MMDDhhmm[[YY]YY][.ss] format.
//applet:IF_DATE(APPLET_NOEXEC(date, date, BB_DIR_BIN, BB_SUID_DROP, date))
/* bb_common_bufsiz1 usage here is safe wrt NOEXEC: not expecting it to be zeroed. */
//kbuild:lib-$(CONFIG_DATE) += date.o
/* GNU coreutils 6.9 man page:
* date [OPTION]... [+FORMAT]
* date [-u|--utc|--universal] [MMDDhhmm[[CC]YY][.ss]]
* -d, --date=STRING
* display time described by STRING, not 'now'
* -f, --file=DATEFILE
* like --date once for each line of DATEFILE
* -r, --reference=FILE
* display the last modification time of FILE
* -R, --rfc-2822
* output date and time in RFC 2822 format.
* Example: Mon, 07 Aug 2006 12:34:56 -0600
* --rfc-3339=TIMESPEC
* output date and time in RFC 3339 format.
* TIMESPEC='date', 'seconds', or 'ns'
* Date and time components are separated by a single space:
* 2006-08-07 12:34:56-06:00
* -s, --set=STRING
* set time described by STRING
* -u, --utc, --universal
* print or set Coordinated Universal Time
*
* Busybox:
* long options are not supported
* -f is not supported
* -I seems to roughly match --rfc-3339, but -I has _optional_ param
* (thus "-I seconds" doesn't work, only "-Iseconds"),
* and does not support -Ins
* -D FMT is a bbox extension for _input_ conversion of -d DATE
*/
//usage:#define date_trivial_usage
//usage: "[OPTIONS] [+FMT] [TIME]"
//usage:#define date_full_usage "\n\n"
//usage: "Display time (using +FMT), or set time\n"
//usage: IF_NOT_LONG_OPTS(
//usage: "\n [-s] TIME Set time to TIME"
//usage: "\n -u Work in UTC (don't convert to local time)"
//usage: "\n -R Output RFC-2822 compliant date string"
//usage: ) IF_LONG_OPTS(
//usage: "\n [-s,--set] TIME Set time to TIME"
//usage: "\n -u,--utc Work in UTC (don't convert to local time)"
//usage: "\n -R,--rfc-2822 Output RFC-2822 compliant date string"
//usage: )
//usage: IF_FEATURE_DATE_ISOFMT(
//usage: "\n -I[SPEC] Output ISO-8601 compliant date string"
//usage: "\n SPEC='date' (default) for date only,"
//usage: "\n 'hours', 'minutes', or 'seconds' for date and"
//usage: "\n time to the indicated precision"
//usage: )
//usage: IF_NOT_LONG_OPTS(
//usage: "\n -r FILE Display last modification time of FILE"
//usage: "\n -d TIME Display TIME, not 'now'"
//usage: ) IF_LONG_OPTS(
//usage: "\n -r,--reference FILE Display last modification time of FILE"
//usage: "\n -d,--date TIME Display TIME, not 'now'"
//usage: )
//usage: IF_FEATURE_DATE_ISOFMT(
//usage: "\n -D FMT Use FMT (strptime format) for -d TIME conversion"
//usage: )
//usage: "\n"
//usage: "\nRecognized TIME formats:"
//usage: "\n hh:mm[:ss]"
//usage: "\n [YYYY.]MM.DD-hh:mm[:ss]"
//usage: "\n YYYY-MM-DD hh:mm[:ss]"
//usage: "\n [[[[[YY]YY]MM]DD]hh]mm[.ss]"
//usage: IF_FEATURE_DATE_COMPAT(
//usage: "\n 'date TIME' form accepts MMDDhhmm[[YY]YY][.ss] instead"
//usage: )
//usage:
//usage:#define date_example_usage
//usage: "$ date\n"
//usage: "Wed Apr 12 18:52:41 MDT 2000\n"
#include "libbb.h"
#include "common_bufsiz.h"
#if ENABLE_FEATURE_DATE_NANO
# include <sys/syscall.h>
#endif
enum {
OPT_RFC2822 = (1 << 0), /* R */
OPT_SET = (1 << 1), /* s */
OPT_UTC = (1 << 2), /* u */
OPT_DATE = (1 << 3), /* d */
OPT_REFERENCE = (1 << 4), /* r */
OPT_TIMESPEC = (1 << 5) * ENABLE_FEATURE_DATE_ISOFMT, /* I */
OPT_HINT = (1 << 6) * ENABLE_FEATURE_DATE_ISOFMT, /* D */
};
#if ENABLE_LONG_OPTS
static const char date_longopts[] ALIGN1 =
"rfc-822\0" No_argument "R"
"rfc-2822\0" No_argument "R"
"set\0" Required_argument "s"
"utc\0" No_argument "u"
/* "universal\0" No_argument "u" */
"date\0" Required_argument "d"
"reference\0" Required_argument "r"
;
#endif
/* We are a NOEXEC applet.
* Obstacles to NOFORK:
* - we change env
* - xasprintf result not freed
* - after xasprintf we use other xfuncs
*/
static void maybe_set_utc(int opt)
{
if (opt & OPT_UTC)
putenv((char*)"TZ=UTC0");
}
int date_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int date_main(int argc UNUSED_PARAM, char **argv)
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{
struct timespec ts;
struct tm tm_time;
char buf_fmt_dt2str[64];
unsigned opt;
int ifmt = -1;
char *date_str;
char *fmt_dt2str;
char *fmt_str2dt;
char *filename;
char *isofmt_arg = NULL;
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getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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opt = getopt32long(argv, "^"
"Rs:ud:r:"
IF_FEATURE_DATE_ISOFMT("I::D:")
"\0"
"d--s:s--d"
IF_FEATURE_DATE_ISOFMT(":R--I:I--R"),
date_longopts,
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&date_str, &date_str, &filename
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
IF_FEATURE_DATE_ISOFMT(, &isofmt_arg, &fmt_str2dt)
);
argv += optind;
maybe_set_utc(opt);
if (ENABLE_FEATURE_DATE_ISOFMT && (opt & OPT_TIMESPEC)) {
ifmt = 0; /* default is date */
if (isofmt_arg) {
static const char isoformats[] ALIGN1 =
"date\0""hours\0""minutes\0""seconds\0"; /* ns? */
ifmt = index_in_substrings(isoformats, isofmt_arg);
if (ifmt < 0)
bb_show_usage();
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}
}
fmt_dt2str = NULL;
if (argv[0] && argv[0][0] == '+') {
fmt_dt2str = &argv[0][1]; /* skip over the '+' */
argv++;
}
if (!(opt & (OPT_SET | OPT_DATE))) {
opt |= OPT_SET;
date_str = argv[0]; /* can be NULL */
if (date_str) {
#if ENABLE_FEATURE_DATE_COMPAT
int len = strspn(date_str, "0123456789");
if (date_str[len] == '\0'
|| (date_str[len] == '.'
&& isdigit(date_str[len+1])
&& isdigit(date_str[len+2])
&& date_str[len+3] == '\0'
)
) {
/* Dreaded MMDDhhmm[[CC]YY][.ss] format!
* It does not match -d or -s format.
* Some users actually do use it.
*/
len -= 8;
if (len < 0 || len > 4 || (len & 1))
bb_error_msg_and_die(bb_msg_invalid_date, date_str);
if (len != 0) { /* move YY or CCYY to front */
char buf[4];
memcpy(buf, date_str + 8, len);
memmove(date_str + len, date_str, 8);
memcpy(date_str, buf, len);
}
}
#endif
argv++;
}
}
if (*argv)
bb_show_usage();
/* Now we have parsed all the information except the date format
* which depends on whether the clock is being set or read */
if (opt & OPT_REFERENCE) {
struct stat statbuf;
xstat(filename, &statbuf);
ts.tv_sec = statbuf.st_mtime;
#if ENABLE_FEATURE_DATE_NANO
ts.tv_nsec = statbuf.st_mtim.tv_nsec;
/* Some toolchains use .st_mtimensec instead of st_mtim.tv_nsec.
* If you need #define _SVID_SOURCE 1 to enable st_mtim.tv_nsec,
* drop a mail to project mailing list please
*/
#endif
} else {
#if ENABLE_FEATURE_DATE_NANO
/* libc has incredibly messy way of doing this,
* typically requiring -lrt. We just skip all this mess */
syscall(__NR_clock_gettime, CLOCK_REALTIME, &ts);
#else
time(&ts.tv_sec);
#endif
}
localtime_r(&ts.tv_sec, &tm_time);
/* If date string is given, update tm_time, and maybe set date */
if (date_str != NULL) {
/* Zero out fields - take her back to midnight! */
tm_time.tm_sec = 0;
tm_time.tm_min = 0;
tm_time.tm_hour = 0;
/* Process any date input to UNIX time since 1 Jan 1970 */
if (ENABLE_FEATURE_DATE_ISOFMT && (opt & OPT_HINT)) {
if (strptime(date_str, fmt_str2dt, &tm_time) == NULL)
bb_error_msg_and_die(bb_msg_invalid_date, date_str);
} else {
parse_datestr(date_str, &tm_time);
}
/* Correct any day of week and day of year etc. fields */
/* Be sure to recheck dst (but not if date is time_t format) */
if (date_str[0] != '@')
tm_time.tm_isdst = -1;
ts.tv_sec = validate_tm_time(date_str, &tm_time);
/* if setting time, set it */
if ((opt & OPT_SET) && stime(&ts.tv_sec) < 0) {
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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bb_simple_perror_msg("can't set date");
}
}
/* Display output */
/* Deal with format string */
if (fmt_dt2str == NULL) {
int i;
fmt_dt2str = buf_fmt_dt2str;
if (ENABLE_FEATURE_DATE_ISOFMT && ifmt >= 0) {
/* -I[SPEC]: 0:date 1:hours 2:minutes 3:seconds */
strcpy(fmt_dt2str, "%Y-%m-%dT%H:%M:%S");
i = 8 + 3 * ifmt;
if (ifmt != 0) {
/* TODO: if (ifmt==4) i += sprintf(&fmt_dt2str[i], ",%09u", nanoseconds); */
format_utc:
fmt_dt2str[i++] = '%';
fmt_dt2str[i++] = (opt & OPT_UTC) ? 'Z' : 'z';
}
fmt_dt2str[i] = '\0';
} else if (opt & OPT_RFC2822) {
/* -R. undo busybox.c setlocale */
if (ENABLE_LOCALE_SUPPORT)
setlocale(LC_TIME, "C");
strcpy(fmt_dt2str, "%a, %d %b %Y %H:%M:%S ");
i = sizeof("%a, %d %b %Y %H:%M:%S ")-1;
goto format_utc;
} else { /* default case */
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_positive(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
setup_common_bufsiz();
if (*fmt_dt2str == '\0') {
/* With no format string, just print a blank line */
date_buf[0] = '\0';
} else {
/* Handle special conversions */
libbb: introduce and use is_prefixed_with() function old new delta is_prefixed_with - 18 +18 complete_username 78 77 -1 man_main 737 735 -2 fsck_device 429 427 -2 unpack_ar_archive 80 76 -4 strip_unsafe_prefix 105 101 -4 singlemount 1054 1050 -4 rtc_adjtime_is_utc 90 86 -4 resolve_mount_spec 88 84 -4 parse_one_line 1029 1025 -4 parse_conf 1460 1456 -4 may_wakeup 83 79 -4 loadkmap_main 219 215 -4 get_irqs_from_stat 103 99 -4 get_header_cpio 913 909 -4 findfs_main 79 75 -4 fbsplash_main 1230 1226 -4 load_crontab 776 771 -5 expand_vars_to_list 1151 1146 -5 date_main 881 876 -5 skip_dev_pfx 30 24 -6 make_device 2199 2193 -6 complete_cmd_dir_file 773 767 -6 run_applet_and_exit 715 708 -7 uudecode_main 321 313 -8 pwdx_main 197 189 -8 execute 568 560 -8 i2cdetect_main 1186 1176 -10 procps_scan 1242 1230 -12 procps_read_smaps 1017 1005 -12 process_module 746 734 -12 patch_main 1903 1891 -12 nfsmount 3572 3560 -12 stack_machine 126 112 -14 process_timer_stats 449 435 -14 match_fstype 111 97 -14 do_ipaddr 1344 1330 -14 open_list_and_close 359 343 -16 get_header_tar 1795 1779 -16 prepend_new_eth_table 340 323 -17 fsck_main 1811 1794 -17 find_iface_state 56 38 -18 dnsd_main 1321 1303 -18 base_device 179 158 -21 find_keyword 104 82 -22 handle_incoming_and_exit 2785 2762 -23 parse_and_put_prompt 774 746 -28 modinfo 347 317 -30 find_action 204 171 -33 update_passwd 1470 1436 -34 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/49 up/down: 18/-540) Total: -522 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-03-12 22:18:34 +05:30
if (is_prefixed_with(fmt_dt2str, "%f")) {
fmt_dt2str = (char*)"%Y.%m.%d-%H:%M:%S";
}
/* Generate output string */
strftime(date_buf, COMMON_BUFSIZE, fmt_dt2str, &tm_time);
}
puts(date_buf);
return EXIT_SUCCESS;
1999-10-05 21:54:54 +05:30
}