22542eca18
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>
108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* The Rdate command will ask a time server for the RFC 868 time
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* and optionally set the system time.
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*
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* by Sterling Huxley <sterling@europa.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 RDATE
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//config: bool "rdate (6 kb)"
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//config: default y
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//config: help
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//config: The rdate utility allows you to synchronize the date and time of your
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//config: system clock with the date and time of a remote networked system using
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//config: the RFC868 protocol, which is built into the inetd daemon on most
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//config: systems.
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//applet:IF_RDATE(APPLET(rdate, BB_DIR_USR_SBIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_RDATE) += rdate.o
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//usage:#define rdate_trivial_usage
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//usage: "[-s/-p] HOST"
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//usage:#define rdate_full_usage "\n\n"
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//usage: "Set and print time from HOST using RFC 868\n"
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//usage: "\n -s Only set system time"
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//usage: "\n -p Only print time"
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#include "libbb.h"
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enum { RFC_868_BIAS = 2208988800UL };
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static void socket_timeout(int sig UNUSED_PARAM)
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{
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bb_error_msg_and_die("timeout connecting to time server");
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}
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static time_t askremotedate(const char *host)
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{
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uint32_t nett;
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int fd;
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/* Timeout for dead or inaccessible servers */
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alarm(10);
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signal(SIGALRM, socket_timeout);
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fd = create_and_connect_stream_or_die(host, bb_lookup_port("time", "tcp", 37));
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if (safe_read(fd, &nett, 4) != 4) /* read time from server */
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bb_error_msg_and_die("%s: %s", host, "short read");
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if (ENABLE_FEATURE_CLEAN_UP)
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close(fd);
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/* Convert from network byte order to local byte order.
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* RFC 868 time is seconds since 1900-01-01 00:00 GMT.
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* RFC 868 time 2,208,988,800 corresponds to 1970-01-01 00:00 GMT.
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* Subtract the RFC 868 time to get Linux epoch.
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*/
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nett = ntohl(nett) - RFC_868_BIAS;
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if (sizeof(time_t) > 4) {
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/* Now we have 32-bit lsb of a wider time_t
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* Imagine that nett = 0x00000001,
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* current time cur = 0x123ffffffff.
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* Assuming our time is not some 40 years off,
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* remote time must be 0x12400000001.
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* Need to adjust our time by (int32_t)(nett - cur).
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*/
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time_t cur = time(NULL);
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int32_t adjust = (int32_t)(nett - (uint32_t)cur);
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return cur + adjust;
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}
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/* This is not going to work, but what can we do */
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return (time_t)nett;
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}
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int rdate_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int rdate_main(int argc UNUSED_PARAM, char **argv)
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{
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time_t remote_time;
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unsigned flags;
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flags = getopt32(argv, "^" "sp" "\0" "-1");
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remote_time = askremotedate(argv[optind]);
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/* Manpages of various Unixes are confusing. What happens is:
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* (no opts) set and print time
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* -s: set time ("do not print the time")
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* -p: print time ("do not set, just print the remote time")
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* -sp: print time (that's what we do, not sure this is right)
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*/
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if (!(flags & 2)) { /* no -p (-s may be present) */
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if (time(NULL) == remote_time)
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bb_error_msg("current time matches remote time");
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else
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if (stime(&remote_time) < 0)
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bb_perror_msg_and_die("can't set time of day");
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}
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if (flags != 1) /* not lone -s */
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printf("%s", ctime(&remote_time));
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return EXIT_SUCCESS;
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}
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