-#include "internal.h"
-#include <stdlib.h>
-#include <errno.h>
-#include <sys/time.h>
-#include <unistd.h>
-#include <time.h>
-#include <stdio.h>
-#include <getopt.h>
-
-
-/* This 'date' command supports only 2 time setting formats,
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini date implementation for busybox
+ *
+ * by Matthew Grant <grantma@anathoth.gen.nz>
+ *
+ * iso-format handling added by Robert Griebl <griebl@gmx.de>
+ * bugfixes and cleanup by Bernhard Reutner-Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+*/
+
+/* This 'date' command supports only 2 time setting formats,
all the GNU strftime stuff (its in libc, lets use it),
- setting time using UTC and displaying int, as well as
- an RFC 822 complient date output for shell scripting
+ setting time using UTC and displaying it, as well as
+ an RFC 2822 compliant date output for shell scripting
mail commands */
-const char date_usage[] = "date [-uR] [+FORMAT|+%f] [ [-s|-d] MMDDhhmm[[CC]YY]\n | [[[[CCYY.]MM.DD-]hh:mm[:ss]]]] ]";
-
-static struct option const long_options[] =
-{
- {"date", required_argument, NULL, 'd'},
- /* {"rfc-822", no_argument, NULL, 'R'},
- {"set", required_argument, NULL, 's'},
- {"uct", no_argument, NULL, 'u'},
- {"utc", no_argument, NULL, 'u'},
- {"universal", no_argument, NULL, 'u'}, */
- {NULL, 0, NULL, 0}
-};
-
-
-
/* Input parsing code is always bulky - used heavy duty libc stuff as
much as possible, missed out a lot of bounds checking */
-/* Default input handling to save suprising some people */
-
-struct tm *
-date_conv_time(struct tm *tm_time, const char *t_string) {
- int nr;
-
- nr = sscanf(t_string, "%2d%2d%2d%2d%d",
- &(tm_time->tm_mon),
- &(tm_time->tm_mday),
- &(tm_time->tm_hour),
- &(tm_time->tm_min),
- &(tm_time->tm_year));
-
- if(nr < 4 || nr > 5) {
- fprintf(stderr, "date: invalid date `%s'\n", t_string);
- exit(1);
- }
-
- /* correct for century - minor Y2K problem here? */
- if(tm_time->tm_year >= 1900)
- tm_time->tm_year -= 1900;
- /* adjust date */
- tm_time->tm_mon -= 1;
-
- return(tm_time);
-
-}
-
-
-/* The new stuff for LRP */
-
-struct tm *
-date_conv_ftime(struct tm *tm_time, const char *t_string) {
- struct tm itm_time, jtm_time, ktm_time, \
- ltm_time, mtm_time, ntm_time;
-
- itm_time = *tm_time;
- jtm_time = *tm_time;
- ktm_time = *tm_time;
- ltm_time = *tm_time;
- mtm_time = *tm_time;
- ntm_time = *tm_time;
-
- /* Parse input and assign appropriately to tm_time */
-
- if(sscanf(t_string, "%d:%d:%d",
- &itm_time.tm_hour,
- &itm_time.tm_min,
- &itm_time.tm_sec) == 3 ) {
-
- *tm_time = itm_time;
- return(tm_time);
-
- } else if (sscanf(t_string, "%d:%d",
- &jtm_time.tm_hour,
- &jtm_time.tm_min) == 2) {
-
- *tm_time = jtm_time;
- return(tm_time);
-
- } else if (sscanf(t_string, "%d.%d-%d:%d:%d",
- &ktm_time.tm_mon,
- &ktm_time.tm_mday,
- &ktm_time.tm_hour,
- &ktm_time.tm_min,
- &ktm_time.tm_sec) == 5) {
-
- ktm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
- *tm_time = ktm_time;
- return(tm_time);
-
- } else if (sscanf(t_string, "%d.%d-%d:%d",
- <m_time.tm_mon,
- <m_time.tm_mday,
- <m_time.tm_hour,
- <m_time.tm_min) == 4) {
-
- ltm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
- *tm_time = ltm_time;
- return(tm_time);
-
- } else if (sscanf(t_string, "%d.%d.%d-%d:%d:%d",
- &mtm_time.tm_year,
- &mtm_time.tm_mon,
- &mtm_time.tm_mday,
- &mtm_time.tm_hour,
- &mtm_time.tm_min,
- &mtm_time.tm_sec) == 6) {
-
- mtm_time.tm_year -= 1900; /* Adjust years */
- mtm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
- *tm_time = mtm_time;
- return(tm_time);
-
- } else if (sscanf(t_string, "%d.%d.%d-%d:%d",
- &ntm_time.tm_year,
- &ntm_time.tm_mon,
- &ntm_time.tm_mday,
- &ntm_time.tm_hour,
- &ntm_time.tm_min) == 5) {
- ntm_time.tm_year -= 1900; /* Adjust years */
- ntm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */
- *tm_time = ntm_time;
- return(tm_time);
-
- }
-
- fprintf(stderr, "date: invalid date `%s'\n", t_string);
-
- exit(1);
-
-}
-
+/* Default input handling to save surprising some people */
+
+/* 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
+ */
+#include "libbb.h"
+
+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 */
+};
-void
-date_err(void) {
- fprintf(stderr, "date: only one date argument can be given at a time.\n");
- exit(1);
+static void maybe_set_utc(int opt)
+{
+ if (opt & OPT_UTC)
+ putenv((char*)"TZ=UTC0");
}
-int
-date_main(struct FileInfo * i, int argc, char * * argv)
+int date_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int date_main(int argc UNUSED_PARAM, char **argv)
{
- char *date_str = NULL;
- char *date_fmt = NULL;
- char *t_buff;
- int set_time = 0;
- int rfc822 = 0;
- int utc = 0;
- int use_arg = 0;
- int n_args;
- time_t tm;
- struct tm tm_time;
- char optc;
-
- /* Interpret command line args */
-
-
- while ((optc = getopt_long (argc, argv, "d:Rs:u", long_options, NULL))
- != EOF) {
- switch (optc) {
- case 0:
- break;
-
- case 'R':
- rfc822 = 1;
- break;
-
- case 's':
- set_time = 1;
- if(date_str != NULL) date_err();
- date_str = optarg;
- break;
-
- case 'u':
- utc = 1;
- if (putenv ("TZ=UTC0") != 0) {
- fprintf(stderr,"date: memory exhausted\n");
- return(1);
- }
-#if LOCALTIME_CACHE
- tzset ();
-#endif break;
-
- case 'd':
- use_arg = 1;
- if(date_str != NULL) date_err();
- date_str = optarg;
- break;
-
- default:
- usage(date_usage);
- break;
- }
- }
-
-
- n_args = argc - optind;
-
- while (n_args--){
- switch(argv[optind][0]) {
- case '+':
- /* Date format strings */
- if(date_fmt != NULL) {
- fprintf(stderr, "date: only one date format can be given.\n");
- return(1);
- }
- date_fmt = &argv[optind][1];
- break;
-
- case '\0':
- break;
-
- default:
- /* Anything left over must be a date string to set the time */
- set_time = 1;
- if(date_str != NULL) date_err();
- date_str = argv[optind];
- break;
- }
- optind++;
- }
-
-
- /* Now we have parsed all the information except the date format
- which depends on whether the clock is being set or read */
-
- time(&tm);
- memcpy(&tm_time, localtime(&tm), sizeof(tm_time));
- /* Zero out fields - take her back to midnight!*/
- if(date_str != NULL) {
- 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(date_str != NULL) {
-
- if(strchr(date_str, ':') != NULL) {
- date_conv_ftime(&tm_time, date_str);
- } else {
- date_conv_time(&tm_time, date_str);
- }
-
- /* Correct any day of week and day of year etc fields */
- tm = mktime(&tm_time);
- if (tm < 0 ) {
- fprintf(stderr, "date: invalid date `%s'\n", date_str);
- exit(1);
- }
-
- /* if setting time, set it */
- if(set_time) {
- if( stime(&tm) < 0) {
- fprintf(stderr, "date: can't set date.\n");
- exit(1);
- }
- }
- }
-
- /* Display output */
-
- /* Deal with format string */
- if(date_fmt == NULL) {
- date_fmt = (rfc822
- ? (utc
- ? "%a, %_d %b %Y %H:%M:%S GMT"
- : "%a, %_d %b %Y %H:%M:%S %z")
- : "%a %b %e %H:%M:%S %Z %Y");
-
- } else if ( *date_fmt == '\0' ) {
- /* Imitate what GNU 'date' does with NO format string! */
- printf ("\n");
- return(0);
- }
-
- /* Handle special conversions */
-
- if( strncmp( date_fmt, "%f", 2) == 0 ) {
- date_fmt = "%Y.%m.%d-%H:%M:%S";
- }
-
- /* Print OUTPUT (after ALL that!) */
- t_buff = malloc(201);
- strftime(t_buff, 200, date_fmt, &tm_time);
- printf("%s\n", t_buff);
-
- return(0);
-
+ struct tm tm_time;
+ time_t tm;
+ unsigned opt;
+ int ifmt = -1;
+ char *date_str;
+ char *fmt_dt2str;
+ char *fmt_str2dt;
+ char *filename;
+ char *isofmt_arg = NULL;
+
+ opt_complementary = "d--s:s--d"
+ IF_FEATURE_DATE_ISOFMT(":R--I:I--R");
+ opt = getopt32(argv, "Rs:ud:r:"
+ IF_FEATURE_DATE_ISOFMT("I::D:"),
+ &date_str, &date_str, &filename
+ 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";
+ ifmt = index_in_strings(isoformats, isofmt_arg);
+ if (ifmt < 0)
+ bb_show_usage();
+ }
+ }
+
+ 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)
+ 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);
+ tm = statbuf.st_mtime;
+ } else {
+ time(&tm);
+ }
+ localtime_r(&tm, &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 */
+ tm_time.tm_isdst = -1; /* Be sure to recheck dst */
+ tm = validate_tm_time(date_str, &tm_time);
+
+ maybe_set_utc(opt);
+
+ /* if setting time, set it */
+ if ((opt & OPT_SET) && stime(&tm) < 0) {
+ bb_perror_msg("cannot set date");
+ }
+ }
+
+ /* Display output */
+
+ /* Deal with format string */
+ if (fmt_dt2str == NULL) {
+ int i;
+ fmt_dt2str = xzalloc(32);
+ if (ENABLE_FEATURE_DATE_ISOFMT && ifmt >= 0) {
+ strcpy(fmt_dt2str, "%Y-%m-%d");
+ if (ifmt > 0) {
+ i = 8;
+ fmt_dt2str[i++] = 'T';
+ fmt_dt2str[i++] = '%';
+ fmt_dt2str[i++] = 'H';
+ if (ifmt > 1) {
+ fmt_dt2str[i++] = ':';
+ fmt_dt2str[i++] = '%';
+ fmt_dt2str[i++] = 'M';
+ if (ifmt > 2) {
+ fmt_dt2str[i++] = ':';
+ fmt_dt2str[i++] = '%';
+ fmt_dt2str[i++] = 'S';
+ }
+ }
+ format_utc:
+ fmt_dt2str[i++] = '%';
+ fmt_dt2str[i] = (opt & OPT_UTC) ? 'Z' : 'z';
+ }
+ } else if (opt & OPT_RFC2822) {
+ /* Undo busybox.c for date -R */
+ if (ENABLE_LOCALE_SUPPORT)
+ setlocale(LC_TIME, "C");
+ strcpy(fmt_dt2str, "%a, %d %b %Y %H:%M:%S ");
+ i = 22;
+ goto format_utc;
+ } else /* default case */
+ fmt_dt2str = (char*)"%a %b %e %H:%M:%S %Z %Y";
+ }
+
+#define date_buf bb_common_bufsiz1
+ if (*fmt_dt2str == '\0') {
+ /* With no format string, just print a blank line */
+ date_buf[0] = '\0';
+ } else {
+ /* Handle special conversions */
+ if (strncmp(fmt_dt2str, "%f", 2) == 0) {
+ fmt_dt2str = (char*)"%Y.%m.%d-%H:%M:%S";
+ }
+
+ /* Generate output string */
+ strftime(date_buf, sizeof(date_buf), fmt_dt2str, &tm_time);
+ }
+ puts(date_buf);
+
+ return EXIT_SUCCESS;
}
projects / oweals / busybox.git / blobdiff