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-rw-r--r--toys/posix/date.c95
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diff --git a/toys/posix/date.c b/toys/posix/date.c
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+/* vi: set sw=4 ts=4:
+ *
+ * date.c - set/get the date
+ *
+ * Copyright 2012 Andre Renaud <andre@bluewatersys.com>
+ *
+ * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/date.html
+
+USE_DATE(NEWTOY(date, "r:u", TOYFLAG_BIN))
+
+config DATE
+ bool "date"
+ default y
+ help
+ usage: date [-u] [-r file] [+format] | mmddhhmm[[cc]yy]
+
+ Set/get the current date/time
+*/
+
+#include "toys.h"
+
+DEFINE_GLOBALS(
+ char *file;
+)
+
+#define TT this.date
+
+#define FLAG_u 1
+#define FLAG_r 2
+
+void date_main(void)
+{
+ const char *format_string = "%a %b %e %H:%M:%S %Z %Y";
+ time_t now = time(NULL);
+ struct tm tm;
+
+ if (TT.file) {
+ struct stat st;
+
+ xstat(TT.file, &st);
+ now = st.st_mtim.tv_sec;
+ }
+ ((toys.optflags & FLAG_u) ? gmtime_r : localtime_r)(&now, &tm);
+
+ // Display the date?
+ if (!toys.optargs[0] || toys.optargs[0][0] == '+') {
+ if (toys.optargs[0]) format_string = toys.optargs[0]+1;
+ if (!strftime(toybuf, sizeof(toybuf), format_string, &tm))
+ perror_msg("bad format `%s'", format_string);
+
+ puts(toybuf);
+
+ // Set the date
+ } else {
+ struct timeval tv;
+ char *s = *toys.optargs;
+ int len = strlen(s);
+
+ if (len < 8 || len > 12 || (len & 1)) error_msg("bad date `%s'", s);
+
+ // Date format: mmddhhmm[[cc]yy]
+ memset(&tm, 0, sizeof(tm));
+ len = sscanf(s, "%2u%2u%2u%2u", &tm.tm_mon, &tm.tm_mday, &tm.tm_hour,
+ &tm.tm_min);
+ tm.tm_mon--;
+
+ // If year specified, overwrite one we fetched earlier
+ if (len > 8) {
+ sscanf(s, "%u", &tm.tm_year);
+ if (len == 12) tm.tm_year -= 1900;
+ /* 69-99 = 1969-1999, 0 - 68 = 2000-2068 */
+ else if (tm.tm_year < 69) tm.tm_year += 100;
+ }
+
+ if (toys.optflags & FLAG_u) {
+ // Get the UTC version of a struct tm
+ char *tz = CFG_TOYBOX_FREE ? getenv("TZ") : 0;
+ setenv("TZ", "UTC", 1);
+ tzset();
+ tv.tv_sec = mktime(&tm);
+ if (CFG_TOYBOX_FREE) {
+ if (tz) setenv("TZ", tz, 1);
+ else unsetenv("TZ");
+ tzset();
+ }
+ } else tv.tv_sec = mktime(&tm);
+
+ if (tv.tv_sec == (time_t)-1) error_msg("bad `%s'", toys.optargs[0]);
+ tv.tv_usec = 0;
+ if (!strftime(toybuf, sizeof(toybuf), format_string, &tm))
+ perror_msg("bad format `%s'", format_string);
+ puts(toybuf);
+ if (settimeofday(&tv, NULL) < 0) perror_msg("cannot set date");
+ }
+}