Revert lots of half-finished local debris I didn't mean to check in with Isaac's roadmap update.

Mercurial's "import" command is still broken, committing local tree changes to files that weren't even touched by the patch because the hg developers inisist, when I point out how stupid it is, that they meant to do that. (hg record can do hunks, but import can't even track _files_.)

1 files changed, 56 insertions, 104 deletions

diff --git a/toys/posix/date.c b/toys/posix/date.c
index a4e5e27c..e1ba636d 100644
--- a/toys/posix/date.c
+++ b/toys/posix/date.c
@@ -7,39 +7,21 @@
  * Note: setting a 2 year date is 50 years back/forward from today,
  * not posix's hardwired magic dates.
 
-USE_DATE(NEWTOY(date, "d:s:r:u", TOYFLAG_BIN))
+USE_DATE(NEWTOY(date, "r:u", TOYFLAG_BIN))
 
 config DATE
   bool "date"
   default y
   help
-    usage: date [-u] [-r FILE] [-d DATE] [+DISPLAY_FORMAT] [-s SET_FORMAT] [SET]
+    usage: date [-u] [-r FILE] [+FORMAT] | mmddhhmm[[cc]yy[.ss]]
 
-    Set/get the current date/time. With no SET shows the current date.
+    Set/get the current date/time.
 
-    Default SET format is "MMDDhhmm[[CC]YY][.ss]", that's (2 digits each)
-    month, day, hour (0-23), and minute. Optionally century, year, and second.
+    Setting the date requires month, day, hour (0-23), and minute, each
+    two digits. It can optionally include year, century, and .seconds.
 
-    -d	Show DATE instead of current time (convert date format)
-    -r	Use modification time of FILE instead of current date
-    -s	+FORMAT for SET or -d (instead of MMDDhhmm[[CC]YY][.ss])
-    -u	Use UTC instead of current timezone
-
-    +FORMAT specifies display format string using these escapes:
-
-    %% literal %             %n newline              %t tab
-    %S seconds (00-60)       %M minute (00-59)       %m month (01-12)
-    %H hour (0-23)           %I hour (01-12)         %p AM/PM
-    %y short year (00-99)    %Y year                 %C century
-    %a short weekday name    %A weekday name         %u day of week (1-7, 1=mon)
-    %b short month name      %B month name           %Z timezone name
-    %j day of year (001-366) %d day of month (01-31) %e day of month ( 1-31)
-
-    %U Week of year (0-53 start sunday)   %W Week of year (0-53 start monday)
-    %V Week of year (1-53 start monday, week < 4 days not part of this year) 
-
-    %D = "%m/%d/%y"    %r = "%I : %M : %S %p"   %T = "%H:%M:%S"   %h = "%b"
-    %x locale date     %X locale time           %c locale date/time
+    -u	Use UTC timezone instead of current
+    -r	Use date from FILE instead of current date
 */
 
 #define FOR_date
@@ -47,95 +29,72 @@ config DATE
 
 GLOBALS(
   char *file;
-  char *setfmt;
-  char *showdate;
 )
 
-// Handle default posix date format: mmddhhmm[[cc]yy]
-// returns 0 success, nonzero for error
-int parse_posixdate(char *str, struct tm *tm)
-{
-  struct timeval tv;
-  int len;
-
-  len = 0;
-  sscanf(str, "%2u%2u%2u%2u%n", &tm.tm_mon, &tm.tm_mday, &tm.tm_hour,
-    &tm.tm_min, &len);
-  if (len != 8) goto bad_date;
-  str += len;
-  tm.tm_mon--;
-
-  // If year specified, overwrite one we fetched earlier
-  if (*str && *str != '.') {
-    unsigned year, r1 = tm.tm_year % 100, r2 = (tm.tm_year + 50) % 100,
-      century = tm.tm_year - r1;
-
-    len = 0;
-    sscanf(str, "%u%n", &year, &len);
-    if (len == 4) year -= 1900;
-    else if (len != 2) goto bad_date;
-    str += len;
-
-    // 2 digit years, next 50 years are "future", last 50 years are "past".
-    // A "future" date in past is a century ahead.
-    // A non-future date in the future is a century behind.
-    if ((r1 < r2) ? (r1 < year && year < r2) : (year < r1 || year > r2)) {
-      if (year < r1) year += 100;
-    } else if (year > r1) year -= 100;
-    tm.tm_year = year + century;
-  }
-  if (*str == '.') {
-    len = 0;
-    sscanf(str, ".%u%n", &tm.tm_sec, &len);
-    str += len;
-  }
-
-  return *str;
-}
-
-
 void date_main(void)
 {
-  char *setdate = *toys.optargs, *format_string = "%a %b %e %H:%M:%S %Z %Y",
-       *tz;
+  const char *format_string = "%a %b %e %H:%M:%S %Z %Y";
   time_t now = time(NULL);
   struct tm tm;
 
-  // We can't just pass a timezone to mktime because posix.
-  if (toys.optflags & FLAG_u) {
-    tz = CFG_TOYBOX_FREE ? getenv("TZ") : 0;
-    setenv("TZ", "UTC", 1);
-    tzset();
-  }
-
   if (TT.file) {
     struct stat st;
 
     xstat(TT.file, &st);
     now = st.st_mtim.tv_sec;
-  } else if (TT.showdate) {
-    if (TT.setfmt) {
-      char *s = strptime(TT.showdate, TT.setfmt, &tm);
-
-      if (!s || !*s) goto bad_date;
-    } else if (parse_posixdate(TT.showdate, &tm)) goto bad_date;
-  } else localtime_r(&now, &tm);
+  }
+  ((toys.optflags & FLAG_u) ? gmtime_r : localtime_r)(&now, &tm);
 
-  // Fall through if no arguments
-  if (!setdate);
   // Display the date?
-  else if (*setdate == '+') {
-    format_string = toys.optargs[0]+1;
-    setdate = toys.optargs[1];
+  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)) goto bad_format;
+
+    puts(toybuf);
 
   // Set the date
-  } else if (setdate) {
-    if (parse_posixdate(setdate, tm)) goto bad_date;
+  } else {
+    struct timeval tv;
+    char *s = *toys.optargs;
+    int len;
+
+    // Date format: mmddhhmm[[cc]yy]
+    len = 0;
+    sscanf(s, "%2u%2u%2u%2u%n", &tm.tm_mon, &tm.tm_mday, &tm.tm_hour,
+      &tm.tm_min, &len);
+    if (len != 8) goto bad_date;
+    s += len;
+    tm.tm_mon--;
+
+    // If year specified, overwrite one we fetched earlier
+    if (*s && *s != '.') {
+      unsigned year, r1 = tm.tm_year % 100, r2 = (tm.tm_year + 50) % 100,
+        century = tm.tm_year - r1;
+
+      len = 0;
+      sscanf(s, "%u%n", &year, &len);
+      if (len == 4) year -= 1900;
+      else if (len != 2) goto bad_date;
+      s += len;
+
+      // 2 digit years, next 50 years are "future", last 50 years are "past".
+      // A "future" date in past is a century ahead.
+      // A non-future date in the future is a century behind.
+      if ((r1 < r2) ? (r1 < year && year < r2) : (year < r1 || year > r2)) {
+        if (year < r1) year += 100;
+      } else if (year > r1) year -= 100;
+      tm.tm_year = year + century;
+    }
+    if (*s == '.') {
+      len = 0;
+      sscanf(s, ".%u%n", &tm.tm_sec, &len);
+      s += len;
+    }
+    if (*s) goto bad_date;
 
     if (toys.optflags & FLAG_u) {
-      // We can't just pass a timezone to mktime because posix.
+      // 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);
@@ -148,18 +107,11 @@ void date_main(void)
     if (tv.tv_sec == (time_t)-1) goto bad_date;
 
     tv.tv_usec = 0;
+    if (!strftime(toybuf, sizeof(toybuf), format_string, &tm)) goto bad_format;
+    puts(toybuf);
     if (settimeofday(&tv, NULL) < 0) perror_msg("cannot set date");
   }
 
-  if (toys.optflags & FLAG_u) {
-    if (tz) setenv("TZ", tz, 1);
-    else unsetenv("TZ");
-    tzset();
-  }
-
-  if (!strftime(toybuf, sizeof(toybuf), format_string, &tm)) goto bad_format;
-  puts(toybuf);
-
   return;
 
 bad_date: