Adding upstream version 8.32.upstream/8.32upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 604 insertions, 0 deletions

diff --git a/src/date.c b/src/date.c
new file mode 100644
index 0000000..67bf9bb
--- /dev/null
+++ b/src/date.c
@@ -0,0 +1,604 @@
+/* date - print or set the system date and time
+   Copyright (C) 1989-2020 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+   David MacKenzie <djm@gnu.ai.mit.edu> */
+
+#include <config.h>
+#include <stdio.h>
+#include <getopt.h>
+#include <sys/types.h>
+#if HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+
+#include "system.h"
+#include "argmatch.h"
+#include "die.h"
+#include "error.h"
+#include "parse-datetime.h"
+#include "posixtm.h"
+#include "quote.h"
+#include "stat-time.h"
+#include "fprintftime.h"
+
+/* The official name of this program (e.g., no 'g' prefix).  */
+#define PROGRAM_NAME "date"
+
+#define AUTHORS proper_name ("David MacKenzie")
+
+static bool show_date (const char *, struct timespec, timezone_t);
+
+enum Time_spec
+{
+  /* Display only the date.  */
+  TIME_SPEC_DATE,
+  /* Display date, hours, minutes, and seconds.  */
+  TIME_SPEC_SECONDS,
+  /* Similar, but display nanoseconds. */
+  TIME_SPEC_NS,
+
+  /* Put these last, since they aren't valid for --rfc-3339.  */
+
+  /* Display date and hour.  */
+  TIME_SPEC_HOURS,
+  /* Display date, hours, and minutes.  */
+  TIME_SPEC_MINUTES
+};
+
+static char const *const time_spec_string[] =
+{
+  /* Put "hours" and "minutes" first, since they aren't valid for
+     --rfc-3339.  */
+  "hours", "minutes",
+  "date", "seconds", "ns", NULL
+};
+static enum Time_spec const time_spec[] =
+{
+  TIME_SPEC_HOURS, TIME_SPEC_MINUTES,
+  TIME_SPEC_DATE, TIME_SPEC_SECONDS, TIME_SPEC_NS
+};
+ARGMATCH_VERIFY (time_spec_string, time_spec);
+
+/* A format suitable for Internet RFCs 5322, 2822, and 822.  */
+static char const rfc_email_format[] = "%a, %d %b %Y %H:%M:%S %z";
+
+/* For long options that have no equivalent short option, use a
+   non-character as a pseudo short option, starting with CHAR_MAX + 1.  */
+enum
+{
+  RFC_3339_OPTION = CHAR_MAX + 1,
+  DEBUG_DATE_PARSING
+};
+
+static char const short_options[] = "d:f:I::r:Rs:u";
+
+static struct option const long_options[] =
+{
+  {"date", required_argument, NULL, 'd'},
+  {"debug", no_argument, NULL, DEBUG_DATE_PARSING},
+  {"file", required_argument, NULL, 'f'},
+  {"iso-8601", optional_argument, NULL, 'I'},
+  {"reference", required_argument, NULL, 'r'},
+  {"rfc-email", no_argument, NULL, 'R'},
+  {"rfc-822", no_argument, NULL, 'R'},
+  {"rfc-2822", no_argument, NULL, 'R'},
+  {"rfc-3339", required_argument, NULL, RFC_3339_OPTION},
+  {"set", required_argument, NULL, 's'},
+  {"uct", no_argument, NULL, 'u'},
+  {"utc", no_argument, NULL, 'u'},
+  {"universal", no_argument, NULL, 'u'},
+  {GETOPT_HELP_OPTION_DECL},
+  {GETOPT_VERSION_OPTION_DECL},
+  {NULL, 0, NULL, 0}
+};
+
+/* flags for parse_datetime2 */
+static unsigned int parse_datetime_flags;
+
+#if LOCALTIME_CACHE
+# define TZSET tzset ()
+#else
+# define TZSET /* empty */
+#endif
+
+#ifdef _DATE_FMT
+# define DATE_FMT_LANGINFO() nl_langinfo (_DATE_FMT)
+#else
+# define DATE_FMT_LANGINFO() ""
+#endif
+
+void
+usage (int status)
+{
+  if (status != EXIT_SUCCESS)
+    emit_try_help ();
+  else
+    {
+      printf (_("\
+Usage: %s [OPTION]... [+FORMAT]\n\
+  or:  %s [-u|--utc|--universal] [MMDDhhmm[[CC]YY][.ss]]\n\
+"),
+              program_name, program_name);
+      fputs (_("\
+Display the current time in the given FORMAT, or set the system date.\n\
+"), stdout);
+
+      emit_mandatory_arg_note ();
+
+      fputs (_("\
+  -d, --date=STRING          display time described by STRING, not 'now'\n\
+"), stdout);
+      fputs (_("\
+      --debug                annotate the parsed date,\n\
+                              and warn about questionable usage to stderr\n\
+"), stdout);
+      fputs (_("\
+  -f, --file=DATEFILE        like --date; once for each line of DATEFILE\n\
+"), stdout);
+      fputs (_("\
+  -I[FMT], --iso-8601[=FMT]  output date/time in ISO 8601 format.\n\
+                               FMT='date' for date only (the default),\n\
+                               'hours', 'minutes', 'seconds', or 'ns'\n\
+                               for date and time to the indicated precision.\n\
+                               Example: 2006-08-14T02:34:56-06:00\n\
+"), stdout);
+      fputs (_("\
+  -R, --rfc-email            output date and time in RFC 5322 format.\n\
+                               Example: Mon, 14 Aug 2006 02:34:56 -0600\n\
+"), stdout);
+      fputs (_("\
+      --rfc-3339=FMT         output date/time in RFC 3339 format.\n\
+                               FMT='date', 'seconds', or 'ns'\n\
+                               for date and time to the indicated precision.\n\
+                               Example: 2006-08-14 02:34:56-06:00\n\
+"), stdout);
+      fputs (_("\
+  -r, --reference=FILE       display the last modification time of FILE\n\
+"), stdout);
+      fputs (_("\
+  -s, --set=STRING           set time described by STRING\n\
+  -u, --utc, --universal     print or set Coordinated Universal Time (UTC)\n\
+"), stdout);
+      fputs (HELP_OPTION_DESCRIPTION, stdout);
+      fputs (VERSION_OPTION_DESCRIPTION, stdout);
+      fputs (_("\
+\n\
+FORMAT controls the output.  Interpreted sequences are:\n\
+\n\
+  %%   a literal %\n\
+  %a   locale's abbreviated weekday name (e.g., Sun)\n\
+"), stdout);
+      fputs (_("\
+  %A   locale's full weekday name (e.g., Sunday)\n\
+  %b   locale's abbreviated month name (e.g., Jan)\n\
+  %B   locale's full month name (e.g., January)\n\
+  %c   locale's date and time (e.g., Thu Mar  3 23:05:25 2005)\n\
+"), stdout);
+      fputs (_("\
+  %C   century; like %Y, except omit last two digits (e.g., 20)\n\
+  %d   day of month (e.g., 01)\n\
+  %D   date; same as %m/%d/%y\n\
+  %e   day of month, space padded; same as %_d\n\
+"), stdout);
+      fputs (_("\
+  %F   full date; like %+4Y-%m-%d\n\
+  %g   last two digits of year of ISO week number (see %G)\n\
+  %G   year of ISO week number (see %V); normally useful only with %V\n\
+"), stdout);
+      fputs (_("\
+  %h   same as %b\n\
+  %H   hour (00..23)\n\
+  %I   hour (01..12)\n\
+  %j   day of year (001..366)\n\
+"), stdout);
+      fputs (_("\
+  %k   hour, space padded ( 0..23); same as %_H\n\
+  %l   hour, space padded ( 1..12); same as %_I\n\
+  %m   month (01..12)\n\
+  %M   minute (00..59)\n\
+"), stdout);
+      fputs (_("\
+  %n   a newline\n\
+  %N   nanoseconds (000000000..999999999)\n\
+  %p   locale's equivalent of either AM or PM; blank if not known\n\
+  %P   like %p, but lower case\n\
+  %q   quarter of year (1..4)\n\
+  %r   locale's 12-hour clock time (e.g., 11:11:04 PM)\n\
+  %R   24-hour hour and minute; same as %H:%M\n\
+  %s   seconds since 1970-01-01 00:00:00 UTC\n\
+"), stdout);
+      fputs (_("\
+  %S   second (00..60)\n\
+  %t   a tab\n\
+  %T   time; same as %H:%M:%S\n\
+  %u   day of week (1..7); 1 is Monday\n\
+"), stdout);
+      fputs (_("\
+  %U   week number of year, with Sunday as first day of week (00..53)\n\
+  %V   ISO week number, with Monday as first day of week (01..53)\n\
+  %w   day of week (0..6); 0 is Sunday\n\
+  %W   week number of year, with Monday as first day of week (00..53)\n\
+"), stdout);
+      fputs (_("\
+  %x   locale's date representation (e.g., 12/31/99)\n\
+  %X   locale's time representation (e.g., 23:13:48)\n\
+  %y   last two digits of year (00..99)\n\
+  %Y   year\n\
+"), stdout);
+      fputs (_("\
+  %z   +hhmm numeric time zone (e.g., -0400)\n\
+  %:z  +hh:mm numeric time zone (e.g., -04:00)\n\
+  %::z  +hh:mm:ss numeric time zone (e.g., -04:00:00)\n\
+  %:::z  numeric time zone with : to necessary precision (e.g., -04, +05:30)\n\
+  %Z   alphabetic time zone abbreviation (e.g., EDT)\n\
+\n\
+By default, date pads numeric fields with zeroes.\n\
+"), stdout);
+      fputs (_("\
+The following optional flags may follow '%':\n\
+\n\
+  -  (hyphen) do not pad the field\n\
+  _  (underscore) pad with spaces\n\
+  0  (zero) pad with zeros\n\
+  +  pad with zeros, and put '+' before future years with >4 digits\n\
+  ^  use upper case if possible\n\
+  #  use opposite case if possible\n\
+"), stdout);
+      fputs (_("\
+\n\
+After any flags comes an optional field width, as a decimal number;\n\
+then an optional modifier, which is either\n\
+E to use the locale's alternate representations if available, or\n\
+O to use the locale's alternate numeric symbols if available.\n\
+"), stdout);
+      fputs (_("\
+\n\
+Examples:\n\
+Convert seconds since the epoch (1970-01-01 UTC) to a date\n\
+  $ date --date='@2147483647'\n\
+\n\
+Show the time on the west coast of the US (use tzselect(1) to find TZ)\n\
+  $ TZ='America/Los_Angeles' date\n\
+\n\
+Show the local time for 9AM next Friday on the west coast of the US\n\
+  $ date --date='TZ=\"America/Los_Angeles\" 09:00 next Fri'\n\
+"), stdout);
+      emit_ancillary_info (PROGRAM_NAME);
+    }
+  exit (status);
+}
+
+/* Parse each line in INPUT_FILENAME as with --date and display each
+   resulting time and date.  If the file cannot be opened, tell why
+   then exit.  Issue a diagnostic for any lines that cannot be parsed.
+   Return true if successful.  */
+
+static bool
+batch_convert (const char *input_filename, const char *format,
+               timezone_t tz, char const *tzstring)
+{
+  bool ok;
+  FILE *in_stream;
+  char *line;
+  size_t buflen;
+  struct timespec when;
+
+  if (STREQ (input_filename, "-"))
+    {
+      input_filename = _("standard input");
+      in_stream = stdin;
+    }
+  else
+    {
+      in_stream = fopen (input_filename, "r");
+      if (in_stream == NULL)
+        {
+          die (EXIT_FAILURE, errno, "%s", quotef (input_filename));
+        }
+    }
+
+  line = NULL;
+  buflen = 0;
+  ok = true;
+  while (1)
+    {
+      ssize_t line_length = getline (&line, &buflen, in_stream);
+      if (line_length < 0)
+        {
+          /* FIXME: detect/handle error here.  */
+          break;
+        }
+
+      if (! parse_datetime2 (&when, line, NULL,
+                             parse_datetime_flags, tz, tzstring))
+        {
+          if (line[line_length - 1] == '\n')
+            line[line_length - 1] = '\0';
+          error (0, 0, _("invalid date %s"), quote (line));
+          ok = false;
+        }
+      else
+        {
+          ok &= show_date (format, when, tz);
+        }
+    }
+
+  if (fclose (in_stream) == EOF)
+    die (EXIT_FAILURE, errno, "%s", quotef (input_filename));
+
+  free (line);
+
+  return ok;
+}
+
+int
+main (int argc, char **argv)
+{
+  int optc;
+  const char *datestr = NULL;
+  const char *set_datestr = NULL;
+  struct timespec when;
+  bool set_date = false;
+  char const *format = NULL;
+  char *batch_file = NULL;
+  char *reference = NULL;
+  struct stat refstats;
+  bool ok;
+  int option_specified_date;
+
+  initialize_main (&argc, &argv);
+  set_program_name (argv[0]);
+  setlocale (LC_ALL, "");
+  bindtextdomain (PACKAGE, LOCALEDIR);
+  textdomain (PACKAGE);
+
+  atexit (close_stdout);
+
+  while ((optc = getopt_long (argc, argv, short_options, long_options, NULL))
+         != -1)
+    {
+      char const *new_format = NULL;
+
+      switch (optc)
+        {
+        case 'd':
+          datestr = optarg;
+          break;
+        case DEBUG_DATE_PARSING:
+          parse_datetime_flags |= PARSE_DATETIME_DEBUG;
+          break;
+        case 'f':
+          batch_file = optarg;
+          break;
+        case RFC_3339_OPTION:
+          {
+            static char const rfc_3339_format[][32] =
+              {
+                "%Y-%m-%d",
+                "%Y-%m-%d %H:%M:%S%:z",
+                "%Y-%m-%d %H:%M:%S.%N%:z"
+              };
+            enum Time_spec i =
+              XARGMATCH ("--rfc-3339", optarg,
+                         time_spec_string + 2, time_spec + 2);
+            new_format = rfc_3339_format[i];
+            break;
+          }
+        case 'I':
+          {
+            static char const iso_8601_format[][32] =
+              {
+                "%Y-%m-%d",
+                "%Y-%m-%dT%H:%M:%S%:z",
+                "%Y-%m-%dT%H:%M:%S,%N%:z",
+                "%Y-%m-%dT%H%:z",
+                "%Y-%m-%dT%H:%M%:z"
+              };
+            enum Time_spec i =
+              (optarg
+               ? XARGMATCH ("--iso-8601", optarg, time_spec_string, time_spec)
+               : TIME_SPEC_DATE);
+            new_format = iso_8601_format[i];
+            break;
+          }
+        case 'r':
+          reference = optarg;
+          break;
+        case 'R':
+          new_format = rfc_email_format;
+          break;
+        case 's':
+          set_datestr = optarg;
+          set_date = true;
+          break;
+        case 'u':
+          /* POSIX says that 'date -u' is equivalent to setting the TZ
+             environment variable, so this option should do nothing other
+             than setting TZ.  */
+          if (putenv (bad_cast ("TZ=UTC0")) != 0)
+            xalloc_die ();
+          TZSET;
+          break;
+        case_GETOPT_HELP_CHAR;
+        case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
+        default:
+          usage (EXIT_FAILURE);
+        }
+
+      if (new_format)
+        {
+          if (format)
+            die (EXIT_FAILURE, 0, _("multiple output formats specified"));
+          format = new_format;
+        }
+    }
+
+  option_specified_date = ((datestr ? 1 : 0)
+                           + (batch_file ? 1 : 0)
+                           + (reference ? 1 : 0));
+
+  if (option_specified_date > 1)
+    {
+      error (0, 0,
+        _("the options to specify dates for printing are mutually exclusive"));
+      usage (EXIT_FAILURE);
+    }
+
+  if (set_date && option_specified_date)
+    {
+      error (0, 0,
+          _("the options to print and set the time may not be used together"));
+      usage (EXIT_FAILURE);
+    }
+
+  if (optind < argc)
+    {
+      if (optind + 1 < argc)
+        {
+          error (0, 0, _("extra operand %s"), quote (argv[optind + 1]));
+          usage (EXIT_FAILURE);
+        }
+
+      if (argv[optind][0] == '+')
+        {
+          if (format)
+            die (EXIT_FAILURE, 0, _("multiple output formats specified"));
+          format = argv[optind++] + 1;
+        }
+      else if (set_date || option_specified_date)
+        {
+          error (0, 0,
+                 _("the argument %s lacks a leading '+';\n"
+                   "when using an option to specify date(s), any non-option\n"
+                   "argument must be a format string beginning with '+'"),
+                 quote (argv[optind]));
+          usage (EXIT_FAILURE);
+        }
+    }
+
+  if (!format)
+    {
+      format = DATE_FMT_LANGINFO ();
+      if (! *format)
+        {
+          /* Do not wrap the following literal format string with _(...).
+             For example, suppose LC_ALL is unset, LC_TIME=POSIX,
+             and LANG="ko_KR".  In that case, POSIX says that LC_TIME
+             determines the format and contents of date and time strings
+             written by date, which means "date" must generate output
+             using the POSIX locale; but adding _() would cause "date"
+             to use a Korean translation of the format.  */
+          format = "%a %b %e %H:%M:%S %Z %Y";
+        }
+    }
+
+  char const *tzstring = getenv ("TZ");
+  timezone_t tz = tzalloc (tzstring);
+
+  if (batch_file != NULL)
+    ok = batch_convert (batch_file, format, tz, tzstring);
+  else
+    {
+      bool valid_date = true;
+      ok = true;
+
+      if (!option_specified_date && !set_date)
+        {
+          if (optind < argc)
+            {
+              /* Prepare to set system clock to the specified date/time
+                 given in the POSIX-format.  */
+              set_date = true;
+              datestr = argv[optind];
+              valid_date = posixtime (&when.tv_sec,
+                                      datestr,
+                                      (PDS_TRAILING_YEAR
+                                       | PDS_CENTURY | PDS_SECONDS));
+              when.tv_nsec = 0; /* FIXME: posixtime should set this.  */
+            }
+          else
+            {
+              /* Prepare to print the current date/time.  */
+              gettime (&when);
+            }
+        }
+      else
+        {
+          /* (option_specified_date || set_date) */
+          if (reference != NULL)
+            {
+              if (stat (reference, &refstats) != 0)
+                die (EXIT_FAILURE, errno, "%s", quotef (reference));
+              when = get_stat_mtime (&refstats);
+            }
+          else
+            {
+              if (set_datestr)
+                datestr = set_datestr;
+              valid_date = parse_datetime2 (&when, datestr, NULL,
+                                            parse_datetime_flags,
+                                            tz, tzstring);
+            }
+        }
+
+      if (! valid_date)
+        die (EXIT_FAILURE, 0, _("invalid date %s"), quote (datestr));
+
+      if (set_date)
+        {
+          /* Set the system clock to the specified date, then regardless of
+             the success of that operation, format and print that date.  */
+          if (settime (&when) != 0)
+            {
+              error (0, errno, _("cannot set date"));
+              ok = false;
+            }
+        }
+
+      ok &= show_date (format, when, tz);
+    }
+
+  IF_LINT (tzfree (tz));
+
+  return ok ? EXIT_SUCCESS : EXIT_FAILURE;
+}
+
+/* Display the date and/or time in WHEN according to the format specified
+   in FORMAT, followed by a newline.  Return true if successful.  */
+
+static bool
+show_date (const char *format, struct timespec when, timezone_t tz)
+{
+  struct tm tm;
+
+  if (localtime_rz (tz, &when.tv_sec, &tm))
+    {
+      if (format == rfc_email_format)
+        setlocale (LC_TIME, "C");
+      fprintftime (stdout, format, &tm, tz, when.tv_nsec);
+      if (format == rfc_email_format)
+        setlocale (LC_TIME, "");
+      fputc ('\n', stdout);
+      return true;
+    }
+  else
+    {
+      char buf[INT_BUFSIZE_BOUND (intmax_t)];
+      error (0, 0, _("time %s is out of range"),
+             quote (timetostr (when.tv_sec, buf)));
+      return false;
+    }
+}