1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
|
/* strptime - take a date-time string and turn it into seconds since the epoch. */
/* See Makefile for compilation details. */
/*
Copyright (C) 2023-2025 Free Software Foundation, Inc.
This file is part of GNU Bash.
Bash 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.
Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#include "bashtypes.h"
#include "posixtime.h"
#include <stdio.h>
#include "builtins.h"
#include "shell.h"
#include "bashgetopt.h"
#include "common.h"
struct date_modifier
{
char *shorthand;
int incr;
};
static struct date_modifier date_time_modifiers[] =
{
{ "now", 0 },
{ "today", 0 },
{ "tomorrow", 24*60*60 },
{ "yesterday", -24*60*60 },
{ "day after tomorrow", 48*60*60 },
{ "two days ago", -48*60*60 },
{ "next week", 7*24*60*60 },
{ "last week", -7*24*60*60 },
{ "the day after tomorrow", 48*60*60 },
{ 0, 0 }
};
static char * const date_time_formats[] =
{
"%a %b %d %T %Z %Y", /* Unix date */
"%a %b %d %T %Y", /* Wkd Mon DD HH:MM:SS YYYY */
"%FT%T%z", /* ISO8601 time YYYY-mm-ddTHH:MM:SSzone */
"%FT%R%z", /* ISO8601 time YYYY-mm-ddTHH:MMzone */
"%G-%m-%dT%T%z", /* ISO8601 time YYYY-mm-ddTHH:MM:SSzone */
"%G-%m-%dT%R%z", /* ISO8601 time YYYY-mm-ddTHH:MMzone */
"%G-%m-%d", /* ISO8601 time YYYY-mm-dd */
/* Can't do 8601 time zone offset with colon or fractions of a second */
"%a, %d %b %Y %T %Z", /* RFC822/RFC2822 time */
"%a, %d %b %Y %T %z", /* RFC822/RFC2822 time */
"%D %T", /* mm/dd/yy HH:MM:SS */
"%D %R", /* mm/dd/yy HH:MM */
"%D %r", /* mm/dd/yy HH:MM:SS a.m. */
"%D %I:%M %p", /* mm/dd/yy HH:MM p.m. */
"%m/%d/%Y %T", /* mm/dd/YYYY HH:MM:SS */
"%m/%d/%Y %R", /* mm/dd/YYYY HH:MM */
"%m/%d/%Y %r", /* mm/dd/YYYY HH:MM:SS a.m */
"%m/%d/%Y %I:%M %p", /* mm/dd/YYYY HH:MM p.m. */
"%m-%d-%Y %T", /* mm-dd-YYYY HH:MM:SS */
"%m-%d-%Y %R", /* mm-dd-YYYY HH:MM */
"%m-%d-%Y %r", /* mm-dd-YYYY HH:MM:SS a.m. */
"%m-%d-%Y %I:%M %p", /* mm-dd-YYYY HH:MM p.m. */
"%Y/%m/%d %T", /* YYYY/mm/dd HH:MM:SS */
"%Y/%m/%d %R", /* YYYY/mm/dd HH:MM */
"%Y/%m/%d %r", /* YYYY/mm/dd hh:MM:SS a.m. */
"%F %T", /* YYYY-mm-dd HH:MM:SS */
"%F %r", /* YYYY-mm-dd HH:MM:SS p.m. */
"%F %R", /* YYYY-mm-dd HH:MM */
"%F %I:%M %p", /* YYYY-mm-dd HH:MM a.m. */
/* From coreutils-9.2 date */
"%Y-%m-%dT%H:%M:%S%z", /* ISO8601 time */
"%Y-%m-%dT%H%z", /* ISO8601 time */
"%Y-%m-%dT%H:%M%z", /* ISO8601 time */
"%Y-%m-%dT%H:%M:%S%Z", /* ISO8601 time but with timezone name */
"%Y-%m-%dT%H%Z", /* ISO8601 time but with timezone name */
"%Y-%m-%dT%H:%M%Z", /* ISO8601 time but with timezone name */
/* RFC 3339 time */
"%Y-%m-%d %H:%M:%S%z", /* RFC 3339 time */
"%Y-%m-%d %H:%M:%S%Z", /* RFC 3339 time but with timezone name */
#if 0
"%Y-%m-%dT%H:%M:%S%z", /* RFC 3339 time, same as first ISO8601 time */
#endif
/* more oddball formats */
"%m.%d.%Y %T", /* mm.dd.YYYY HH:MM:SS */
"%m.%d.%Y %R", /* mm.dd.YYYY HH:MM */
"%m.%d.%Y %r", /* mm.dd.YYYY HH:MM:SS a.m. */
"%m.%d.%Y %I:%M %p", /* mm.dd.YYYY HH:MM p.m. */
"%m/%d/%Y", /* mm/dd/YYYY */
"%d %B %Y %T", /* dd Month YYYY HH:MM:SS */
"%d %B %Y %R", /* dd Month YYYY HH:MM */
"%d %B %Y %r", /* dd Month YYYY HH:MM:SS a.m. */
"%d %B %Y %I:%M %p", /* dd Month YYYY HH:MM p.m. */
"%d %b %Y %T", /* dd Mon YYYY HH:MM:SS */
"%d %b %Y %R", /* dd Mon YYYY HH:MM */
"%d %b %Y %r", /* dd Mon YYYY HH:MM:SS a.m. */
"%d %b %Y %I:%M %p", /* dd Mon YYYY HH:MM p.m. */
"%b %d, %Y %T", /* Mon dd, YYYY HH:MM:SS */
"%b %d, %Y %R", /* Mon dd, YYYY HH:MM */
"%b %d, %Y %r", /* Mon dd, YYYY HH:MM:SS a.m. */
"%b %d, %Y %I:%M %p", /* Mon dd, YYYY HH:MM p.m. */
"%m-%b-%Y", /* dd-Mon-YYYY */
"%m-%b-%Y %T", /* dd-Mon-YYYY HH:MM:SS */
"%m-%b-%Y %R", /* dd-Mon-YYYY HH:MM */
"%m-%b-%Y %r", /* dd-Mon-YYYY HH:MM:SS a.m. */
"%m-%b-%Y %I:%M %p", /* dd-Mon-YYYY HH:MM p.m. */
"%d/%b/%Y:%T %z", /* NCSA log format dd/Mon/YYYY:HH:MM:SS zone */
"%d/%b/%Y:%T%z", /* NCSA log format dd/Mon/YYYY:HH:MM:SSzone */
/* No delimiters */
"%Y%m%d %T", /* YYYYMMDD HH:MM:SS */
"%Y%m%d %R", /* YYYYMMDD HH:MM */
"%Y%m%d %r", /* YYYYMMDD HH:MM:SS a.m. */
"%Y%m%d %I:%M %p", /* YYYYMMDD HH:MM p.m. */
"%Y%m%d %H:%M:%S%z", /* YYYYMMDD HH:MM:SSzone */
"%Y%m%dT%H:%M:%S%z", /* YYYYMMDDTHH:MM:SSzone */
"%Y%m%dT%T", /* YYYYMMDDTHH:MM:SS */
"%Y%m%dT%R", /* YYYYMMDDTHH:MM */
/* Non-US formats */
"%d-%m-%Y", /* dd-mm-YYYY */
"%d-%m-%Y %T", /* dd-mm-YYYY HH:MM:SS */
"%d-%m-%Y %R", /* dd-mm-YYYY HH:MM */
"%d-%m-%Y %r", /* dd-mm-YYYY HH:MM:SS a.m. */
"%d-%m-%Y %I:%M %p", /* dd-mm-YYYY HH:MM p.m. */
"%d/%m/%Y %T", /* dd/mm/YYYY HH:MM:SS */
"%d/%m/%Y %R", /* dd/mm/YYYY HH:MM */
"%d/%m/%Y %r", /* dd/mm/YYYY HH:MM:SS a.m. */
"%d/%m/%Y %I:%M %p", /* dd/mm/YYYY HH:MM p.m. */
"%Y-%d-%m %T", /* YYYY-dd-mm HH:MM:SS */
"%Y-%d-%m %R", /* YYYY-dd-mm HH:MM */
"%d-%m-%Y %T", /* dd-mm-YYYY HH:MM:SS */
"%d-%m-%Y %R", /* dd-mm-YYYY HH:MM */
"%d-%m-%Y %r", /* dd-mm-YYYY HH:MM:SS a.m. */
"%d-%m-%Y %I:%M %p", /* dd-mm-YYYY HH:MM p.m. */
"%d.%m.%Y %T", /* dd.mm.YYYY HH:MM:SS */
"%d.%m.%Y %R", /* dd.mm.YYYY HH:MM */
"%d.%m.%Y %r", /* dd.mm.YYYY HH:MM:SS a.m. */
"%d.%m.%Y %I:%M %p", /* dd.mm.YYYY HH:MM p.m. */
/* Some fallbacks */
"%F", /* YYYY-mm-dd ISO8601 time */
"%T", /* HH:MM:SS */
"%H.%M.%S", /* HH.MM.SS */
0
};
static void
inittime (time_t *clock, struct tm *timeptr)
{
struct tm *loctime;
/* Initialize to local time */
loctime = localtime (clock);
if (loctime == 0)
{
timeptr->tm_hour = timeptr->tm_min = timeptr->tm_sec = 0;
return;
}
memcpy (timeptr, loctime, sizeof (struct tm));
/* but default to midnight */
timeptr->tm_hour = timeptr->tm_min = timeptr->tm_sec = 0;
/* and let the system figure out the right DST offset */
timeptr->tm_isdst = -1;
}
int
strptime_builtin (WORD_LIST *list)
{
char *s;
struct tm t, *tm;
time_t now, secs;
char *datestr, *format;
int i, opt;
format = NULL;
reset_internal_getopt ();
while ((opt = internal_getopt (list, "f:")) != -1)
{
switch (opt)
{
case 'f':
format = list_optarg;
break;
CASE_HELPOPT;
default:
builtin_usage ();
return (EX_USAGE);
}
}
list = loptend;
if (list == 0)
{
builtin_usage ();
return (EX_USAGE);
}
datestr = string_list (list);
if (datestr == 0 || *datestr == 0)
return (EXECUTION_SUCCESS);
now = getnow ();
secs = -1;
for (i = 0; date_time_modifiers[i].shorthand; i++)
{
if (STREQ (datestr, date_time_modifiers[i].shorthand))
{
secs = now + date_time_modifiers[i].incr;
printf ("%ld\n", secs);
return (EXECUTION_SUCCESS);
}
}
/* init struct tm */
inittime (&now, &t);
if (format)
{
s = strptime (datestr, format, &t);
if (s == 0 || s == datestr)
{
builtin_error ("%s: unrecognized format", datestr);
return (EXECUTION_FAILURE);
}
}
else
{
for (i = 0; date_time_formats[i]; i++)
{
s = strptime (datestr, date_time_formats[i], &t);
if (s == 0 || s == datestr)
continue;
break;
}
if (date_time_formats[i] == 0)
{
builtin_error ("%s: unrecognized format", datestr);
return (EXECUTION_FAILURE);
}
}
/* Found something. */
secs = mktime (&t);
if (s && *s)
builtin_warning("%s: not completely converted (%s)", datestr, s);
printf ("%ld\n", secs);
return (EXECUTION_SUCCESS);
}
char *strptime_doc[] = {
"Convert a date-time string to seconds since the epoch.",
"",
"Take DATE-TIME, a date-time string, and parse it using FORMAT, a",
"date and time format accepted by strptime(3). If FORMAT is not supplied,",
"attempt to parse DATE-TIME against a set of common date-time formats,",
"not all of which may be acceptable to strptime(3).",
"If the string matches one of the formats, convert it into seconds",
"since the epoch and display the result.",
(char *)NULL
};
/* The standard structure describing a builtin command. bash keeps an array
of these structures. The flags must include BUILTIN_ENABLED so the
builtin can be used. */
struct builtin strptime_struct = {
"strptime", /* builtin name */
strptime_builtin, /* function implementing the builtin */
BUILTIN_ENABLED, /* initial flags for builtin */
strptime_doc, /* array of long documentation strings. */
"strptime [-f format] date-time", /* usage synopsis; becomes short_doc */
0 /* reserved for internal use */
};
|
