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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-06-26 16:18:37 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-06-26 16:18:37 +0000
commitb6b00dd55e035bfbe311a527b567962ffa77ee43 (patch)
treecafc4d13785448e5a78bd40a51697ee07f07ac12 /lib/strtoday.c
parentAdding debian version 1:4.13+dfsg1-5. (diff)
downloadshadow-b6b00dd55e035bfbe311a527b567962ffa77ee43.tar.xz
shadow-b6b00dd55e035bfbe311a527b567962ffa77ee43.zip
Merging upstream version 1:4.15.2.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/strtoday.c')
-rw-r--r--lib/strtoday.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/lib/strtoday.c b/lib/strtoday.c
new file mode 100644
index 0000000..dabd5b5
--- /dev/null
+++ b/lib/strtoday.c
@@ -0,0 +1,77 @@
+/*
+ * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1999, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008 , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#include <ctype.h>
+
+#ident "$Id$"
+
+#include "atoi/str2i.h"
+#include "prototypes.h"
+#include "getdate.h"
+
+
+/*
+ * strtoday() now uses get_date() (borrowed from GNU shellutils)
+ * which can handle many date formats, for example:
+ * 1970-09-17 # ISO 8601.
+ * 70-9-17 # This century assumed by default.
+ * 70-09-17 # Leading zeros are ignored.
+ * 9/17/72 # Common U.S. writing.
+ * 24 September 1972
+ * 24 Sept 72 # September has a special abbreviation.
+ * 24 Sep 72 # Three-letter abbreviations always allowed.
+ * Sep 24, 1972
+ * 24-sep-72
+ * 24sep72
+ */
+long strtoday (const char *str)
+{
+ time_t t;
+ bool isnum = true;
+ const char *s = str;
+
+ /*
+ * get_date() interprets an empty string as the current date,
+ * which is not what we expect, unless you're a BOFH :-).
+ * (useradd sets sp_expire = current date for new lusers)
+ */
+ if ((NULL == str) || ('\0' == *str)) {
+ return -1;
+ }
+
+ /* If a numerical value is provided, this is already a number of
+ * days since EPOCH.
+ */
+ if ('-' == *s) {
+ s++;
+ }
+ while (' ' == *s) {
+ s++;
+ }
+ while (isnum && ('\0' != *s)) {
+ if (!isdigit (*s)) {
+ isnum = false;
+ }
+ s++;
+ }
+ if (isnum) {
+ long retdate;
+ if (str2sl(&retdate, str) == -1)
+ return -2;
+ return retdate;
+ }
+
+ t = get_date(str, NULL);
+ if ((time_t) - 1 == t) {
+ return -2;
+ }
+ return t / DAY;
+}