69 lines
1.8 KiB
Diff
69 lines
1.8 KiB
Diff
|
From dca583ac625cbbc21b5a795ef36d1f90fabbcce7 Mon Sep 17 00:00:00 2001
|
|||
|
|
From: Paul Eggert <eggert@cs.ucla.edu>
|
|||
|
|
Date: Sun, 9 Aug 2020 10:42:02 -0700
|
|||
|
|
Subject: [PATCH 25/47] date: redo strftime buffer-exhaustion check
|
|||
|
|
MIME-Version: 1.0
|
|||
|
|
Content-Type: text/plain; charset=UTF-8
|
|||
|
|
Content-Transfer-Encoding: 8bit
|
|||
|
|
|
|||
|
|
Suggested by Robert Elz in:
|
|||
|
|
https://mm.icann.org/pipermail/tz/2020-August/029193.html
|
|||
|
|
* date.c (main, display): Record the format’s leading '+' too.
|
|||
|
|
(timeout): Format the leading '+' too; just don’t output it.
|
|||
|
|
This simplifies checking for buffer exhaustion, given strftime’s
|
|||
|
|
somewhat-lame API.
|
|||
|
|
---
|
|||
|
|
date.c | 11 ++++-------
|
|||
|
|
1 file changed, 4 insertions(+), 7 deletions(-)
|
|||
|
|
|
|||
|
|
diff --git a/date.c b/date.c
|
|||
|
|
index 2cc533f..ce63bf3 100644
|
|||
|
|
--- a/date.c
|
|||
|
|
+++ b/date.c
|
|||
|
|
@@ -112,7 +112,7 @@ main(const int argc, char *argv[])
|
|||
|
|
cp = argv[optind++];
|
|||
|
|
if (*cp == '+')
|
|||
|
|
if (format == NULL)
|
|||
|
|
- format = cp + 1;
|
|||
|
|
+ format = cp;
|
|||
|
|
else {
|
|||
|
|
fprintf(stderr,
|
|||
|
|
_("date: error: multiple formats in command line\n"));
|
|||
|
|
@@ -186,7 +186,7 @@ display(char const *format, time_t now)
|
|||
|
|
errensure();
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
- timeout(stdout, format ? format : "%+", tmp);
|
|||
|
|
+ timeout(stdout, format ? format : "+%+", tmp);
|
|||
|
|
putchar('\n');
|
|||
|
|
fflush(stdout);
|
|||
|
|
fflush(stderr);
|
|||
|
|
@@ -207,8 +207,6 @@ timeout(FILE *fp, char const *format, struct tm const *tmp)
|
|||
|
|
size_t size;
|
|||
|
|
struct tm tm;
|
|||
|
|
|
|||
|
|
- if (*format == '\0')
|
|||
|
|
- return;
|
|||
|
|
if (!tmp) {
|
|||
|
|
fprintf(stderr, _("date: error: time out of range\n"));
|
|||
|
|
errensure();
|
|||
|
|
@@ -225,13 +223,12 @@ timeout(FILE *fp, char const *format, struct tm const *tmp)
|
|||
|
|
errensure();
|
|||
|
|
exit(retval);
|
|||
|
|
}
|
|||
|
|
- cp[0] = '\1';
|
|||
|
|
result = strftime(cp, size, format, tmp);
|
|||
|
|
- if (result != 0 || cp[0] == '\0')
|
|||
|
|
+ if (result != 0)
|
|||
|
|
break;
|
|||
|
|
size += INCR;
|
|||
|
|
cp = realloc(cp, size);
|
|||
|
|
}
|
|||
|
|
- fwrite(cp, 1, result, fp);
|
|||
|
|
+ fwrite(cp + 1, 1, result - 1, fp);
|
|||
|
|
free(cp);
|
|||
|
|
}
|
|||
|
|
--
|
|||
|
|
1.8.3.1
|
|||
|
|
|