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Better formatting for pax extended header times

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As specified, don't include the subsecond part if zero and drop trailing
zeros in the subsecond part.  ok millert@
This commit is contained in:
jca 2024-01-20 17:34:50 +00:00
parent 38558285c9
commit b54e157770
1 changed files with 20 additions and 5 deletions
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25
bin/pax/tar.c
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@ -1,4 +1,4 @@
/* $OpenBSD: tar.c,v 1.78 2023/12/27 08:29:41 jca Exp $ */
/* $OpenBSD: tar.c,v 1.79 2024/01/20 17:34:50 jca Exp $ */
/* $NetBSD: tar.c,v 1.5 1995/03/21 09:07:49 cgd Exp $ */
/*-
@ -984,13 +984,28 @@ xheader_add_ts(struct xheader *xhdr, const char *keyword,
{
struct xheader_record *rec;
int reclen, tmplen;
char frac[sizeof(".111222333")] = "";
char *s;
/* Only write subsecond part if non-zero */
if (value->tv_nsec != 0) {
int n;
n = snprintf(frac, sizeof(frac), ".%09ld",
(long)value->tv_nsec);
if (n <= 0)
return -1;
/* Zap trailing zeros */
for (n--; n > 1 && frac[n] == '0'; n--)
frac[n] = '\0';
}
tmplen = MINXHDRSZ;
do {
reclen = tmplen;
tmplen = snprintf(NULL, 0, "%d %s=%lld.%09ld\n", reclen,
keyword, (long long)value->tv_sec, (long)value->tv_nsec);
tmplen = snprintf(NULL, 0, "%d %s=%lld%s\n", reclen,
keyword, (long long)value->tv_sec, frac);
} while (tmplen >= 0 && tmplen != reclen);
if (tmplen < 0)
return -1;
@ -999,8 +1014,8 @@ xheader_add_ts(struct xheader *xhdr, const char *keyword,
if (rec == NULL)
return -1;
rec->reclen = reclen;
if (asprintf(&s, "%d %s=%lld.%09ld\n", reclen, keyword,
(long long)value->tv_sec, (long)value->tv_nsec) < 0) {
if (asprintf(&s, "%d %s=%lld%s\n", reclen, keyword,
(long long)value->tv_sec, frac) < 0) {
free(rec);
return -1;
}