scdoc: do not use a GNU-extension for parsing

srcpkgs/scdoc/patches/musl.patch

@@ -0,0 +1,90 @@
+From 599a615cb84799e1a50764ebecb27b459f629a3f Mon Sep 17 00:00:00 2001
+From: Silvan Jegen <s.jegen@gmail.com>
+Date: Wed, 2 Jan 2019 01:01:49 +0100
+Subject: [PATCH] Don't use a GNU-extension for $SOURCE_DATE_EPOCH parsing
+
+Code gratefully copied from the link below.
+
+https://reproducible-builds.org/docs/source-date-epoch/#c
+---
+ src/main.c | 44 +++++++++++++++++++++++++++++++++-----------
+ 1 file changed, 33 insertions(+), 11 deletions(-)
+
+diff --git a/src/main.c b/src/main.c
+index 645d521..eab674e 100644
+--- src/main.c
++++ src/main.c
+@@ -1,6 +1,8 @@
+ #define _XOPEN_SOURCE 600
+ #include <assert.h>
+ #include <ctype.h>
++#include <errno.h>
++#include <limits.h>
+ #include <stdbool.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+@@ -11,6 +13,7 @@
+ #include "util.h"
+ 
+ char *strstr(const char *haystack, const char *needle);
++char *strerror(int errnum);
+ 
+ static int parse_section(struct parser *p) {
+ 	str_t *section = str_create();
+@@ -67,23 +70,42 @@ static void parse_preamble(struct parser *p) {
+ 	str_t *extras[2] = { NULL };
+ 	int section = -1;
+ 	uint32_t ch;
++	time_t date_time;
+ 	char date[256];
+ 	char *source_date_epoch = getenv("SOURCE_DATE_EPOCH");
+ 	if (source_date_epoch != NULL) {
+-		struct tm source_date_epoch_tm;
+-		char *ret = strptime(source_date_epoch, "%s", &source_date_epoch_tm);
+-		if (ret == NULL || *ret != '\0') {
+-			fprintf(stderr,
+-					"Error: $SOURCE_DATE_EPOCH is set but malformed.\n");
+-			exit(1);
++		unsigned long long epoch;
++		char *endptr;
++		errno = 0;
++		epoch = strtoull(source_date_epoch, &endptr, 10);
++		if ((errno == ERANGE && (epoch == ULLONG_MAX || epoch == 0))
++				|| (errno != 0 && epoch == 0)) {
++			fprintf(stderr, "$SOURCE_DATE_EPOCH: strtoull: %s\n",
++					strerror(errno));
++			exit(EXIT_FAILURE);
+ 		}
+-		strftime(date, sizeof(date), "%F", &source_date_epoch_tm);
++		if (endptr == source_date_epoch) {
++			fprintf(stderr, "$SOURCE_DATE_EPOCH: No digits were found: %s\n",
++					endptr);
++			exit(EXIT_FAILURE);
++		}
++		if (*endptr != '\0') {
++			fprintf(stderr, "$SOURCE_DATE_EPOCH: Trailing garbage: %s\n",
++					endptr);
++			exit(EXIT_FAILURE);
++		}
++		if (epoch > ULONG_MAX) {
++			fprintf(stderr, "$SOURCE_DATE_EPOCH: value must be smaller than or "
++					"equal to %lu but was found to be: %llu \n",
++					ULONG_MAX, epoch);
++			exit(EXIT_FAILURE);
++		}
++		date_time = epoch;
+ 	} else {
+-		time_t now;
+-		time(&now);
+-		struct tm *now_tm = localtime(&now);
+-		strftime(date, sizeof(date), "%F", now_tm);
++		date_time = time(NULL);
+ 	}
++	struct tm *date_tm = localtime(&date_time);
++	strftime(date, sizeof(date), "%F", date_tm);
+ 	while ((ch = parser_getch(p)) != UTF8_INVALID) {
+ 		if ((ch < 0x80 && isalnum(ch)) || ch == '_' || ch == '-' || ch == '.') {
+ 			int ret = str_append_ch(name, ch);
+-- 
+2.18.1
+

srcpkgs/scdoc/template

@@ -1,7 +1,7 @@
 # Template file for 'scdoc'
 pkgname=scdoc
 version=1.6.0
-revision=1
+revision=2
 build_style=gnu-makefile
 short_desc="Tool for generating roff manual pages"
 maintainer="Julio Galvan <juliogalvan@protonmail.com>"