handle invalid values of strto*l

Signed-off-by: Hiltjo Posthuma <hiltjo@codemadness.org>

5 files changed, 17 insertions, 2 deletions

diff --git a/sfeed.c b/sfeed.c
index f7fdb82..70ab46a 100644
--- a/sfeed.c
+++ b/sfeed.c
@@ -188,7 +188,7 @@ entitytostr(const char *e, char *buffer, size_t bufsiz) {
 			l = strtoul(e + 1, NULL, 16); /* hex */
 		else
 			l = strtoul(e, NULL, 10); /* decimal */
-		if(errno != 0 || !l)
+		if(errno != 0)
 			return 0; /* invalid value */
 		if(!(len = codepointtoutf8(l, &cp)))
 			return 0;
diff --git a/sfeed_frames.c b/sfeed_frames.c
index 8496311..683f9e0 100644
--- a/sfeed_frames.c
+++ b/sfeed_frames.c
@@ -7,8 +7,8 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <utime.h>
-#include <errno.h>
 #include <limits.h>
+#include <errno.h>
 
 #include "util.h"
 
@@ -216,7 +216,10 @@ main(int argc, char **argv) {
 		}
 
 		/* write item. */
+		errno = 0;
 		parsedtime = (time_t)strtol(fields[FieldUnixTimestamp], NULL, 10);
+		if(errno != 0)
+			parsedtime = 0;
 		/* set modified and access time of file to time of item. */
 		contenttime.actime = parsedtime;
 		contenttime.modtime = parsedtime;
diff --git a/sfeed_html.c b/sfeed_html.c
index afd3e4c..8ba798b 100644
--- a/sfeed_html.c
+++ b/sfeed_html.c
@@ -3,6 +3,7 @@
 #include <stdlib.h>
 #include <time.h>
 #include <ctype.h>
+#include <errno.h>
 
 #include "util.h"
 
@@ -50,7 +51,10 @@ main(void) {
 	feeds = fcur;
 
 	while(parseline(&line, &size, fields, FieldLast, '\t', stdin) > 0) {
+		errno = 0;
 		parsedtime = (time_t)strtol(fields[FieldUnixTimestamp], NULL, 10);
+		if(errno != 0)
+			parsedtime = 0;
 		isnew = (parsedtime >= comparetime) ? 1 : 0;
 		islink = (fields[FieldLink][0] != '\0') ? 1 : 0;
 		/* first of feed section or new feed section. */
diff --git a/sfeed_plain.c b/sfeed_plain.c
index ca5756b..f57a8c8 100644
--- a/sfeed_plain.c
+++ b/sfeed_plain.c
@@ -2,6 +2,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <time.h>
+#include <errno.h>
 
 #include "util.h"
 
@@ -27,7 +28,10 @@ main(void) {
 
 	comparetime = time(NULL) - (3600 * 24); /* 1 day is old news */
 	while(parseline(&line, &size, fields, FieldLast, '\t', stdin) > 0) {
+		errno = 0;
 		parsedtime = (time_t)strtol(fields[FieldUnixTimestamp], NULL, 10);
+		if(errno != 0)
+			parsedtime = 0;
 		if(parsedtime >= comparetime)
 			fputs(" N  ", stdout);
 		else
diff --git a/sfeed_stats.c b/sfeed_stats.c
index 3773e4a..a750dc1 100644
--- a/sfeed_stats.c
+++ b/sfeed_stats.c
@@ -3,6 +3,7 @@
 #include <stdlib.h>
 #include <time.h>
 #include <ctype.h>
+#include <errno.h>
 
 #include "util.h"
 
@@ -40,7 +41,10 @@ main(void) {
 	feeds = fcur;
 
 	while(parseline(&line, &size, fields, FieldLast, '\t', stdin) > 0) {
+		errno = 0;
 		parsedtime = (time_t)strtol(fields[FieldUnixTimestamp], NULL, 10);
+		if(errno != 0)
+			parsedtime = 0;
 		isnew = (parsedtime >= comparetime) ? 1 : 0;
 		/* first of feed section or new feed section. */
 		if(!totalfeeds || (fcur && strcmp(fcur->name, fields[FieldFeedName]))) {