utils

commit: 7932f1f9f6bad98421775e7c35d5d6842fc908b8
parent a8e5ae5109b2b4805d7d965f480318b2afe85206
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Sat, 16 Sep 2023 06:09:12 +0200

cmd/sleep: handle sscanf not changing errno

Diffstat:
M
cmd/sleep.c
23
++++++++++++++++-------

1 file changed, 16 insertions(+), 7 deletions(-)
diff --git a/cmd/sleep.c b/cmd/sleep.c
@@ -23,8 +23,9 @@ strtodur(char *s)
 	int parsed = 0;
 	if(s[0] != '.' && s[0] != ',')
 	{
-		errno = 0;
-		if(sscanf(s, "%10ld%n", &dur.tv_sec, &parsed) < 1)
+		errno   = 0;
+		int ret = sscanf(s, "%10ld%n", &dur.tv_sec, &parsed);
+		if(ret < 1)
 		{
 			if(errno == 0)
 			{
@@ -44,14 +45,22 @@ strtodur(char *s)
 
 	if(s[0] == '.' || s[0] == ',')
 	{
-		double fraction = 0.0;
+		float fraction = 0.0;
+		if(s[1] == 0) return dur;
 		if(s[0] == ',') s[0] = '.';
 
 		parsed = 0;
 		errno  = 0;
-		if(sscanf(s, "%10lf%n", &fraction, &parsed) < 1)
+		if(sscanf(s, "%10f%n", &fraction, &parsed) < 1)
 		{
-			perror("sleep: sscanf");
+			if(errno == 0)
+			{
+				fprintf(stderr, "sleep: Decimal part is not a number: %s\n", s);
+			}
+			else
+			{
+				perror("sleep: sscanf");
+			}
 			exit(EXIT_FAILURE);
 		}
 
@@ -107,7 +116,7 @@ main(int argc, char *argv[])
 		return 1;
 	}
 
-	//fprintf(stderr, "sleep: going to sleep for %ld.%ld seconds\n", dur.tv_sec, dur.tv_nsec);
+	//fprintf(stderr, "sleep: going to sleep for %ld.%09ld seconds\n", dur.tv_sec, dur.tv_nsec);
 
 	errno = 0;
 	if(nanosleep(&dur, &dur) < 0)
@@ -115,7 +124,7 @@ main(int argc, char *argv[])
 		if(errno == EINTR)
 		{
 			fprintf(stderr,
-			        "sleep: Interrupted during sleep, still had %ld.%ld seconds remaining\n",
+			        "sleep: Interrupted during sleep, still had %ld.%09ld seconds remaining\n",
 			        dur.tv_sec,
 			        dur.tv_nsec);
 		}