Fix various memory management issues

Consistently handle allocation failures. Some functions are changed to
return bool or int instead of void to allow returning an error.

Also fix a buffer size miscalculation in lua/uloop and use _exit() instead
of exit() on errors after forking.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/jshn.c b/jshn.c
index e2d9022..4989099 100644
--- a/jshn.c
+++ b/jshn.c
@@ -338,6 +338,10 @@ int main(int argc, char **argv)
 	for (i = 0; environ[i]; i++);
 
 	vars = calloc(i, sizeof(*vars));
+	if (!vars) {
+		fprintf(stderr, "%m\n");
+		return -1;
+	}
 	for (i = 0; environ[i]; i++) {
 		char *c;