Return NULL if EOF is encountered before terminating_string.
diff --git a/libbb/fgets_str.c b/libbb/fgets_str.c
index 33d8d00..4943464 100644
--- a/libbb/fgets_str.c
+++ b/libbb/fgets_str.c
@@ -19,11 +19,10 @@
#include <stdlib.h>
#include <string.h>
-/*
- * Continue reading from file until the terminating string is encountered.
- * Return data as string.
- * e.g. fgets_str(file, "\n"); will read till end of file
- */
+#include "libbb.h"
+
+/* Read up to (and including) TERMINATING_STRING from FILE and return it.
+ * Return NULL on EOF. */
char *fgets_str(FILE *file, const char *terminating_string)
{
@@ -37,12 +36,13 @@
while (1) {
ch = fgetc(file);
if (ch == EOF) {
- break;
+ free(linebuf);
+ return NULL;
}
/* grow the line buffer as necessary */
while (idx > linebufsz - 2) {
- linebuf = realloc(linebuf, linebufsz += 1000); /* GROWBY */
+ linebuf = xrealloc(linebuf, linebufsz += 1000);
}
linebuf[idx] = ch;
@@ -55,9 +55,6 @@
break;
}
}
- if (idx == 0) {
- return NULL;
- }
linebuf[idx] = '\0';
return(linebuf);
}