xmalloc_[open_]read[_close]: do not ignore xrealloc return value

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

2 files changed, 8 insertions, 2 deletions

diff --git a/include/libbb.h b/include/libbb.h
index 128aa9207..bae7efb00 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -965,6 +965,12 @@ enum {
         /* How long the longest ESC sequence we know? */
         KEYCODE_BUFFER_SIZE = 4
 };
+/* Note: fd may be in blocking or non-blocking mode, both make sense.
+ * For one, less uses non-blocking mode.
+ * Only the first read syscall inside read_key may block indefinitely
+ * (unless fd is in non-blocking mode),
+ * subsequent reads will time out after a few milliseconds.
+ */
 int read_key(int fd, smalluint *nbuffered, char *buffer) FAST_FUNC;
 
 
diff --git a/libbb/read.c b/libbb/read.c
index a0c0cc64a..b58982b32 100644
--- a/libbb/read.c
+++ b/libbb/read.c
@@ -229,7 +229,7 @@ void* FAST_FUNC xmalloc_read(int fd, size_t *maxsz_p)
                 if (size > 64*1024)
                         size = 64*1024;
         }
-        xrealloc(buf, total + 1);
+        buf = xrealloc(buf, total + 1);
         buf[total] = '\0';
 
         if (maxsz_p)
@@ -273,7 +273,7 @@ void* FAST_FUNC xmalloc_open_read_close(const char *filename, size_t *maxsz_p)
                 free(buf);
                 return NULL;
         }
-        xrealloc(buf, size + 1);
+        buf = xrealloc(buf, size + 1);
         buf[size] = '\0';
 
         if (maxsz_p)