io/fdpass: new module for async fd passing.

[ccan] / ccan / pipecmd / pipecmd.c

diff --git a/ccan/pipecmd/pipecmd.c b/ccan/pipecmd/pipecmd.c
index 42c6689445876e5b832520bd55a1e1aecf288c43..32772a83bc7b69c96cff57747aa779771f2e7604 100644 (file)
--- a/ccan/pipecmd/pipecmd.c
+++ b/ccan/pipecmd/pipecmd.c
@@ -16,9 +16,12 @@ static char **gather_args(const char *arg0, va_list ap)
        arr[0] = (char *)arg0;
 
        while ((arr[n++] = va_arg(ap, char *)) != NULL) {
-               arr = realloc(arr, sizeof(char *) * (n + 1));
-               if (!arr)
+               char **narr = realloc(arr, sizeof(char *) * (n + 1));
+               if (!narr) {
+                       free(arr);
                        return NULL;
+               }
+               arr = narr;
        }
        return arr;
 }
@@ -119,7 +122,10 @@ pid_t pipecmdarr(int *fd_fromchild, int *fd_tochild, int *fd_errfromchild,
 
        child_errno_fail:
                err = errno;
-               write(execfail[1], &err, sizeof(err));
+               /* Gcc's warn-unused-result fail. */
+               if (write(execfail[1], &err, sizeof(err))) {
+                       ;
+               }
                exit(127);
        }