From: Tobias Oetiker <tobi@oetiker.ch>
Date: Sun, 7 Jun 2009 14:27:52 +0000 (+0000)
Subject: check return value from write
X-Git-Tag: 1.4.0~87
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=15074b4b5974becd8adaa79fe1d1c39c4f3b7e5c;p=thirdparty%2Frrdtool-1.x.git

check return value from write


git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@1851 a5681a0c-68f1-0310-ab6d-d61299d08faa
---

diff --git a/src/rrd_open.c b/src/rrd_open.c
index d09f640d..03cc5b9a 100644
--- a/src/rrd_open.c
+++ b/src/rrd_open.c
@@ -216,7 +216,10 @@ rrd_file_t *rrd_open(
     } else {
         rrd_file->file_len = newfile_size;
         lseek(rrd_simple_file->fd, newfile_size - 1, SEEK_SET);
-        write(rrd_simple_file->fd, "\0", 1);   /* poke */
+        if ( write(rrd_simple_file->fd, "\0", 1) == -1){    /* poke */
+            rrd_set_error("write '%s': %s", file_name, rrd_strerror(errno));
+            goto out_close;
+        }
         lseek(rrd_simple_file->fd, 0, SEEK_SET);
     }
 #ifdef HAVE_POSIX_FADVISE