[libvirt] [PATCH] virconf: properly set the end of content

[Jim Fehlig]

There was a recent report of the xen-xl converter not handling
config files missing an ending newline

https://www.redhat.com/archives/libvir-list/2017-October/msg01353.html

Commit 3cc2a9e0 fixed a similar problem when parsing content of a
file but missed parsing in-memory content. But AFAICT, the better
fix is to properly set the end of the content when initializing the
virConfParserCtxt in virConfParse().

This commit reverts the part of 3cc2a9e0 that appends a newline to
files missing it, and fixes setting the end of content when
initializing virConfParserCtxt.

Signed-off-by: Jim Fehlig <jfehlig at suse.com>
---
 src/util/virconf.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/src/util/virconf.c b/src/util/virconf.c
index 39c2bd917..a82a509ca 100644
--- a/src/util/virconf.c
+++ b/src/util/virconf.c
@@ -705,7 +705,7 @@ virConfParse(const char *filename, const char *content, int len,
 
     ctxt.filename = filename;
     ctxt.base = ctxt.cur = content;
-    ctxt.end = content + len - 1;
+    ctxt.end = content + len;
     ctxt.line = 1;
 
     ctxt.conf = virConfCreate(filename, flags);
@@ -745,7 +745,7 @@ virConfReadFile(const char *filename, unsigned int flags)
 {
     char *content;
     int len;
-    virConfPtr conf = NULL;
+    virConfPtr conf;
 
     VIR_DEBUG("filename=%s", NULLSTR(filename));
 
@@ -757,17 +757,8 @@ virConfReadFile(const char *filename, unsigned int flags)
     if ((len = virFileReadAll(filename, MAX_CONFIG_FILE_SIZE, &content)) < 0)
         return NULL;
 
-    if (len && len < MAX_CONFIG_FILE_SIZE && content[len - 1] != '\n') {
-        VIR_DEBUG("appending newline to busted config file %s", filename);
-        if (VIR_REALLOC_N(content, len + 2) < 0)
-            goto cleanup;
-        content[len++] = '\n';
-        content[len] = '\0';
-    }
-
     conf = virConfParse(filename, content, len, flags);
 
- cleanup:
     VIR_FREE(content);
 
     return conf;
-- 
2.14.2