[Xen-changelog] [xen master] libxl: fix _SC_GETPW_R_SIZE_MAX usage

[patchbot@xxxxxxx]

commit 2155a0ec7d693a05553e515ce1a1d3783fdc8e53
Author:     Roger Pau Monne <roger.pau@xxxxxxxxxx>
AuthorDate: Thu Jan 14 16:06:50 2016 +0100
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Fri Jan 15 10:32:24 2016 +0000

    libxl: fix _SC_GETPW_R_SIZE_MAX usage

    If sysconf(_SC_GETPW_R_SIZE_MAX) fails for any reason just use an initial
    buffer size of 2048. This is not a critical failure, and the code that
    makes use of this buffer is able to expand it later if required.

    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 tools/libxl/libxl_dm.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c
index 0aaefd9..a088d71 100644
--- a/tools/libxl/libxl_dm.c
+++ b/tools/libxl/libxl_dm.c
@@ -730,9 +730,10 @@ static int libxl__dm_runas_helper(libxl__gc *gc, const 
char *username)

     buf_size = sysconf(_SC_GETPW_R_SIZE_MAX);
     if (buf_size < 0) {
-        LOGE(ERROR, "sysconf(_SC_GETPW_R_SIZE_MAX) returned error %ld",
-                buf_size);
-        return ERROR_FAIL;
+        buf_size = 2048;
+        LOG(DEBUG,
+"sysconf(_SC_GETPW_R_SIZE_MAX) failed, setting the initial buffer size to %ld",
+            buf_size);
     }

     while (1) {
--
generated by git-patchbot for /home/xen/git/xen.git#master

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