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authorGravatar Bastien Nocera2012-09-05 10:07:15 +0100
committerGravatar Martin Szulecki2012-09-05 14:15:37 +0200
commit825da48d2e9c20086c4e34869da0b28376676b4c (patch)
tree3e5ef66544cf6eb03cb747373f8d785c55c149b9 /src
parent060e3f2683ed2b0b08e1a31deb9608a99e193b4a (diff)
downloadlibimobiledevice-825da48d2e9c20086c4e34869da0b28376676b4c.tar.gz
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Don't crash if $HOME is empty
If both $XDG_CONFIG_HOME and $HOME are unset, we'd try to copy a NULL string, causing a crash. This is the environment systemd provides to its daemons, and that was causing upowerd to crash. http://libiphone.lighthouseapp.com/projects/27916-libiphone/tickets/273-patch-fix-segfault-when-running-with-home-unset#ticket-273-2 http://libiphone.lighthouseapp.com/projects/27916/tickets/265-userpref_get_config_dir-segfaults-when-home-is-undefined https://bugzilla.redhat.com/show_bug.cgi?id=834359
Diffstat (limited to 'src')
-rw-r--r--src/userpref.c23
1 files changed, 22 insertions, 1 deletions
diff --git a/src/userpref.c b/src/userpref.c
index a0c3545..0e774b7 100644
--- a/src/userpref.c
+++ b/src/userpref.c
@@ -102,6 +102,20 @@ static char *userpref_utf16_to_utf8(wchar_t *unistr, long len, long *items_read,
}
#endif
+static const char *userpref_get_tmp_dir()
+{
+ const char *cdir = getenv("TMPDIR");
+ if (cdir && cdir[0])
+ return cdir;
+ cdir = getenv("TMP");
+ if (cdir && cdir[0])
+ return cdir;
+ cdir = getenv("TEMP");
+ if (cdir && cdir[0])
+ return cdir;
+ return "/tmp";
+}
+
static const char *userpref_get_config_dir()
{
if (__config_dir[0]) return __config_dir;
@@ -125,7 +139,14 @@ static const char *userpref_get_config_dir()
const char *cdir = getenv("XDG_CONFIG_HOME");
if (!cdir) {
cdir = getenv("HOME");
- strcpy(__config_dir, cdir);
+ if (!cdir || !cdir[0]) {
+ const char *tdir = userpref_get_tmp_dir();
+ strcpy(__config_dir, tdir);
+ strcat(__config_dir, DIR_SEP_S);
+ strcat(__config_dir, "root");
+ } else {
+ strcpy(__config_dir, cdir);
+ }
strcat(__config_dir, DIR_SEP_S);
strcat(__config_dir, ".config");
} else {