usernsexec: init log fd

lxc-usernsexec uses some functions (e.g. lxc_map_ids()), which are part of the lxc library and thus use the WARN etc. macros to emit log messages. However, it doesn't initialize the log in any way, so these messages go into the ether. lxc-usernsexec currently has no log parameters, so let's just log these to stderr. Someone can do something fancier later if they want. Signed-off-by: Tycho Andersen <tycho@tycho.ws>

usernsexec: init log fd
2d22b22d · Tycho Andersen · f392f4ed · 2d22b22d
Commit 2d22b22d authored Mar 12, 2018 by Tycho Andersen
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lxc_usernsexec.c src/lxc/cmd/lxc_usernsexec.c +4 -0

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--- a/src/lxc/cmd/lxc_usernsexec.c
+++ b/src/lxc/cmd/lxc_usernsexec.c
@@ -53,6 +53,8 @@
 #define MS_SLAVE (1 << 19)
 #endif

+extern int lxc_log_fd;
+
 int unshare(int flags);

 static void usage(const char *name)
@@ -274,6 +276,8 @@ int main(int argc, char *argv[])
 	int pipe1[2],  /* child tells parent it has unshared */
 	    pipe2[2];  /* parent tells child it is mapped and may proceed */

+	lxc_log_fd = STDERR_FILENO;
+
 	memset(ttyname0, '\0', sizeof(ttyname0));
 	memset(ttyname1, '\0', sizeof(ttyname1));
 	memset(ttyname2, '\0', sizeof(ttyname2));