If getpwuid() fails and also the fallback of spawning of a 'getent' process, and the user specified no command to execute, default to /bin/sh and only fail if even that is not available. This should ensure that unless the container is *really* weird, no matter what, the user should always end up with a shell when calling lxc-attach with no further arguments.
Signed-off-by: Christian Seiler <christ...@iwakd.de> --- src/lxc/lxc_attach.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/src/lxc/lxc_attach.c b/src/lxc/lxc_attach.c index c129eb0..711e1de 100644 --- a/src/lxc/lxc_attach.c +++ b/src/lxc/lxc_attach.c @@ -452,15 +452,21 @@ int main(int argc, char *argv[]) else user_shell = passwd->pw_shell; - if (!user_shell) { - SYSERROR("failed to get passwd " \ - "entry for uid '%d'", uid); - return -1; + if (user_shell) { + char *const args[] = { + user_shell, + NULL, + }; + + (void) execvp(args[0], args); } + /* executed if either no passwd entry or execvp fails, + * we will fall back on /bin/sh as a default shell + */ { char *const args[] = { - user_shell, + "/bin/sh", NULL, }; -- 1.7.10.4 ------------------------------------------------------------------------------ Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev _______________________________________________ Lxc-devel mailing list Lxc-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-devel