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nspawn: be more careful when initializing the hostname from the directory name

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This commit is contained in:
Lennart Poettering 2012-04-22 01:01:22 +02:00
parent eaeb18dba9
commit 3a74cea5e4
1 changed files with 26 additions and 5 deletions
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31
src/nspawn/nspawn.c
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@ -101,8 +101,9 @@ static int parse_argv(int argc, char *argv[]) {
case 'D':
free(arg_directory);
if (!(arg_directory = strdup(optarg))) {
log_error("Failed to duplicate root directory.");
arg_directory = canonicalize_file_name(optarg);
if (!arg_directory) {
log_error("Failed to canonicalize root directory.");
return -ENOMEM;
}
@ -474,6 +475,28 @@ finish:
return r;
}
static int setup_hostname(void) {
char *hn;
int r = 0;
hn = file_name_from_path(arg_directory);
if (hn) {
hn = strdup(hn);
if (!hn)
return -ENOMEM;
hostname_cleanup(hn);
if (!isempty(hn))
if (sethostname(hn, strlen(hn)) < 0)
r = -errno;
free(hn);
}
return r;
}
static int drop_capabilities(void) {
static const unsigned long retain[] = {
CAP_CHOWN,
@ -872,7 +895,6 @@ int main(int argc, char *argv[]) {
if (pid == 0) {
/* child */
const char *hn;
const char *home = NULL;
uid_t uid = (uid_t) -1;
gid_t gid = (gid_t) -1;
@ -1000,8 +1022,7 @@ int main(int argc, char *argv[]) {
goto child_fail;
}
if ((hn = file_name_from_path(arg_directory)))
sethostname(hn, strlen(hn));
setup_hostname();
if (argc > optind)
execvpe(argv[optind], argv + optind, (char**) envp);