diff options
Diffstat (limited to 'sys-utils/nsenter.c')
| -rw-r--r-- | sys-utils/nsenter.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/sys-utils/nsenter.c b/sys-utils/nsenter.c index 106349c7e..dfb1a3b51 100644 --- a/sys-utils/nsenter.c +++ b/sys-utils/nsenter.c @@ -28,6 +28,7 @@ #include <assert.h> #include <sys/types.h> #include <sys/wait.h> +#include <grp.h> #include "strutils.h" #include "nls.h" @@ -72,6 +73,8 @@ static void usage(int status) fputs(_(" -n, --net [=<file>] enter network namespace\n"), out); fputs(_(" -p, --pid [=<file>] enter pid namespace\n"), out); fputs(_(" -U, --user [=<file>] enter user namespace\n"), out); + fputs(_(" -S, --setuid <uid> set uid in user namespace\n"), out); + fputs(_(" -G, --setgid <gid> set gid in user namespace\n"), out); fputs(_(" -r, --root [=<dir>] set the root directory\n"), out); fputs(_(" -w, --wd [=<dir>] set the working directory\n"), out); fputs(_(" -F, --no-fork do not fork before exec'ing <program>\n"), out); @@ -169,6 +172,8 @@ int main(int argc, char *argv[]) { "net", optional_argument, NULL, 'n' }, { "pid", optional_argument, NULL, 'p' }, { "user", optional_argument, NULL, 'U' }, + { "setuid", required_argument, NULL, 'S' }, + { "setgid", required_argument, NULL, 'G' }, { "root", optional_argument, NULL, 'r' }, { "wd", optional_argument, NULL, 'w' }, { "no-fork", no_argument, NULL, 'F' }, @@ -179,14 +184,16 @@ int main(int argc, char *argv[]) int c, namespaces = 0; bool do_rd = false, do_wd = false; int do_fork = -1; /* unknown yet */ + uid_t uid = 0; + gid_t gid = 0; - setlocale(LC_MESSAGES, ""); + setlocale(LC_ALL, ""); bindtextdomain(PACKAGE, LOCALEDIR); textdomain(PACKAGE); atexit(close_stdout); while ((c = - getopt_long(argc, argv, "hVt:m::u::i::n::p::U::r::w::F", + getopt_long(argc, argv, "hVt:m::u::i::n::p::U::S:G:r::w::F", longopts, NULL)) != -1) { switch (c) { case 'h': @@ -234,6 +241,12 @@ int main(int argc, char *argv[]) else namespaces |= CLONE_NEWUSER; break; + case 'S': + uid = strtoul_or_err(optarg, _("failed to parse uid")); + break; + case 'G': + gid = strtoul_or_err(optarg, _("failed to parse gid")); + break; case 'F': do_fork = 0; break; @@ -315,6 +328,15 @@ int main(int argc, char *argv[]) if (do_fork == 1) continue_as_child(); + if (namespaces & CLONE_NEWUSER) { + if (setgroups(0, NULL)) /* drop supplementary groups */ + err(EXIT_FAILURE, _("setgroups failed")); + if (setgid(gid) < 0) + err(EXIT_FAILURE, _("setgid failed")); + if (setuid(uid) < 0) + err(EXIT_FAILURE, _("setuid failed")); + } + if (optind < argc) { execvp(argv[optind], argv + optind); err(EXIT_FAILURE, _("failed to execute %s"), argv[optind]); |