diff options
Diffstat (limited to 'utils/settrans.c')
| -rw-r--r-- | utils/settrans.c | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/utils/settrans.c b/utils/settrans.c index cd40c56f..00cc358c 100644 --- a/utils/settrans.c +++ b/utils/settrans.c @@ -18,6 +18,7 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ +#include <assert.h> #include <hurd.h> #include <stdio.h> #include <stdlib.h> @@ -45,6 +46,8 @@ const char *argp_program_version = STANDARD_HURD_VERSION (settrans); #define _STRINGIFY(arg) #arg #define STRINGIFY(arg) _STRINGIFY (arg) +#define OPT_CHROOT_CHDIR -1 + static struct argp_option options[] = { {"active", 'a', 0, 0, "Start TRANSLATOR and set it as NODE's active translator" }, @@ -65,6 +68,9 @@ static struct argp_option options[] = {"chroot", 'C', 0, 0, "Instead of setting the node's translator, take following arguments up to" " `--' and run that command chroot'd to the translated node."}, + {"chroot-chdir", OPT_CHROOT_CHDIR, "DIR", 0, + "Change to DIR before running the chrooted command. " + "DIR must be an absolute path."}, {0,0,0,0, "When setting the passive translator, if there's an active translator:"}, {"goaway", 'g', 0, 0, "Ask the active translator to go away"}, @@ -114,6 +120,7 @@ main(int argc, char *argv[]) int excl = 0; int timeout = DEFAULT_TIMEOUT * 1000; /* ms */ char **chroot_command = 0; + char *chroot_chdir = "/"; /* Parse our options... */ error_t parse_opt (int key, char *arg, struct argp_state *state) @@ -183,6 +190,12 @@ main(int argc, char *argv[]) argp_error (state, "--chroot command must be terminated with `--'"); return EINVAL; + case OPT_CHROOT_CHDIR: + if (arg[0] != '/') + argp_error (state, "--chroot-chdir must be absolute"); + chroot_chdir = arg; + break; + case 'c': lookup_flags |= O_CREAT; break; case 'L': lookup_flags &= ~O_NOTRANS; break; @@ -325,6 +338,8 @@ main(int argc, char *argv[]) char retry_name[1024]; /* XXX */ retry_type do_retry; mach_port_t root; + file_t executable; + char *prefixed_name; err = fsys_getroot (active_control, MACH_PORT_NULL, MACH_MSG_TYPE_COPY_SEND, NULL, 0, NULL, 0, 0, @@ -341,8 +356,21 @@ main(int argc, char *argv[]) if (setcrdir (root)) error (7, errno, "cannot install root port"); mach_port_deallocate (mach_task_self (), root); - if (chdir ("/")) - error (8, errno, "cannot chdir to new root"); + if (chdir (chroot_chdir)) + error (8, errno, "%s", chroot_chdir); + + /* Lookup executable in PATH. */ + executable = file_name_path_lookup (chroot_command[0], + getenv ("PATH"), + O_EXEC, 0, + &prefixed_name); + if (MACH_PORT_VALID (executable)) + { + err = mach_port_deallocate (mach_task_self (), executable); + assert_perror (err); + if (prefixed_name) + chroot_command[0] = prefixed_name; + } execvp (chroot_command[0], chroot_command); error (8, errno, "cannot execute %s", chroot_command[0]); |