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Move runas handling from vl.c to OS specific files.

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Move code to handle runas, ie. change of user id of QEMU process
to OS specific files and provide dummy stub for Win32.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Acked-by: Juan Quintela <quintela@redhat.com>
Acked-by: Richard Henderson <rth@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Jes Sorensen 2010-06-10 11:42:26 +02:00 committed by Blue Swirl
parent 59a5264b99
commit 8847cfe8aa
4 changed files with 31 additions and 28 deletions
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28
os-posix.c
View File

@ -28,6 +28,7 @@
#include <signal.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <pwd.h>
#include <libgen.h>
/* Needed early for CONFIG_BSD etc. */
@ -36,6 +37,8 @@
#include "net/slirp.h"
#include "qemu-options.h"
static struct passwd *user_pwd;
void os_setup_early_signal_handling(void)
{
struct sigaction act;
@ -146,6 +149,31 @@ void os_parse_cmd_args(int index, const char *optarg)
exit(1);
break;
#endif
case QEMU_OPTION_runas:
user_pwd = getpwnam(optarg);
if (!user_pwd) {
fprintf(stderr, "User \"%s\" doesn't exist\n", optarg);
exit(1);
}
break;
}
return;
}
void os_change_process_uid(void)
{
if (user_pwd) {
if (setgid(user_pwd->pw_gid) < 0) {
fprintf(stderr, "Failed to setgid(%d)\n", user_pwd->pw_gid);
exit(1);
}
if (setuid(user_pwd->pw_uid) < 0) {
fprintf(stderr, "Failed to setuid(%d)\n", user_pwd->pw_uid);
exit(1);
}
if (setuid(0) != -1) {
fprintf(stderr, "Dropping privileges failed\n");
exit(1);
}
}
}

1
qemu-os-posix.h
View File

@ -31,5 +31,6 @@ static inline void os_host_main_loop_wait(int *timeout)
}
void os_setup_signal_handling(void);
void os_change_process_uid(void);
#endif

1
qemu-os-win32.h
View File

@ -43,5 +43,6 @@ void qemu_del_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque);
void os_host_main_loop_wait(int *timeout);
static inline void os_setup_signal_handling(void) {}
static inline void os_change_process_uid(void) {}
#endif

29
vl.c
View File

@ -34,7 +34,6 @@
#ifndef _WIN32
#include <libgen.h>
#include <pwd.h>
#include <sys/times.h>
#include <sys/wait.h>
#include <termios.h>
@ -2310,9 +2309,7 @@ int main(int argc, char **argv, char **envp)
const char *incoming = NULL;
#ifndef _WIN32
int fd = 0;
struct passwd *pwd = NULL;
const char *chroot_dir = NULL;
const char *run_as = NULL;
#endif
int show_vnc_port = 0;
int defconfig = 1;
@ -3060,9 +3057,6 @@ int main(int argc, char **argv, char **envp)
case QEMU_OPTION_chroot:
chroot_dir = optarg;
break;
case QEMU_OPTION_runas:
run_as = optarg;
break;
#endif
case QEMU_OPTION_xen_domid:
if (!(xen_available())) {
@ -3554,14 +3548,6 @@ int main(int argc, char **argv, char **envp)
exit(1);
}
if (run_as) {
pwd = getpwnam(run_as);
if (!pwd) {
fprintf(stderr, "User \"%s\" doesn't exist\n", run_as);
exit(1);
}
}
if (chroot_dir) {
if (chroot(chroot_dir) < 0) {
fprintf(stderr, "chroot failed\n");
@ -3573,20 +3559,7 @@ int main(int argc, char **argv, char **envp)
}
}
if (run_as) {
if (setgid(pwd->pw_gid) < 0) {
fprintf(stderr, "Failed to setgid(%d)\n", pwd->pw_gid);
exit(1);
}
if (setuid(pwd->pw_uid) < 0) {
fprintf(stderr, "Failed to setuid(%d)\n", pwd->pw_uid);
exit(1);
}
if (setuid(0) != -1) {
fprintf(stderr, "Dropping privileges failed\n");
exit(1);
}
}
os_change_process_uid();
if (daemonize) {
dup2(fd, 0);