From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=59616 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OKDax-0002hV-Ji for qemu-devel@nongnu.org; Thu, 03 Jun 2010 12:48:41 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OKDaw-00068U-9f for qemu-devel@nongnu.org; Thu, 03 Jun 2010 12:48:39 -0400 Received: from mx1.redhat.com ([209.132.183.28]:1473) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OKDav-00068I-VW for qemu-devel@nongnu.org; Thu, 03 Jun 2010 12:48:38 -0400 From: Jes.Sorensen@redhat.com Date: Thu, 3 Jun 2010 18:48:07 +0200 Message-Id: <1275583692-11678-12-git-send-email-Jes.Sorensen@redhat.com> In-Reply-To: <1275583692-11678-1-git-send-email-Jes.Sorensen@redhat.com> References: <1275583692-11678-1-git-send-email-Jes.Sorensen@redhat.com> Subject: [Qemu-devel] [PATCH 11/16] Move runas handling from vl.c to OS specific files. List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: anthony@codemonkey.ws Cc: Jes Sorensen , qemu-devel@nongnu.org From: Jes Sorensen 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 --- os-posix.c | 28 ++++++++++++++++++++++++++++ qemu-os-posix.h | 1 + qemu-os-win32.h | 1 + vl.c | 29 +---------------------------- 4 files changed, 31 insertions(+), 28 deletions(-) diff --git a/os-posix.c b/os-posix.c index 66f2bf5..f8a092e 100644 --- a/os-posix.c +++ b/os-posix.c @@ -28,6 +28,7 @@ #include #include #include +#include #include /* Needed early for CONFIG_BSD etc. */ @@ -35,6 +36,8 @@ #include "sysemu.h" #include "net/slirp.h" +static struct passwd *user_pwd; + void os_setup_early_signal_handling(void) { struct sigaction act; @@ -159,8 +162,33 @@ int os_parse_cmd_args(const QEMUOption *popt, 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; default: ret = -1; } return ret; } + +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); + } + } +} diff --git a/qemu-os-posix.h b/qemu-os-posix.h index ff5adb1..6d8cf79 100644 --- a/qemu-os-posix.h +++ b/qemu-os-posix.h @@ -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 diff --git a/qemu-os-win32.h b/qemu-os-win32.h index 4343c6d..9df0eda 100644 --- a/qemu-os-win32.h +++ b/qemu-os-win32.h @@ -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 diff --git a/vl.c b/vl.c index 838e109..d42be8d 100644 --- a/vl.c +++ b/vl.c @@ -34,7 +34,6 @@ #ifndef _WIN32 #include -#include #include #include #include @@ -2312,9 +2311,7 @@ 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; @@ -3062,9 +3059,6 @@ 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); -- 1.6.5.2