diff options
Diffstat (limited to 'os-posix.c')
| -rw-r--r-- | os-posix.c | 157 |
1 files changed, 46 insertions, 111 deletions
diff --git a/os-posix.c b/os-posix.c index cfcb96533c..f90dfda9b0 100644 --- a/os-posix.c +++ b/os-posix.c @@ -29,33 +29,15 @@ #include <grp.h> #include <libgen.h> -/* Needed early for CONFIG_BSD etc. */ -#include "net/slirp.h" -#include "qemu/qemu-options.h" #include "qemu/error-report.h" #include "qemu/log.h" #include "sysemu/runstate.h" #include "qemu/cutils.h" -#include "qemu/config-file.h" -#include "qemu/option.h" -#include "qemu/module.h" #ifdef CONFIG_LINUX #include <sys/prctl.h> -#include "qemu/async-teardown.h" #endif -/* - * Must set all three of these at once. - * Legal combinations are unset by name by uid - */ -static struct passwd *user_pwd; /* NULL non-NULL NULL */ -static uid_t user_uid = (uid_t)-1; /* -1 -1 >=0 */ -static gid_t user_gid = (gid_t)-1; /* -1 -1 >=0 */ - -static const char *chroot_dir; -static int daemonize; -static int daemon_pipe; void os_setup_early_signal_handling(void) { @@ -103,7 +85,22 @@ void os_set_proc_name(const char *s) } -static bool os_parse_runas_uid_gid(const char *optarg) +/* + * Must set all three of these at once. + * Legal combinations are unset by name by uid + */ +static struct passwd *user_pwd; /* NULL non-NULL NULL */ +static uid_t user_uid = (uid_t)-1; /* -1 -1 >=0 */ +static gid_t user_gid = (gid_t)-1; /* -1 -1 >=0 */ + +/* + * Prepare to change user ID. optarg can be one of 3 forms: + * - a username, in which case user ID will be changed to its uid, + * with primary and supplementary groups set up too; + * - a numeric uid, in which case only the uid will be set; + * - a pair of numeric uid:gid. + */ +bool os_set_runas(const char *optarg) { unsigned long lv; const char *ep; @@ -111,6 +108,13 @@ static bool os_parse_runas_uid_gid(const char *optarg) gid_t got_gid; int rc; + user_pwd = getpwnam(optarg); + if (user_pwd) { + user_uid = -1; + user_gid = -1; + return true; + } + rc = qemu_strtoul(optarg, &ep, 0, &lv); got_uid = lv; /* overflow here is ID in C99 */ if (rc || *ep != ':' || got_uid != lv || got_uid == (uid_t)-1) { @@ -129,63 +133,6 @@ static bool os_parse_runas_uid_gid(const char *optarg) return true; } -/* - * Parse OS specific command line options. - * return 0 if option handled, -1 otherwise - */ -int os_parse_cmd_args(int index, const char *optarg) -{ - switch (index) { - case QEMU_OPTION_runas: - user_pwd = getpwnam(optarg); - if (user_pwd) { - user_uid = -1; - user_gid = -1; - } else if (!os_parse_runas_uid_gid(optarg)) { - error_report("User \"%s\" doesn't exist" - " (and is not <uid>:<gid>)", - optarg); - exit(1); - } - break; - case QEMU_OPTION_chroot: - warn_report("option is deprecated, use '-run-with chroot=...' instead"); - chroot_dir = optarg; - break; - case QEMU_OPTION_daemonize: - daemonize = 1; - break; -#if defined(CONFIG_LINUX) - /* deprecated */ - case QEMU_OPTION_asyncteardown: - init_async_teardown(); - break; -#endif - case QEMU_OPTION_run_with: { - const char *str; - QemuOpts *opts = qemu_opts_parse_noisily(qemu_find_opts("run-with"), - optarg, false); - if (!opts) { - exit(1); - } -#if defined(CONFIG_LINUX) - if (qemu_opt_get_bool(opts, "async-teardown", false)) { - init_async_teardown(); - } -#endif - str = qemu_opt_get(opts, "chroot"); - if (str) { - chroot_dir = str; - } - break; - } - default: - return -1; - } - - return 0; -} - static void change_process_uid(void) { assert((user_uid == (uid_t)-1) || user_pwd == NULL); @@ -223,6 +170,14 @@ static void change_process_uid(void) } } + +static const char *chroot_dir; + +void os_set_chroot(const char *optarg) +{ + chroot_dir = optarg; +} + static void change_root(void) { if (chroot_dir) { @@ -238,6 +193,21 @@ static void change_root(void) } + +static int daemonize; +static int daemon_pipe; + +bool is_daemonized(void) +{ + return daemonize; +} + +int os_set_daemonize(bool d) +{ + daemonize = d; + return 0; +} + void os_daemonize(void) { if (daemonize) { @@ -331,17 +301,6 @@ void os_set_line_buffering(void) setvbuf(stdout, NULL, _IOLBF, 0); } -bool is_daemonized(void) -{ - return daemonize; -} - -int os_set_daemonize(bool d) -{ - daemonize = d; - return 0; -} - int os_mlock(void) { #ifdef HAVE_MLOCKALL @@ -357,27 +316,3 @@ int os_mlock(void) return -ENOSYS; #endif } - -static QemuOptsList qemu_run_with_opts = { - .name = "run-with", - .head = QTAILQ_HEAD_INITIALIZER(qemu_run_with_opts.head), - .desc = { -#if defined(CONFIG_LINUX) - { - .name = "async-teardown", - .type = QEMU_OPT_BOOL, - }, -#endif - { - .name = "chroot", - .type = QEMU_OPT_STRING, - }, - { /* end of list */ } - }, -}; - -static void register_runwith(void) -{ - qemu_add_opts(&qemu_run_with_opts); -} -opts_init(register_runwith); |