#include <grp.h>
#include <libgen.h>
-#include "qemu-common.h"
-/* Needed early for CONFIG_BSD etc. */
-#include "net/slirp.h"
-#include "qemu-options.h"
#include "qemu/error-report.h"
#include "qemu/log.h"
#include "sysemu/runstate.h"
#include <sys/prctl.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)
{
sigaction(SIGTERM, &act, NULL);
}
-/*
- * Find a likely location for support files using the location of the binary.
- * When running from the build tree this will be "$bindir/pc-bios".
- * Otherwise, this is CONFIG_QEMU_DATADIR.
- *
- * The caller must use g_free() to free the returned data when it is
- * no longer required.
- */
-char *os_find_datadir(void)
-{
- g_autofree char *exec_dir = NULL;
- g_autofree char *dir = NULL;
-
- exec_dir = qemu_get_exec_dir();
- g_return_val_if_fail(exec_dir != NULL, NULL);
-
- dir = g_build_filename(exec_dir, "pc-bios", NULL);
- if (g_file_test(dir, G_FILE_TEST_IS_DIR)) {
- return g_steal_pointer(&dir);
- }
-
- return g_strdup(CONFIG_QEMU_DATADIR);
-}
-
void os_set_proc_name(const char *s)
{
#if defined(PR_SET_NAME)
}
-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. user_id 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 *user_id)
{
unsigned long lv;
const char *ep;
gid_t got_gid;
int rc;
- rc = qemu_strtoul(optarg, &ep, 0, &lv);
+ user_pwd = getpwnam(user_id);
+ if (user_pwd) {
+ user_uid = -1;
+ user_gid = -1;
+ return true;
+ }
+
+ rc = qemu_strtoul(user_id, &ep, 0, &lv);
got_uid = lv; /* overflow here is ID in C99 */
if (rc || *ep != ':' || got_uid != lv || got_uid == (uid_t)-1) {
return false;
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:
- chroot_dir = optarg;
- break;
- case QEMU_OPTION_daemonize:
- daemonize = 1;
- break;
-#if defined(CONFIG_LINUX)
- case QEMU_OPTION_enablefips:
- fips_set_state(true);
- break;
-#endif
- default:
- return -1;
- }
-
- return 0;
-}
-
static void change_process_uid(void)
{
assert((user_uid == (uid_t)-1) || user_pwd == NULL);
}
}
+
+static const char *chroot_dir;
+
+void os_set_chroot(const char *path)
+{
+ chroot_dir = path;
+}
+
static void change_root(void)
{
if (chroot_dir) {
}
+
+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) {
pid_t pid;
int fds[2];
- if (pipe(fds) == -1) {
+ if (!g_unix_open_pipe(fds, FD_CLOEXEC, NULL)) {
exit(1);
}
close(fds[0]);
daemon_pipe = fds[1];
- qemu_set_cloexec(daemon_pipe);
setsid();
error_report("not able to chdir to /: %s", strerror(errno));
exit(1);
}
- TFR(fd = qemu_open("/dev/null", O_RDWR));
+ fd = RETRY_ON_EINTR(qemu_open_old("/dev/null", O_RDWR));
if (fd == -1) {
exit(1);
}
dup2(fd, 0);
dup2(fd, 1);
/* In case -D is given do not redirect stderr to /dev/null */
- if (!qemu_logfile) {
+ if (!qemu_log_enabled()) {
dup2(fd, 2);
}
setvbuf(stdout, NULL, _IOLBF, 0);
}
-bool is_daemonized(void)
-{
- return daemonize;
-}
-
int os_mlock(void)
{
#ifdef HAVE_MLOCKALL
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