* THE SOFTWARE.
*/
-#include <unistd.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <sys/types.h>
+#include "qemu/osdep.h"
#include <sys/wait.h>
/*needed for MAP_POPULATE before including qemu-options.h */
-#include <sys/mman.h>
#include <pwd.h>
#include <grp.h>
#include <libgen.h>
/* Needed early for CONFIG_BSD etc. */
-#include "config-host.h"
-#include "sysemu.h"
+#include "sysemu/sysemu.h"
#include "net/slirp.h"
#include "qemu-options.h"
+#include "qemu/rcu.h"
+#include "qemu/error-report.h"
+#include "qemu/log.h"
+#include "qemu/cutils.h"
#ifdef CONFIG_LINUX
#include <sys/prctl.h>
#endif
-#ifdef __FreeBSD__
-#include <sys/sysctl.h>
-#endif
-
static struct passwd *user_pwd;
static const char *chroot_dir;
static int daemonize;
-static int fds[2];
+static int daemon_pipe;
void os_setup_early_signal_handling(void)
{
running from the build tree this will be "$bindir/../pc-bios". */
#define SHARE_SUFFIX "/share/qemu"
#define BUILD_SUFFIX "/pc-bios"
-char *os_find_datadir(const char *argv0)
+char *os_find_datadir(void)
{
- char *dir;
- char *p = NULL;
+ char *dir, *exec_dir;
char *res;
- char buf[PATH_MAX];
size_t max_len;
-#if defined(__linux__)
- {
- int len;
- len = readlink("/proc/self/exe", buf, sizeof(buf) - 1);
- if (len > 0) {
- buf[len] = 0;
- p = buf;
- }
- }
-#elif defined(__FreeBSD__)
- {
- static int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};
- size_t len = sizeof(buf) - 1;
-
- *buf = '\0';
- if (!sysctl(mib, ARRAY_SIZE(mib), buf, &len, NULL, 0) &&
- *buf) {
- buf[sizeof(buf) - 1] = '\0';
- p = buf;
- }
+ exec_dir = qemu_get_exec_dir();
+ if (exec_dir == NULL) {
+ return NULL;
}
-#endif
- /* If we don't have any way of figuring out the actual executable
- location then try argv[0]. */
- if (!p) {
- p = realpath(argv0, buf);
- if (!p) {
- return NULL;
- }
- }
- dir = dirname(p);
- dir = dirname(dir);
+ dir = g_path_get_dirname(exec_dir);
max_len = strlen(dir) +
MAX(strlen(SHARE_SUFFIX), strlen(BUILD_SUFFIX)) + 1;
}
}
+ g_free(dir);
+ g_free(exec_dir);
return res;
}
#undef SHARE_SUFFIX
char name[16];
if (!s)
return;
- name[sizeof(name) - 1] = 0;
- strncpy(name, s, sizeof(name));
+ pstrcpy(name, sizeof(name), s);
/* Could rewrite argv[0] too, but that's a bit more complicated.
This simple way is enough for `top'. */
if (prctl(PR_SET_NAME, name)) {
switch (index) {
#ifdef CONFIG_SLIRP
case QEMU_OPTION_smb:
+ error_report("The -smb option is deprecated. "
+ "Please use '-netdev user,smb=...' instead.");
if (net_slirp_smb(optarg) < 0)
exit(1);
break;
break;
#endif
}
- return;
}
static void change_process_uid(void)
void os_daemonize(void)
{
if (daemonize) {
- pid_t pid;
-
- if (pipe(fds) == -1)
- exit(1);
-
- pid = fork();
- if (pid > 0) {
- uint8_t status;
- ssize_t len;
-
- close(fds[1]);
-
- again:
- len = read(fds[0], &status, 1);
- if (len == -1 && (errno == EINTR))
- goto again;
-
- if (len != 1)
- exit(1);
- else if (status == 1) {
- fprintf(stderr, "Could not acquire pidfile: %s\n", strerror(errno));
- exit(1);
- } else
- exit(0);
- } else if (pid < 0)
+ pid_t pid;
+ int fds[2];
+
+ if (pipe(fds) == -1) {
exit(1);
+ }
- close(fds[0]);
- qemu_set_cloexec(fds[1]);
+ pid = fork();
+ if (pid > 0) {
+ uint8_t status;
+ ssize_t len;
- setsid();
+ close(fds[1]);
- pid = fork();
- if (pid > 0)
- exit(0);
- else if (pid < 0)
- exit(1);
+ do {
+ len = read(fds[0], &status, 1);
+ } while (len < 0 && errno == EINTR);
- umask(027);
+ /* only exit successfully if our child actually wrote
+ * a one-byte zero to our pipe, upon successful init */
+ exit(len == 1 && status == 0 ? 0 : 1);
+
+ } else if (pid < 0) {
+ exit(1);
+ }
+
+ close(fds[0]);
+ daemon_pipe = fds[1];
+ qemu_set_cloexec(daemon_pipe);
+
+ setsid();
+
+ pid = fork();
+ if (pid > 0) {
+ exit(0);
+ } else if (pid < 0) {
+ exit(1);
+ }
+ umask(027);
signal(SIGTSTP, SIG_IGN);
signal(SIGTTOU, SIG_IGN);
signal(SIGTTIN, SIG_IGN);
+ rcu_after_fork();
}
}
int fd = 0;
if (daemonize) {
- uint8_t status = 0;
- ssize_t len;
-
- again1:
- len = write(fds[1], &status, 1);
- if (len == -1 && (errno == EINTR))
- goto again1;
-
- if (len != 1)
- exit(1);
-
if (chdir("/")) {
perror("not able to chdir to /");
exit(1);
}
- TFR(fd = qemu_open("/dev/null", O_RDWR));
- if (fd == -1)
- exit(1);
+ TFR(fd = qemu_open("/dev/null", O_RDWR));
+ if (fd == -1) {
+ exit(1);
+ }
}
change_root();
change_process_uid();
if (daemonize) {
+ uint8_t status = 0;
+ ssize_t len;
+
dup2(fd, 0);
dup2(fd, 1);
- dup2(fd, 2);
+ /* In case -D is given do not redirect stderr to /dev/null */
+ if (!qemu_logfile) {
+ dup2(fd, 2);
+ }
close(fd);
- }
-}
-void os_pidfile_error(void)
-{
- if (daemonize) {
- uint8_t status = 1;
- if (write(fds[1], &status, 1) != 1) {
- perror("daemonize. Writing to pipe\n");
+ do {
+ len = write(daemon_pipe, &status, 1);
+ } while (len < 0 && errno == EINTR);
+ if (len != 1) {
+ exit(1);
}
- } else
- fprintf(stderr, "Could not acquire pid file: %s\n", strerror(errno));
+ }
}
void os_set_line_buffering(void)
{
return daemonize;
}
+
+int os_mlock(void)
+{
+ int ret = 0;
+
+ ret = mlockall(MCL_CURRENT | MCL_FUTURE);
+ if (ret < 0) {
+ perror("mlockall");
+ }
+
+ return ret;
+}
projects / mirror_qemu.git / blobdiff