vnc: tight: fix rgb_prepare_row

[qemu.git] / os-posix.c

diff --git a/os-posix.c b/os-posix.c
index 1672e0655038bcff69d8274762ef015b15e0cd18..00133a0c7658dd0efcbf9ee9561884662b2edb4b 100644 (file)
--- a/os-posix.c
+++ b/os-posix.c
@@ -28,6 +28,8 @@
 #include <signal.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+/*needed for MAP_POPULATE before including qemu-options.h */
+#include <sys/mman.h>
 #include <pwd.h>
 #include <libgen.h>
 
@@ -37,6 +39,10 @@
 #include "net/slirp.h"
 #include "qemu-options.h"
 
+#ifdef CONFIG_LINUX
+#include <sys/prctl.h>
+#endif
+
 static struct passwd *user_pwd;
 static const char *chroot_dir;
 static int daemonize;
@@ -139,6 +145,26 @@ char *os_find_datadir(const char *argv0)
 #undef SHARE_SUFFIX
 #undef BUILD_SUFFIX
 
+void os_set_proc_name(const char *s)
+{
+#if defined(PR_SET_NAME)
+    char name[16];
+    if (!s)
+        return;
+    name[sizeof(name) - 1] = 0;
+    strncpy(name, s, sizeof(name));
+    /* 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)) {
+        perror("unable to change process name");
+        exit(1);
+    }
+#else
+    fprintf(stderr, "Change of process name not supported by your OS\n");
+    exit(1);
+#endif
+}
+
 /*
  * Parse OS specific command line options.
  * return 0 if option handled, -1 otherwise
@@ -169,7 +195,7 @@ void os_parse_cmd_args(int index, const char *optarg)
     return;
 }
 
-void os_change_process_uid(void)
+static void change_process_uid(void)
 {
     if (user_pwd) {
         if (setgid(user_pwd->pw_gid) < 0) {
@@ -187,7 +213,7 @@ void os_change_process_uid(void)
     }
 }
 
-void os_change_root(void)
+static void change_root(void)
 {
     if (chroot_dir) {
         if (chroot(chroot_dir) < 0) {
@@ -276,8 +302,8 @@ void os_setup_post(void)
            exit(1);
     }
 
-    os_change_root();
-    os_change_process_uid();
+    change_root();
+    change_process_uid();
 
     if (daemonize) {
         dup2(fd, 0);
@@ -298,3 +324,8 @@ void os_pidfile_error(void)
     } else
         fprintf(stderr, "Could not acquire pid file: %s\n", strerror(errno));
 }
+
+void os_set_line_buffering(void)
+{
+    setvbuf(stdout, NULL, _IOLBF, 0);
+}