Throw out the obsolete INIT_CHROOT junk
This commit is contained in:
Eric Andersen
parent
28a78ab62c
commit
f6a7227fd6
91
init.c
91
init.c
@ -660,94 +660,6 @@ static void reboot_signal(int sig)
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exit(0);
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}
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#if defined BB_FEATURE_INIT_CHROOT
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#warning BB_FEATURE_INIT_CHROOT is out of date and should be rewritten to us
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#warning pivot root instead. Do not even bother till this work is done...
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#warning You have been warned.
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static void check_chroot(int sig)
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{
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char *argv_init[2] = { "init", NULL, };
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char *envp_init[3] = { "HOME=/", "TERM=linux", NULL, };
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char rootpath[256], *tc;
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int fd;
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if ((fd = open("/proc/sys/kernel/init-chroot", O_RDONLY)) == -1) {
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message(CONSOLE,
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"SIGHUP recived, but could not open proc file\r\n");
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sleep(2);
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return;
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}
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if (read(fd, rootpath, sizeof(rootpath)) == -1) {
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message(CONSOLE,
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"SIGHUP recived, but could not read proc file\r\n");
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sleep(2);
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return;
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}
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close(fd);
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if (rootpath[0] == '\0') {
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message(CONSOLE,
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"SIGHUP recived, but new root is not valid: %s\r\n",
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rootpath);
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sleep(2);
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return;
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}
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tc = strrchr(rootpath, '\n');
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*tc = '\0';
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/* Ok, making it this far means we commit */
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message(CONSOLE, "Please stand by, changing root to `%s'.\r\n",
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rootpath);
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/* kill all other programs first */
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message(CONSOLE, "Sending SIGTERM to all processes.\r\n");
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kill(-1, SIGTERM);
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sleep(2);
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sync();
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message(CONSOLE, "Sending SIGKILL to all processes.\r\n");
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kill(-1, SIGKILL);
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sleep(2);
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sync();
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/* ok, we don't need /proc anymore. we also assume that the signaling
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* process left the rest of the filesystems alone for us */
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umount("/proc");
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/* Ok, now we chroot. Hopefully we only have two things mounted, the
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* new chroot'd mount point, and the old "/" mount. s,
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* we go ahead and unmount the old "/". This should trigger the kernel
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* to set things up the Right Way(tm). */
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if (!chroot(rootpath))
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umount("/dev/root");
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/* If the chroot fails, we are already too far to turn back, so we
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* continue and hope that executing init below will revive the system */
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/* close all of our descriptors and open new ones */
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close(0);
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close(1);
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close(2);
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open("/dev/console", O_RDWR, 0);
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dup(0);
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dup(0);
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message(CONSOLE, "Executing real init...\r\n");
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/* execute init in the (hopefully) new root */
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execve("/sbin/init", argv_init, envp_init);
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message(CONSOLE,
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"ERROR: Could not exec new init. Press %s to reboot.\r\n",
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(secondConsole == NULL) /* serial console */
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? "Reset" : "CTRL-ALT-DEL");
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return;
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}
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#endif /* BB_FEATURE_INIT_CHROOT */
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#endif /* ! DEBUG_INIT */
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void new_initAction(initActionEnum action, char *process, char *cons)
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@ -945,9 +857,6 @@ extern int init_main(int argc, char **argv)
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signal(SIGUSR2, halt_signal);
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signal(SIGINT, reboot_signal);
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signal(SIGTERM, reboot_signal);
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#if defined BB_FEATURE_INIT_CHROOT
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signal(SIGHUP, check_chroot);
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#endif
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/* Turn off rebooting via CTL-ALT-DEL -- we get a
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* SIGINT on CAD so we can shut things down gracefully... */
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91
init/init.c
91
init/init.c
@ -660,94 +660,6 @@ static void reboot_signal(int sig)
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exit(0);
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}
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#if defined BB_FEATURE_INIT_CHROOT
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#warning BB_FEATURE_INIT_CHROOT is out of date and should be rewritten to us
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#warning pivot root instead. Do not even bother till this work is done...
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#warning You have been warned.
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static void check_chroot(int sig)
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{
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char *argv_init[2] = { "init", NULL, };
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char *envp_init[3] = { "HOME=/", "TERM=linux", NULL, };
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char rootpath[256], *tc;
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int fd;
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if ((fd = open("/proc/sys/kernel/init-chroot", O_RDONLY)) == -1) {
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message(CONSOLE,
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"SIGHUP recived, but could not open proc file\r\n");
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sleep(2);
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return;
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}
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if (read(fd, rootpath, sizeof(rootpath)) == -1) {
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message(CONSOLE,
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"SIGHUP recived, but could not read proc file\r\n");
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sleep(2);
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return;
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}
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close(fd);
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if (rootpath[0] == '\0') {
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message(CONSOLE,
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"SIGHUP recived, but new root is not valid: %s\r\n",
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rootpath);
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sleep(2);
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return;
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}
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tc = strrchr(rootpath, '\n');
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*tc = '\0';
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/* Ok, making it this far means we commit */
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message(CONSOLE, "Please stand by, changing root to `%s'.\r\n",
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rootpath);
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/* kill all other programs first */
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message(CONSOLE, "Sending SIGTERM to all processes.\r\n");
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kill(-1, SIGTERM);
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sleep(2);
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sync();
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message(CONSOLE, "Sending SIGKILL to all processes.\r\n");
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kill(-1, SIGKILL);
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sleep(2);
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sync();
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/* ok, we don't need /proc anymore. we also assume that the signaling
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* process left the rest of the filesystems alone for us */
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umount("/proc");
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/* Ok, now we chroot. Hopefully we only have two things mounted, the
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* new chroot'd mount point, and the old "/" mount. s,
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* we go ahead and unmount the old "/". This should trigger the kernel
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* to set things up the Right Way(tm). */
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if (!chroot(rootpath))
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umount("/dev/root");
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/* If the chroot fails, we are already too far to turn back, so we
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* continue and hope that executing init below will revive the system */
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/* close all of our descriptors and open new ones */
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close(0);
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close(1);
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close(2);
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open("/dev/console", O_RDWR, 0);
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dup(0);
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dup(0);
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message(CONSOLE, "Executing real init...\r\n");
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/* execute init in the (hopefully) new root */
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execve("/sbin/init", argv_init, envp_init);
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message(CONSOLE,
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"ERROR: Could not exec new init. Press %s to reboot.\r\n",
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(secondConsole == NULL) /* serial console */
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? "Reset" : "CTRL-ALT-DEL");
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return;
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}
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#endif /* BB_FEATURE_INIT_CHROOT */
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#endif /* ! DEBUG_INIT */
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void new_initAction(initActionEnum action, char *process, char *cons)
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@ -945,9 +857,6 @@ extern int init_main(int argc, char **argv)
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signal(SIGUSR2, halt_signal);
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signal(SIGINT, reboot_signal);
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signal(SIGTERM, reboot_signal);
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#if defined BB_FEATURE_INIT_CHROOT
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signal(SIGHUP, check_chroot);
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#endif
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/* Turn off rebooting via CTL-ALT-DEL -- we get a
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* SIGINT on CAD so we can shut things down gracefully... */
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