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b6aad04900
1. Detecting the split /dev/ttyv0 / /dev/console case, e.g. you've booted with the -h flag and you have a VGA card also. 2. Adding an extra "menu" for selecting terminal type and adding ANSI to the list of compiled-in terms. 3. Opening the proper file descriptors before disowning ourselves. Requested by: pst
377 lines
8.4 KiB
C
377 lines
8.4 KiB
C
/*
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* The new sysinstall program.
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*
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* This is probably the last program in the `sysinstall' line - the next
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* generation being essentially a complete rewrite.
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*
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* $Id: system.c,v 1.81 1997/05/27 18:56:03 jkh Exp $
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*
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* Jordan Hubbard
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*
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* My contributions are in the public domain.
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*
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* Parts of this file are also blatently stolen from Poul-Henning Kamp's
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* previous version of sysinstall, and as such fall under his "BEERWARE license"
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* so buy him a beer if you like it! Buy him a beer for me, too!
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* Heck, get him completely drunk and send me pictures! :-)
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*/
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#include "sysinstall.h"
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#include <signal.h>
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#include <sys/reboot.h>
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#include <machine/console.h>
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#include <sys/fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/wait.h>
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/* Where we stick our temporary expanded doc file */
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#define DOC_TMP_DIR "/tmp"
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#define DOC_TMP_FILE "/tmp/doc.tmp"
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static pid_t ehs_pid;
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/*
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* Handle interrupt signals - this probably won't work in all cases
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* due to our having bogotified the internal state of dialog or curses,
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* but we'll give it a try.
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*/
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static void
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handle_intr(int sig)
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{
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WINDOW *save = savescr();
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if (!msgYesNo("Are you sure you want to abort the installation?"))
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systemShutdown(-1);
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else
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restorescr(save);
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}
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/* Expand a file into a convenient location, nuking it each time */
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static char *
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expand(char *fname)
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{
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Mkdir(DOC_TMP_DIR);
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unlink(DOC_TMP_FILE);
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if (!file_readable(fname) || vsystem("gzip -c -d %s > %s", fname, DOC_TMP_FILE))
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return NULL;
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return DOC_TMP_FILE;
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}
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/* Initialize system defaults */
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void
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systemInitialize(int argc, char **argv)
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{
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int i;
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signal(SIGINT, SIG_IGN);
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globalsInit();
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/* Are we running as init? */
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if (getpid() == 1) {
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int fd, type;
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RunningAsInit = 1;
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setsid();
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close(0);
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fd = open("/dev/ttyv0", O_RDWR);
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if (fd == -1)
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fd = open("/dev/console", O_RDWR); /* fallback */
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else
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OnVTY = TRUE;
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/*
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* To make _sure_ we're on a VTY and don't have /dev/console switched
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* away to a serial port or something, attempt to set the cursor appearance.
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*/
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type = 0; /* normal */
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if (OnVTY) {
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int fd2;
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if ((fd2 = open("/dev/console", O_RDWR)) != -1) {
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if (ioctl(fd2, CONS_CURSORTYPE, &type) == -1) {
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OnVTY = FALSE;
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close(fd); close(fd2);
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open("/dev/console", O_RDWR);
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}
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else
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close(fd2);
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}
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}
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close(1); dup(0);
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close(2); dup(0);
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printf("%s running as init on %s\n", argv[0], OnVTY ? "vty0" : "serial console");
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i = ioctl(0, TIOCSCTTY, (char *)NULL);
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setlogin("root");
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setenv("PATH", "/stand:/bin:/sbin:/usr/sbin:/usr/bin:/mnt/bin:/mnt/sbin:/mnt/usr/sbin:/mnt/usr/bin:/usr/X11R6/bin", 1);
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setbuf(stdin, 0);
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setbuf(stderr, 0);
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}
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else {
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char hname[256];
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/* Initalize various things for a multi-user environment */
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if (!gethostname(hname, sizeof hname))
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variable_set2(VAR_HOSTNAME, hname);
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}
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if (set_termcap() == -1) {
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printf("Can't find terminal entry\n");
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exit(-1);
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}
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/* XXX - libdialog has particularly bad return value checking */
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init_dialog();
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/* If we haven't crashed I guess dialog is running ! */
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DialogActive = TRUE;
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/* Make sure HOME is set for those utilities that need it */
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if (!getenv("HOME"))
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setenv("HOME", "/", 1);
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signal(SIGINT, handle_intr);
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}
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/* Close down and prepare to exit */
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void
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systemShutdown(int status)
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{
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/* If some media is open, close it down */
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if (status >=0 && mediaDevice)
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mediaDevice->shutdown(mediaDevice);
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/* write out any changes to rc.conf .. */
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configRC_conf("/etc/rc.conf");
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/* Shut down the dialog library */
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if (DialogActive) {
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end_dialog();
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DialogActive = FALSE;
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}
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/* Shut down curses */
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endwin();
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/* If we have a temporary doc file lying around, nuke it */
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unlink(DOC_TMP_FILE);
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/* REALLY exit! */
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if (RunningAsInit) {
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/* Put the console back */
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ioctl(0, VT_ACTIVATE, 2);
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reboot(0);
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}
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else
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exit(status);
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}
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/* Run some general command */
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int
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systemExecute(char *command)
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{
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int status;
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struct termios foo;
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dialog_update();
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end_dialog();
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DialogActive = FALSE;
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if (tcgetattr(0, &foo) != -1) {
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foo.c_cc[VERASE] = '\010';
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tcsetattr(0, TCSANOW, &foo);
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}
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if (!Fake)
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status = system(command);
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else {
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status = 0;
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msgDebug("systemExecute: Faked execution of `%s'\n", command);
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}
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DialogActive = TRUE;
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return status;
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}
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/* Display a help file in a filebox */
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int
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systemDisplayHelp(char *file)
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{
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char *fname = NULL;
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char buf[FILENAME_MAX];
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int ret = 0;
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fname = systemHelpFile(file, buf);
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if (!fname) {
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snprintf(buf, FILENAME_MAX, "The %s file is not provided on this particular floppy image.", file);
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use_helpfile(NULL);
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use_helpline(NULL);
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dialog_mesgbox("Sorry!", buf, -1, -1);
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ret = 1;
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}
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else {
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use_helpfile(NULL);
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use_helpline(NULL);
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dialog_textbox(file, fname, LINES, COLS);
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}
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return ret;
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}
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char *
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systemHelpFile(char *file, char *buf)
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{
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if (!file)
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return NULL;
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snprintf(buf, FILENAME_MAX, "/stand/help/%s.hlp.gz", file);
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if (file_readable(buf))
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return expand(buf);
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snprintf(buf, FILENAME_MAX, "/usr/src/release/sysinstall/help/%s.hlp", file);
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if (file_readable(buf))
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return buf;
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return NULL;
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}
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void
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systemChangeTerminal(char *color, const u_char c_term[],
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char *mono, const u_char m_term[])
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{
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extern void init_acs(void);
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if (OnVTY) {
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if (ColorDisplay) {
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setenv("TERM", color, 1);
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setenv("TERMCAP", c_term, 1);
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reset_shell_mode();
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setterm(color);
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init_acs();
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cbreak(); noecho();
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}
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else {
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setenv("TERM", mono, 1);
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setenv("TERMCAP", m_term, 1);
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reset_shell_mode();
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setterm(mono);
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init_acs();
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cbreak(); noecho();
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}
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}
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clear();
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refresh();
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dialog_clear();
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}
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int
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vsystem(char *fmt, ...)
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{
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va_list args;
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int pstat;
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pid_t pid;
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int omask;
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sig_t intsave, quitsave;
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char *cmd;
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int i;
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cmd = (char *)alloca(FILENAME_MAX);
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cmd[0] = '\0';
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va_start(args, fmt);
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vsnprintf(cmd, FILENAME_MAX, fmt, args);
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va_end(args);
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omask = sigblock(sigmask(SIGCHLD));
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if (Fake) {
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msgDebug("vsystem: Faked execution of `%s'\n", cmd);
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return 0;
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}
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if (isDebug())
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msgDebug("Executing command `%s'\n", cmd);
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pid = fork();
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if (pid == -1) {
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(void)sigsetmask(omask);
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i = 127;
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}
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else if (!pid) { /* Junior */
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(void)sigsetmask(omask);
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if (DebugFD != -1) {
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dup2(DebugFD, 0);
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dup2(DebugFD, 1);
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dup2(DebugFD, 2);
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}
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else {
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close(1); open("/dev/null", O_WRONLY);
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dup2(1, 2);
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}
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if (!RunningAsInit)
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execl("/bin/sh", "/bin/sh", "-c", cmd, (char *)NULL);
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else
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execl("/stand/sh", "/stand/sh", "-c", cmd, (char *)NULL);
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exit(1);
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}
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else {
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intsave = signal(SIGINT, SIG_IGN);
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quitsave = signal(SIGQUIT, SIG_IGN);
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pid = waitpid(pid, &pstat, 0);
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(void)sigsetmask(omask);
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(void)signal(SIGINT, intsave);
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(void)signal(SIGQUIT, quitsave);
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i = (pid == -1) ? -1 : WEXITSTATUS(pstat);
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if (isDebug())
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msgDebug("Command `%s' returns status of %d\n", cmd, i);
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}
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return i;
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}
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void
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systemCreateHoloshell(void)
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{
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if (OnVTY && RunningAsInit) {
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if (ehs_pid != 0) {
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int pstat;
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if (kill(ehs_pid, 0) == 0) {
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if (msgYesNo("There seems to be an emergency holographic shell\n"
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"already running von VTY 4.\n"
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"Kill it and start a new one?"))
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return;
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/* try cleaning up as much as possible */
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(void) kill(ehs_pid, SIGHUP);
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sleep(1);
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(void) kill(ehs_pid, SIGKILL);
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}
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/* avoid too many zombies */
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(void) waitpid(ehs_pid, &pstat, WNOHANG);
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}
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if ((ehs_pid = fork()) == 0) {
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int i, fd;
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struct termios foo;
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extern int login_tty(int);
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ioctl(0, TIOCNOTTY, NULL);
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for (i = getdtablesize(); i >= 0; --i)
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close(i);
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fd = open("/dev/ttyv3", O_RDWR);
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ioctl(0, TIOCSCTTY, &fd);
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dup2(0, 1);
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dup2(0, 2);
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DebugFD = 2;
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if (login_tty(fd) == -1)
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msgDebug("Doctor: I can't set the controlling terminal.\n");
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signal(SIGTTOU, SIG_IGN);
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if (tcgetattr(fd, &foo) != -1) {
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foo.c_cc[VERASE] = '\010';
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if (tcsetattr(fd, TCSANOW, &foo) == -1)
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msgDebug("Doctor: I'm unable to set the erase character.\n");
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}
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else
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msgDebug("Doctor: I'm unable to get the terminal attributes!\n");
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execlp("sh", "-sh", 0);
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msgDebug("Was unable to execute sh for Holographic shell!\n");
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exit(1);
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}
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else {
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msgNotify("Starting an emergency holographic shell on VTY4");
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sleep(2);
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}
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}
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}
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