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/* ??? |
/* /sbin/init for Nova. |
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Copyright 2002 Johan Rydberg, jrydberg@rtmk.org. |
Copyright 2002 Johan Rydberg, jrydberg@rtmk.org. |
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This program is free software; you can redistribute it and/or modify |
This program is free software; you can redistribute it and/or modify |
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along with this program; if not, write to the Free Software |
along with this program; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
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#include <sys/utsname.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <argp.h> |
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#include <error.h> |
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#undef VERSION |
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#define VERSION "0.0" |
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/* If we should boot the system in single-user mode. */ |
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int single_user_p = 0; |
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/* If we should initialize the system. */ |
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int init_system_p = 0; |
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/* Runlevel that we should start at. */ |
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int initial_runlevel = -1; |
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const char *argp_program_version = "0.0"; |
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const char *argp_program_bug_address = "nova-discuss@mail.freesoftware.fsf.org"; |
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static struct argp_option options[] = |
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{ |
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{"single-user", 's', 0, 0, "Startup system in single-user mode"}, |
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{"initialize-system", 'i', 0, 0, "Initialize system"}, |
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{0} |
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}; |
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static char doc[] = "Process control initialization"; |
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static int |
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parse_opt (int key, char *arg, struct argp_state *state) |
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{ |
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switch (key) |
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{ |
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case ARGP_KEY_ARG: initial_runlevel = atoi (arg); break; |
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case 's': single_user_p = 1; break; |
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case 'i': init_system_p = 1; break; |
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default: return ARGP_ERR_UNKNOWN; |
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} |
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return 0; |
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} |
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/* Singel-user shell locations. */ |
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char *shell_paths [] = { "/bin/sh", "/bin/rc", 0 }; |
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int |
int |
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main (void) |
main (int argc, char **argv) |
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{ |
{ |
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struct argp argp = { options, parse_opt, 0, doc }; |
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struct utsname utsname; |
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int err, pid, i; |
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/* Parse the arguments. We don't want the vector reordered, |
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we should pass on to our child the exact arguments we got |
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and just ignore any arguments that aren't flags for us. */ |
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argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, 0); |
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/* If we're not initializing the system and have not |
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specified a runlevel, default to runlevel 3. */ |
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if (init_system_p && initial_runlevel == -1) |
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initial_runlevel = 3; |
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/* Special case for not initializing system. */ |
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if (! init_system_p) |
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{ |
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if (initial_runlevel == -1) |
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error (1, 0, "Must specify runlevel"); |
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error (1, 0, "Should switch to level %d", initial_runlevel); |
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} |
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/* Get name and information about kernel. */ |
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err = uname (&utsname); |
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if (err) |
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error (0, err, "uname"); |
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printf ("init %s running on %s %s (%s)\n", VERSION, |
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utsname.sysname, utsname.release, utsname.machine); |
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fflush (stdout); |
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/* As of now we only support single-user mode. */ |
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if (! single_user_p) |
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{ |
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single_user_p = 1; |
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printf ("Multi-user mode not supported, falling back to single-user mode\n"); |
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fflush (stdout); |
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} |
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/* If we're in single-user mode we fork and try to run |
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/sbin/sh. If we do not find /bin/sh, try other locations. */ |
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if ((pid = fork ()) == 0) |
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{ |
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int i; |
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for (i = 0; shell_paths [i]; i++) |
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{ |
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printf ("trying to execute %s\n", shell_paths [i]); |
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fflush (stdout); |
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err = execl (shell_paths [i], shell_paths [i], NULL); |
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printf ("failed, err is %d\n", err); |
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fflush (stdout); |
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} |
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error (1, err, "Can not run single-user shell"); |
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} |
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else |
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wait (&err); |
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printf ("???\n"); |
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fflush (stdout); |
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for (;;) |
for (;;) |
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; |
; |
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} |
} |