mirror of
https://github.com/urbit/shrub.git
synced 2024-12-15 12:43:31 +03:00
346 lines
7.5 KiB
C
346 lines
7.5 KiB
C
/* v/main.c
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**
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** This file is in the public domain.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <setjmp.h>
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#include <signal.h>
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#include <gmp.h>
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#include <stdint.h>
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#include <uv.h>
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#include <sigsegv.h>
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#include <curses.h>
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#include <termios.h>
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#include <term.h>
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#include <dirent.h>
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#define U2_GLOBAL
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#define C3_GLOBAL
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#include "all.h"
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#include "v/vere.h"
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/** Legacy fixed jet linkage. Destroy me please.
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**/
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/* External drivers.
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*/
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extern u2_ho_driver j2_da(k_191);
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/* Built-in battery drivers. Null `cos` terminates.
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*/
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u2_ho_driver *HostDriverBase[] = {
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&j2_k_191_d,
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0
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};
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/* _main_getopt(): extract option map from command line.
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*/
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static u2_bean
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_main_getopt(c3_i argc, c3_c** argv)
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{
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c3_i ch_i;
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u2_Host.ops_u.abo = u2_no;
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u2_Host.ops_u.gab = u2_no;
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u2_Host.ops_u.loh = u2_no;
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u2_Host.ops_u.dem = u2_no;
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u2_Host.ops_u.pro = u2_no;
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u2_Host.ops_u.veb = u2_yes;
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u2_Host.ops_u.rez = u2_no;
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u2_Host.ops_u.nuu = u2_no;
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u2_Host.ops_u.kno_w = DefaultKernel;
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u2_Host.ops_u.fuz_w = 0;
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while ( (ch_i = getopt(argc, argv, "k:f:h:I:Lcdsagqv")) != -1 ) {
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switch ( ch_i ) {
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case 'L': { u2_Host.ops_u.loh = u2_yes; break; }
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case 'a': { u2_Host.ops_u.abo = u2_yes; break; }
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case 'c': { u2_Host.ops_u.nuu = u2_yes; break; }
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case 'd': { u2_Host.ops_u.dem = u2_yes; break; }
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case 'g': { u2_Host.ops_u.gab = u2_yes; break; }
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case 'k': {
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c3_w arg_w = atoi(optarg);
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if ( (arg_w > 0) && (arg_w < 256) ) {
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u2_Host.ops_u.kno_w = arg_w;
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}
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else return u2_no;
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break;
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}
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case 'f': {
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c3_w arg_w = atoi(optarg);
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if ( (arg_w > 0) && (arg_w < 100) ) {
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u2_Host.ops_u.fuz_w = arg_w;
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}
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else return u2_no;
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break;
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}
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case 'I': {
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u2_Host.ops_u.imp_c = strdup(optarg);
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break;
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}
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case 'h': {
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u2_Host.ops_u.hom_c = strdup(optarg);
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break;
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}
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case 'q': { u2_Host.ops_u.veb = u2_no; break; }
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case 'v': { u2_Host.ops_u.veb = u2_yes; break; }
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case '?': default: {
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return u2_no;
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}
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}
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}
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if ( u2_Host.ops_u.hom_c == 0 ) {
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u2_Host.ops_u.hom_c = getenv("URBIT_HOME");
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if ( u2_Host.ops_u.hom_c == 0 ) {
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c3_c* hom_c = getenv("HOME");
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if ( !hom_c ) {
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fprintf(stderr, "$URBIT_HOME or $HOME must be set\n");
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exit(1);
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} else {
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u2_Host.ops_u.hom_c = malloc(strlen(hom_c) + 7);
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sprintf(u2_Host.ops_u.hom_c, "%s/urbit", hom_c);
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}
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}
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{
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DIR* rid_u;
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if ( 0 == (rid_u = opendir(u2_Host.ops_u.hom_c)) ) {
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if ( 0 != mkdir(u2_Host.ops_u.hom_c, 0755) ) {
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perror(u2_Host.ops_u.hom_c);
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exit(1);
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}
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}
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else closedir(rid_u);
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}
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}
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printf("vere: urbit home is %s\n", u2_Host.ops_u.hom_c);
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if ( argc != (optind + 1) ) {
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return u2_no;
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} else {
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{
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c3_c* ash_c;
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if ( (ash_c = strrchr(argv[optind], '/')) && (ash_c[1] == 0) ) {
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*ash_c = 0;
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}
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}
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u2_Host.ops_u.cpu_c = strdup(argv[optind]);
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return u2_yes;
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}
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}
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/* u2_ve_usage(): print usage and exit.
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*/
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static void
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u2_ve_usage(c3_i argc, c3_c** argv)
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{
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fprintf(stderr, "%s: usage: [-v] [-k stage] computer\n", argv[0]);
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exit(1);
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}
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/* u2_ve_panic(): panic and exit.
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*/
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static void
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u2_ve_panic(c3_i argc, c3_c** argv)
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{
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fprintf(stderr, "%s: gross system failure\n", argv[0]);
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exit(1);
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}
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/* u2_ve_sysopt(): apply option map to system state.
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*/
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static void
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u2_ve_sysopt()
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{
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{
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u2_Local = strdup(u2_Host.ops_u.cpu_c);
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}
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u2_System = U2_LIB;
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u2_Flag_Abort = u2_Host.ops_u.abo;
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u2_Flag_Garbage = u2_Host.ops_u.gab;
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u2_Flag_Profile = u2_Host.ops_u.pro;
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u2_Flag_Verbose = u2_Host.ops_u.veb;
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}
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static jmp_buf Signal_buf;
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#ifndef SIGSTKSZ
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# define SIGSTKSZ 16384
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#endif
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static uint8_t Sigstk[SIGSTKSZ];
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volatile enum { sig_none, sig_overflow, sig_interrupt } Sigcause;
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static void
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overflow_handler(int emergency, stackoverflow_context_t scp)
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{
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if ( 1 == emergency ) {
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write(2, "stack emergency\n", strlen("stack emergency" + 2));
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exit(1);
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} else {
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Sigcause = sig_overflow;
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longjmp(Signal_buf, 1);
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}
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}
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static void
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interrupt_handler(int x)
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{
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Sigcause = sig_interrupt;
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longjmp(Signal_buf, 1);
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}
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c3_i
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main(c3_i argc,
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c3_c** argv)
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{
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c3_w kno_w;
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// Parse options.
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//
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if ( u2_no == _main_getopt(argc, argv) ) {
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u2_ve_usage(argc, argv);
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return 1;
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}
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u2_ve_sysopt();
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if ( u2_yes == u2_Host.ops_u.dem ) {
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c3_i pid;
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signal(SIGHUP, SIG_IGN);
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if ( -1 == (pid = fork()) ) {
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perror("fork");
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exit(1);
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}
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if ( pid ) {
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printf("%s: daemon: process %d\n", argv[0], pid);
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exit(1);
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}
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}
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// Instantiate process globals.
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{
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u2_wr_check_init(u2_Host.ops_u.cpu_c);
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if ( (u2_no == u2_Host.ops_u.nuu) &&
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(u2_no == u2_Host.ops_u.rez) &&
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(u2_yes == u2_loom_load()) )
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{
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u2_Host.wir_r = u2_ray_of(0, 0);
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u2_Wire = u2_Host.wir_r;
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u2_Host.cpu_c = u2_Host.ops_u.cpu_c;
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u2_Host.arv_u = u2_Arv;
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u2_Arv->ova.egg_u = u2_Arv->ova.geg_u = 0;
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// Horrible ancient stuff.
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//
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kno_w = u2_Host.arv_u->kno_w;
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u2_Host.kno_w = kno_w;
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u2_ho_push();
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}
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else {
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u2_loom_boot();
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u2_Host.wir_r = u2_wr_init(c3__rock, u2_ray_of(0, 0), u2_ray_of(1, 0));
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u2_Wire = u2_Host.wir_r;
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u2_Host.cpu_c = u2_Host.ops_u.cpu_c;
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u2_Host.arv_u = u2_Arv;
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}
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}
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// If we have not loaded from checkpoint, build kernel.
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//
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if ( 0 != u2_Host.arv_u->ent_w ) {
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u2_reck_time(u2_Host.arv_u);
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u2_reck_numb(u2_Host.arv_u);
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{
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c3_c* dyt_c = u2_cr_string(u2_Host.arv_u->wen);
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printf("time: %s\n", dyt_c);
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free(dyt_c);
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}
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}
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else {
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// Set outside bail trap. Should not be used, but you never know...
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//
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if ( 0 != u2_cm_trap() ) {
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u2_ve_panic(argc, argv);
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}
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else {
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// Set boot and goal stages.
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{
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if ( (0 == u2_Host.ops_u.kno_w) || (u2_Host.ops_u.kno_w > 255) ) {
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kno_w = DefaultKernel;
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} else {
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kno_w = u2_Host.ops_u.kno_w;
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}
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}
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// Load the system.
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//
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{
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u2_Host.kno_w = u2_Host.ops_u.kno_w;
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u2_reck_boot(u2_Host.arv_u);
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}
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u2_cm_done();
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}
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}
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// Install signal handlers and set buffers.
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//
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// Note that we use the sigmask-restoring variant. Essentially, when
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// we get a signal, we force the system back into the just-booted state.
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// If anything goes wrong during boot (above), it's curtains.
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{
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if ( 0 != setjmp(Signal_buf) ) {
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switch ( Sigcause ) {
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case sig_overflow: printf("[stack overflow]\r\n"); break;
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case sig_interrupt: printf("[interrupt]\r\n"); break;
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default: printf("[signal error!]\r\n"); break;
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}
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Sigcause = sig_none;
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signal(SIGINT, SIG_DFL);
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stackoverflow_deinstall_handler();
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// Print the trace, do a GC, etc.
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//
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// This is half-assed at present, so we exit.
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//
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u2_lo_sway(0, u2k(u2_wire_tax(u2_Wire)));
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u2_lo_bail(u2_Host.arv_u);
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exit(1);
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}
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#if 1
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if ( -1 == stackoverflow_install_handler
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(overflow_handler, Sigstk, SIGSTKSZ) )
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{
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fprintf(stderr, "overflow_handler: install failed\n");
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exit(1);
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}
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signal(SIGINT, interrupt_handler);
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signal(SIGIO, SIG_IGN);
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#endif
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}
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u2_lo_loop(u2_Host.arv_u);
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return 0;
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}
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