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-rw-r--r--inittab.c374
1 files changed, 374 insertions, 0 deletions
diff --git a/inittab.c b/inittab.c
new file mode 100644
index 0000000..0e18e5f
--- /dev/null
+++ b/inittab.c
@@ -0,0 +1,374 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <errno.h>
+#include "ninitfeatures.h"
+#include "initreq.h"
+#include "djb/buffer.h"
+
+#define out(...) err_b(buffer_out,__VA_ARGS__,(char*)0);
+#define outs(X) buffer_puts(buffer_out, X)
+#define outc(X) buffer_putc(buffer_out, X)
+
+char buffer_out_space[4096];
+buffer b_out = BUFFER_INIT(write, -1, buffer_out_space, 4096);
+
+buffer *buffer_out = &b_out;
+
+struct ientry {
+ char *id;
+ char *level;
+ char *action;
+ char **argv;
+};
+
+char *home, *initscript=0, *app_f=0;
+int fd;
+
+void step(char *s)
+ { out("test -d ",s," || mkdir ",s," ; cd ",s," || ops ",s); }
+
+void out_octal(unsigned char x) {
+ outc('\\'); outc('0' + (x>>6));
+ outc('0' + ((x>>3)&7)); outc('0' + (x&7));
+}
+
+void out_txt(char *s) {
+ unsigned char x;
+ while ((x=*s++)) {
+ if (('a' <= x && x<= 'z') ||
+ ('A' <= x && x<= 'Z') || x==' ' || x=='/') outc(x);
+ else out_octal(x);
+ }
+}
+
+void append(char *m) {
+ outs("printf \"");
+ out_txt(m);
+ outs("\\012\"");
+ if (app_f)
+ { out(" >> ",app_f); }
+}
+
+void rm_all() { out("rm_old"); }
+
+void stop_respawn() {
+ app_f = "setup";
+ append("#!/bin/sh\n"
+ "all=`/bin/nsvc -L`\n"
+ "/bin/nsvc -C0 $all\n"
+ "exec /bin/nsvc -r $all");
+ out("chmod 755 setup ; rm -f sync");
+}
+
+void mk_run(char **xx) {
+ out("ln -s ",*xx++," run");
+ app_f = 0;
+ if (*xx==0) return;
+ outs("printf \"");
+ while (*xx) { out_txt(*xx++); out_txt("\n"); }
+ outs("\" > params\n");
+}
+
+void check_file(char *mode, char *file)
+{ out("test ",mode," ",file," || echo '*** Missing file:' ",home,"/",file);}
+
+void check_utmp(char *utmp_file) {
+ out("if test ! -f ",utmp_file," ; then");
+ out(" echo '*** WARNING *** Missing file:' ", utmp_file);
+ out(" echo 'ninit stores in last file the variable INIT_RUNLEVEL'");
+ out(" echo 'ninit does not use this variable. Some other programs'");
+ out(" echo 'can use it (scripts from /etc/init.d/). If you have'");
+ out(" echo 'some troubles, create this file latter!'");
+ out("fi\n");
+}
+
+void die_mem() { die(111,"Out of memory"); }
+
+int main(int Argc, char **Argv) {
+ static char *initdefault;
+ int seen_pf=-1, seen_pw=-1, seen_pn=-1, seen_po=-1;
+ int seen_cad=-1, seen_kbr=-1;
+ int seen_l0=-1, seen_l6=-1;
+ char *p,*s,*service,**argv;
+ int len,argc,k,j;
+ struct ientry *qq,ee;
+
+ s = Argv[1];
+ if (s && s[0]=='-' && s[1]=='I' && s[2]) {
+ initscript = s+2;
+ Argv++; Argc--;
+ }
+
+ if (Argc<4 || Argv[2][0] == 0)
+ { die(100,"usage: ninit-inittab [-I/etc/initscript] /etc/inittab "INITROOT" output_file"); }
+ home = Argv[2];
+
+ if ((fd = open(Argv[1], O_RDONLY)) <0)
+ { die(100, "error opening: ",Argv[1]); }
+
+ if (GLOBAL_READ(fd,s, len,128000))
+ { die(1, "error reading: ", Argv[1]); }
+ close(fd);
+ s[len]=0;
+
+ if ((fd = open(Argv[3], O_CREAT|O_TRUNC|O_WRONLY, 0755)) <0)
+ { die(100, "error opening: ",Argv[3]); }
+ buffer_out->fd = fd;
+
+ argc = splitmem(0,s,'\n');
+ argv=alloca((len+1) * sizeof(char*)); if (argv==0) die_mem();
+ splitmem(argv,s,'\n');
+
+ for (len=0,k=0; argv[k]; k++) {
+ s=argv[k];
+ if (*s=='#' || *s==0) continue;
+ ++len;
+ }
+
+ qq = alloca((len+2)*sizeof(struct ientry)); if (qq==0) die_mem();
+
+ msg("\tvalid ",Argv[1]," entries");
+ for (len=0,k=0; argv[k]; k++) {
+ char **zz;
+ s=argv[k];
+ if (*s == '#' || *s==0) continue;
+ byte_zero(&ee, sizeof(struct ientry));
+
+ ee.id = s;
+ s += str_chr(s,':'); if (*s==0) continue; *s++ = 0;
+ ee.level = s;
+ s += str_chr(s,':'); if (*s==0) continue; *s++ = 0;
+ ee.action = s;
+ s += str_chr(s,':'); if (*s==0) continue; *s++ = 0;
+
+ msg(ee.id,":",ee.level,":",ee.action,":",s);
+ if (!str_diff(ee.action, "initdefault"))
+ initdefault = ee.level;
+ if (*s==0) continue;
+
+ zz = alloca(40 * sizeof(char*)); if (zz==0) die_mem();
+ zz += 40;
+ *--zz = 0;
+
+ /* See if there is an "initscript" (except in single user mode). */
+ if (initscript && str_diff("S",ee.level)) {
+ /* Build command line using "initscript" */
+ *--zz = s;
+ *--zz = ee.action;
+ *--zz = ee.level;
+ *--zz = ee.id;
+ *--zz = initscript;
+ *--zz = "/bin/sh";
+ ee.argv = zz;
+ } else if (strpbrk(s, "~`!$^&*()=|\\{}[];\"'<>?")) {
+ /* See if we need to fire off a shell for this command */
+ *--zz = s;
+ *--zz = "-c";
+ *--zz = "/bin/sh";
+ ee.argv = zz;
+ } else {
+ /* Split up command line arguments */
+ int f;
+ zz -= 22;
+ ee.argv = zz;
+ for (f = 0; f < 20; f++) {
+ while(*s == ' ' || *s == '\t') s++;
+ zz[f] = s;
+
+ if (*s == 0) break;
+ while (*s && *s != ' ' && *s != '\t' && *s != '#') s++;
+
+ if (*s == '#' || *s == 0) {
+ f++;
+ *s = 0;
+ break;
+ }
+ *s++ = 0;
+ }
+ zz[f] = 0;
+ }
+
+ byte_copy(&qq[len], sizeof(ee), &ee);
+ ++len;
+ }
+ for (k=0; k<len; k++)
+ for (j=k+1; j<len; j++)
+ if (!str_diff(qq[k].id, qq[j].id)) {
+ msg(" \a*** WARNING *** ", Argv[1],": duplicated id: ",qq[k].id);
+ }
+
+ if (initdefault==0) { die(100, "unable to find initdefault level"); }
+
+ /* -------------- change bellow this line ---------------- */
+ out("#!/bin/sh\n"
+ "# WARNING: This file was auto-generated.\n"
+ "# Source: ",Argv[1],
+ "\n\nexport PATH=/bin:/usr/bin\n"
+ "umask 022\n"
+ "ops () { echo cd error $1; exit 1; }\n"
+ "rm_old () { rm -f run sync setup params respawn; }\n");
+
+ check_utmp("/var/run/utmp");
+
+ step(home);
+ check_file("-d","sys");
+ check_file("-x","sys/run");
+ check_file("-x","sys/run-wait");
+ check_file("-x","sys/update");
+ check_file("-x","sys/procfs");
+ check_file("-x","sys/remove");
+ check_file("-p","in");
+ check_file("-p","out");
+
+ out("\nif test -f .services_ready; then\n"
+ " echo Please read ",home,"/.services_ready\n"
+ " exit 1\nfi\n");
+
+ out("test -d default || mkdir default\n"
+ "test -f default/depends && "
+ "mv -f default/depends default/depends.old\n"
+ "rm -f default/depends\n");
+
+ step("sysvinit");
+ rm_all();
+ out("ln -sf /sbin/ninit-sysvinit run");
+ app_f = "sysvinit-timeout";
+ append("90:0\n"
+ "DO NOT remove or rename this file\n"
+ "unless you know what are you doing!");
+ out("cd ..\n");
+
+ step("powerS");
+ rm_all();
+ out("ln -sf /sbin/ninit-sysvinit run\n"
+ "echo powerS > params");
+ out("cd ..\n");
+
+ step("update");
+ rm_all();
+ out("ln -sf /sbin/ninit-reload run");
+ app_f = "params";
+ append("-v\n-Rupdate\n-a30\n-u\n/sbin/ninit");
+ out("cd ..\n",
+ "ln -sf update level","U\n",
+ "ln -sf update level","Q\n");
+
+ step("ngetty");
+ rm_all();
+ out("ln -s /sbin/ngetty run");
+ app_f = "params";
+ append("1\n2\n3\n4\n5\n6");
+ out("> respawn");
+ app_f = "environ";
+ append("\nTERM=linux");
+ out("cd ..\n");
+
+
+ for (k=0; k<len; k++) {
+ char **xx;
+ byte_copy(&ee, sizeof(ee), &qq[k]);
+ xx=ee.argv;
+ if (!str_diff(ee.action, "off")) {
+ msg("\tskipping entry\t", ee.id,":",ee.level,":",ee.action,": ...");
+ continue;
+ }
+
+ service = alloca(4+str_len(ee.id)); if (service==0) die_mem();
+ service[0]='_';
+ str_copy(service+1,ee.id);
+
+ if (!str_diff(ee.action, "ctrlaltdel")) { seen_cad = k; }
+ else if (!str_diff(ee.action, "kbrequest")) { seen_kbr = k; }
+ else if (!str_diff(ee.action, "sysinit") ||
+ !str_diff(ee.action, "boot") ||
+ !str_diff(ee.action, "bootwait") ||
+ !str_diff(ee.action, "once") ||
+ !str_diff(ee.action, "powerfail") ||
+ !str_diff(ee.action, "powerwait") ||
+ !str_diff(ee.action, "powerfailnow") ||
+ !str_diff(ee.action, "powerokwait")) {
+ step(service);
+ rm_all();
+ if (ee.action[0] == 's' || ee.action[4] == 'w') out("> sync");
+ mk_run(xx);
+ out("cd ..\n");
+ if (ee.action[0] != 'p') {
+ app_f = "default/depends\n";
+ append(service);
+ }
+ if (!str_diff(ee.action, "powerfail")) { seen_pf = k; }
+ if (!str_diff(ee.action, "powerwait")) { seen_pw = k;}
+ if (!str_diff(ee.action, "powerfailnow")) { seen_pn = k; }
+ if (!str_diff(ee.action, "powerokwait")) { seen_po = k; }
+ }
+ else {
+ step(service);
+ rm_all();
+ if (!str_diff(ee.action, "wait")) {
+ p = ee.level;
+ out("> sync");
+ if (p[0] && p[1]==0) {
+ if (*p=='0') { seen_l0=k; stop_respawn(); }
+ if (*p=='6') { seen_l6=k; stop_respawn(); }
+ *--xx = p;
+ *--xx = "/sbin/ninit-runlevel";
+ }
+ }
+ if (!str_diff(ee.action,"respawn")) {
+ out("> respawn");
+ if (strstr(ee.argv[0],"getty")) {
+ *--xx = ee.id;
+ *--xx = "/sbin/pututmpid";
+ }
+ }
+ mk_run(xx);
+ out("cd ..\n");
+
+ if (!str_diff(ee.action, "wait")) {
+ p = ee.level;
+ if (p[0] && p[1]==0) out("ln -s ",service," level",p, "\n");
+ }
+
+ s = ee.level;
+ s += str_chr(s, *initdefault);
+ if (*s) {
+ app_f = "default/depends\n";
+ append(service);
+ }
+ }
+ }
+
+ s = "ln -sf _";
+ if (seen_kbr>=0 && seen_l6>=0) out(s,qq[seen_l6].id," kbreq");
+ if (seen_cad>=0 && seen_l0>=0) out(s,qq[seen_l0].id," ctrlaltdel");
+
+ if (seen_l0>=0) out(s,qq[seen_l0].id," halt");
+ if (seen_l6>=0) out(s,qq[seen_l6].id," reboot");
+
+ /* XXX powerfail or powerwait ??? ; first may be ;-) */
+ if (seen_pf>=0 && seen_pf < seen_pw) out(s,qq[seen_pf].id," powerF");
+ if (seen_pw>=0 && seen_pw < seen_pf) out(s,qq[seen_pw].id," powerF");
+
+ if (seen_pn>=0) out(s,qq[seen_pn].id," powerL");
+ if (seen_po>=0) out(s,qq[seen_po].id," powerO");
+ out("");
+
+ out("test -d _l0 && echo INIT_HALT=POWERDOWN > _l0/environ\n"
+ "if test -d _l6 ; then");
+ app_f = "_l6/environ";
+ append("#INIT_HALT=POWERDOWN\n"
+ "#INIT_HALT=HALT\n"
+ "INIT_HALT");
+ out("fi\n");
+
+ app_f = ".services_ready";
+ append("*** WARNING ***\n"
+ "Someone made services in this directory.\n"
+ "If you want to overwrite them remove me.\n");
+
+ buffer_flush(buffer_out);
+
+ close(fd);
+ return 0;
+}
generated by cgit v1.2.3 (git 2.46.0) at 2026-01-26 20:09:30 +0000