void
cerebrod_daemon_init(void)
{
/* Based on code in Unix network programming by R. Stevens */
pid_t pid;
int i;
pid = Fork();
if (pid != 0) /* Terminate Parent */
exit(0);
setsid();
Signal(SIGHUP, SIG_IGN);
pid = Fork();
if (pid != 0) /* Terminate 1st Child */
exit(0);
Chdir("/");
Umask(0);
/* Don't use Close() wrapper, we don't want to exit on error */
for (i = 0; i < 64; i++)
close(i);
}
/* applies to fd all options belonging to phase */
int applyopts_named(const char *filename, struct opt *opts, unsigned int phase) {
struct opt *opt;
if (!opts) return 0;
opt = opts; while (opt->desc != ODESC_END) {
if (opt->desc == ODESC_DONE ||
opt->desc->phase != phase && phase != PH_ALL ||
!(opt->desc->group & GROUP_NAMED)) {
++opt; continue; }
switch (opt->desc->optcode) {
case OPT_GROUP_EARLY:
case OPT_GROUP:
if (Chown(filename, -1, opt->value.u_gidt) < 0) {
Error3("chown(\"%s\", -1, "F_gid"): %s", filename,
opt->value.u_gidt, strerror(errno));
}
break;
case OPT_USER_EARLY:
case OPT_USER:
if (Chown(filename, opt->value.u_uidt, -1) < 0) {
Error3("chown(\"%s\", "F_uid", -1): %s", filename,
opt->value.u_uidt, strerror(errno));
}
break;
case OPT_PERM_EARLY:
case OPT_PERM:
if (Chmod(filename, opt->value.u_modet) < 0) {
Error3("chmod(\"%s\", "F_mode"): %s",
filename, opt->value.u_modet, strerror(errno));
}
break;
case OPT_UNLINK_EARLY:
case OPT_UNLINK:
case OPT_UNLINK_LATE:
if (Unlink(filename) < 0) {
if (errno == ENOENT) {
Warn2("unlink(\"%s\"): %s", filename, strerror(errno));
} else {
Error2("unlink(\"%s\"): %s", filename, strerror(errno));
}
}
break;
case OPT_UMASK:
if (Umask(opt->value.u_modet) < 0) {
/* linux docu says it always succeeds, but who believes it? */
Error2("umask("F_mode"): %s", opt->value.u_modet, strerror(errno));
}
break;
default: Error1("applyopts_named(): option \"%s\" not implemented",
opt->desc->defname);
break;
}
opt->desc = ODESC_DONE;
++opt;
}
return 0;
}
