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; }