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/*
* --- T2-COPYRIGHT-NOTE-BEGIN --- * This copyright note is auto-generated by ./scripts/Create-CopyPatch. * * T2 SDE: package/.../sysvinit/rc.c * Copyright (C) 2004 - 2006 The T2 SDE Project * Copyright (C) 1998 - 2003 Clifford Wolf * * More information can be found in the files COPYING and README. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. A copy of the * GNU General Public License can be found in the file COPYING. * --- T2-COPYRIGHT-NOTE-END --- */
#include <errno.h>
#include <grp.h>
#include <sched.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
char env_PREVLEVEL[100]="PREVLEVEL=N";char env_RUNLEVEL[100]="RUNLEVEL=N";char env_TERM[100]="TERM=linux";
char * clean_env[] = { "PATH=/bin:/usr/bin", env_PREVLEVEL, env_RUNLEVEL, env_TERM, NULL};
/* See bits/resource.h and asm/resource.h */struct rlimit rlim_cpu = { RLIM_INFINITY, RLIM_INFINITY };struct rlimit rlim_fsize = { RLIM_INFINITY, RLIM_INFINITY };struct rlimit rlim_data = { RLIM_INFINITY, RLIM_INFINITY };struct rlimit rlim_stack = { RLIM_INFINITY, RLIM_INFINITY };struct rlimit rlim_core = { RLIM_INFINITY, RLIM_INFINITY };struct rlimit rlim_rss = { RLIM_INFINITY, RLIM_INFINITY };struct rlimit rlim_nofile = { 1024, 1024 };struct rlimit rlim_as = { RLIM_INFINITY, RLIM_INFINITY };struct rlimit rlim_nproc = { 2048, 2048 };struct rlimit rlim_memlock = { RLIM_INFINITY, RLIM_INFINITY };struct rlimit rlim_locks = { RLIM_INFINITY, RLIM_INFINITY };
#define GROUP_LIST_SIZE 1
gid_t group_list[GROUP_LIST_SIZE] = { 0 };
/* This prototypes are missing in unistd.h */int setresuid(uid_t ruid, uid_t euid, uid_t suid);int setresgid(gid_t rgid, gid_t egid, gid_t sgid);
/* The first (and only) field in sched_param is sched_priority */struct sched_param sp = { 0 };
#define handle_error(a) if ( a == -1 ) { perror("rc: " #a); return 1; }
int main(int argc, char ** argv) { char command[1024]; int use_btee = 1; int btee_pipe[2]; int i;
/* Copy some environment variables to the new environment if set */ if ( getenv("PREVLEVEL") ) sprintf(env_PREVLEVEL, "PREVLEVEL=%.50s", getenv("PREVLEVEL")); if ( getenv("RUNLEVEL") ) sprintf(env_RUNLEVEL, "RUNLEVEL=%.50s", getenv("RUNLEVEL")); if ( getenv("TERM") ) sprintf(env_TERM, "TERM=%.50s", getenv("TERM"));
/* we never need argv[0] - skipt it */ argv++; argc--;
/* Handle --nobtee option */ if ( argc > 0 && !strcmp(*argv, "--nobtee") ) { use_btee = 0; argv++; argc--; }
/* Display help message */ if ( argc < 2 ) { fprintf(stderr,"\n"" Run SystemV Init-Scripts with a clean environment and detached from\n"" the terminal.\n""\n"" Usage: rc [ --nobtee ] <service> { start | stop | ... | help } [ script options ]\n"); } if ( argc == 0 ) { fprintf(stderr, "\n"" <service> might be one of:\n""\n"); fflush(stderr); system("ls /etc/rc.d/init.d >&2"); } if ( argc < 2 ) { fprintf(stderr, "\n"); return 1; }
/* No btee when viewing the help screen for this service */ if ( !strcmp(argv[1], "help") ) use_btee = 0;
/* Forward output to a 'btee' process */ if ( use_btee ) { if ( pipe(btee_pipe) ) { perror("rc: Can't create pipe for btee"); return 1; } if ( fork() == 0 ) { dup2(btee_pipe[0], 0); close(btee_pipe[0]); close(btee_pipe[1]); execl("/sbin/btee", "btee", "a", "/var/log/init.msg", NULL); perror("rc: Can't exec btee command"); return 1; } else { dup2(btee_pipe[1], 1); close(btee_pipe[0]); close(btee_pipe[1]); } }
/* Set umask, process-group, nice-value and current directory */ handle_error( umask(022) ); handle_error( setpgid(0,0) ); handle_error( setpriority(PRIO_PROCESS, 0, 0) ); handle_error( chdir("/") );
/* Set all ulimits */ handle_error( setrlimit(RLIMIT_CPU, &rlim_cpu) ); handle_error( setrlimit(RLIMIT_FSIZE, &rlim_fsize) ); handle_error( setrlimit(RLIMIT_DATA, &rlim_data) ); handle_error( setrlimit(RLIMIT_STACK, &rlim_stack) ); handle_error( setrlimit(RLIMIT_CORE, &rlim_core) ); handle_error( setrlimit(RLIMIT_RSS, &rlim_rss) ); handle_error( setrlimit(RLIMIT_NOFILE, &rlim_nofile) ); handle_error( setrlimit(RLIMIT_AS, &rlim_as) ); handle_error( setrlimit(RLIMIT_NPROC, &rlim_nproc) ); handle_error( setrlimit(RLIMIT_MEMLOCK, &rlim_memlock) ); handle_error( setrlimit(RLIMIT_LOCKS, &rlim_locks) );
/* Reset all signal handlers */ for (i=1; i<NSIG; i++) { if ( i == SIGKILL ) continue; if ( i == SIGSTOP ) continue; if ( i >= __SIGRTMIN && i < SIGRTMIN ) continue; if( signal(i, SIG_DFL) == SIG_ERR ) { fprintf(stderr, "rc: Can't reset signal #%d: " "%s\n", i, strerror(errno) ); return 1; } }
/* Close all file-descriptors > 2 (1024 seams to be a good value -
* linux/fs.h defines NR_OPEN to 1024*1024, which is too big ;-) */ for (i=3; i<=1024; i++) close(i);
/* Set user and group ids */ handle_error( setgroups(GROUP_LIST_SIZE, group_list) ); handle_error( setresuid(0, 0, 0) ); handle_error( setresgid(0, 0, 0) );
/* clear rt scheduling */ handle_error( sched_setscheduler(0, SCHED_OTHER, &sp) );
/* Run the command in a (non-interactive) login shell (i.e. read
* /etc/profile) and send \004 after running the script if we are * using btee. */ i = snprintf(command, sizeof(command), "%s%s", strchr(*argv, '/') ? "" : "/etc/rc.d/init.d/", *argv); argv++; while (*argv) /* copy args */ i += snprintf(command+i, sizeof(command)-i, " %s", *argv++); i+=snprintf(command+i, sizeof(command)-i, " </dev/null 2>&1%s", use_btee ? "; echo -ne '\004'" : ""); execle("/bin/bash", "-bash", "-l", "-c", command, NULL, clean_env);
/* Oups! Can't exec the shell. */ if ( use_btee ) write(1, "\004", 1); perror("rc: Can't execute shell for spawning init script"); return 1;}
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