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path: root/src/state/s6-linux-init-shutdownd.c
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Diffstat (limited to 'src/state/s6-linux-init-shutdownd.c')
-rw-r--r--src/state/s6-linux-init-shutdownd.c241
1 files changed, 0 insertions, 241 deletions
diff --git a/src/state/s6-linux-init-shutdownd.c b/src/state/s6-linux-init-shutdownd.c
deleted file mode 100644
index e330ac6..0000000
--- a/src/state/s6-linux-init-shutdownd.c
+++ /dev/null
@@ -1,241 +0,0 @@
-/* ISC license. */
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <string.h>
-#include <errno.h>
-#include <signal.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <sys/wait.h>
-
-#include <skalibs/posixplz.h>
-#include <skalibs/uint32.h>
-#include <skalibs/types.h>
-#include <skalibs/allreadwrite.h>
-#include <skalibs/bytestr.h>
-#include <skalibs/buffer.h>
-#include <skalibs/strerr2.h>
-#include <skalibs/sgetopt.h>
-#include <skalibs/stralloc.h>
-#include <skalibs/sig.h>
-#include <skalibs/tai.h>
-#include <skalibs/djbunix.h>
-#include <skalibs/iopause.h>
-#include <skalibs/skamisc.h>
-
-#include "defaults.h"
-#include "initctl.h"
-#include "hpr.h"
-
-#define STAGE4_FILE "stage 4"
-
-#define USAGE "s6-linux-init-shutdownd [ -b bindir ] [ -c basedir ] [ -g gracetime ]"
-#define dieusage() strerr_dieusage(100, USAGE)
-
-static char const *basedir = BASEDIR ;
-
-static inline void prepare_shutdown (char c, unsigned int *what, tain_t *deadline, unsigned int *grace_time)
-{
- uint32_t u ;
- char pack[TAIN_PACK] ;
- ssize_t r = sanitize_read(buffer_get(buffer_0small, pack, TAIN_PACK)) ;
- if (r == -1) strerr_diefu1sys(111, "read from pipe") ;
- if (r < TAIN_PACK + 4) strerr_dief1x(101, "bad shutdown protocol") ;
- tain_unpack(pack, deadline) ;
- uint32_unpack_big(pack + TAIN_PACK, &u) ;
- if (u && u <= 300000) *grace_time = u ;
- *what = 1 + byte_chr("hpr", c, 3) ;
-}
-
-static inline void handle_stdin (unsigned int *what, tain_t *deadline, unsigned int *grace_time)
-{
- for (;;)
- {
- char c ;
- ssize_t r = sanitize_read(buffer_get(buffer_0small, &c, 1)) ;
- if (r == -1) strerr_diefu1sys(111, "read from pipe") ;
- else if (!r) break ;
- switch (c)
- {
- case 'h' :
- case 'p' :
- case 'r' :
- prepare_shutdown(c, what, deadline, grace_time) ;
- break ;
- case 'c' :
- *what = 0 ;
- tain_add_g(deadline, &tain_infinite_relative) ;
- break ;
- default :
- {
- char s[2] = { c, 0 } ;
- strerr_warnw2x("unknown command: ", s) ;
- }
- break ;
- }
- }
-}
-
-static inline void prepare_stage4 (char const *bindir, char const *basedir, unsigned int what)
-{
- static char const *table[3] = { "halt", "poweroff", "reboot" } ;
- stralloc sa = STRALLOC_ZERO ;
- buffer b ;
- char buf[512] ;
- int fd ;
- unlink_void(STAGE4_FILE ".new") ;
- fd = open_excl(STAGE4_FILE ".new") ;
- if (fd == -1) strerr_diefu3sys(111, "open ", STAGE4_FILE ".new", " for writing") ;
- buffer_init(&b, &buffer_write, fd, buf, 512) ;
-
- if (buffer_puts(&b, "#!") == -1
- || buffer_puts(&b, bindir) == -1
- || buffer_puts(&b, "/execlineb -P\n\n") == -1)
- strerr_diefu2sys(111, "write to ", STAGE4_FILE ".new") ;
- if (!string_quote(&sa, basedir, strlen(basedir)))
- strerr_diefu1sys(111, "string_quote") ;
- if (buffer_put(&b, sa.s, sa.len) == -1
- || buffer_puts(&b, "/bin/" STAGE4 " ") == -1
- || buffer_puts(&b, table[what-1]) == -1
- || buffer_putsflush(&b, "\n") == -1)
- strerr_diefu2sys(111, "write to ", STAGE4_FILE ".new") ;
- stralloc_free(&sa) ;
- if (fchmod(fd, S_IRWXU) == -1)
- strerr_diefu2sys(111, "fchmod ", STAGE4_FILE ".new") ;
- if (fsync(fd) == -1)
- strerr_diefu2sys(111, "fsync ", STAGE4_FILE ".new") ;
- fd_close(fd) ;
- if (rename(STAGE4_FILE ".new", STAGE4_FILE) == -1)
- strerr_diefu4sys(111, "rename ", STAGE4_FILE ".new", " to ", STAGE4_FILE) ;
-}
-
-int main (int argc, char const *const *argv)
-{
- char const *bindir = BINDIR ;
- pid_t pid ;
- tain_t deadline ;
- unsigned int what = 0 ;
- unsigned int grace_time = 3000 ;
- int notif = 0 ;
- PROG = "s6-linux-init-shutdownd" ;
-
- {
- subgetopt_t l = SUBGETOPT_ZERO ;
- for (;;)
- {
- int opt = subgetopt_r(argc, argv, "b:c:g:", &l) ;
- if (opt == -1) break ;
- switch (opt)
- {
- case 'b' : bindir = l.arg ; break ;
- case 'c' : basedir = l.arg ; break ;
- case 'g' : if (!uint0_scan(l.arg, &grace_time)) dieusage() ; break ;
- default : dieusage() ;
- }
- }
- argc -= l.ind ; argv += l.ind ;
- }
- if (bindir[0] != '/')
- strerr_dief2x(100, "bindir", " must be an absolute path") ;
- if (basedir[0] != '/')
- strerr_dief2x(100, "basedir", " must be an absolute path") ;
- if (grace_time > 300000) grace_time = 300000 ;
-
- /* if we're in stage 4, exec it immediately */
- {
- char const *stage4_argv[2] = { STAGE4_FILE, 0 } ;
- pathexec_run(stage4_argv[0], stage4_argv, (char const *const *)environ) ;
- if (errno != ENOENT)
- strerr_warnwu2sys("exec ", stage4_argv[0]) ;
- }
-
- fd_close(1) ;
- fd_close(0) ;
-
- if (open_read(SHUTDOWND_FIFO))
- strerr_diefu3sys(111, "open ", SHUTDOWND_FIFO, " for reading") ;
- if (open_write(SHUTDOWND_FIFO) != 1)
- strerr_diefu3sys(111, "open ", SHUTDOWND_FIFO, " for writing") ;
- if (sig_ignore(SIGPIPE) == -1)
- strerr_diefu1sys(111, "sig_ignore SIGPIPE") ;
- tain_now_g() ;
- tain_add_g(&deadline, &tain_infinite_relative) ;
-
- for (;;)
- {
- iopause_fd x = { .fd = 0, .events = IOPAUSE_READ } ;
- int r = iopause_g(&x, 1, &deadline) ;
- if (r == -1) strerr_diefu1sys(111, "iopause") ;
- if (!r)
- {
- if (what) break ;
- tain_add_g(&deadline, &tain_infinite_relative) ;
- continue ;
- }
- if (x.revents & IOPAUSE_READ)
- handle_stdin(&what, &deadline, &grace_time) ;
- }
-
-
- /* Stage 3 */
-
- fd_close(1) ;
- fd_close(0) ;
- if (open_readb("/dev/null"))
- strerr_diefu1sys(111, "open /dev/null for reading") ;
- if (open_write("/dev/console") != 1 || ndelay_off(1) == -1)
- strerr_diefu1sys(111, "open /dev/console for writing") ;
- {
- size_t basedirlen = strlen(basedir) ;
- char stage3[basedirlen + sizeof("/" STAGE3)] ;
- char const *stage3_argv[2] = { stage3, 0 } ;
- memcpy(stage3, basedir, basedirlen) ;
- memcpy(stage3 + basedirlen, "/" STAGE3, sizeof("/" STAGE3)) ;
- sig_block(SIGCHLD) ;
- pid = child_spawn0(stage3_argv[0], stage3_argv, (char const *const *)environ) ;
- if (!pid) strerr_warnwu2sys("spawn ", stage3) ;
- sig_unblock(SIGCHLD) ;
- if (pid)
- {
- int wstat ;
- if (wait_pid(pid, &wstat) == -1) strerr_diefu1sys(111, "waitpid") ;
- if (WIFSIGNALED(wstat))
- {
- char fmt[UINT_FMT] ;
- fmt[uint_fmt(fmt, WTERMSIG(wstat))] = 0 ;
- strerr_warnw3x(stage3, " was killed by signal ", fmt) ;
- }
- else if (WEXITSTATUS(wstat))
- {
- char fmt[UINT_FMT] ;
- fmt[uint_fmt(fmt, WTERMSIG(wstat))] = 0 ;
- strerr_warnw3x(stage3, " was killed by signal ", fmt) ;
- }
- else if (WEXITSTATUS(wstat))
- {
- char fmt[UINT_FMT] ;
- fmt[uint_fmt(fmt, WEXITSTATUS(wstat))] = 0 ;
- strerr_warnw3x(stage3, " exited ", fmt) ;
- }
- }
- }
-
-
- /* The end is coming! */
-
- prepare_stage4(bindir, basedir, what) ;
- if (fd_move(2, 1) == -1) strerr_warnwu1sys("fd_move") ;
- sync() ;
- if (sig_ignore(SIGTERM) == -1) strerr_warnwu1sys("sig_ignore SIGTERM") ;
- strerr_warni1x("sending all processes the TERM signal...") ;
- kill(-1, SIGTERM) ;
- kill(-1, SIGCONT) ;
- tain_from_millisecs(&deadline, grace_time) ;
- tain_add_g(&deadline, &deadline) ;
- deepsleepuntil_g(&deadline) ;
- sync() ;
- strerr_warni1x("sending all processes the KILL signal...") ;
- kill(-1, SIGKILL) ;
- return 0 ;
-}
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