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path: root/src/shutdown/s6-linux-init-shutdownd.c
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Diffstat (limited to 'src/shutdown/s6-linux-init-shutdownd.c')
-rw-r--r--src/shutdown/s6-linux-init-shutdownd.c113
1 files changed, 58 insertions, 55 deletions
diff --git a/src/shutdown/s6-linux-init-shutdownd.c b/src/shutdown/s6-linux-init-shutdownd.c
index c6d6316..90d43e8 100644
--- a/src/shutdown/s6-linux-init-shutdownd.c
+++ b/src/shutdown/s6-linux-init-shutdownd.c
@@ -36,6 +36,41 @@
static char const *basedir = BASEDIR ;
+static inline void run_stage3 (char const *basedir, char const *const *envp)
+{
+ pid_t pid ;
+ 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)) ;
+ pid = child_spawn0(stage3_argv[0], stage3_argv, envp) ;
+ 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) ;
+ }
+ }
+ else strerr_warnwu2sys("spawn ", stage3) ;
+}
+
static inline void prepare_shutdown (char c, unsigned int *what, tain_t *deadline, unsigned int *grace_time)
{
uint32_t u ;
@@ -43,22 +78,23 @@ static inline void prepare_shutdown (char c, unsigned int *what, tain_t *deadlin
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") ;
+ *what = byte_chr("Shpr", c, 4) ;
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)
+static inline void handle_fifo (buffer *b, unsigned int *what, tain_t *deadline, unsigned int *grace_time)
{
for (;;)
{
char c ;
- ssize_t r = sanitize_read(buffer_get(buffer_0small, &c, 1)) ;
+ ssize_t r = sanitize_read(buffer_get(b, &c, 1)) ;
if (r == -1) strerr_diefu1sys(111, "read from pipe") ;
else if (!r) break ;
switch (c)
{
+ case 'S' :
case 'h' :
case 'p' :
case 'r' :
@@ -80,7 +116,6 @@ static inline void handle_stdin (unsigned int *what, tain_t *deadline, unsigned
static inline void prepare_stage4 (char const *basedir, unsigned int what)
{
- static char const *table[3] = { "halt", "poweroff", "reboot" } ;
buffer b ;
int fd ;
char buf[512] ;
@@ -92,9 +127,9 @@ static inline void prepare_stage4 (char const *basedir, unsigned int what)
if (buffer_puts(&b,
"#!" EXECLINE_SHEBANGPREFIX "/execlineb -P\n\n"
EXECLINE_EXTBINPREFIX "foreground { "
- S6_LINUX_INIT_LIBEXECPREFIX "s6-linux-init-umountall }\n"
- S6_LINUX_INIT_LIBEXECPREFIX "s6-linux-init-") < 0
- || buffer_puts(&b, table[what-1]) < 0
+ S6_LINUX_INIT_BINPREFIX "s6-linux-init-umountall }\n"
+ S6_LINUX_INIT_BINPREFIX "s6-linux-init-hpr -") < 0
+ || buffer_put(&b, "hpr" + what - 1, 1) < 0
|| buffer_putsflush(&b, " -f\n") < 0)
strerr_diefu2sys(111, "write to ", STAGE4_FILE ".new") ;
if (fchmod(fd, S_IRWXU) == -1)
@@ -106,10 +141,12 @@ static inline void prepare_stage4 (char const *basedir, unsigned int what)
int main (int argc, char const *const *argv, char const *const *envp)
{
- pid_t pid ;
- tain_t deadline ;
unsigned int what = 0 ;
unsigned int grace_time = 3000 ;
+ tain_t deadline ;
+ int fdr, fdw ;
+ buffer b ;
+ char buf[64] ;
PROG = "s6-linux-init-shutdownd" ;
{
@@ -139,80 +176,46 @@ int main (int argc, char const *const *argv, char const *const *envp)
strerr_warnwu2sys("exec ", stage4_argv[0]) ;
}
- fd_close(1) ;
- fd_close(0) ;
-
- if (open_read(SHUTDOWND_FIFO))
+ fdr = open_read(SHUTDOWND_FIFO) ;
+ if (fdr == -1 || coe(fdr) == -1)
strerr_diefu3sys(111, "open ", SHUTDOWND_FIFO, " for reading") ;
- if (open_write(SHUTDOWND_FIFO) != 1)
+ fdw = open_write(SHUTDOWND_FIFO) ;
+ if (fdw == -1 || coe(fdw) == -1)
strerr_diefu3sys(111, "open ", SHUTDOWND_FIFO, " for writing") ;
if (sig_ignore(SIGPIPE) == -1)
strerr_diefu1sys(111, "sig_ignore SIGPIPE") ;
+ buffer_init(&b, &buffer_read, fdr, buf, 64) ;
tain_now_g() ;
tain_add_g(&deadline, &tain_infinite_relative) ;
for (;;)
{
- iopause_fd x = { .fd = 0, .events = IOPAUSE_READ } ;
+ iopause_fd x = { .fd = fdr, .events = IOPAUSE_READ } ;
int r = iopause_g(&x, 1, &deadline) ;
if (r == -1) strerr_diefu1sys(111, "iopause") ;
if (!r)
{
+ run_stage3(basedir, envp) ;
+ tain_now_g() ;
if (what) break ;
tain_add_g(&deadline, &tain_infinite_relative) ;
continue ;
}
if (x.revents & IOPAUSE_READ)
- handle_stdin(&what, &deadline, &grace_time) ;
+ handle_fifo(&b, &what, &deadline, &grace_time) ;
}
-
- /* Stage 3 */
-
+ fd_close(fdw) ;
+ fd_close(fdr) ;
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)) ;
- pid = child_spawn0(stage3_argv[0], stage3_argv, envp) ;
- 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) ;
- }
- }
- else strerr_warnwu2sys("spawn ", stage3) ;
- }
+ if (fd_copy(2, 1) == -1) strerr_warnwu1sys("fd_copy") ;
/* The end is coming! */
prepare_stage4(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...") ;
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