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Diffstat (limited to 'src/state/s6-linux-init-shutdown.c')
-rw-r--r--src/state/s6-linux-init-shutdown.c268
1 files changed, 0 insertions, 268 deletions
diff --git a/src/state/s6-linux-init-shutdown.c b/src/state/s6-linux-init-shutdown.c
deleted file mode 100644
index bb0391d..0000000
--- a/src/state/s6-linux-init-shutdown.c
+++ /dev/null
@@ -1,268 +0,0 @@
-/* ISC license. */
-
-#include <stdint.h>
-#include <string.h>
-#include <unistd.h>
-#include <signal.h>
-#include <sys/stat.h>
-#include <errno.h>
-#include <time.h>
-#include <utmpx.h>
-
-#include <skalibs/uint32.h>
-#include <skalibs/types.h>
-#include <skalibs/allreadwrite.h>
-#include <skalibs/strerr2.h>
-#include <skalibs/sgetopt.h>
-#include <skalibs/sig.h>
-#include <skalibs/tai.h>
-#include <skalibs/djbunix.h>
-#include <skalibs/djbtime.h>
-
-#include "defaults.h"
-#include "initctl.h"
-#include "hpr.h"
-
-#ifndef UT_NAMESIZE
-#define UT_NAMESIZE 32
-#endif
-
-#define USAGE "s6-linux-init-shutdown [ -h | -p | -r | -k ] [ -f | -F ] [ -a ] [ -t sec ] time [ message ] or s6-linux-init-shutdown -c [ message ]"
-#define dieusage() strerr_dieusage(100, USAGE)
-
-#define AC_FILE "/etc/shutdown.allow"
-#define AC_BUFSIZE 4096
-#define AC_MAX 64
-#define AC_SHORT_MESSAGE "no authorized users logged in\n"
-#define AC_MESSAGE "s6-linux-init-shutdown: " AC_SHORT_MESSAGE
-
-
- /* shutdown 01:23: date/time format parsing */
-
-static inline void add_one_day (struct tm *tm)
-{
- tm->tm_isdst = -1 ;
- if (tm->tm_mday++ < 31) return ;
- tm->tm_mday = 1 ;
- if (tm->tm_mon++ < 11) return ;
- tm->tm_mon = 0 ;
- tm->tm_year++ ;
-}
-
-static inline void parse_hourmin (tain_t *when, char const *s)
-{
- tai_t taithen ;
- struct tm tmnow, tmthen ;
- unsigned int hour, minute ;
- size_t len = uint_scan(s, &hour) ;
- if (!len || len > 2 || s[len] != ':' || hour > 23)
- strerr_dief1x(100, "invalid time format") ;
- s += len+1 ;
- len = uint0_scan(s, &minute) ;
- if (!len || len != 2 || minute > 59)
- strerr_dief1x(100, "invalid time format") ;
- if (!localtm_from_tai(&tmnow, tain_secp(&STAMP), 1))
- strerr_diefu1sys(111, "break down current time into struct tm") ;
- tmthen = tmnow ;
- tmthen.tm_hour = hour ;
- tmthen.tm_min = minute ;
- if (!tai_from_localtm(&taithen, &tmthen))
- strerr_diefu1sys(111, "assemble broken-down time into tain_t") ;
- if (tai_less(&taithen, tain_secp(&STAMP)))
- {
- add_one_day(&tmthen) ;
- if (!tai_from_localtm(&taithen, &tmthen))
- strerr_diefu1sys(111, "assemble broken-down time into tain_t") ;
- }
- tai_sub(tain_secp(when), &taithen, tain_secp(&STAMP)) ;
- when->nano = 0 ;
-}
-
-static inline void parse_time (tain_t *when, char const *s)
-{
- if (!strcmp(s, "now")) tain_copynow(when) ;
- else if (s[0] == '+')
- {
- unsigned int mins ;
- if (!uint0_scan(s+1, &mins)) dieusage() ;
- tain_addsec_g(when, mins * 60) ;
- }
- else if (strchr(s, ':')) parse_hourmin(when, s) ;
- else
- {
- unsigned int mins ;
- if (!uint0_scan(s, &mins)) dieusage() ;
- tain_addsec_g(when, mins * 60) ;
- }
-}
-
-
- /* shutdown -a: access control */
-
-static inline unsigned char cclass (unsigned char c)
-{
- switch (c)
- {
- case 0 : return 0 ;
- case '\n' : return 1 ;
- case '#' : return 2 ;
- default : return 3 ;
- }
-}
-
-static inline unsigned int parse_authorized_users (char *buf, char const **users, unsigned int max)
-{
- static unsigned char const table[3][4] =
- {
- { 0x03, 0x00, 0x01, 0x12 },
- { 0x03, 0x00, 0x01, 0x01 },
- { 0x23, 0x20, 0x02, 0x02 }
- } ;
- size_t pos = 0 ;
- size_t mark = 0 ;
- unsigned int n = 0 ;
- unsigned int state = 0 ;
- for (; state < 3 ; pos++)
- {
- unsigned char what = table[state][cclass(buf[pos])] ;
- state = what & 3 ;
- if (what & 0x10) mark = pos ;
- if (what & 0x20)
- {
- if (n >= max)
- {
- char fmt[UINT32_MAX] ;
- fmt[uint32_fmt(fmt, AC_MAX)] = 0 ;
- strerr_warnw4x(AC_FILE, " lists more than ", fmt, " authorized users - ignoring the extra ones") ;
- break ;
- }
- buf[pos] = 0 ;
- users[n++] = buf + mark ;
- }
- }
- return n ;
-}
-
-static inline int match_users_with_utmp (char const *const *users, unsigned int n)
-{
- setutxent() ;
- for (;;)
- {
- struct utmpx *utx ;
- errno = 0 ;
- utx = getutxent() ;
- if (!utx) break ;
- if (utx->ut_type != USER_PROCESS) continue ;
- for (unsigned int i = 0 ; i < n ; i++)
- if (!strncmp(utx->ut_user, users[i], UT_NAMESIZE)) goto yes ;
- }
- if (errno) strerr_warnwu1sys("getutxent") ;
- endutxent() ;
- return 0 ;
-
- yes:
- endutxent() ;
- return 1 ;
-}
-
-static inline void access_control (void)
-{
- char buf[AC_BUFSIZE] ;
- char const *users[AC_MAX] ;
- unsigned int n ;
- struct stat st ;
- int fd = open_readb(AC_FILE) ;
- if (fd == -1)
- {
- if (errno == ENOENT) return ;
- strerr_diefu2sys(111, "open ", AC_FILE) ;
- }
- if (fstat(fd, &st) == -1)
- strerr_diefu2sys(111, "stat ", AC_FILE) ;
- if (st.st_size >= AC_BUFSIZE)
- {
- char fmt[UINT32_FMT] ;
- fmt[uint32_fmt(fmt, AC_BUFSIZE - 1)] = 0 ;
- strerr_dief4x(1, AC_FILE, " is too big: it needs to be ", fmt, " bytes or less") ;
- }
- if (allread(fd, buf, st.st_size) < st.st_size)
- strerr_diefu2sys(111, "read ", AC_FILE) ;
- fd_close(fd) ;
- buf[st.st_size] = 0 ;
- n = parse_authorized_users(buf, users, AC_MAX) ;
- if (!n || !match_users_with_utmp(users, n))
- {
- fd = open_append("/dev/console") ;
- if (fd == -1)
- strerr_diefu1sys(111, "open /dev/console") ;
- if (allwrite(fd, AC_MESSAGE, sizeof(AC_MESSAGE) - 1) < sizeof(AC_MESSAGE) - 1)
- strerr_diefu1sys(111, "write to /dev/console") ;
- strerr_dief1x(1, AC_SHORT_MESSAGE) ;
- }
-}
-
-
- /* main */
-
-int main (int argc, char const *const *argv)
-{
- unsigned int gracetime = 0 ;
- int what = 0 ;
- int doactl = 0 ;
- int docancel = 0 ;
- tain_t when ;
- PROG = "shutdown" ;
-
- {
- subgetopt_t l = SUBGETOPT_ZERO ;
- for (;;)
- {
- int opt = subgetopt_r(argc, argv, "hprkafFct:", &l) ;
- if (opt == -1) break ;
- switch (opt)
- {
- case 'h' : what = 1 ; break ;
- case 'p' : what = 2 ; break ;
- case 'r' : what = 3 ; break ;
- case 'k' : what = 4 ; break ;
- case 'a' : doactl = 1 ; break ;
- case 'f' : /* talk to the hand */ break ;
- case 'F' : /* no, the other hand */ break ;
- case 'c' : docancel = 1 ; break ;
- case 't' : if (!uint0_scan(l.arg, &gracetime)) dieusage() ; break ;
- default : strerr_dieusage(100, USAGE) ;
- }
- }
- argc -= l.ind ; argv += l.ind ;
- }
-
- if (geteuid())
- {
- errno = EPERM ;
- strerr_diefu1sys(111, "shutdown") ;
- }
- if (doactl) access_control() ;
- if (!tain_now_g()) strerr_warnw1sys("get current time") ;
- if (docancel)
- {
- if (argv[0]) hpr_wall(argv[0]) ;
- if (!hpr_cancel()) goto err ;
- return 0 ;
- }
- if (!argc) dieusage() ;
- parse_time(&when, argv[0]) ;
- if (argv[1]) hpr_wall(argv[1]) ;
- if (what < 4)
- {
- if (gracetime > 300)
- {
- gracetime = 300 ;
- strerr_warnw1x("delay between SIGTERM and SIGKILL is capped to 300 seconds") ;
- }
- if (!hpr_shutdown(what, &when, gracetime * 1000)) goto err ;
- }
- return 0 ;
-
- err:
- strerr_diefu2sys(111, "write to ", INITCTL) ;
-}
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