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/* ISC license. */
#include <skalibs/nonposix.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <skalibs/types.h>
#include <skalibs/sgetopt.h>
#include <skalibs/strerr.h>
#include <skalibs/nsig.h>
#include <skalibs/sig.h>
#include <skalibs/djbunix.h>
#include <skalibs/exec.h>
#include <s6/config.h>
#include <s6/supervise.h>
#define USAGE "s6-svc [ -wu | -wU | -wd | -wD | -wr | -wR ] [ -T timeout ] [ -s signal | -abqhkti12pcyrPCK ] [ -oduDUxOQ ] servicedir"
#define dieusage() strerr_dieusage(100, USAGE)
#define DATASIZE 63
int main (int argc, char const *const *argv)
{
static char const cmdsig[NSIG] =
{
[SIGALRM] = 'a',
[SIGABRT] = 'b',
[SIGQUIT] = 'q',
[SIGHUP] = 'h',
[SIGKILL] = 'k',
[SIGTERM] = 't',
[SIGINT] = 'i',
[SIGUSR1] = '1',
[SIGUSR2] = '2',
[SIGSTOP] = 'p',
[SIGCONT] = 'c',
[SIGWINCH] = 'y'
} ;
size_t len ;
unsigned int datalen = 1 ;
unsigned int timeout = 0 ;
char data[DATASIZE+1] = "-" ;
char updown[3] = "-\0" ;
PROG = "s6-svc" ;
{
subgetopt l = SUBGETOPT_ZERO ;
for (;;)
{
int opt = subgetopt_r(argc, argv, "s:abqhkti12pcyrPCKoduDUxOQT:w:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 's' :
{
int sig ;
if (!sig0_scan(l.arg, &sig)) strerr_dief2x(100, "invalid signal: ", l.arg) ;
if (!cmdsig[sig]) strerr_dief2x(100, l.arg, " is not in the list of user-available signals") ;
opt = cmdsig[sig] ;
}
case 'a' :
case 'b' :
case 'q' :
case 'h' :
case 'k' :
case 't' :
case 'i' :
case '1' :
case '2' :
case 'p' :
case 'c' :
case 'y' :
case 'r' :
case 'P' :
case 'C' :
case 'K' :
case 'o' :
case 'd' :
case 'u' :
case 'D' :
case 'U' :
case 'x' :
case 'O' :
case 'Q' :
{
if (datalen >= DATASIZE) strerr_dief1x(100, "too many commands") ;
data[datalen++] = opt ;
break ;
}
case 'T' : if (!uint0_scan(l.arg, &timeout)) dieusage() ; break ;
case 'w' :
{
if (!memchr("dDuUrR", l.arg[0], 6)) dieusage() ;
updown[1] = l.arg[0] ;
break ;
}
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
}
if (!argc) dieusage() ;
if (argc > 1) strerr_warnw1x("ignoring extra arguments") ;
len = strlen(argv[0]) ;
if (!len) strerr_dief1x(100, "invalid service path") ;
if (updown[1] == 'U' || updown[1] == 'R')
{
char fn[len + 17] ;
memcpy(fn, argv[0], len) ;
memcpy(fn + len, "/notification-fd", 17) ;
if (access(fn, F_OK) < 0)
{
if (errno != ENOENT) strerr_diefu2sys(111, "access ", fn) ;
updown[1] = updown[1] == 'U' ? 'u' : 'r' ;
strerr_warnw2x(fn, " not present - ignoring request for readiness notification") ;
}
}
if (updown[1])
{
char const *newargv[11] ;
unsigned int m = 0 ;
char fmt[UINT_FMT] ;
newargv[m++] = datalen > 1 ? S6_BINPREFIX "s6-svlisten1" : S6_BINPREFIX "s6-svwait" ;
newargv[m++] = updown ;
if (timeout)
{
fmt[uint_fmt(fmt, timeout)] = 0 ;
newargv[m++] = "-t" ;
newargv[m++] = fmt ;
}
newargv[m++] = "--" ;
newargv[m++] = argv[0] ;
if (datalen > 1)
{
newargv[m++] = S6_BINPREFIX "s6-svc" ;
newargv[m++] = data ;
newargv[m++] = "--" ;
newargv[m++] = argv[0] ;
}
newargv[m++] = 0 ;
xexec(newargv) ;
}
else switch (s6_svc_writectl(argv[0], S6_SUPERVISE_CTLDIR, data + 1, datalen - 1))
{
case -1 : strerr_diefu2sys(111, "control ", argv[0]) ;
case -2 : strerr_dief3sys(100, "something is wrong with the ", argv[0], "/" S6_SUPERVISE_CTLDIR " directory") ;
case 0 : strerr_diefu3x(100, "control ", argv[0], ": supervisor not listening") ;
}
return 0 ;
}
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