s6

Mirror/fork of https://skarnet.org/software/s6/
git clone https://ccx.te2000.cz/git/s6
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s6-svscanctl.c (1331B)

      1 /* ISC license. */
      2 
      3 #include <skalibs/sgetopt.h>
      4 #include <skalibs/strerr.h>
      5 #include <s6/supervise.h>
      6 
      7 #define USAGE "s6-svscanctl [ -zabhitqnN ] svscandir"
      8 #define dieusage() strerr_dieusage(100, USAGE)
      9 
     10 #define DATASIZE 64
     11 
     12 int main (int argc, char const *const *argv)
     13 {
     14   char data[DATASIZE] ;
     15   unsigned int datalen = 0 ;
     16   PROG = "s6-svscanctl" ;
     17   {
     18     subgetopt l = SUBGETOPT_ZERO ;
     19     for (;;)
     20     {
     21       int opt = subgetopt_r(argc, argv, "phratszbnNiq0678", &l) ;
     22       if (opt == -1) break ;
     23       switch (opt)
     24       {
     25         case 'z' :
     26         case 'a' :
     27         case 'b' :
     28         case 'h' :
     29         case 'i' :
     30         case 't' :
     31         case 'q' :
     32         case 'n' :
     33         case 'N' :
     34         {
     35           if (datalen >= DATASIZE) strerr_dief1x(100, "too many commands") ;
     36           data[datalen++] = opt ;
     37           break ;
     38         }
     39         default : dieusage() ;
     40       }
     41     }
     42     argc -= l.ind ; argv += l.ind ;
     43   }
     44   if (!argc) dieusage() ;
     45 
     46   switch (s6_svc_writectl(argv[0], S6_SVSCAN_CTLDIR, data, datalen))
     47   {
     48     case -1 : strerr_diefu2sys(111, "control ", argv[0]) ;
     49     case -2 : strerr_dief3sys(100, "something is wrong with the ", argv[0], "/" S6_SVSCAN_CTLDIR " directory. errno reported") ;
     50     case 0 : strerr_diefu3x(100, "control ", argv[0], ": supervisor not listening") ;
     51   }
     52   return 0 ;
     53 }