src/libs6/s6_svc_write.c


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/* ISC license. */

#include <errno.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/djbunix.h>
#include <s6/s6-supervise.h>

int s6_svc_write (char const *fifo, char const *data, size_t datalen)
{
  if (datalen)
  {
    int fd = open_write(fifo) ;
    if (fd < 0) switch (errno)
    {
      case ENXIO : return 0 ;
      case ENOENT :
      case ENOTDIR :
      case EISDIR : return -2 ;
      default : return -1 ;
    }
    if (ndelay_off(fd) == -1) return -1 ;
    if (fd_write(fd, data, datalen) == -1)
    {
      fd_close(fd) ;
      return -1 ;
    }
    fd_close(fd) ;
  }
  return 1 ;
}