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/* ISC license. */
#include <sys/uio.h>
#include <stdint.h>
#include <unistd.h>
#include <errno.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/gol.h>
#include <skalibs/types.h>
#include <skalibs/strerr.h>
#include <skalibs/tai.h>
#include <skalibs/siovec.h>
#include <s6/ftrigr.h>
#define USAGE "s6-ftrig-wait [ -t timeout ] fifodir regexp"
enum gola_e
{
GOLA_TIMEOUT,
GOLA_N
} ;
int main (int argc, char const *const *argv)
{
static gol_arg const rgola[GOLA_N] =
{
{ .so = 't', .lo = "timeout", .i = GOLA_TIMEOUT },
} ;
char const *wgola[GOLA_N] = { 0 } ;
tain deadline ;
tain tto = TAIN_INFINITE_RELATIVE ;
ftrigr a = FTRIGR_ZERO ;
uint32_t id ;
unsigned int golc ;
struct iovec v[2] = { [1] = { .iov_base = "\n", .iov_len = 1 } } ;
PROG = "s6-ftrig-wait" ;
golc = gol_main(argc, argv, 0, 0, rgola, GOLA_N, 0, wgola) ;
argc -= golc ; argv += golc ;
if (argc < 2) strerr_dieusage(100, USAGE) ;
if (wgola[GOLA_TIMEOUT])
{
unsigned int t = 0 ;
if (!uint0_scan(wgola[GOLA_TIMEOUT], &t))
strerr_dief1x(100, "timeout must be an unsigned integer") ;
if (t) tain_from_millisecs(&tto, t) ;
}
if (!tain_now_set_stopwatch_g()) strerr_diefu1sys(111, "tain_now") ;
tain_add_g(&deadline, &tto) ;
if (!ftrigr_startf_g(&a, &deadline)) strerr_diefu1sys(111, "ftrigr_startf") ;
if (!ftrigr_subscribe_g(&a, &id, 0, 0, argv[0], argv[1], &deadline))
strerr_diefu4sys(111, "subscribe to ", argv[0], " with regexp ", argv[1]) ;
if (ftrigr_wait_or_g(&a, &id, 1, &v[0], &deadline) == -1)
strerr_diefu2sys((errno == ETIMEDOUT) ? 99 : 111, "match regexp on ", argv[1]) ;
if (allwritev(1, v, 2) < siovec_len(v, 2)) strerr_diefu1sys(111, "write to stdout") ;
_exit(0) ;
}
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