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/* ISC license. */
#include <unistd.h>
#include <skalibs/strerr2.h>
#include <skalibs/iobuffer.h>
#include <skalibs/djbunix.h>
#define USAGE "seekablepipe tempfile prog..."
#define N 8192
int main (int argc, char const *const *argv, char const *const *envp)
{
iobuffer b ;
int fdr, fdw ;
int r ;
PROG = "seekablepipe" ;
if (argc < 3) strerr_dieusage(100, USAGE) ;
fdw = open_trunc(argv[1]) ;
if (fdw < 0)
strerr_diefu2sys(111, "create temporary ", argv[1]) ;
fdr = open_readb(argv[1]) ;
if (fdr < 0)
strerr_diefu3sys(111, "open ", argv[1], " for reading") ;
if (unlink(argv[1]) < 0)
strerr_diefu2sys(111, "unlink ", argv[1]) ;
if (ndelay_off(fdw) < 0)
strerr_diefu1sys(111, "set fdw blocking") ;
if (!iobuffer_init(&b, 0, fdw))
strerr_diefu1sys(111, "iobuffer_init") ;
while ((r = iobuffer_fill(&b)) > 0)
if (!iobuffer_flush(&b))
strerr_diefu2sys(111, "write to ", argv[1]) ;
if (r < 0) strerr_diefu1sys(111, "read from stdin") ;
iobuffer_finish(&b) ;
fd_close(fdw) ;
if (fd_move(0, fdr) < 0)
strerr_diefu1sys(111, "move fdr to stdin") ;
xpathexec_run(argv[2], argv+2, envp) ;
}
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