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#include "tra.h"
#include <sys/param.h>
#include <signal.h>
char*
trapath(char *name)
{
char *home;
if(name[0] == '/'
|| (name[0] == '.' && name[1] == '/')
|| (name[0] == '.' && name[2] == '.' && name[3] == '/'))
return estrdup(name);
home = getenv("HOME");
if(home == nil)
sysfatal("cannot read user name");
return esmprint("%s/.tra/%s", home, name);
}
Replica*
dialreplica(char *name)
{
char *bin;
int p[2], q[2];
bin = trapath(name);
if(access(bin, 1) < 0)
sysfatal("access %s: %r", bin);
if(pipe(p) < 0 || pipe(q) < 0)
sysfatal("pipe: %r");
signal(SIGCHLD, SIG_IGN);
switch(fork()){
case -1:
sysfatal("rfork dialreplica: %r");
case 0:
close(p[0]);
close(q[1]);
dup2(q[0], 0);
dup2(p[1], 1);
execl(bin, name, nil);
sysfatal("exec %s: %r", bin);
default:
close(q[0]);
close(p[1]);
break;
}
return fd2replica(p[0], q[1]);
}
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