// genrun is the generic run implementation.
static void
genrun(Buf *b, char *dir, int mode, Vec *argv, int wait)
{
int i, p[2], pid;
Buf b1, cmd;
char *q;
while(nbg >= maxnbg)
bgwait1();
binit(&b1);
binit(&cmd);
if(!isabs(argv->p[0])) {
bpathf(&b1, "/bin/%s", argv->p[0]);
free(argv->p[0]);
argv->p[0] = xstrdup(bstr(&b1));
}
// Generate a copy of the command to show in a log.
// Substitute $WORK for the work directory.
for(i=0; i<argv->len; i++) {
if(i > 0)
bwritestr(&cmd, " ");
q = argv->p[i];
if(workdir != nil && hasprefix(q, workdir)) {
bwritestr(&cmd, "$WORK");
q += strlen(workdir);
}
bwritestr(&cmd, q);
}
if(vflag > 1)
errprintf("%s\n", bstr(&cmd));
if(b != nil) {
breset(b);
if(pipe(p) < 0)
fatal("pipe");
}
switch(pid = fork()) {
case -1:
fatal("fork");
case 0:
if(b != nil) {
close(0);
close(p[0]);
dup(p[1], 1);
dup(p[1], 2);
if(p[1] > 2)
close(p[1]);
}
if(dir != nil) {
if(chdir(dir) < 0) {
fprint(2, "chdir: %r\n");
_exits("chdir");
}
}
vadd(argv, nil);
exec(argv->p[0], argv->p);
fprint(2, "%s\n", bstr(&cmd));
fprint(2, "exec: %r\n");
_exits("exec");
}
if(b != nil) {
close(p[1]);
breadfrom(b, p[0]);
close(p[0]);
}
if(nbg < 0)
fatal("bad bookkeeping");
bg[nbg].pid = pid;
bg[nbg].mode = mode;
bg[nbg].cmd = btake(&cmd);
bg[nbg].b = b;
nbg++;
if(wait)
bgwait();
bfree(&cmd);
bfree(&b1);
}
// bgwait waits for all the background jobs.
void
bgwait(void)
{
while(nbg > 0)
bgwait1();
}
// genrun is the generic run implementation.
static void
genrun(Buf *b, char *dir, int mode, Vec *argv, int wait)
{
int i, p[2], pid;
Buf cmd;
char *q;
while(nbg >= maxnbg)
bgwait1();
// Generate a copy of the command to show in a log.
// Substitute $WORK for the work directory.
binit(&cmd);
for(i=0; i<argv->len; i++) {
if(i > 0)
bwritestr(&cmd, " ");
q = argv->p[i];
if(workdir != nil && hasprefix(q, workdir)) {
bwritestr(&cmd, "$WORK");
q += strlen(workdir);
}
bwritestr(&cmd, q);
}
//if(vflag > 1)
xprintf("%s\n", bstr(&cmd));
if(b != nil) {
breset(b);
if(pipe(p) < 0)
fatal("pipe: %s", strerror(errno));
}
switch(pid = fork()) {
case -1:
fatal("fork: %s", strerror(errno));
case 0:
if(b != nil) {
close(0);
close(p[0]);
dup2(p[1], 1);
dup2(p[1], 2);
if(p[1] > 2)
close(p[1]);
}
if(dir != nil) {
if(chdir(dir) < 0) {
fprintf(stderr, "chdir %s: %s\n", dir, strerror(errno));
_exit(1);
}
}
vadd(argv, nil);
execvp(argv->p[0], argv->p);
fprintf(stderr, "%s\n", bstr(&cmd));
fprintf(stderr, "exec %s: %s\n", argv->p[0], strerror(errno));
_exit(1);
}
if(b != nil) {
close(p[1]);
breadfrom(b, p[0]);
close(p[0]);
}
if(nbg < 0)
fatal("bad bookkeeping");
bg[nbg].pid = pid;
bg[nbg].mode = mode;
bg[nbg].cmd = btake(&cmd);
bg[nbg].b = b;
nbg++;
if(wait)
bgwait();
bfree(&cmd);
}
