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libthread: add threadspawnd

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R=rsc
http://codereview.appspot.com/6742064
This commit is contained in:
Russ Cox 2012-10-22 12:32:09 -04:00
parent 81c2c5e775
commit 9e4b56e764
4 changed files with 28 additions and 6 deletions
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17
src/libthread/exec.c
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@ -12,7 +12,7 @@ execproc(void *v)
Waitmsg *w;
e = v;
pid = _threadspawn(e->fd, e->cmd, e->argv);
pid = _threadspawn(e->fd, e->cmd, e->argv, e->dir);
sendul(e->c, pid);
if(pid > 0){
w = waitfor(pid);
@ -25,7 +25,7 @@ execproc(void *v)
}
int
_runthreadspawn(int *fd, char *cmd, char **argv)
_runthreadspawn(int *fd, char *cmd, char **argv, char *dir)
{
int pid;
Execjob e;
@ -33,6 +33,7 @@ _runthreadspawn(int *fd, char *cmd, char **argv)
e.fd = fd;
e.cmd = cmd;
e.argv = argv;
e.dir = dir;
e.c = chancreate(sizeof(void*), 0);
proccreate(execproc, &e, 65536);
pid = recvul(e.c);
@ -57,7 +58,7 @@ threadwaitchan(void)
}
int
_threadspawn(int fd[3], char *cmd, char *argv[])
_threadspawn(int fd[3], char *cmd, char *argv[], char *dir)
{
int i, n, p[2], pid;
char exitstr[100];
@ -77,6 +78,8 @@ _threadspawn(int fd[3], char *cmd, char *argv[])
return -1;
case 0:
/* can't RFNOTEG - will lose tty */
if(dir != nil )
chdir(dir); /* best effort */
dup2(fd[0], 0);
dup2(fd[1], 1);
dup2(fd[2], 2);
@ -112,7 +115,13 @@ _threadspawn(int fd[3], char *cmd, char *argv[])
int
threadspawn(int fd[3], char *cmd, char *argv[])
{
return _runthreadspawn(fd, cmd, argv);
return _runthreadspawn(fd, cmd, argv, nil);
}
int
threadspawnd(int fd[3], char *cmd, char *argv[], char *dir)
{
return _runthreadspawn(fd, cmd, argv, dir);
}
int

5
src/libthread/threadimpl.h
View file

@ -121,6 +121,7 @@ struct Execjob
int *fd;
char *cmd;
char **argv;
char *dir;
Channel *c;
};
@ -203,8 +204,8 @@ extern void _threadsetproc(Proc*);
extern int _threadlock(Lock*, int, ulong);
extern void _threadunlock(Lock*, ulong);
extern void _pthreadinit(void);
extern int _threadspawn(int*, char*, char**);
extern int _runthreadspawn(int*, char*, char**);
extern int _threadspawn(int*, char*, char**, char*);
extern int _runthreadspawn(int*, char*, char**, char*);
extern void _threadsetupdaemonize(void);
extern void _threaddodaemonize(char*);
extern void _threadpexit(void);