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restore current directory after threadexec.

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this is dodgy.
This commit is contained in:
rsc 2004-05-15 23:13:42 +00:00
parent 50e1783a7e
commit bf27f58721
1 changed files with 48 additions and 7 deletions
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55
src/cmd/acme/exec.c
View file

@ -1280,7 +1280,10 @@ runproc(void *argvp)
int sfd[3];
int pipechar;
char buf[512];
int olddir;
int ret;
//static void *parg[2];
char *rcarg[4];
void **argv;
Fsys *fs;
@ -1317,11 +1320,6 @@ runproc(void *argvp)
pipechar = *t++;
c->iseditcmd = iseditcmd;
c->text = s;
if(rdir != nil){
dir = runetobyte(rdir, ndir);
chdir(dir); /* ignore error: probably app. window */
free(dir);
}
if(newns){
nincl = 0;
incl = nil;
@ -1431,7 +1429,30 @@ runproc(void *argvp)
av[ac++] = arg;
av[ac] = nil;
c->av = av;
threadexec(cpid, sfd, av[0], av);
/*
* clumsy -- we're not running in a separate thread
* so we have to save the current directory and put
* it back when we're done. if this gets to be a regular
* thing we could change threadexec to take a directory too.
*/
olddir = -1;
if(rdir != nil){
olddir = open(".", OREAD);
dir = runetobyte(rdir, ndir);
chdir(dir); /* ignore error: probably app. window */
free(dir);
}
ret = threadspawn(sfd, av[0], av);
if(olddir >= 0){
fchdir(olddir);
close(olddir);
}
if(ret >= 0){
if(cpid)
sendul(cpid, ret);
threadexits("");
}
/* libthread uses execvp so no need to do this */
#if 0
e = av[0];
@ -1474,7 +1495,27 @@ Hard:
c->text = news;
}
}
threadexecl(cpid, sfd, "rc", "rc", "-c", t, nil);
olddir = -1;
if(rdir != nil){
olddir = open(".", OREAD);
dir = runetobyte(rdir, ndir);
chdir(dir); /* ignore error: probably app. window */
free(dir);
}
rcarg[0] = "rc";
rcarg[1] = "-c";
rcarg[2] = t;
rcarg[3] = nil;
ret = threadspawn(sfd, rcarg[0], rcarg);
if(olddir >= 0){
fchdir(olddir);
close(olddir);
}
if(ret >= 0){
if(cpid)
sendul(cpid, ret);
threadexits("");
}
warning(nil, "exec rc: %r\n");
Fail: