static int __init make_umid(int (*printer)(const char *fmt, ...))
{
int fd, err;
char tmp[strlen(uml_dir) + UMID_LEN + 1];
strlcpy(tmp, uml_dir, sizeof(tmp));
if(!umid_inited){
strcat(tmp, "XXXXXX");
fd = mkstemp(tmp);
if(fd < 0){
(*printer)("make_umid - mkstemp(%s) failed: %s\n",
tmp,strerror(errno));
return(1);
}
os_close_file(fd);
/* There's a nice tiny little race between this unlink and
* the mkdir below. It'd be nice if there were a mkstemp
* for directories.
*/
unlink(tmp);
set_umid(&tmp[strlen(uml_dir)], 1, printer);
}
sprintf(tmp, "%s%s", uml_dir, umid);
err = mkdir(tmp, 0777);
if(err < 0){
if(errno == EEXIST){
if(not_dead_yet(tmp)){
(*printer)("umid '%s' is in use\n", umid);
return(-1);
}
err = mkdir(tmp, 0777);
}
}
if(err < 0){
(*printer)("Failed to create %s - errno = %d\n", umid, errno);
return(-1);
}
return(0);
}
int __init make_umid(void)
{
int fd, err;
char tmp[256];
if(umid_setup)
return 0;
make_uml_dir();
if(*umid == '\0'){
strlcpy(tmp, uml_dir, sizeof(tmp));
strlcat(tmp, "XXXXXX", sizeof(tmp));
fd = mkstemp(tmp);
if(fd < 0){
printk("make_umid - mkstemp(%s) failed: %s\n",
tmp, strerror(errno));
err = -errno;
goto err;
}
close(fd);
set_umid(&tmp[strlen(uml_dir)]);
/* There's a nice tiny little race between this unlink and
* the mkdir below. It'd be nice if there were a mkstemp
* for directories.
*/
if(unlink(tmp)){
err = -errno;
goto err;
}
}
snprintf(tmp, sizeof(tmp), "%s%s", uml_dir, umid);
err = mkdir(tmp, 0777);
if(err < 0){
err = -errno;
if(err != -EEXIST)
goto err;
/* 1 -> this umid is already in use
* < 0 -> we couldn't remove the umid directory
* In either case, we can't use this umid, so return -EEXIST.
*/
if(not_dead_yet(tmp) != 0)
goto err;
err = mkdir(tmp, 0777);
}
if(err){
err = -errno;
printk("Failed to create '%s' - err = %d\n", umid, -errno);
goto err;
}
umid_setup = 1;
create_pid_file();
err = 0;
err:
return err;
}
