* Licensed under the GPL
*/
-#include <stdio.h>
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-#include <stdlib.h>
-#include <dirent.h>
-#include <signal.h>
-#include <sys/stat.h>
-#include <sys/param.h>
-#include "user.h"
-#include "umid.h"
+#include "asm/errno.h"
#include "init.h"
#include "os.h"
-#include "user_util.h"
-#include "choose-mode.h"
+#include "kern.h"
+#include "linux/kernel.h"
-#define UMID_LEN 64
-#define UML_DIR "~/.uml/"
-
-/* Changed by set_umid and make_umid, which are run early in boot */
-static char umid[UMID_LEN] = { 0 };
-
-/* Changed by set_uml_dir and make_uml_dir, which are run early in boot */
-static char *uml_dir = UML_DIR;
-
-/* Changed by set_umid */
-static int umid_is_random = 1;
+/* Changed by set_umid_arg */
static int umid_inited = 0;
-static int make_umid(int (*printer)(const char *fmt, ...));
-
-static int __init set_umid(char *name, int is_random,
- int (*printer)(const char *fmt, ...))
+static int __init set_umid_arg(char *name, int *add)
{
- if(umid_inited){
- (*printer)("Unique machine name can't be set twice\n");
- return(-1);
- }
+ int err;
- if(strlen(name) > UMID_LEN - 1)
- (*printer)("Unique machine name is being truncated to %d "
- "characters\n", UMID_LEN);
- strlcpy(umid, name, sizeof(umid));
-
- umid_is_random = is_random;
- umid_inited = 1;
- return 0;
-}
+ if(umid_inited)
+ return 0;
-static int __init set_umid_arg(char *name, int *add)
-{
*add = 0;
- return(set_umid(name, 0, printf));
+ err = set_umid(name);
+ if(err == -EEXIST)
+ printf("umid '%s' already in use\n", name);
+ else if(!err)
+ umid_inited = 1;
+
+ return 0;
}
__uml_setup("umid=", set_umid_arg,
" is used for naming the pid file and management console socket.\n\n"
);
-int __init umid_file_name(char *name, char *buf, int len)
-{
- int n;
-
- if(!umid_inited && make_umid(printk)) return(-1);
-
- n = strlen(uml_dir) + strlen(umid) + strlen(name) + 1;
- if(n > len){
- printk("umid_file_name : buffer too short\n");
- return(-1);
- }
-
- sprintf(buf, "%s%s/%s", uml_dir, umid, name);
- return(0);
-}
-
-extern int tracing_pid;
-
-static int __init create_pid_file(void)
-{
- char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
- char pid[sizeof("nnnnn\0")];
- int fd, n;
-
- if(umid_file_name("pid", file, sizeof(file))) return 0;
-
- fd = os_open_file(file, of_create(of_excl(of_rdwr(OPENFLAGS()))),
- 0644);
- if(fd < 0){
- printf("Open of machine pid file \"%s\" failed: %s\n",
- file, strerror(-fd));
- return 0;
- }
-
- sprintf(pid, "%d\n", os_getpid());
- n = os_write_file(fd, pid, strlen(pid));
- if(n != strlen(pid))
- printf("Write of pid file failed - err = %d\n", -n);
- os_close_file(fd);
- return 0;
-}
-
-static int actually_do_remove(char *dir)
-{
- DIR *directory;
- struct dirent *ent;
- int len;
- char file[256];
-
- directory = opendir(dir);
- if(directory == NULL){
- printk("actually_do_remove : couldn't open directory '%s', "
- "errno = %d\n", dir, errno);
- return(1);
- }
- while((ent = readdir(directory)) != NULL){
- if(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, ".."))
- continue;
- len = strlen(dir) + sizeof("/") + strlen(ent->d_name) + 1;
- if(len > sizeof(file)){
- printk("Not deleting '%s' from '%s' - name too long\n",
- ent->d_name, dir);
- continue;
- }
- sprintf(file, "%s/%s", dir, ent->d_name);
- if(unlink(file) < 0){
- printk("actually_do_remove : couldn't remove '%s' "
- "from '%s', errno = %d\n", ent->d_name, dir,
- errno);
- return(1);
- }
- }
- if(rmdir(dir) < 0){
- printk("actually_do_remove : couldn't rmdir '%s', "
- "errno = %d\n", dir, errno);
- return(1);
- }
- return(0);
-}
-
-void remove_umid_dir(void)
-{
- char dir[strlen(uml_dir) + UMID_LEN + 1];
- if(!umid_inited) return;
-
- sprintf(dir, "%s%s", uml_dir, umid);
- actually_do_remove(dir);
-}
-
-char *get_umid(int only_if_set)
-{
- if(only_if_set && umid_is_random) return(NULL);
- return(umid);
-}
-
-int not_dead_yet(char *dir)
-{
- char file[strlen(uml_dir) + UMID_LEN + sizeof("/pid\0")];
- char pid[sizeof("nnnnn\0")], *end;
- int dead, fd, p, n;
-
- sprintf(file, "%s/pid", dir);
- dead = 0;
- fd = os_open_file(file, of_read(OPENFLAGS()), 0);
- if(fd < 0){
- if(fd != -ENOENT){
- printk("not_dead_yet : couldn't open pid file '%s', "
- "err = %d\n", file, -fd);
- return(1);
- }
- dead = 1;
- }
- if(fd > 0){
- n = os_read_file(fd, pid, sizeof(pid));
- if(n < 0){
- printk("not_dead_yet : couldn't read pid file '%s', "
- "err = %d\n", file, -n);
- return(1);
- }
- p = strtoul(pid, &end, 0);
- if(end == pid){
- printk("not_dead_yet : couldn't parse pid file '%s', "
- "errno = %d\n", file, errno);
- dead = 1;
- }
- if(((kill(p, 0) < 0) && (errno == ESRCH)) ||
- (p == CHOOSE_MODE(tracing_pid, os_getpid())))
- dead = 1;
- }
- if(!dead) return(1);
- return(actually_do_remove(dir));
-}
-
-static int __init set_uml_dir(char *name, int *add)
-{
- if((strlen(name) > 0) && (name[strlen(name) - 1] != '/')){
- uml_dir = malloc(strlen(name) + 2);
- if(uml_dir == NULL){
- printf("Failed to malloc uml_dir - error = %d\n",
- errno);
- uml_dir = name;
- /* Return 0 here because do_initcalls doesn't look at
- * the return value.
- */
- return(0);
- }
- sprintf(uml_dir, "%s/", name);
- }
- else uml_dir = name;
- return(0);
-}
-
-static int __init make_uml_dir(void)
-{
- char dir[MAXPATHLEN + 1] = { '\0' };
- int len;
-
- if(*uml_dir == '~'){
- char *home = getenv("HOME");
-
- if(home == NULL){
- printf("make_uml_dir : no value in environment for "
- "$HOME\n");
- exit(1);
- }
- strlcpy(dir, home, sizeof(dir));
- uml_dir++;
- }
- len = strlen(dir);
- strncat(dir, uml_dir, sizeof(dir) - len);
- len = strlen(dir);
- if((len > 0) && (len < sizeof(dir) - 1) && (dir[len - 1] != '/')){
- dir[len] = '/';
- dir[len + 1] = '\0';
- }
-
- uml_dir = malloc(strlen(dir) + 1);
- if(uml_dir == NULL){
- printf("make_uml_dir : malloc failed, errno = %d\n", errno);
- exit(1);
- }
- strcpy(uml_dir, dir);
-
- if((mkdir(uml_dir, 0777) < 0) && (errno != EEXIST)){
- printf("Failed to mkdir %s: %s\n", uml_dir, strerror(errno));
- return(-1);
- }
- return 0;
-}
-
-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);
-}
-
-__uml_setup("uml_dir=", set_uml_dir,
-"uml_dir=<directory>\n"
-" The location to place the pid and umid files.\n\n"
-);
-
-static int __init make_umid_setup(void)
-{
- /* one function with the ordering we need ... */
- make_uml_dir();
- make_umid(printf);
- return create_pid_file();
-}
-__uml_postsetup(make_umid_setup);
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
git://git.onelab.eu / linux-2.6.git / blobdiff