diff options
| -rw-r--r-- | arch/um/os-Linux/umid.c | 53 |
1 files changed, 37 insertions, 16 deletions
diff --git a/arch/um/os-Linux/umid.c b/arch/um/os-Linux/umid.c index d5811710126e..48092b95c8ab 100644 --- a/arch/um/os-Linux/umid.c +++ b/arch/um/os-Linux/umid.c @@ -67,32 +67,53 @@ err: return err; } -static int actually_do_remove(char *dir) +/* + * Unlinks the files contained in @dir and then removes @dir. + * Doesn't handle directory trees, so it's not like rm -rf, but almost such. We + * ignore ENOENT errors for anything (they happen, strangely enough - possibly due + * to races between multiple dying UML threads). + */ +static int remove_files_and_dir(char *dir) { DIR *directory; struct dirent *ent; int len; char file[256]; + int ret; directory = opendir(dir); - if(directory == NULL) - return -errno; + if (directory == NULL) { + if (errno != ENOENT) + return -errno; + else + return 0; + } - while((ent = readdir(directory)) != NULL){ - if(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..")) + 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)) - return -E2BIG; + if (len > sizeof(file)) { + ret = -E2BIG; + goto out; + } sprintf(file, "%s/%s", dir, ent->d_name); - if(unlink(file) < 0) - return -errno; + if (unlink(file) < 0 && errno != ENOENT) { + ret = -errno; + goto out; + } } - if(rmdir(dir) < 0) - return -errno; - return 0; + if (rmdir(dir) < 0 && errno != ENOENT) { + ret = -errno; + goto out; + } + + ret = 0; +out: + closedir(directory); + return ret; } /* This says that there isn't already a user of the specified directory even if @@ -172,9 +193,9 @@ static int umdir_take_if_dead(char *dir) if (is_umdir_used(dir)) return -EEXIST; - ret = actually_do_remove(dir); + ret = remove_files_and_dir(dir); if (ret) { - printk("is_umdir_used - actually_do_remove failed with " + printk("is_umdir_used - remove_files_and_dir failed with " "err = %d\n", ret); } return ret; @@ -354,9 +375,9 @@ static void remove_umid_dir(void) char dir[strlen(uml_dir) + UMID_LEN + 1], err; sprintf(dir, "%s%s", uml_dir, umid); - err = actually_do_remove(dir); + err = remove_files_and_dir(dir); if(err) - printf("remove_umid_dir - actually_do_remove failed with " + printf("remove_umid_dir - remove_files_and_dir failed with " "err = %d\n", err); } |