diff options
Diffstat (limited to 'mdk-stage1/insmod-modutils/util/xftw.c')
| -rw-r--r-- | mdk-stage1/insmod-modutils/util/xftw.c | 422 |
1 files changed, 0 insertions, 422 deletions
diff --git a/mdk-stage1/insmod-modutils/util/xftw.c b/mdk-stage1/insmod-modutils/util/xftw.c deleted file mode 100644 index fe764a63c..000000000 --- a/mdk-stage1/insmod-modutils/util/xftw.c +++ /dev/null @@ -1,422 +0,0 @@ -/* - * modutils specific implementation of ftw(). - * - * Copyright 2000: - * Keith Owens <kaos@ocs.com.au> August 2000 - * - * This file is part of the Linux modutils. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software Foundation, - * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -/* - modutils requires special processing during the file tree walk - of /lib/modules/<version> and any paths that the user specifies. - The standard ftw() does a blind walk of all paths and can end - up following the build symlink down the kernel source tree. - Although nftw() has the option to get more control such as not - automatically following symbolic links, even that is not enough - for modutils. The requirements are: - - Paths must be directories or symlinks to directories. - - Each directory is read and sorted into alphabetical order - before processing. - - A directory is type 1 iff it was specified on a path statement - (either explicit or default) and the directory contains a - subdirectory with one of the known names and the directory name - does not end with "/kernel". Otherwise it is type 2. - - In a type 1 directory, walk the kernel subdirectory if it exists, - then the old known names in their historical order then any - remaining directory entries in alphabetical order and finally any - non-directory entries in alphabetical order. - - Entries in a type 1 directory are filtered against the "prune" - list. A type 1 directory can contain additional files which - are not modules nor symlinks to modules. The prune list skips - known additional files, if a distribution wants to store - additional text files in the top level directory they should be - added to the prune list. - - A type 2 directory must contain only modules or symlinks to - modules. They are processed in alphabetical order, without - pruning. Symlinks to directories are an error in type 2 - directories. - - The user function is not called for type 1 directories, nor for - pruned entries. It is called for type 2 directories and their - contents. It is also called for any files left in a type 1 - directory after pruning and processing type 2 subdirectories. - The user function never sees symlinks, they are resolved before - calling the function. - - Why have different directory types? The original file tree - walk was not well defined. Some users specified each directory - individually, others just pointed at the top level directory. - Either version worked until the "build" symlink was added. Now - users who specify the top level directory end up running the - entire kernel source tree looking for modules, not nice. We - cannot just ignore symlinks because pcmcia uses symlinks to - modules for backwards compatibility. - - Type 1 is when a user specifies the top level directory which needs - special processing, type 2 is individual subdirectories. But the - only way to tell the difference is by looking at the contents. The - "/kernel" directory introduced in 2.3.12 either contains nothing - (old make modules_install) or contains all the kernel modules using - the same tree structure as the source. Because "/kernel" can - contain old names but is really a type 2 directory, it is detected - as a special case. - */ - -#include <dirent.h> -#include <errno.h> -#include <limits.h> -#include <malloc.h> -#include <stdlib.h> -#include <string.h> -#include <sys/stat.h> - -#include "util.h" -#include "config.h" - -extern char *tbpath[]; - -extern OPT_LIST *prune_list; -extern int n_prune_list; - -extern char *tbtype[]; - -struct xftw_dirent { - struct stat statbuf; - char *name; - char *fullname; -}; - -#define XFTW_MAXDEPTH 64 /* Maximum directory depth handled */ - -typedef struct { - struct xftw_dirent *contents; - int size; - int used; -} xftw_tree_t; - -static xftw_tree_t tree[XFTW_MAXDEPTH]; - -/* Free all data for one tree level */ -static void xftw_free_tree(int depth) -{ - int i; - xftw_tree_t *t = tree+depth; - for (i = 0; i < t->size; ++i) { - free(t->contents[i].name); - free(t->contents[i].fullname); - } - free(t->contents); - t->contents = NULL; - t->size = 0; - t->used = 0; -} - -/* Increment dirents used at this depth, resizing if necessary */ -static void xftw_add_dirent(int depth) -{ - xftw_tree_t *t = tree+depth; - int i, size = t->size; - if (++t->used < size) - return; - size += 10; /* arbitrary increment */ - t->contents = xrealloc(t->contents, size*sizeof(*(t->contents))); - for (i = t->size; i < size; ++i) { - memset(&(t->contents[i].statbuf), 0, sizeof(t->contents[i].statbuf)); - t->contents[i].name = NULL; - t->contents[i].fullname = NULL; - } - t->size = size; -} - -/* Concatenate directory name and entry name into one string. - * Note: caller must free result or leak. - */ -static char *xftw_dir_name(const char *directory, const char *entry) -{ - int i = strlen(directory); - char *name; - if (entry) - i += strlen(entry); - i += 2; - name = xmalloc(i); - strcpy(name, directory); /* safe, xmalloc */ - if (*directory && entry) - strcat(name, "/"); /* safe, xmalloc */ - if (entry) - strcat(name, entry); /* safe, xmalloc */ - return(name); -} - -/* Call the user function for a directory entry */ -static int xftw_do_name(const char *directory, const char *entry, struct stat *sb, xftw_func_t funcptr) -{ - int ret = 0; - char *name = xftw_dir_name(directory, entry); - - if (S_ISLNK(sb->st_mode)) { - char real[PATH_MAX], *newname; - verbose("resolving %s symlink to ", name); - if (!(newname = realpath(name, real))) { - if (errno == ENOENT) { - verbose("%s: does not exist, dangling symlink ignored\n", real); - goto cleanup; - } - perror("... failed"); - goto cleanup; - } - verbose("%s ", newname); - if (lstat(newname, sb)) { - error("lstat on %s failed ", newname); - perror(""); - goto cleanup; - } - free(name); - name = xstrdup(newname); - } - - if (!S_ISREG(sb->st_mode) && - !S_ISDIR(sb->st_mode)) { - error("%s is not plain file nor directory\n", name); - goto cleanup; - } - - verbose("user function %s\n", name); - ret = (*funcptr)(name, sb); -cleanup: - free(name); - return(ret); -} - -/* Sort directory entries into alphabetical order */ -static int xftw_sortdir(const void *a, const void *b) -{ - return(strcmp(((struct xftw_dirent *)a)->name, ((struct xftw_dirent *)b)->name)); -} - -/* Read a directory and sort it, ignoring "." and ".." */ -static int xftw_readdir(const char *directory, int depth) -{ - DIR *d; - struct dirent *ent; - verbose("xftw_readdir %s\n", directory); - if (!(d = opendir(directory))) { - perror(directory); - return(1); - } - while ((ent = readdir(d))) { - char *name; - struct xftw_dirent *f; - if (strcmp(ent->d_name, ".") == 0 || - strcmp(ent->d_name, "..") == 0) - continue; - name = xftw_dir_name(directory, ent->d_name); - xftw_add_dirent(depth); - f = tree[depth].contents+tree[depth].used-1; - f->name = xstrdup(ent->d_name); - f->fullname = name; /* do not free name, it is in use */ - if (lstat(name, &(f->statbuf))) { - perror(name); - return(1); - } - } - closedir(d); - qsort(tree[depth].contents, tree[depth].used, sizeof(*(tree[0].contents)), &xftw_sortdir); - return(0); -} - -/* Process a type 2 directory */ -int xftw_type2(const char *directory, const char *entry, int depth, xftw_func_t funcptr) -{ - int ret, i; - xftw_tree_t *t = tree+depth; - struct stat statbuf; - char *dirname = xftw_dir_name(directory, entry); - - verbose("type 2 %s\n", dirname); - if (depth > XFTW_MAXDEPTH) { - error("xftw_type2 exceeded maxdepth\n"); - ret = 1; - goto cleanup; - } - if ((ret = xftw_readdir(dirname, depth))) - goto cleanup; - - t = tree+depth; - /* user function sees type 2 directories */ - if ((ret = lstat(dirname, &statbuf)) || - (ret = xftw_do_name("", dirname, &statbuf, funcptr))) - goto cleanup; - - /* user sees all contents of type 2 directory, no pruning */ - for (i = 0; i < t->used; ++i) { - struct xftw_dirent *c = t->contents+i; - if (S_ISLNK(c->statbuf.st_mode)) { - if (!stat(c->name, &(c->statbuf))) { - if (S_ISDIR(c->statbuf.st_mode)) { - error("symlink to directory is not allowed, %s ignored\n", c->name); - *(c->name) = '\0'; /* ignore it */ - } - } - } - if (!*(c->name)) - continue; - if (S_ISDIR(c->statbuf.st_mode)) { - /* recursion is the curse of the programming classes */ - ret = xftw_type2(dirname, c->name, depth+1, funcptr); - if (ret) - goto cleanup; - } - else if ((ret = xftw_do_name(dirname, c->name, &(c->statbuf), funcptr))) - goto cleanup; - *(c->name) = '\0'; /* processed */ - } - - ret = 0; -cleanup: - free(dirname); - return(ret); -} - -/* Only external visible function. Decide on the type of directory and - * process accordingly. - */ -int xftw(const char *directory, xftw_func_t funcptr) -{ - struct stat statbuf; - int ret, i, j, type; - xftw_tree_t *t; - struct xftw_dirent *c; - - verbose("xftw starting at %s ", directory); - if (lstat(directory, &statbuf)) { - verbose("lstat on %s failed\n", directory); - return(0); - } - if (S_ISLNK(statbuf.st_mode)) { - char real[PATH_MAX]; - verbose("resolving symlink to "); - if (!(directory = realpath(directory, real))) { - if (errno == ENOENT) { - verbose("%s: does not exist, dangling symlink ignored\n", real); - return(0); - } - perror("... failed"); - return(-1); - } - verbose("%s ", directory); - if (lstat(directory, &statbuf)) { - error("lstat on %s failed ", directory); - perror(""); - return(-1); - } - } - if (!S_ISDIR(statbuf.st_mode)) { - error("%s is not a directory\n", directory); - return(-1); - } - verbose("\n"); - - /* All returns after this point must be via cleanup */ - - if ((ret = xftw_readdir(directory, 0))) - goto cleanup; - - t = tree; /* depth 0 */ - type = 2; - for (i = 0 ; type == 2 && i < t->used; ++i) { - c = t->contents+i; - for (j = 0; tbtype[j]; ++j) { - if (strcmp(c->name, tbtype[j]) == 0 && - S_ISDIR(c->statbuf.st_mode)) { - const char *p = directory + strlen(directory) - 1; - if (*p == '/') - --p; - if (p - directory >= 6 && strncmp(p-6, "/kernel", 7) == 0) - continue; /* "/kernel" path is a special case, type 2 */ - type = 1; /* known subdirectory */ - break; - } - } - } - - if (type == 1) { - OPT_LIST *p; - /* prune entries in type 1 directories only */ - for (i = 0 ; i < t->used; ++i) { - for (p = prunelist; p->name; ++p) { - c = t->contents+i; - if (strcmp(p->name, c->name) == 0) { - verbose("pruned %s\n", c->name); - *(c->name) = '\0'; /* ignore */ - } - } - } - /* run known subdirectories first in historical order, "kernel" is now top of list */ - for (i = 0 ; i < t->used; ++i) { - c = t->contents+i; - for (j = 0; tbtype[j]; ++j) { - if (*(c->name) && - strcmp(c->name, tbtype[j]) == 0 && - S_ISDIR(c->statbuf.st_mode)) { - if ((ret = xftw_type2(directory, c->name, 1, funcptr))) - goto cleanup; - *(c->name) = '\0'; /* processed */ - } - } - } - /* any other directories left, in alphabetical order */ - for (i = 0 ; i < t->used; ++i) { - c = t->contents+i; - if (*(c->name) && - S_ISDIR(c->statbuf.st_mode)) { - if ((ret = xftw_type2(directory, c->name, 1, funcptr))) - goto cleanup; - *(c->name) = '\0'; /* processed */ - } - } - /* anything else is passed to the user function */ - for (i = 0 ; i < t->used; ++i) { - c = t->contents+i; - if (*(c->name)) { - verbose("%s found in type 1 directory %s\n", c->name, directory); - if ((ret = xftw_do_name(directory, c->name, &(c->statbuf), funcptr))) - goto cleanup; - *(c->name) = '\0'; /* processed */ - } - } - } - else { - /* type 2 */ - xftw_free_tree(0); - if ((ret = xftw_type2(directory, NULL, 0, funcptr))) - goto cleanup; - } - - /* amazing, it all worked */ - ret = 0; -cleanup: - for (i = 0; i < XFTW_MAXDEPTH; ++i) - xftw_free_tree(i); - return(ret); -} |