| index : pacman | |
| Archlinux32 fork of pacman | gitolite user |
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| -rw-r--r-- | lib/libalpm/filelist.c | 225 |
diff --git a/lib/libalpm/filelist.c b/lib/libalpm/filelist.c index 697dd23b..f8db9a33 100644 --- a/lib/libalpm/filelist.c +++ b/lib/libalpm/filelist.c @@ -25,199 +25,6 @@ #include "filelist.h" #include "util.h" -/** Helper function for comparing strings when sorting */ -static int _alpm_filelist_strcmp(const void *s1, const void *s2) -{ - return strcmp(*(char **)s1, *(char **)s2); -} - -/* TODO make sure callers check the return value so we can bail on errors. - * For now we soldier on as best we can, skipping paths that are too long to - * resolve and using the original filenames on memory errors. */ -/** - * @brief Resolves a symlink and its children. - * - * @attention Pre-condition: files must be sorted! - * - * @param files filelist to resolve - * @param i pointer to the index in files to start processing, will point to - * the last file processed on return - * @param path absolute path for the symlink being resolved - * @param root_len length of the root portion of path - * @param resolving is file \i in \files a symlink that needs to be resolved - * - * @return 0 on success, -1 on error - */ -int _alpm_filelist_resolve_link(alpm_filelist_t *files, size_t *i, - char *path, size_t root_len, int resolving) -{ - char *causal_dir = NULL; /* symlink being resolved */ - char *filename_r = NULL; /* resolved filename */ - size_t causal_dir_len = 0, causal_dir_r_len = 0; - - if(resolving) { - /* deal with the symlink being resolved */ - MALLOC(filename_r, PATH_MAX, goto error); - causal_dir = files->files[*i].name; - causal_dir_len = strlen(causal_dir); - if(realpath(path, filename_r) == NULL) { - files->resolved_path[*i] = causal_dir; - FREE(filename_r); - return -1; - } - causal_dir_r_len = strlen(filename_r + root_len) + 1; - if(causal_dir_r_len >= PATH_MAX) { - files->resolved_path[*i] = causal_dir; - FREE(filename_r); - return -1; - } - /* remove root_r from filename_r */ - memmove(filename_r, filename_r + root_len, causal_dir_r_len); - filename_r[causal_dir_r_len - 1] = '/'; - filename_r[causal_dir_r_len] = '\0'; - STRDUP(files->resolved_path[*i], filename_r, goto error); - (*i)++; - } - - for(; *i < files->count; (*i)++) { - char *filename = files->files[*i].name; - size_t filename_len = strlen(filename); - size_t filename_r_len = filename_len; - struct stat sbuf; - int exists; - - if(resolving) { - if(filename_len < causal_dir_len || strncmp(filename, causal_dir, causal_dir_len) != 0) { - /* not inside causal_dir anymore */ - break; - } - - filename_r_len = filename_len + causal_dir_r_len - causal_dir_len; - if(filename_r_len >= PATH_MAX) { - /* resolved path is too long */ - files->resolved_path[*i] = filename; - continue; - } - - strcpy(filename_r + causal_dir_r_len, filename + causal_dir_len); - } - - /* deal with files and paths too long to resolve*/ - if(filename[filename_len - 1] != '/' || root_len + filename_r_len >= PATH_MAX) { - if(resolving) { - STRDUP(files->resolved_path[*i], filename_r, goto error); - } else { - files->resolved_path[*i] = filename; - } - continue; - } - - /* construct absolute path and stat() */ - strcpy(path + root_len, resolving ? filename_r : filename); - exists = !_alpm_lstat(path, &sbuf); - - /* deal with symlinks */ - if(exists && S_ISLNK(sbuf.st_mode)) { - _alpm_filelist_resolve_link(files, i, path, root_len, 1); - continue; - } - - /* deal with normal directories */ - if(resolving) { - STRDUP(files->resolved_path[*i], filename_r, goto error); - } else { - files->resolved_path[*i] = filename; - } - - /* deal with children of non-existent directories to reduce lstat() calls */ - if(!exists) { - for((*i)++; *i < files->count; (*i)++) { - char *f = files->files[*i].name; - size_t f_len = strlen(f); - size_t f_r_len; - - if(f_len < filename_len || strncmp(f, filename, filename_len) != 0) { - /* not inside the non-existent dir anymore */ - break; - } - - f_r_len = f_len + causal_dir_r_len - causal_dir_len; - if(resolving && f_r_len <= PATH_MAX) { - strcpy(filename_r + causal_dir_r_len, f + causal_dir_len); - STRDUP(files->resolved_path[*i], filename_r, goto error); - } else { - files->resolved_path[*i] = f; - } - } - (*i)--; - } - } - (*i)--; - - FREE(filename_r); - - return 0; - -error: - FREE(filename_r); - /* out of memory, set remaining files to their original names */ - for(; *i < files->count; (*i)++) { - files->resolved_path[*i] = files->files[*i].name; - } - (*i)--; - return -1; -} - -/** - * @brief Takes a file list and resolves all directory paths according to the - * filesystem - * - * @attention Pre-condition: files must be sorted! - * - * @note A symlink and directory at the same path in two difference packages - * causes a conflict so the filepath can not change as packages get installed - * - * @param handle the context handle - * @param files list of files to resolve - * - * @return 0 on success, -1 on error - */ -int _alpm_filelist_resolve(alpm_handle_t *handle, alpm_filelist_t *files) -{ - char path[PATH_MAX]; - size_t root_len, i = 0; - int ret = 0; - - if(!files || files->resolved_path) { - return 0; - } - - CALLOC(files->resolved_path, files->count, sizeof(char *), return -1); - - /* not much point in going on if we can't even resolve root */ - if(realpath(handle->root, path) == NULL){ - return -1; - } - root_len = strlen(path); - if(root_len + 1 >= PATH_MAX) { - return -1; - } - /* append '/' if root is not "/" */ - if(path[root_len - 1] != '/') { - path[root_len] = '/'; - root_len++; - path[root_len] = '\0'; - } - - ret = _alpm_filelist_resolve_link(files, &i, path, root_len, 0); - - qsort(files->resolved_path, files->count, sizeof(char *), - _alpm_filelist_strcmp); - - return ret; -} - - /* Returns the difference of the provided two lists of files. * Pre-condition: both lists are sorted! * When done, free the list but NOT the contained data. @@ -229,8 +36,8 @@ alpm_list_t *_alpm_filelist_difference(alpm_filelist_t *filesA, size_t ctrA = 0, ctrB = 0; while(ctrA < filesA->count && ctrB < filesB->count) { - char *strA = filesA->resolved_path[ctrA]; - char *strB = filesB->resolved_path[ctrB]; + char *strA = filesA->files[ctrA].name; + char *strB = filesB->files[ctrB].name; int cmp = strcmp(strA, strB); if(cmp < 0) { @@ -247,7 +54,7 @@ alpm_list_t *_alpm_filelist_difference(alpm_filelist_t *filesA, /* ensure we have completely emptied pA */ while(ctrA < filesA->count) { - ret = alpm_list_add(ret, filesA->resolved_path[ctrA]); + ret = alpm_list_add(ret, filesA->files[ctrA].name); ctrA++; } @@ -269,17 +76,17 @@ alpm_list_t *_alpm_filelist_intersection(alpm_filelist_t *filesA, char *strA, *strB; isdirA = 0; - strA = filesA->resolved_path[ctrA]; + strA = filesA->files[ctrA].name; if(strA[strlen(strA)-1] == '/') { isdirA = 1; - strA = strndup(filesA->resolved_path[ctrA], strlen(strA)-1); + strA = strndup(strA, strlen(strA)-1); } isdirB = 0; - strB = filesB->resolved_path[ctrB]; + strB = filesB->files[ctrB].name; if(strB[strlen(strB)-1] == '/') { isdirB = 1; - strB = strndup(filesB->resolved_path[ctrB], strlen(strB)-1); + strB = strndup(strB, strlen(strB)-1); } cmp = strcmp(strA, strB); @@ -297,7 +104,7 @@ alpm_list_t *_alpm_filelist_intersection(alpm_filelist_t *filesA, /* when not directories, item in both qualifies as an intersect */ if(! (isdirA && isdirB)) { - ret = alpm_list_add(ret, filesA->resolved_path[ctrA]); + ret = alpm_list_add(ret, filesA->files[ctrA].name); } ctrA++; ctrB++; @@ -323,11 +130,10 @@ int _alpm_files_cmp(const void *f1, const void *f2) return strcmp(file1->name, file2->name); } - -char SYMEXPORT *alpm_filelist_contains(alpm_filelist_t *filelist, +alpm_file_t SYMEXPORT *alpm_filelist_contains(alpm_filelist_t *filelist, const char *path) { - alpm_file_t key, *match; + alpm_file_t key; if(!filelist) { return NULL; @@ -335,17 +141,8 @@ char SYMEXPORT *alpm_filelist_contains(alpm_filelist_t *filelist, key.name = (char *)path; - match = bsearch(&key, filelist->files, filelist->count, + return bsearch(&key, filelist->files, filelist->count, sizeof(alpm_file_t), _alpm_files_cmp); - - if(match) { - return match->name; - } else if(filelist->resolved_path) { - return bsearch(&path, filelist->resolved_path, filelist->count, - sizeof(char *), _alpm_filelist_strcmp); - } else { - return NULL; - } } /* vim: set ts=2 sw=2 noet: */ |