| /* |
| * Copyright (C) 2009-2012 the libgit2 contributors |
| * |
| * This file is part of libgit2, distributed under the GNU GPL v2 with |
| * a Linking Exception. For full terms see the included COPYING file. |
| */ |
| #include "common.h" |
| #include "fileops.h" |
| #include <ctype.h> |
| |
| int git_futils_mkpath2file(const char *file_path, const mode_t mode) |
| { |
| int result = 0; |
| git_buf target_folder = GIT_BUF_INIT; |
| |
| if (git_path_dirname_r(&target_folder, file_path) < 0) |
| return -1; |
| |
| /* Does the containing folder exist? */ |
| if (git_path_isdir(target_folder.ptr) == false) |
| /* Let's create the tree structure */ |
| result = git_futils_mkdir_r(target_folder.ptr, NULL, mode); |
| |
| git_buf_free(&target_folder); |
| return result; |
| } |
| |
| int git_futils_mktmp(git_buf *path_out, const char *filename) |
| { |
| int fd; |
| |
| git_buf_sets(path_out, filename); |
| git_buf_puts(path_out, "_git2_XXXXXX"); |
| |
| if (git_buf_oom(path_out)) |
| return -1; |
| |
| if ((fd = p_mkstemp(path_out->ptr)) < 0) { |
| giterr_set(GITERR_OS, |
| "Failed to create temporary file '%s'", path_out->ptr); |
| return -1; |
| } |
| |
| return fd; |
| } |
| |
| int git_futils_creat_withpath(const char *path, const mode_t dirmode, const mode_t mode) |
| { |
| int fd; |
| |
| if (git_futils_mkpath2file(path, dirmode) < 0) |
| return -1; |
| |
| fd = p_creat(path, mode); |
| if (fd < 0) { |
| giterr_set(GITERR_OS, "Failed to create file '%s'", path); |
| return -1; |
| } |
| |
| return fd; |
| } |
| |
| int git_futils_creat_locked(const char *path, const mode_t mode) |
| { |
| int fd; |
| |
| #ifdef GIT_WIN32 |
| wchar_t* buf; |
| |
| buf = gitwin_to_utf16(path); |
| fd = _wopen(buf, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_EXCL, mode); |
| git__free(buf); |
| #else |
| fd = open(path, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_EXCL, mode); |
| #endif |
| |
| if (fd < 0) { |
| giterr_set(GITERR_OS, "Failed to create locked file '%s'", path); |
| return -1; |
| } |
| |
| return fd; |
| } |
| |
| int git_futils_creat_locked_withpath(const char *path, const mode_t dirmode, const mode_t mode) |
| { |
| if (git_futils_mkpath2file(path, dirmode) < 0) |
| return -1; |
| |
| return git_futils_creat_locked(path, mode); |
| } |
| |
| int git_futils_open_ro(const char *path) |
| { |
| int fd = p_open(path, O_RDONLY); |
| if (fd < 0) { |
| if (errno == ENOENT) |
| fd = GIT_ENOTFOUND; |
| giterr_set(GITERR_OS, "Failed to open '%s'", path); |
| } |
| return fd; |
| } |
| |
| git_off_t git_futils_filesize(git_file fd) |
| { |
| struct stat sb; |
| |
| if (p_fstat(fd, &sb)) { |
| giterr_set(GITERR_OS, "Failed to stat file descriptor"); |
| return -1; |
| } |
| |
| return sb.st_size; |
| } |
| |
| mode_t git_futils_canonical_mode(mode_t raw_mode) |
| { |
| if (S_ISREG(raw_mode)) |
| return S_IFREG | GIT_CANONICAL_PERMS(raw_mode); |
| else if (S_ISLNK(raw_mode)) |
| return S_IFLNK; |
| else if (S_ISGITLINK(raw_mode)) |
| return S_IFGITLINK; |
| else if (S_ISDIR(raw_mode)) |
| return S_IFDIR; |
| else |
| return 0; |
| } |
| |
| int git_futils_readbuffer_updated(git_buf *buf, const char *path, time_t *mtime, int *updated) |
| { |
| git_file fd; |
| size_t len; |
| struct stat st; |
| |
| assert(buf && path && *path); |
| |
| if (updated != NULL) |
| *updated = 0; |
| |
| if ((fd = git_futils_open_ro(path)) < 0) |
| return fd; |
| |
| if (p_fstat(fd, &st) < 0 || S_ISDIR(st.st_mode) || !git__is_sizet(st.st_size+1)) { |
| p_close(fd); |
| giterr_set(GITERR_OS, "Invalid regular file stat for '%s'", path); |
| return -1; |
| } |
| |
| /* |
| * If we were given a time, we only want to read the file if it |
| * has been modified. |
| */ |
| if (mtime != NULL && *mtime >= st.st_mtime) { |
| p_close(fd); |
| return 0; |
| } |
| |
| if (mtime != NULL) |
| *mtime = st.st_mtime; |
| |
| len = (size_t) st.st_size; |
| |
| git_buf_clear(buf); |
| |
| if (git_buf_grow(buf, len + 1) < 0) { |
| p_close(fd); |
| return -1; |
| } |
| |
| buf->ptr[len] = '\0'; |
| |
| while (len > 0) { |
| ssize_t read_size = p_read(fd, buf->ptr, len); |
| |
| if (read_size < 0) { |
| p_close(fd); |
| giterr_set(GITERR_OS, "Failed to read descriptor for '%s'", path); |
| return -1; |
| } |
| |
| len -= read_size; |
| buf->size += read_size; |
| } |
| |
| p_close(fd); |
| |
| if (updated != NULL) |
| *updated = 1; |
| |
| return 0; |
| } |
| |
| int git_futils_readbuffer(git_buf *buf, const char *path) |
| { |
| return git_futils_readbuffer_updated(buf, path, NULL, NULL); |
| } |
| |
| int git_futils_mv_withpath(const char *from, const char *to, const mode_t dirmode) |
| { |
| if (git_futils_mkpath2file(to, dirmode) < 0) |
| return -1; |
| |
| if (p_rename(from, to) < 0) { |
| giterr_set(GITERR_OS, "Failed to rename '%s' to '%s'", from, to); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int git_futils_mmap_ro(git_map *out, git_file fd, git_off_t begin, size_t len) |
| { |
| return p_mmap(out, len, GIT_PROT_READ, GIT_MAP_SHARED, fd, begin); |
| } |
| |
| int git_futils_mmap_ro_file(git_map *out, const char *path) |
| { |
| git_file fd = git_futils_open_ro(path); |
| git_off_t len; |
| int result; |
| |
| if (fd < 0) |
| return fd; |
| |
| len = git_futils_filesize(fd); |
| if (!git__is_sizet(len)) { |
| giterr_set(GITERR_OS, "File `%s` too large to mmap", path); |
| return -1; |
| } |
| |
| result = git_futils_mmap_ro(out, fd, 0, (size_t)len); |
| p_close(fd); |
| return result; |
| } |
| |
| void git_futils_mmap_free(git_map *out) |
| { |
| p_munmap(out); |
| } |
| |
| int git_futils_mkdir_r(const char *path, const char *base, const mode_t mode) |
| { |
| git_buf make_path = GIT_BUF_INIT; |
| size_t start = 0; |
| char *pp, *sp; |
| bool failed = false; |
| |
| if (base != NULL) { |
| /* |
| * when a base is being provided, it is supposed to already exist. |
| * Therefore, no attempt is being made to recursively create this leading path |
| * segment. It's just skipped. */ |
| start = strlen(base); |
| if (git_buf_joinpath(&make_path, base, path) < 0) |
| return -1; |
| } else { |
| int root_path_offset; |
| |
| if (git_buf_puts(&make_path, path) < 0) |
| return -1; |
| |
| root_path_offset = git_path_root(make_path.ptr); |
| if (root_path_offset > 0) { |
| /* |
| * On Windows, will skip the drive name (eg. C: or D:) |
| * or the leading part of a network path (eg. //computer_name ) */ |
| start = root_path_offset; |
| } |
| } |
| |
| pp = make_path.ptr + start; |
| |
| while (!failed && (sp = strchr(pp, '/')) != NULL) { |
| if (sp != pp && git_path_isdir(make_path.ptr) == false) { |
| *sp = 0; |
| |
| /* Do not choke while trying to recreate an existing directory */ |
| if (p_mkdir(make_path.ptr, mode) < 0 && errno != EEXIST) |
| failed = true; |
| |
| *sp = '/'; |
| } |
| |
| pp = sp + 1; |
| } |
| |
| if (*pp != '\0' && !failed) { |
| if (p_mkdir(make_path.ptr, mode) < 0 && errno != EEXIST) |
| failed = true; |
| } |
| |
| git_buf_free(&make_path); |
| |
| if (failed) { |
| giterr_set(GITERR_OS, |
| "Failed to create directory structure at '%s'", path); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static int _rmdir_recurs_foreach(void *opaque, git_buf *path) |
| { |
| git_directory_removal_type removal_type = *(git_directory_removal_type *)opaque; |
| |
| assert(removal_type == GIT_DIRREMOVAL_EMPTY_HIERARCHY |
| || removal_type == GIT_DIRREMOVAL_FILES_AND_DIRS |
| || removal_type == GIT_DIRREMOVAL_ONLY_EMPTY_DIRS); |
| |
| if (git_path_isdir(path->ptr) == true) { |
| if (git_path_direach(path, _rmdir_recurs_foreach, opaque) < 0) |
| return -1; |
| |
| if (p_rmdir(path->ptr) < 0) { |
| if (removal_type == GIT_DIRREMOVAL_ONLY_EMPTY_DIRS && (errno == ENOTEMPTY || errno == EEXIST)) |
| return 0; |
| |
| giterr_set(GITERR_OS, "Could not remove directory '%s'", path->ptr); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| if (removal_type == GIT_DIRREMOVAL_FILES_AND_DIRS) { |
| if (p_unlink(path->ptr) < 0) { |
| giterr_set(GITERR_OS, "Could not remove directory. File '%s' cannot be removed", path->ptr); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| if (removal_type == GIT_DIRREMOVAL_EMPTY_HIERARCHY) { |
| giterr_set(GITERR_OS, "Could not remove directory. File '%s' still present", path->ptr); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int git_futils_rmdir_r(const char *path, git_directory_removal_type removal_type) |
| { |
| int error; |
| git_buf p = GIT_BUF_INIT; |
| |
| error = git_buf_sets(&p, path); |
| if (!error) |
| error = _rmdir_recurs_foreach(&removal_type, &p); |
| git_buf_free(&p); |
| return error; |
| } |
| |
| #ifdef GIT_WIN32 |
| struct win32_path { |
| wchar_t path[MAX_PATH]; |
| DWORD len; |
| }; |
| |
| static int win32_expand_path(struct win32_path *s_root, const wchar_t *templ) |
| { |
| s_root->len = ExpandEnvironmentStringsW(templ, s_root->path, MAX_PATH); |
| return s_root->len ? 0 : -1; |
| } |
| |
| static int win32_find_file(git_buf *path, const struct win32_path *root, const char *filename) |
| { |
| int error = 0; |
| size_t len; |
| wchar_t *file_utf16 = NULL; |
| char *file_utf8 = NULL; |
| |
| if (!root || !filename || (len = strlen(filename)) == 0) |
| return GIT_ENOTFOUND; |
| |
| /* allocate space for wchar_t path to file */ |
| file_utf16 = git__calloc(root->len + len + 2, sizeof(wchar_t)); |
| GITERR_CHECK_ALLOC(file_utf16); |
| |
| /* append root + '\\' + filename as wchar_t */ |
| memcpy(file_utf16, root->path, root->len * sizeof(wchar_t)); |
| |
| if (*filename == '/' || *filename == '\\') |
| filename++; |
| |
| if (gitwin_append_utf16(file_utf16 + root->len - 1, filename, len + 1) != |
| (int)len + 1) { |
| error = -1; |
| goto cleanup; |
| } |
| |
| /* check access */ |
| if (_waccess(file_utf16, F_OK) < 0) { |
| error = GIT_ENOTFOUND; |
| goto cleanup; |
| } |
| |
| /* convert to utf8 */ |
| if ((file_utf8 = gitwin_from_utf16(file_utf16)) == NULL) |
| error = -1; |
| else { |
| git_path_mkposix(file_utf8); |
| git_buf_attach(path, file_utf8, 0); |
| } |
| |
| cleanup: |
| git__free(file_utf16); |
| return error; |
| } |
| #endif |
| |
| int git_futils_find_system_file(git_buf *path, const char *filename) |
| { |
| #ifdef GIT_WIN32 |
| struct win32_path root; |
| |
| if (win32_expand_path(&root, L"%PROGRAMFILES%\\Git\\etc\\") < 0 || |
| root.path[0] == L'%') /* i.e. no expansion happened */ |
| { |
| giterr_set(GITERR_OS, "Cannot locate the system's Program Files directory"); |
| return -1; |
| } |
| |
| if (win32_find_file(path, &root, filename) < 0) { |
| git_buf_clear(path); |
| return GIT_ENOTFOUND; |
| } |
| |
| return 0; |
| |
| #else |
| if (git_buf_joinpath(path, "/etc", filename) < 0) |
| return -1; |
| |
| if (git_path_exists(path->ptr) == true) |
| return 0; |
| |
| git_buf_clear(path); |
| return GIT_ENOTFOUND; |
| #endif |
| } |
| |
| int git_futils_find_global_file(git_buf *path, const char *filename) |
| { |
| #ifdef GIT_WIN32 |
| struct win32_path root; |
| |
| if (win32_expand_path(&root, L"%USERPROFILE%\\") < 0 || |
| root.path[0] == L'%') /* i.e. no expansion happened */ |
| { |
| giterr_set(GITERR_OS, "Cannot locate the user's profile directory"); |
| return -1; |
| } |
| |
| if (win32_find_file(path, &root, filename) < 0) { |
| git_buf_clear(path); |
| return GIT_ENOTFOUND; |
| } |
| |
| return 0; |
| #else |
| const char *home = getenv("HOME"); |
| |
| if (home == NULL) { |
| giterr_set(GITERR_OS, "Global file lookup failed. " |
| "Cannot locate the user's home directory"); |
| return -1; |
| } |
| |
| if (git_buf_joinpath(path, home, filename) < 0) |
| return -1; |
| |
| if (git_path_exists(path->ptr) == false) { |
| git_buf_clear(path); |
| return GIT_ENOTFOUND; |
| } |
| |
| return 0; |
| #endif |
| } |