/*
* 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 || errno == ENOTDIR)
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
}
int git_futils_fake_symlink(const char *old, const char *new)
{
int retcode = GIT_ERROR;
int fd = git_futils_creat_withpath(new, 0755, 0644);
if (fd >= 0) {
retcode = p_write(fd, old, strlen(old));
p_close(fd);
}
return retcode;
}
