/*
* 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 error;
git_buf target_folder = GIT_BUF_INIT;
error = git_path_dirname_r(&target_folder, file_path);
if (error < GIT_SUCCESS) {
git_buf_free(&target_folder);
return git__throw(GIT_EINVALIDPATH, "Failed to recursively build `%s` tree structure. Unable to parse parent folder name", file_path);
} else {
/* reset error */
error = GIT_SUCCESS;
}
/* Does the containing folder exist? */
if (git_path_isdir(target_folder.ptr) != GIT_SUCCESS)
/* Let's create the tree structure */
error = git_futils_mkdir_r(target_folder.ptr, NULL, mode);
git_buf_free(&target_folder);
return error;
}
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 git__rethrow(git_buf_lasterror(path_out),
"Failed to create temporary file for %s", filename);
if ((fd = p_mkstemp(path_out->ptr)) < 0)
return git__throw(GIT_EOSERR, "Failed to create temporary file %s", path_out->ptr);
return fd;
}
int git_futils_creat_withpath(const char *path, const mode_t dirmode, const mode_t mode)
{
if (git_futils_mkpath2file(path, dirmode) < GIT_SUCCESS)
return git__throw(GIT_EOSERR, "Failed to create file %s", path);
return p_creat(path, mode);
}
int git_futils_creat_locked(const char *path, const mode_t mode)
{
int fd = open(path, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_EXCL, mode);
return fd >= 0 ? fd : git__throw(GIT_EOSERR, "Failed to create locked file. Could not open %s", path);
}
int git_futils_creat_locked_withpath(const char *path, const mode_t dirmode, const mode_t mode)
{
if (git_futils_mkpath2file(path, dirmode) < GIT_SUCCESS)
return git__throw(GIT_EOSERR, "Failed to create locked file %s", path);
return git_futils_creat_locked(path, mode);
}
git_off_t git_futils_filesize(git_file fd)
{
struct stat sb;
if (p_fstat(fd, &sb))
return GIT_ERROR;
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_ISDIR(raw_mode))
return S_IFDIR;
else if (S_ISGITLINK(raw_mode))
return S_IFGITLINK;
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 = p_open(path, O_RDONLY)) < 0) {
return git__throw(GIT_ENOTFOUND, "Failed to read file '%s': %s", path, strerror(errno));
}
if (p_fstat(fd, &st) < 0 || S_ISDIR(st.st_mode) || !git__is_sizet(st.st_size+1)) {
close(fd);
return git__throw(GIT_EOSERR, "Failed to stat file '%s'", path);
}
/*
* 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) {
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) {
close(fd);
return GIT_ENOMEM;
}
buf->ptr[len] = '\0';
while (len > 0) {
ssize_t read_size = p_read(fd, buf->ptr, len);
if (read_size < 0) {
close(fd);
return git__throw(GIT_EOSERR, "Failed to read from FD");
}
len -= read_size;
buf->size += read_size;
}
p_close(fd);
if (mtime != NULL)
*mtime = st.st_mtime;
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) < GIT_SUCCESS)
return GIT_EOSERR; /* The callee already takes care of setting the correct error message. */
return p_rename(from, to); /* The callee already takes care of setting the correct error message. */
}
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 = p_open(path, O_RDONLY /* | O_NOATIME */);
git_off_t len = git_futils_filesize(fd);
int result;
if (!git__is_sizet(len))
return git__throw(GIT_ERROR, "File `%s` too large to mmap", path);
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)
{
int error, root_path_offset;
git_buf make_path = GIT_BUF_INIT;
size_t start;
char *pp, *sp;
if (base != NULL) {
start = strlen(base);
error = git_buf_joinpath(&make_path, base, path);
} else {
start = 0;
error = git_buf_puts(&make_path, path);
}
if (error < GIT_SUCCESS)
return git__rethrow(error, "Failed to create `%s` tree structure", path);
pp = make_path.ptr + start;
root_path_offset = git_path_root(make_path.ptr);
if (root_path_offset > 0)
pp += root_path_offset; /* On Windows, will skip the drive name (eg. C: or D:) */
while (error == GIT_SUCCESS && (sp = strchr(pp, '/')) != NULL) {
if (sp != pp && git_path_isdir(make_path.ptr) < GIT_SUCCESS) {
*sp = 0;
error = p_mkdir(make_path.ptr, mode);
/* Do not choke while trying to recreate an existing directory */
if (errno == EEXIST)
error = GIT_SUCCESS;
*sp = '/';
}
pp = sp + 1;
}
if (*pp != '\0' && error == GIT_SUCCESS) {
error = p_mkdir(make_path.ptr, mode);
if (errno == EEXIST)
error = GIT_SUCCESS;
}
git_buf_free(&make_path);
if (error < GIT_SUCCESS)
return git__throw(error, "Failed to recursively create `%s` tree structure", path);
return GIT_SUCCESS;
}
static int _rmdir_recurs_foreach(void *opaque, git_buf *path)
{
int error = GIT_SUCCESS;
int force = *(int *)opaque;
if (git_path_isdir(path->ptr) == GIT_SUCCESS) {
error = git_path_direach(path, _rmdir_recurs_foreach, opaque);
if (error < GIT_SUCCESS)
return git__rethrow(error, "Failed to remove directory `%s`", path->ptr);
return p_rmdir(path->ptr);
} else if (force) {
return p_unlink(path->ptr);
}
return git__rethrow(error, "Failed to remove directory. `%s` is not empty", path->ptr);
}
int git_futils_rmdir_r(const char *path, int force)
{
int error;
git_buf p = GIT_BUF_INIT;
error = git_buf_sets(&p, path);
if (error == GIT_SUCCESS)
error = _rmdir_recurs_foreach(&force, &p);
git_buf_free(&p);
return error;
}
int git_futils_find_global_file(git_buf *path, const char *filename)
{
int error;
const char *home = getenv("HOME");
#ifdef GIT_WIN32
if (home == NULL)
home = getenv("USERPROFILE");
#endif
if (home == NULL)
return git__throw(GIT_EOSERR, "Failed to open global %s file. "
"Cannot locate the user's home directory.", filename);
if ((error = git_buf_joinpath(path, home, filename)) < GIT_SUCCESS)
return error;
if (git_path_exists(path->ptr) < GIT_SUCCESS) {
git_buf_clear(path);
return GIT_ENOTFOUND;
}
return GIT_SUCCESS;
}
#ifdef GIT_WIN32
typedef struct {
wchar_t *path;
DWORD len;
} win32_path;
static const win32_path *win32_system_root(void)
{
static win32_path s_root = { 0, 0 };
if (s_root.path == NULL) {
const wchar_t *root_tmpl = L"%PROGRAMFILES%\\Git\\etc\\";
s_root.len = ExpandEnvironmentStringsW(root_tmpl, NULL, 0);
if (s_root.len <= 0) {
git__throw(GIT_EOSERR, "Failed to expand environment strings");
return NULL;
}
s_root.path = git__calloc(s_root.len, sizeof(wchar_t));
if (s_root.path == NULL)
return NULL;
if (ExpandEnvironmentStringsW(root_tmpl, s_root.path, s_root.len) != s_root.len) {
git__throw(GIT_EOSERR, "Failed to expand environment strings");
git__free(s_root.path);
s_root.path = NULL;
return NULL;
}
}
return &s_root;
}
static int win32_find_system_file(git_buf *path, const char *filename)
{
int error = GIT_SUCCESS;
const win32_path *root = win32_system_root();
size_t len;
wchar_t *file_utf16 = NULL, *scan;
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));
if (!file_utf16)
return GIT_ENOMEM;
/* 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 = git__throw(GIT_EOSERR, "Failed to build file path");
goto cleanup;
}
for (scan = file_utf16; *scan; scan++)
if (*scan == L'/')
*scan = L'\\';
/* 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 = GIT_ENOMEM;
if (file_utf8) {
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)
{
if (git_buf_joinpath(path, "/etc", filename) < GIT_SUCCESS)
return git_buf_lasterror(path);
if (git_path_exists(path->ptr) == GIT_SUCCESS)
return GIT_SUCCESS;
git_buf_clear(path);
#ifdef GIT_WIN32
return win32_find_system_file(path, filename);
#else
return GIT_ENOTFOUND;
#endif
}
