/*

* Copyright (C) the libgit2 contributors. All rights reserved.

*

* 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 "global.h"

#include <ctype.h>

#if GIT_WIN32

#include "win32/findfile.h"

#endif

int git_futils_mkpath2file(const char *file_path, const mode_t mode)

{

return git_futils_mkdir(

file_path, NULL, mode,

GIT_MKDIR_PATH | GIT_MKDIR_SKIP_LAST | GIT_MKDIR_VERIFY_DIR);

}

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 = p_open(path, O_WRONLY | O_CREAT | O_TRUNC |

O_EXCL | O_BINARY | O_CLOEXEC, mode);

if (fd < 0) {

giterr_set(GITERR_OS, "Failed to create locked file '%s'", path);

return errno == EEXIST ? GIT_ELOCKED : -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)

return git_path_set_error(errno, path, "open");

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_PERMS_CANONICAL(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_fd(git_buf *buf, git_file fd, size_t len)

{

ssize_t read_size = 0;

git_buf_clear(buf);

if (git_buf_grow(buf, len + 1) < 0)

return -1;

/* p_read loops internally to read len bytes */

read_size = p_read(fd, buf->ptr, len);

if (read_size != (ssize_t)len) {

giterr_set(GITERR_OS, "Failed to read descriptor");

return -1;

}

buf->ptr[read_size] = '\0';

buf->size = read_size;

return 0;

}

int git_futils_readbuffer_updated(

git_buf *buf, const char *path, time_t *mtime, size_t *size, int *updated)

{

git_file fd;

struct stat st;

bool changed = false;

assert(buf && path && *path);

if (updated != NULL)

*updated = 0;

if (p_stat(path, &st) < 0)

return git_path_set_error(errno, path, "stat");

if (S_ISDIR(st.st_mode) || !git__is_sizet(st.st_size+1)) {

giterr_set(GITERR_OS, "Invalid regular file stat for '%s'", path);

return -1;

}

/*

* If we were given a time and/or a size, we only want to read the file

* if it has been modified.

*/

if (size && *size != (size_t)st.st_size)

changed = true;

if (mtime && *mtime != st.st_mtime)

changed = true;

if (!size && !mtime)

changed = true;

if (!changed) {

return 0;

}

if (mtime != NULL)

*mtime = st.st_mtime;

if (size != NULL)

*size = (size_t)st.st_size;

if ((fd = git_futils_open_ro(path)) < 0)

return fd;

if (git_futils_readbuffer_fd(buf, fd, (size_t)st.st_size) < 0) {

p_close(fd);

return -1;

}

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, NULL);

}

int git_futils_writebuffer(

const git_buf *buf, const char *path, int flags, mode_t mode)

{

int fd, error = 0;

if (flags <= 0)

flags = O_CREAT | O_TRUNC | O_WRONLY;

if (!mode)

mode = GIT_FILEMODE_BLOB;

if ((fd = p_open(path, flags, mode)) < 0) {

giterr_set(GITERR_OS, "Could not open '%s' for writing", path);

return fd;

}

if ((error = p_write(fd, git_buf_cstr(buf), git_buf_len(buf))) < 0) {

giterr_set(GITERR_OS, "Could not write to '%s'", path);

(void)p_close(fd);

return error;

}

if ((error = p_close(fd)) < 0)

giterr_set(GITERR_OS, "Error while closing '%s'", path);

return error;

}

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(

const char *path,

const char *base,

mode_t mode,

uint32_t flags)

{

int error = -1;

git_buf make_path = GIT_BUF_INIT;

ssize_t root = 0, min_root_len;

char lastch = '/', *tail;

struct stat st;

/* build path and find "root" where we should start calling mkdir */

if (git_path_join_unrooted(&make_path, path, base, &root) < 0)

return -1;

if (make_path.size == 0) {

giterr_set(GITERR_OS, "Attempt to create empty path");

goto done;

}

/* remove trailing slashes on path */

while (make_path.ptr[make_path.size - 1] == '/') {

make_path.size--;

make_path.ptr[make_path.size] = '\0';

}

/* if we are not supposed to made the last element, truncate it */

if ((flags & GIT_MKDIR_SKIP_LAST2) != 0) {

git_buf_rtruncate_at_char(&make_path, '/');

flags |= GIT_MKDIR_SKIP_LAST;

}

if ((flags & GIT_MKDIR_SKIP_LAST) != 0)

git_buf_rtruncate_at_char(&make_path, '/');

/* if nothing left after truncation, then we're done! */

if (!make_path.size) {

error = 0;

goto done;

}

/* if we are not supposed to make the whole path, reset root */

if ((flags & GIT_MKDIR_PATH) == 0)

root = git_buf_rfind(&make_path, '/');

/* advance root past drive name or network mount prefix */

min_root_len = git_path_root(make_path.ptr);

if (root < min_root_len)

root = min_root_len;

while (root >= 0 && make_path.ptr[root] == '/')

++root;

/* clip root to make_path length */

if (root > (ssize_t)make_path.size)

root = (ssize_t)make_path.size; /* i.e. NUL byte of string */

if (root < 0)

root = 0;

/* walk down tail of path making each directory */

for (tail = &make_path.ptr[root]; *tail; *tail = lastch) {

/* advance tail to include next path component */

while (*tail == '/')

tail++;

while (*tail && *tail != '/')

tail++;

/* truncate path at next component */

lastch = *tail;

*tail = '\0';

st.st_mode = 0;

/* make directory */

if (p_mkdir(make_path.ptr, mode) < 0) {

int tmp_errno = errno;

/* ignore error if directory already exists */

if (p_stat(make_path.ptr, &st) < 0 || !S_ISDIR(st.st_mode)) {

errno = tmp_errno;

giterr_set(GITERR_OS, "Failed to make directory '%s'", make_path.ptr);

goto done;

}

/* with exclusive create, existing dir is an error */

if ((flags & GIT_MKDIR_EXCL) != 0) {

giterr_set(GITERR_OS, "Directory already exists '%s'", make_path.ptr);

error = GIT_EEXISTS;

goto done;

}

}

/* chmod if requested and necessary */

if (((flags & GIT_MKDIR_CHMOD_PATH) != 0 ||

(lastch == '\0' && (flags & GIT_MKDIR_CHMOD) != 0)) &&

st.st_mode != mode &&

(error = p_chmod(make_path.ptr, mode)) < 0) {

giterr_set(GITERR_OS, "Failed to set permissions on '%s'", make_path.ptr);

goto done;

}

}

error = 0;

/* check that full path really is a directory if requested & needed */

if ((flags & GIT_MKDIR_VERIFY_DIR) != 0 &&

lastch != '\0' &&

(p_stat(make_path.ptr, &st) < 0 || !S_ISDIR(st.st_mode))) {

giterr_set(GITERR_OS, "Path is not a directory '%s'", make_path.ptr);

error = GIT_ENOTFOUND;

}

done:

git_buf_free(&make_path);

return error;

}

int git_futils_mkdir_r(const char *path, const char *base, const mode_t mode)

{

return git_futils_mkdir(path, base, mode, GIT_MKDIR_PATH);

}

typedef struct {

const char *base;

size_t baselen;

uint32_t flags;

int error;

int depth;

} futils__rmdir_data;

#define FUTILS_MAX_DEPTH 100

static int futils__error_cannot_rmdir(const char *path, const char *filemsg)

{

if (filemsg)

giterr_set(GITERR_OS, "Could not remove directory. File '%s' %s",

path, filemsg);

else

giterr_set(GITERR_OS, "Could not remove directory '%s'", path);

return -1;

}

static int futils__rm_first_parent(git_buf *path, const char *ceiling)

{

int error = GIT_ENOTFOUND;

struct stat st;

while (error == GIT_ENOTFOUND) {

git_buf_rtruncate_at_char(path, '/');

if (!path->size || git__prefixcmp(path->ptr, ceiling) != 0)

error = 0;

else if (p_lstat_posixly(path->ptr, &st) == 0) {

if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))

error = p_unlink(path->ptr);

else if (!S_ISDIR(st.st_mode))

error = -1; /* fail to remove non-regular file */

} else if (errno != ENOTDIR)

error = -1;

}

if (error)

futils__error_cannot_rmdir(path->ptr, "cannot remove parent");

return error;

}

static int futils__rmdir_recurs_foreach(void *opaque, git_buf *path)

{

futils__rmdir_data *data = opaque;

int error = data->error;

struct stat st;

if (data->depth > FUTILS_MAX_DEPTH)

error = futils__error_cannot_rmdir(

path->ptr, "directory nesting too deep");

else if ((error = p_lstat_posixly(path->ptr, &st)) < 0) {

if (errno == ENOENT)

error = 0;

else if (errno == ENOTDIR) {

/* asked to remove a/b/c/d/e and a/b is a normal file */

if ((data->flags & GIT_RMDIR_REMOVE_BLOCKERS) != 0)

error = futils__rm_first_parent(path, data->base);

else

futils__error_cannot_rmdir(

path->ptr, "parent is not directory");

}

else

error = git_path_set_error(errno, path->ptr, "rmdir");

}

else if (S_ISDIR(st.st_mode)) {

data->depth++;

error = git_path_direach(path, 0, futils__rmdir_recurs_foreach, data);

if (error < 0)

return (error == GIT_EUSER) ? data->error : error;

data->depth--;

if (data->depth == 0 && (data->flags & GIT_RMDIR_SKIP_ROOT) != 0)

return data->error;

if ((error = p_rmdir(path->ptr)) < 0) {

if ((data->flags & GIT_RMDIR_SKIP_NONEMPTY) != 0 &&

(errno == ENOTEMPTY || errno == EEXIST || errno == EBUSY))

error = 0;

else

error = git_path_set_error(errno, path->ptr, "rmdir");

}

}

else if ((data->flags & GIT_RMDIR_REMOVE_FILES) != 0) {

if (p_unlink(path->ptr) < 0)

error = git_path_set_error(errno, path->ptr, "remove");

}

else if ((data->flags & GIT_RMDIR_SKIP_NONEMPTY) == 0)

error = futils__error_cannot_rmdir(path->ptr, "still present");

data->error = error;

return error;

}

static int futils__rmdir_empty_parent(void *opaque, git_buf *path)

{

futils__rmdir_data *data = opaque;

int error;

if (git_buf_len(path) <= data->baselen)

return GIT_ITEROVER;

error = p_rmdir(git_buf_cstr(path));

if (error) {

int en = errno;

if (en == ENOENT || en == ENOTDIR) {

giterr_clear();

error = 0;

} else if (en == ENOTEMPTY || en == EEXIST || en == EBUSY) {

giterr_clear();

error = GIT_ITEROVER;

} else {

error = git_path_set_error(errno, git_buf_cstr(path), "rmdir");

}

}

return error;

}

int git_futils_rmdir_r(

const char *path, const char *base, uint32_t flags)

{

int error;

git_buf fullpath = GIT_BUF_INIT;

futils__rmdir_data data = { 0 };

/* build path and find "root" where we should start calling mkdir */

if (git_path_join_unrooted(&fullpath, path, base, NULL) < 0)

return -1;

data.base = base ? base : "";

data.baselen = base ? strlen(base) : 0;

data.flags = flags;

error = futils__rmdir_recurs_foreach(&data, &fullpath);

/* remove now-empty parents if requested */

if (!error && (flags & GIT_RMDIR_EMPTY_PARENTS) != 0) {

error = git_path_walk_up(

&fullpath, base, futils__rmdir_empty_parent, &data);

if (error == GIT_ITEROVER)

error = 0;

}

git_buf_free(&fullpath);

return error;

}

static int git_futils_guess_system_dirs(git_buf *out)

{

#ifdef GIT_WIN32

return git_win32__find_system_dirs(out, L"etc\\");

#else

return git_buf_sets(out, "/etc");

#endif

}

static int git_futils_guess_global_dirs(git_buf *out)

{

#ifdef GIT_WIN32

return git_win32__find_global_dirs(out);

#else

return git_buf_sets(out, getenv("HOME"));

#endif

}

static int git_futils_guess_xdg_dirs(git_buf *out)

{

#ifdef GIT_WIN32

return git_win32__find_xdg_dirs(out);

#else

const char *env = NULL;

if ((env = getenv("XDG_CONFIG_HOME")) != NULL)

return git_buf_joinpath(out, env, "git");

else if ((env = getenv("HOME")) != NULL)

return git_buf_joinpath(out, env, ".config/git");

git_buf_clear(out);

return 0;

#endif

}

static int git_futils_guess_template_dirs(git_buf *out)

{

#ifdef GIT_WIN32

return git_win32__find_system_dirs(out, L"share\\git-core\\templates");

#else

return git_buf_sets(out, "/usr/share/git-core/templates");

#endif

}

typedef int (*git_futils_dirs_guess_cb)(git_buf *out);

static git_buf git_futils__dirs[GIT_FUTILS_DIR__MAX] =

{ GIT_BUF_INIT, GIT_BUF_INIT, GIT_BUF_INIT, GIT_BUF_INIT };

static git_futils_dirs_guess_cb git_futils__dir_guess[GIT_FUTILS_DIR__MAX] = {

git_futils_guess_system_dirs,

git_futils_guess_global_dirs,

git_futils_guess_xdg_dirs,

git_futils_guess_template_dirs,

};

static void git_futils_dirs_global_shutdown(void)

{

int i;

for (i = 0; i < GIT_FUTILS_DIR__MAX; ++i)

git_buf_free(&git_futils__dirs[i]);

}

int git_futils_dirs_global_init(void)

{

git_futils_dir_t i;

const git_buf *path;

int error = 0;

for (i = 0; !error && i < GIT_FUTILS_DIR__MAX; i++)

error = git_futils_dirs_get(&path, i);

git__on_shutdown(git_futils_dirs_global_shutdown);

return error;

}

static int git_futils_check_selector(git_futils_dir_t which)

{

if (which < GIT_FUTILS_DIR__MAX)

return 0;

giterr_set(GITERR_INVALID, "config directory selector out of range");

return -1;

}

int git_futils_dirs_get(const git_buf **out, git_futils_dir_t which)

{

assert(out);

*out = NULL;

GITERR_CHECK_ERROR(git_futils_check_selector(which));

if (!git_buf_len(&git_futils__dirs[which]))

GITERR_CHECK_ERROR(

git_futils__dir_guess[which](&git_futils__dirs[which]));

*out = &git_futils__dirs[which];

return 0;

}

int git_futils_dirs_get_str(char *out, size_t outlen, git_futils_dir_t which)

{

const git_buf *path = NULL;

GITERR_CHECK_ERROR(git_futils_check_selector(which));

GITERR_CHECK_ERROR(git_futils_dirs_get(&path, which));

if (!out || path->size >= outlen) {

giterr_set(GITERR_NOMEMORY, "Buffer is too short for the path");

return GIT_EBUFS;

}

git_buf_copy_cstr(out, outlen, path);

return 0;

}

#define PATH_MAGIC "$PATH"

int git_futils_dirs_set(git_futils_dir_t which, const char *search_path)

{

const char *expand_path = NULL;

git_buf merge = GIT_BUF_INIT;

GITERR_CHECK_ERROR(git_futils_check_selector(which));

if (search_path != NULL)

expand_path = strstr(search_path, PATH_MAGIC);

/* init with default if not yet done and needed (ignoring error) */

if ((!search_path || expand_path) &&

!git_buf_len(&git_futils__dirs[which]))

git_futils__dir_guess[which](&git_futils__dirs[which]);

/* if $PATH is not referenced, then just set the path */

if (!expand_path)

return git_buf_sets(&git_futils__dirs[which], search_path);

/* otherwise set to join(before $PATH, old value, after $PATH) */

if (expand_path > search_path)

git_buf_set(&merge, search_path, expand_path - search_path);

if (git_buf_len(&git_futils__dirs[which]))

git_buf_join(&merge, GIT_PATH_LIST_SEPARATOR,

merge.ptr, git_futils__dirs[which].ptr);

expand_path += strlen(PATH_MAGIC);

if (*expand_path)

git_buf_join(&merge, GIT_PATH_LIST_SEPARATOR, merge.ptr, expand_path);

git_buf_swap(&git_futils__dirs[which], &merge);

git_buf_free(&merge);

return git_buf_oom(&git_futils__dirs[which]) ? -1 : 0;

}

static int git_futils_find_in_dirlist(

git_buf *path, const char *name, git_futils_dir_t which, const char *label)

{

size_t len;

const char *scan, *next = NULL;

const git_buf *syspath;

GITERR_CHECK_ERROR(git_futils_dirs_get(&syspath, which));

for (scan = git_buf_cstr(syspath); scan; scan = next) {

for (next = strchr(scan, GIT_PATH_LIST_SEPARATOR);

next && next > scan && next[-1] == '\\';

next = strchr(next + 1, GIT_PATH_LIST_SEPARATOR))

/* find unescaped separator or end of string */;

len = next ? (size_t)(next++ - scan) : strlen(scan);

if (!len)

continue;

GITERR_CHECK_ERROR(git_buf_set(path, scan, len));

if (name)

GITERR_CHECK_ERROR(git_buf_joinpath(path, path->ptr, name));

if (git_path_exists(path->ptr))

return 0;

}

git_buf_clear(path);

giterr_set(GITERR_OS, "The %s file '%s' doesn't exist", label, name);

return GIT_ENOTFOUND;

}

int git_futils_find_system_file(git_buf *path, const char *filename)

{

return git_futils_find_in_dirlist(

path, filename, GIT_FUTILS_DIR_SYSTEM, "system");

}

int git_futils_find_global_file(git_buf *path, const char *filename)

{

return git_futils_find_in_dirlist(

path, filename, GIT_FUTILS_DIR_GLOBAL, "global");

}

int git_futils_find_xdg_file(git_buf *path, const char *filename)

{

return git_futils_find_in_dirlist(

path, filename, GIT_FUTILS_DIR_XDG, "global/xdg");

}

int git_futils_find_template_dir(git_buf *path)

{

return git_futils_find_in_dirlist(

path, NULL, GIT_FUTILS_DIR_TEMPLATE, "template");

}

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;

}

static int cp_by_fd(int ifd, int ofd, bool close_fd_when_done)

{

int error = 0;

char buffer[4096];

ssize_t len = 0;

while (!error && (len = p_read(ifd, buffer, sizeof(buffer))) > 0)

/* p_write() does not have the same semantics as write(). It loops

* internally and will return 0 when it has completed writing.

*/

error = p_write(ofd, buffer, len);

if (len < 0) {

giterr_set(GITERR_OS, "Read error while copying file");

error = (int)len;

}

if (close_fd_when_done) {

p_close(ifd);

p_close(ofd);

}

return error;

}

int git_futils_cp(const char *from, const char *to, mode_t filemode)

{

int ifd, ofd;

if ((ifd = git_futils_open_ro(from)) < 0)

return ifd;

if ((ofd = p_open(to, O_WRONLY | O_CREAT | O_EXCL, filemode)) < 0) {

p_close(ifd);

return git_path_set_error(errno, to, "open for writing");

}

return cp_by_fd(ifd, ofd, true);

}

static int cp_link(const char *from, const char *to, size_t link_size)

{

int error = 0;

ssize_t read_len;

char *link_data = git__malloc(link_size + 1);

GITERR_CHECK_ALLOC(link_data);

read_len = p_readlink(from, link_data, link_size);

if (read_len != (ssize_t)link_size) {

giterr_set(GITERR_OS, "Failed to read symlink data for '%s'", from);

error = -1;

}

else {

link_data[read_len] = '\0';

if (p_symlink(link_data, to) < 0) {

giterr_set(GITERR_OS, "Could not symlink '%s' as '%s'",

link_data, to);

error = -1;

}

}

git__free(link_data);

return error;

}

typedef struct {

const char *to_root;

git_buf to;

ssize_t from_prefix;

uint32_t flags;

uint32_t mkdir_flags;

mode_t dirmode;

int error;

} cp_r_info;

#define GIT_CPDIR__MKDIR_DONE_FOR_TO_ROOT (1u << 10)

static int _cp_r_mkdir(cp_r_info *info, git_buf *from)

{

int error = 0;

/* create root directory the first time we need to create a directory */

if ((info->flags & GIT_CPDIR__MKDIR_DONE_FOR_TO_ROOT) == 0) {

error = git_futils_mkdir(

info->to_root, NULL, info->dirmode,

(info->flags & GIT_CPDIR_CHMOD_DIRS) ? GIT_MKDIR_CHMOD : 0);

info->flags |= GIT_CPDIR__MKDIR_DONE_FOR_TO_ROOT;

}

/* create directory with root as base to prevent excess chmods */

if (!error)

error = git_futils_mkdir(

from->ptr + info->from_prefix, info->to_root,

info->dirmode, info->mkdir_flags);

return error;

}

static int _cp_r_callback(void *ref, git_buf *from)

{

int error = 0;

cp_r_info *info = ref;

struct stat from_st, to_st;

bool exists = false;

if ((info->flags & GIT_CPDIR_COPY_DOTFILES) == 0 &&

from->ptr[git_path_basename_offset(from)] == '.')

return 0;

if (git_buf_joinpath(

&info->to, info->to_root, from->ptr + info->from_prefix) < 0) {

error = -1;

goto exit;

}

if (!(error = git_path_lstat(info->to.ptr, &to_st)))

exists = true;

else if (error != GIT_ENOTFOUND)

goto exit;

else {

giterr_clear();

error = 0;

}

if ((error = git_path_lstat(from->ptr, &from_st)) < 0)

goto exit;

if (S_ISDIR(from_st.st_mode)) {

mode_t oldmode = info->dirmode;

/* if we are not chmod'ing, then overwrite dirmode */

if ((info->flags & GIT_CPDIR_CHMOD_DIRS) == 0)

info->dirmode = from_st.st_mode;

/* make directory now if CREATE_EMPTY_DIRS is requested and needed */

if (!exists && (info->flags & GIT_CPDIR_CREATE_EMPTY_DIRS) != 0)

error = _cp_r_mkdir(info, from);

/* recurse onto target directory */

if (!error && (!exists || S_ISDIR(to_st.st_mode))) {

error = git_path_direach(from, 0, _cp_r_callback, info);

if (error == GIT_EUSER)

error = info->error;

}

if (oldmode != 0)

info->dirmode = oldmode;

goto exit;

}

if (exists) {

if ((info->flags & GIT_CPDIR_OVERWRITE) == 0)

return 0;

if (p_unlink(info->to.ptr) < 0) {

giterr_set(GITERR_OS, "Cannot overwrite existing file '%s'",

info->to.ptr);

error = -1;

goto exit;

}

}

/* Done if this isn't a regular file or a symlink */

if (!S_ISREG(from_st.st_mode) &&

(!S_ISLNK(from_st.st_mode) ||

(info->flags & GIT_CPDIR_COPY_SYMLINKS) == 0))

return 0;

/* Make container directory on demand if needed */

if ((info->flags & GIT_CPDIR_CREATE_EMPTY_DIRS) == 0 &&

(error = _cp_r_mkdir(info, from)) < 0)

goto exit;

/* make symlink or regular file */

if (S_ISLNK(from_st.st_mode))

error = cp_link(from->ptr, info->to.ptr, (size_t)from_st.st_size);

else {

mode_t usemode = from_st.st_mode;

if ((info->flags & GIT_CPDIR_SIMPLE_TO_MODE) != 0)

usemode = GIT_PERMS_FOR_WRITE(usemode);

error = git_futils_cp(from->ptr, info->to.ptr, usemode);

}

exit:

info->error = error;

return error;

}

int git_futils_cp_r(

const char *from,

const char *to,

uint32_t flags,

mode_t dirmode)

{

int error;

git_buf path = GIT_BUF_INIT;

cp_r_info info;

if (git_buf_joinpath(&path, from, "") < 0) /* ensure trailing slash */

return -1;

info.to_root = to;

info.flags = flags;

info.dirmode = dirmode;

info.from_prefix = path.size;

info.error = 0;

git_buf_init(&info.to, 0);

/* precalculate mkdir flags */

if ((flags & GIT_CPDIR_CREATE_EMPTY_DIRS) == 0) {

/* if not creating empty dirs, then use mkdir to create the path on

* demand right before files are copied.

*/

info.mkdir_flags = GIT_MKDIR_PATH | GIT_MKDIR_SKIP_LAST;

if ((flags & GIT_CPDIR_CHMOD_DIRS) != 0)

info.mkdir_flags |= GIT_MKDIR_CHMOD_PATH;

} else {

/* otherwise, we will do simple mkdir as directories are encountered */

info.mkdir_flags =

((flags & GIT_CPDIR_CHMOD_DIRS) != 0) ? GIT_MKDIR_CHMOD : 0;

}