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https://github.com/git/git
synced 2024-08-25 02:35:46 +00:00
![René Scharfe](/assets/img/avatar_default.png)
Convert setup_git_directory_gently_1() and its helper functions setup_explicit_git_dir(), setup_discovered_git_dir() and setup_bare_git_dir() to use a struct strbuf to hold the current working directory. Replacing the PATH_MAX-sized buffer used before removes a path length limition on some file systems. The functions are converted all in one go because they all read and write the variable cwd. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
869 lines
23 KiB
C
869 lines
23 KiB
C
#include "cache.h"
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#include "dir.h"
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#include "string-list.h"
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static int inside_git_dir = -1;
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static int inside_work_tree = -1;
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/*
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* The input parameter must contain an absolute path, and it must already be
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* normalized.
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*
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* Find the part of an absolute path that lies inside the work tree by
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* dereferencing symlinks outside the work tree, for example:
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* /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file
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* /dir/file (work tree is /) -> dir/file
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* /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2
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* /dir/repolink/file (repolink points to /dir/repo) -> file
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* /dir/repo (exactly equal to work tree) -> (empty string)
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*/
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static int abspath_part_inside_repo(char *path)
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{
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size_t len;
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size_t wtlen;
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char *path0;
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int off;
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const char *work_tree = get_git_work_tree();
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if (!work_tree)
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return -1;
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wtlen = strlen(work_tree);
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len = strlen(path);
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off = offset_1st_component(path);
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/* check if work tree is already the prefix */
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if (wtlen <= len && !strncmp(path, work_tree, wtlen)) {
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if (path[wtlen] == '/') {
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memmove(path, path + wtlen + 1, len - wtlen);
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return 0;
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} else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') {
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/* work tree is the root, or the whole path */
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memmove(path, path + wtlen, len - wtlen + 1);
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return 0;
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}
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/* work tree might match beginning of a symlink to work tree */
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off = wtlen;
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}
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path0 = path;
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path += off;
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/* check each '/'-terminated level */
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while (*path) {
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path++;
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if (*path == '/') {
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*path = '\0';
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if (strcmp(real_path(path0), work_tree) == 0) {
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memmove(path0, path + 1, len - (path - path0));
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return 0;
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}
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*path = '/';
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}
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}
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/* check whole path */
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if (strcmp(real_path(path0), work_tree) == 0) {
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*path0 = '\0';
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return 0;
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}
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return -1;
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}
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/*
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* Normalize "path", prepending the "prefix" for relative paths. If
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* remaining_prefix is not NULL, return the actual prefix still
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* remains in the path. For example, prefix = sub1/sub2/ and path is
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*
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* foo -> sub1/sub2/foo (full prefix)
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* ../foo -> sub1/foo (remaining prefix is sub1/)
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* ../../bar -> bar (no remaining prefix)
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* ../../sub1/sub2/foo -> sub1/sub2/foo (but no remaining prefix)
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* `pwd`/../bar -> sub1/bar (no remaining prefix)
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*/
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char *prefix_path_gently(const char *prefix, int len,
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int *remaining_prefix, const char *path)
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{
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const char *orig = path;
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char *sanitized;
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if (is_absolute_path(orig)) {
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sanitized = xmalloc(strlen(path) + 1);
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if (remaining_prefix)
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*remaining_prefix = 0;
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if (normalize_path_copy_len(sanitized, path, remaining_prefix)) {
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free(sanitized);
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return NULL;
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}
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if (abspath_part_inside_repo(sanitized)) {
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free(sanitized);
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return NULL;
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}
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} else {
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sanitized = xmalloc(len + strlen(path) + 1);
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if (len)
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memcpy(sanitized, prefix, len);
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strcpy(sanitized + len, path);
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if (remaining_prefix)
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*remaining_prefix = len;
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if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) {
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free(sanitized);
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return NULL;
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}
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}
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return sanitized;
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}
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char *prefix_path(const char *prefix, int len, const char *path)
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{
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char *r = prefix_path_gently(prefix, len, NULL, path);
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if (!r)
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die("'%s' is outside repository", path);
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return r;
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}
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int path_inside_repo(const char *prefix, const char *path)
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{
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int len = prefix ? strlen(prefix) : 0;
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char *r = prefix_path_gently(prefix, len, NULL, path);
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if (r) {
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free(r);
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return 1;
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}
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return 0;
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}
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int check_filename(const char *prefix, const char *arg)
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{
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const char *name;
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struct stat st;
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if (starts_with(arg, ":/")) {
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if (arg[2] == '\0') /* ":/" is root dir, always exists */
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return 1;
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name = arg + 2;
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} else if (prefix)
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name = prefix_filename(prefix, strlen(prefix), arg);
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else
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name = arg;
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if (!lstat(name, &st))
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return 1; /* file exists */
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if (errno == ENOENT || errno == ENOTDIR)
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return 0; /* file does not exist */
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die_errno("failed to stat '%s'", arg);
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}
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static void NORETURN die_verify_filename(const char *prefix,
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const char *arg,
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int diagnose_misspelt_rev)
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{
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if (!diagnose_misspelt_rev)
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die("%s: no such path in the working tree.\n"
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"Use 'git <command> -- <path>...' to specify paths that do not exist locally.",
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arg);
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/*
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* Saying "'(icase)foo' does not exist in the index" when the
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* user gave us ":(icase)foo" is just stupid. A magic pathspec
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* begins with a colon and is followed by a non-alnum; do not
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* let maybe_die_on_misspelt_object_name() even trigger.
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*/
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if (!(arg[0] == ':' && !isalnum(arg[1])))
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maybe_die_on_misspelt_object_name(arg, prefix);
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/* ... or fall back the most general message. */
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die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
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"Use '--' to separate paths from revisions, like this:\n"
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"'git <command> [<revision>...] -- [<file>...]'", arg);
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}
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/*
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* Verify a filename that we got as an argument for a pathspec
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* entry. Note that a filename that begins with "-" never verifies
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* as true, because even if such a filename were to exist, we want
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* it to be preceded by the "--" marker (or we want the user to
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* use a format like "./-filename")
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*
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* The "diagnose_misspelt_rev" is used to provide a user-friendly
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* diagnosis when dying upon finding that "name" is not a pathname.
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* If set to 1, the diagnosis will try to diagnose "name" as an
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* invalid object name (e.g. HEAD:foo). If set to 0, the diagnosis
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* will only complain about an inexisting file.
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*
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* This function is typically called to check that a "file or rev"
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* argument is unambiguous. In this case, the caller will want
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* diagnose_misspelt_rev == 1 when verifying the first non-rev
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* argument (which could have been a revision), and
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* diagnose_misspelt_rev == 0 for the next ones (because we already
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* saw a filename, there's not ambiguity anymore).
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*/
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void verify_filename(const char *prefix,
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const char *arg,
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int diagnose_misspelt_rev)
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{
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if (*arg == '-')
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die("bad flag '%s' used after filename", arg);
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if (check_filename(prefix, arg))
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return;
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die_verify_filename(prefix, arg, diagnose_misspelt_rev);
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}
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/*
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* Opposite of the above: the command line did not have -- marker
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* and we parsed the arg as a refname. It should not be interpretable
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* as a filename.
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*/
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void verify_non_filename(const char *prefix, const char *arg)
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{
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if (!is_inside_work_tree() || is_inside_git_dir())
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return;
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if (*arg == '-')
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return; /* flag */
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if (!check_filename(prefix, arg))
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return;
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die("ambiguous argument '%s': both revision and filename\n"
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"Use '--' to separate paths from revisions, like this:\n"
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"'git <command> [<revision>...] -- [<file>...]'", arg);
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}
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/*
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* Test if it looks like we're at a git directory.
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* We want to see:
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*
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* - either an objects/ directory _or_ the proper
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* GIT_OBJECT_DIRECTORY environment variable
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* - a refs/ directory
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* - either a HEAD symlink or a HEAD file that is formatted as
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* a proper "ref:", or a regular file HEAD that has a properly
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* formatted sha1 object name.
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*/
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int is_git_directory(const char *suspect)
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{
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char path[PATH_MAX];
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size_t len = strlen(suspect);
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if (PATH_MAX <= len + strlen("/objects"))
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die("Too long path: %.*s", 60, suspect);
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strcpy(path, suspect);
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if (getenv(DB_ENVIRONMENT)) {
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if (access(getenv(DB_ENVIRONMENT), X_OK))
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return 0;
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}
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else {
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strcpy(path + len, "/objects");
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if (access(path, X_OK))
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return 0;
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}
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strcpy(path + len, "/refs");
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if (access(path, X_OK))
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return 0;
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strcpy(path + len, "/HEAD");
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if (validate_headref(path))
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return 0;
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return 1;
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}
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int is_inside_git_dir(void)
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{
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if (inside_git_dir < 0)
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inside_git_dir = is_inside_dir(get_git_dir());
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return inside_git_dir;
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}
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int is_inside_work_tree(void)
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{
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if (inside_work_tree < 0)
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inside_work_tree = is_inside_dir(get_git_work_tree());
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return inside_work_tree;
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}
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void setup_work_tree(void)
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{
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const char *work_tree, *git_dir;
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static int initialized = 0;
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if (initialized)
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return;
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work_tree = get_git_work_tree();
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git_dir = get_git_dir();
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if (!is_absolute_path(git_dir))
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git_dir = real_path(get_git_dir());
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if (!work_tree || chdir(work_tree))
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die("This operation must be run in a work tree");
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/*
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* Make sure subsequent git processes find correct worktree
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* if $GIT_WORK_TREE is set relative
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*/
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if (getenv(GIT_WORK_TREE_ENVIRONMENT))
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setenv(GIT_WORK_TREE_ENVIRONMENT, ".", 1);
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set_git_dir(remove_leading_path(git_dir, work_tree));
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initialized = 1;
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}
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static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
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{
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char repo_config[PATH_MAX+1];
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/*
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* git_config() can't be used here because it calls git_pathdup()
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* to get $GIT_CONFIG/config. That call will make setup_git_env()
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* set git_dir to ".git".
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*
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* We are in gitdir setup, no git dir has been found useable yet.
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* Use a gentler version of git_config() to check if this repo
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* is a good one.
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*/
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snprintf(repo_config, PATH_MAX, "%s/config", gitdir);
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git_config_early(check_repository_format_version, NULL, repo_config);
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if (GIT_REPO_VERSION < repository_format_version) {
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if (!nongit_ok)
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die ("Expected git repo version <= %d, found %d",
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GIT_REPO_VERSION, repository_format_version);
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warning("Expected git repo version <= %d, found %d",
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GIT_REPO_VERSION, repository_format_version);
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warning("Please upgrade Git");
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*nongit_ok = -1;
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return -1;
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}
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return 0;
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}
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/*
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* Try to read the location of the git directory from the .git file,
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* return path to git directory if found.
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*/
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const char *read_gitfile(const char *path)
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{
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char *buf;
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char *dir;
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const char *slash;
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struct stat st;
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int fd;
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ssize_t len;
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if (stat(path, &st))
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return NULL;
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if (!S_ISREG(st.st_mode))
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return NULL;
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fd = open(path, O_RDONLY);
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if (fd < 0)
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die_errno("Error opening '%s'", path);
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buf = xmalloc(st.st_size + 1);
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len = read_in_full(fd, buf, st.st_size);
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close(fd);
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if (len != st.st_size)
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die("Error reading %s", path);
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buf[len] = '\0';
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if (!starts_with(buf, "gitdir: "))
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die("Invalid gitfile format: %s", path);
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while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
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len--;
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if (len < 9)
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die("No path in gitfile: %s", path);
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buf[len] = '\0';
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dir = buf + 8;
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if (!is_absolute_path(dir) && (slash = strrchr(path, '/'))) {
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size_t pathlen = slash+1 - path;
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size_t dirlen = pathlen + len - 8;
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dir = xmalloc(dirlen + 1);
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strncpy(dir, path, pathlen);
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strncpy(dir + pathlen, buf + 8, len - 8);
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dir[dirlen] = '\0';
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free(buf);
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buf = dir;
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}
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if (!is_git_directory(dir))
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die("Not a git repository: %s", dir);
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path = real_path(dir);
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free(buf);
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return path;
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}
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static const char *setup_explicit_git_dir(const char *gitdirenv,
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struct strbuf *cwd,
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int *nongit_ok)
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{
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const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
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const char *worktree;
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char *gitfile;
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int offset;
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if (PATH_MAX - 40 < strlen(gitdirenv))
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die("'$%s' too big", GIT_DIR_ENVIRONMENT);
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gitfile = (char*)read_gitfile(gitdirenv);
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if (gitfile) {
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gitfile = xstrdup(gitfile);
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gitdirenv = gitfile;
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}
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if (!is_git_directory(gitdirenv)) {
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if (nongit_ok) {
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*nongit_ok = 1;
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free(gitfile);
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return NULL;
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}
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die("Not a git repository: '%s'", gitdirenv);
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}
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if (check_repository_format_gently(gitdirenv, nongit_ok)) {
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free(gitfile);
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return NULL;
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}
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/* #3, #7, #11, #15, #19, #23, #27, #31 (see t1510) */
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if (work_tree_env)
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set_git_work_tree(work_tree_env);
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else if (is_bare_repository_cfg > 0) {
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if (git_work_tree_cfg) /* #22.2, #30 */
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die("core.bare and core.worktree do not make sense");
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/* #18, #26 */
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set_git_dir(gitdirenv);
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free(gitfile);
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return NULL;
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}
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else if (git_work_tree_cfg) { /* #6, #14 */
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if (is_absolute_path(git_work_tree_cfg))
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set_git_work_tree(git_work_tree_cfg);
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else {
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char core_worktree[PATH_MAX];
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if (chdir(gitdirenv))
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die_errno("Could not chdir to '%s'", gitdirenv);
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if (chdir(git_work_tree_cfg))
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die_errno("Could not chdir to '%s'", git_work_tree_cfg);
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if (!getcwd(core_worktree, PATH_MAX))
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die_errno("Could not get directory '%s'", git_work_tree_cfg);
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if (chdir(cwd->buf))
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die_errno("Could not come back to cwd");
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set_git_work_tree(core_worktree);
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}
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}
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else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) {
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/* #16d */
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set_git_dir(gitdirenv);
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free(gitfile);
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return NULL;
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}
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else /* #2, #10 */
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set_git_work_tree(".");
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/* set_git_work_tree() must have been called by now */
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worktree = get_git_work_tree();
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/* both get_git_work_tree() and cwd are already normalized */
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if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */
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set_git_dir(gitdirenv);
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free(gitfile);
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return NULL;
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}
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offset = dir_inside_of(cwd->buf, worktree);
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if (offset >= 0) { /* cwd inside worktree? */
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set_git_dir(real_path(gitdirenv));
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if (chdir(worktree))
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die_errno("Could not chdir to '%s'", worktree);
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strbuf_addch(cwd, '/');
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free(gitfile);
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return cwd->buf + offset;
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}
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/* cwd outside worktree */
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set_git_dir(gitdirenv);
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free(gitfile);
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return NULL;
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}
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static const char *setup_discovered_git_dir(const char *gitdir,
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struct strbuf *cwd, int offset,
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int *nongit_ok)
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{
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if (check_repository_format_gently(gitdir, nongit_ok))
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return NULL;
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/* --work-tree is set without --git-dir; use discovered one */
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if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
|
|
if (offset != cwd->len && !is_absolute_path(gitdir))
|
|
gitdir = xstrdup(real_path(gitdir));
|
|
if (chdir(cwd->buf))
|
|
die_errno("Could not come back to cwd");
|
|
return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
|
|
}
|
|
|
|
/* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
|
|
if (is_bare_repository_cfg > 0) {
|
|
set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir));
|
|
if (chdir(cwd->buf))
|
|
die_errno("Could not come back to cwd");
|
|
return NULL;
|
|
}
|
|
|
|
/* #0, #1, #5, #8, #9, #12, #13 */
|
|
set_git_work_tree(".");
|
|
if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
|
|
set_git_dir(gitdir);
|
|
inside_git_dir = 0;
|
|
inside_work_tree = 1;
|
|
if (offset == cwd->len)
|
|
return NULL;
|
|
|
|
/* Make "offset" point to past the '/', and add a '/' at the end */
|
|
offset++;
|
|
strbuf_addch(cwd, '/');
|
|
return cwd->buf + offset;
|
|
}
|
|
|
|
/* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
|
|
static const char *setup_bare_git_dir(struct strbuf *cwd, int offset,
|
|
int *nongit_ok)
|
|
{
|
|
int root_len;
|
|
|
|
if (check_repository_format_gently(".", nongit_ok))
|
|
return NULL;
|
|
|
|
setenv(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, "0", 1);
|
|
|
|
/* --work-tree is set without --git-dir; use discovered one */
|
|
if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
|
|
const char *gitdir;
|
|
|
|
gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset);
|
|
if (chdir(cwd->buf))
|
|
die_errno("Could not come back to cwd");
|
|
return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
|
|
}
|
|
|
|
inside_git_dir = 1;
|
|
inside_work_tree = 0;
|
|
if (offset != cwd->len) {
|
|
if (chdir(cwd->buf))
|
|
die_errno("Cannot come back to cwd");
|
|
root_len = offset_1st_component(cwd->buf);
|
|
strbuf_setlen(cwd, offset > root_len ? offset : root_len);
|
|
set_git_dir(cwd->buf);
|
|
}
|
|
else
|
|
set_git_dir(".");
|
|
return NULL;
|
|
}
|
|
|
|
static const char *setup_nongit(const char *cwd, int *nongit_ok)
|
|
{
|
|
if (!nongit_ok)
|
|
die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
|
|
if (chdir(cwd))
|
|
die_errno("Cannot come back to cwd");
|
|
*nongit_ok = 1;
|
|
return NULL;
|
|
}
|
|
|
|
static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_len)
|
|
{
|
|
struct stat buf;
|
|
if (stat(path, &buf)) {
|
|
die_errno("failed to stat '%*s%s%s'",
|
|
prefix_len,
|
|
prefix ? prefix : "",
|
|
prefix ? "/" : "", path);
|
|
}
|
|
return buf.st_dev;
|
|
}
|
|
|
|
/*
|
|
* A "string_list_each_func_t" function that canonicalizes an entry
|
|
* from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or
|
|
* discards it if unusable. The presence of an empty entry in
|
|
* GIT_CEILING_DIRECTORIES turns off canonicalization for all
|
|
* subsequent entries.
|
|
*/
|
|
static int canonicalize_ceiling_entry(struct string_list_item *item,
|
|
void *cb_data)
|
|
{
|
|
int *empty_entry_found = cb_data;
|
|
char *ceil = item->string;
|
|
|
|
if (!*ceil) {
|
|
*empty_entry_found = 1;
|
|
return 0;
|
|
} else if (!is_absolute_path(ceil)) {
|
|
return 0;
|
|
} else if (*empty_entry_found) {
|
|
/* Keep entry but do not canonicalize it */
|
|
return 1;
|
|
} else {
|
|
const char *real_path = real_path_if_valid(ceil);
|
|
if (!real_path)
|
|
return 0;
|
|
free(item->string);
|
|
item->string = xstrdup(real_path);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We cannot decide in this function whether we are in the work tree or
|
|
* not, since the config can only be read _after_ this function was called.
|
|
*/
|
|
static const char *setup_git_directory_gently_1(int *nongit_ok)
|
|
{
|
|
const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
|
|
struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
|
|
static struct strbuf cwd = STRBUF_INIT;
|
|
const char *gitdirenv, *ret;
|
|
char *gitfile;
|
|
int offset, offset_parent, ceil_offset = -1;
|
|
dev_t current_device = 0;
|
|
int one_filesystem = 1;
|
|
|
|
/*
|
|
* Let's assume that we are in a git repository.
|
|
* If it turns out later that we are somewhere else, the value will be
|
|
* updated accordingly.
|
|
*/
|
|
if (nongit_ok)
|
|
*nongit_ok = 0;
|
|
|
|
if (strbuf_getcwd(&cwd))
|
|
die_errno("Unable to read current working directory");
|
|
offset = cwd.len;
|
|
|
|
/*
|
|
* If GIT_DIR is set explicitly, we're not going
|
|
* to do any discovery, but we still do repository
|
|
* validation.
|
|
*/
|
|
gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
|
|
if (gitdirenv)
|
|
return setup_explicit_git_dir(gitdirenv, &cwd, nongit_ok);
|
|
|
|
if (env_ceiling_dirs) {
|
|
int empty_entry_found = 0;
|
|
|
|
string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1);
|
|
filter_string_list(&ceiling_dirs, 0,
|
|
canonicalize_ceiling_entry, &empty_entry_found);
|
|
ceil_offset = longest_ancestor_length(cwd.buf, &ceiling_dirs);
|
|
string_list_clear(&ceiling_dirs, 0);
|
|
}
|
|
|
|
if (ceil_offset < 0 && has_dos_drive_prefix(cwd.buf))
|
|
ceil_offset = 1;
|
|
|
|
/*
|
|
* Test in the following order (relative to the cwd):
|
|
* - .git (file containing "gitdir: <path>")
|
|
* - .git/
|
|
* - ./ (bare)
|
|
* - ../.git
|
|
* - ../.git/
|
|
* - ../ (bare)
|
|
* - ../../.git/
|
|
* etc.
|
|
*/
|
|
one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
|
|
if (one_filesystem)
|
|
current_device = get_device_or_die(".", NULL, 0);
|
|
for (;;) {
|
|
gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
|
|
if (gitfile)
|
|
gitdirenv = gitfile = xstrdup(gitfile);
|
|
else {
|
|
if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
|
|
gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
|
|
}
|
|
|
|
if (gitdirenv) {
|
|
ret = setup_discovered_git_dir(gitdirenv,
|
|
&cwd, offset,
|
|
nongit_ok);
|
|
free(gitfile);
|
|
return ret;
|
|
}
|
|
free(gitfile);
|
|
|
|
if (is_git_directory("."))
|
|
return setup_bare_git_dir(&cwd, offset, nongit_ok);
|
|
|
|
offset_parent = offset;
|
|
while (--offset_parent > ceil_offset && cwd.buf[offset_parent] != '/');
|
|
if (offset_parent <= ceil_offset)
|
|
return setup_nongit(cwd.buf, nongit_ok);
|
|
if (one_filesystem) {
|
|
dev_t parent_device = get_device_or_die("..", cwd.buf,
|
|
offset);
|
|
if (parent_device != current_device) {
|
|
if (nongit_ok) {
|
|
if (chdir(cwd.buf))
|
|
die_errno("Cannot come back to cwd");
|
|
*nongit_ok = 1;
|
|
return NULL;
|
|
}
|
|
strbuf_setlen(&cwd, offset);
|
|
die("Not a git repository (or any parent up to mount point %s)\n"
|
|
"Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).",
|
|
cwd.buf);
|
|
}
|
|
}
|
|
if (chdir("..")) {
|
|
strbuf_setlen(&cwd, offset);
|
|
die_errno("Cannot change to '%s/..'", cwd.buf);
|
|
}
|
|
offset = offset_parent;
|
|
}
|
|
}
|
|
|
|
const char *setup_git_directory_gently(int *nongit_ok)
|
|
{
|
|
const char *prefix;
|
|
|
|
prefix = setup_git_directory_gently_1(nongit_ok);
|
|
if (prefix)
|
|
setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1);
|
|
else
|
|
setenv(GIT_PREFIX_ENVIRONMENT, "", 1);
|
|
|
|
if (startup_info) {
|
|
startup_info->have_repository = !nongit_ok || !*nongit_ok;
|
|
startup_info->prefix = prefix;
|
|
}
|
|
return prefix;
|
|
}
|
|
|
|
int git_config_perm(const char *var, const char *value)
|
|
{
|
|
int i;
|
|
char *endptr;
|
|
|
|
if (value == NULL)
|
|
return PERM_GROUP;
|
|
|
|
if (!strcmp(value, "umask"))
|
|
return PERM_UMASK;
|
|
if (!strcmp(value, "group"))
|
|
return PERM_GROUP;
|
|
if (!strcmp(value, "all") ||
|
|
!strcmp(value, "world") ||
|
|
!strcmp(value, "everybody"))
|
|
return PERM_EVERYBODY;
|
|
|
|
/* Parse octal numbers */
|
|
i = strtol(value, &endptr, 8);
|
|
|
|
/* If not an octal number, maybe true/false? */
|
|
if (*endptr != 0)
|
|
return git_config_bool(var, value) ? PERM_GROUP : PERM_UMASK;
|
|
|
|
/*
|
|
* Treat values 0, 1 and 2 as compatibility cases, otherwise it is
|
|
* a chmod value to restrict to.
|
|
*/
|
|
switch (i) {
|
|
case PERM_UMASK: /* 0 */
|
|
return PERM_UMASK;
|
|
case OLD_PERM_GROUP: /* 1 */
|
|
return PERM_GROUP;
|
|
case OLD_PERM_EVERYBODY: /* 2 */
|
|
return PERM_EVERYBODY;
|
|
}
|
|
|
|
/* A filemode value was given: 0xxx */
|
|
|
|
if ((i & 0600) != 0600)
|
|
die("Problem with core.sharedRepository filemode value "
|
|
"(0%.3o).\nThe owner of files must always have "
|
|
"read and write permissions.", i);
|
|
|
|
/*
|
|
* Mask filemode value. Others can not get write permission.
|
|
* x flags for directories are handled separately.
|
|
*/
|
|
return -(i & 0666);
|
|
}
|
|
|
|
int check_repository_format_version(const char *var, const char *value, void *cb)
|
|
{
|
|
if (strcmp(var, "core.repositoryformatversion") == 0)
|
|
repository_format_version = git_config_int(var, value);
|
|
else if (strcmp(var, "core.sharedrepository") == 0)
|
|
shared_repository = git_config_perm(var, value);
|
|
else if (strcmp(var, "core.bare") == 0) {
|
|
is_bare_repository_cfg = git_config_bool(var, value);
|
|
if (is_bare_repository_cfg == 1)
|
|
inside_work_tree = -1;
|
|
} else if (strcmp(var, "core.worktree") == 0) {
|
|
if (!value)
|
|
return config_error_nonbool(var);
|
|
free(git_work_tree_cfg);
|
|
git_work_tree_cfg = xstrdup(value);
|
|
inside_work_tree = -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int check_repository_format(void)
|
|
{
|
|
return check_repository_format_gently(get_git_dir(), NULL);
|
|
}
|
|
|
|
/*
|
|
* Returns the "prefix", a path to the current working directory
|
|
* relative to the work tree root, or NULL, if the current working
|
|
* directory is not a strict subdirectory of the work tree root. The
|
|
* prefix always ends with a '/' character.
|
|
*/
|
|
const char *setup_git_directory(void)
|
|
{
|
|
return setup_git_directory_gently(NULL);
|
|
}
|
|
|
|
const char *resolve_gitdir(const char *suspect)
|
|
{
|
|
if (is_git_directory(suspect))
|
|
return suspect;
|
|
return read_gitfile(suspect);
|
|
}
|
|
|
|
/* if any standard file descriptor is missing open it to /dev/null */
|
|
void sanitize_stdfds(void)
|
|
{
|
|
int fd = open("/dev/null", O_RDWR, 0);
|
|
while (fd != -1 && fd < 2)
|
|
fd = dup(fd);
|
|
if (fd == -1)
|
|
die_errno("open /dev/null or dup failed");
|
|
if (fd > 2)
|
|
close(fd);
|
|
}
|
|
|
|
int daemonize(void)
|
|
{
|
|
#ifdef NO_POSIX_GOODIES
|
|
errno = ENOSYS;
|
|
return -1;
|
|
#else
|
|
switch (fork()) {
|
|
case 0:
|
|
break;
|
|
case -1:
|
|
die_errno("fork failed");
|
|
default:
|
|
exit(0);
|
|
}
|
|
if (setsid() == -1)
|
|
die_errno("setsid failed");
|
|
close(0);
|
|
close(1);
|
|
close(2);
|
|
sanitize_stdfds();
|
|
return 0;
|
|
#endif
|
|
}
|