summaryrefslogtreecommitdiff
path: root/setup.c
diff options
context:
space:
mode:
Diffstat (limited to 'setup.c')
-rw-r--r--setup.c224
1 files changed, 156 insertions, 68 deletions
diff --git a/setup.c b/setup.c
index 5432a31b62..979b13f0c6 100644
--- a/setup.c
+++ b/setup.c
@@ -6,6 +6,70 @@ static int inside_git_dir = -1;
static int inside_work_tree = -1;
/*
+ * The input parameter must contain an absolute path, and it must already be
+ * normalized.
+ *
+ * Find the part of an absolute path that lies inside the work tree by
+ * dereferencing symlinks outside the work tree, for example:
+ * /dir1/repo/dir2/file (work tree is /dir1/repo) -> dir2/file
+ * /dir/file (work tree is /) -> dir/file
+ * /dir/symlink1/symlink2 (symlink1 points to work tree) -> symlink2
+ * /dir/repolink/file (repolink points to /dir/repo) -> file
+ * /dir/repo (exactly equal to work tree) -> (empty string)
+ */
+static int abspath_part_inside_repo(char *path)
+{
+ size_t len;
+ size_t wtlen;
+ char *path0;
+ int off;
+ const char *work_tree = get_git_work_tree();
+
+ if (!work_tree)
+ return -1;
+ wtlen = strlen(work_tree);
+ len = strlen(path);
+ off = offset_1st_component(path);
+
+ /* check if work tree is already the prefix */
+ if (wtlen <= len && !strncmp(path, work_tree, wtlen)) {
+ if (path[wtlen] == '/') {
+ memmove(path, path + wtlen + 1, len - wtlen);
+ return 0;
+ } else if (path[wtlen - 1] == '/' || path[wtlen] == '\0') {
+ /* work tree is the root, or the whole path */
+ memmove(path, path + wtlen, len - wtlen + 1);
+ return 0;
+ }
+ /* work tree might match beginning of a symlink to work tree */
+ off = wtlen;
+ }
+ path0 = path;
+ path += off;
+
+ /* check each '/'-terminated level */
+ while (*path) {
+ path++;
+ if (*path == '/') {
+ *path = '\0';
+ if (strcmp(real_path(path0), work_tree) == 0) {
+ memmove(path0, path + 1, len - (path - path0));
+ return 0;
+ }
+ *path = '/';
+ }
+ }
+
+ /* check whole path */
+ if (strcmp(real_path(path0), work_tree) == 0) {
+ *path0 = '\0';
+ return 0;
+ }
+
+ return -1;
+}
+
+/*
* Normalize "path", prepending the "prefix" for relative paths. If
* remaining_prefix is not NULL, return the actual prefix still
* remains in the path. For example, prefix = sub1/sub2/ and path is
@@ -22,11 +86,17 @@ char *prefix_path_gently(const char *prefix, int len,
const char *orig = path;
char *sanitized;
if (is_absolute_path(orig)) {
- const char *temp = real_path(path);
- sanitized = xmalloc(len + strlen(temp) + 1);
- strcpy(sanitized, temp);
+ sanitized = xmalloc(strlen(path) + 1);
if (remaining_prefix)
*remaining_prefix = 0;
+ if (normalize_path_copy_len(sanitized, path, remaining_prefix)) {
+ free(sanitized);
+ return NULL;
+ }
+ if (abspath_part_inside_repo(sanitized)) {
+ free(sanitized);
+ return NULL;
+ }
} else {
sanitized = xmalloc(len + strlen(path) + 1);
if (len)
@@ -34,26 +104,10 @@ char *prefix_path_gently(const char *prefix, int len,
strcpy(sanitized + len, path);
if (remaining_prefix)
*remaining_prefix = len;
- }
- if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix))
- goto error_out;
- if (is_absolute_path(orig)) {
- size_t root_len, len, total;
- const char *work_tree = get_git_work_tree();
- if (!work_tree)
- goto error_out;
- len = strlen(work_tree);
- root_len = offset_1st_component(work_tree);
- total = strlen(sanitized) + 1;
- if (strncmp(sanitized, work_tree, len) ||
- (len > root_len && sanitized[len] != '\0' && sanitized[len] != '/')) {
- error_out:
+ if (normalize_path_copy_len(sanitized, sanitized, remaining_prefix)) {
free(sanitized);
return NULL;
}
- if (sanitized[len] == '/')
- len++;
- memmove(sanitized, sanitized + len, total - len);
}
return sanitized;
}
@@ -82,7 +136,7 @@ int check_filename(const char *prefix, const char *arg)
const char *name;
struct stat st;
- if (!prefixcmp(arg, ":/")) {
+ if (starts_with(arg, ":/")) {
if (arg[2] == '\0') /* ":/" is root dir, always exists */
return 1;
name = arg + 2;
@@ -304,7 +358,7 @@ const char *read_gitfile(const char *path)
if (len != st.st_size)
die("Error reading %s", path);
buf[len] = '\0';
- if (prefixcmp(buf, "gitdir: "))
+ if (!starts_with(buf, "gitdir: "))
die("Invalid gitfile format: %s", path);
while (buf[len - 1] == '\n' || buf[len - 1] == '\r')
len--;
@@ -333,7 +387,7 @@ const char *read_gitfile(const char *path)
}
static const char *setup_explicit_git_dir(const char *gitdirenv,
- char *cwd, int len,
+ struct strbuf *cwd,
int *nongit_ok)
{
const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
@@ -380,16 +434,16 @@ static const char *setup_explicit_git_dir(const char *gitdirenv,
if (is_absolute_path(git_work_tree_cfg))
set_git_work_tree(git_work_tree_cfg);
else {
- char core_worktree[PATH_MAX];
+ char *core_worktree;
if (chdir(gitdirenv))
die_errno("Could not chdir to '%s'", gitdirenv);
if (chdir(git_work_tree_cfg))
die_errno("Could not chdir to '%s'", git_work_tree_cfg);
- if (!getcwd(core_worktree, PATH_MAX))
- die_errno("Could not get directory '%s'", git_work_tree_cfg);
- if (chdir(cwd))
+ core_worktree = xgetcwd();
+ if (chdir(cwd->buf))
die_errno("Could not come back to cwd");
set_git_work_tree(core_worktree);
+ free(core_worktree);
}
}
else if (!git_env_bool(GIT_IMPLICIT_WORK_TREE_ENVIRONMENT, 1)) {
@@ -405,21 +459,20 @@ static const char *setup_explicit_git_dir(const char *gitdirenv,
worktree = get_git_work_tree();
/* both get_git_work_tree() and cwd are already normalized */
- if (!strcmp(cwd, worktree)) { /* cwd == worktree */
+ if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */
set_git_dir(gitdirenv);
free(gitfile);
return NULL;
}
- offset = dir_inside_of(cwd, worktree);
+ offset = dir_inside_of(cwd->buf, worktree);
if (offset >= 0) { /* cwd inside worktree? */
set_git_dir(real_path(gitdirenv));
if (chdir(worktree))
die_errno("Could not chdir to '%s'", worktree);
- cwd[len++] = '/';
- cwd[len] = '\0';
+ strbuf_addch(cwd, '/');
free(gitfile);
- return cwd + offset;
+ return cwd->buf + offset;
}
/* cwd outside worktree */
@@ -429,7 +482,7 @@ static const char *setup_explicit_git_dir(const char *gitdirenv,
}
static const char *setup_discovered_git_dir(const char *gitdir,
- char *cwd, int offset, int len,
+ struct strbuf *cwd, int offset,
int *nongit_ok)
{
if (check_repository_format_gently(gitdir, nongit_ok))
@@ -437,17 +490,17 @@ static const char *setup_discovered_git_dir(const char *gitdir,
/* --work-tree is set without --git-dir; use discovered one */
if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
- if (offset != len && !is_absolute_path(gitdir))
+ if (offset != cwd->len && !is_absolute_path(gitdir))
gitdir = xstrdup(real_path(gitdir));
- if (chdir(cwd))
+ if (chdir(cwd->buf))
die_errno("Could not come back to cwd");
- return setup_explicit_git_dir(gitdir, cwd, len, nongit_ok);
+ 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 == len ? gitdir : real_path(gitdir));
- if (chdir(cwd))
+ set_git_dir(offset == cwd->len ? gitdir : real_path(gitdir));
+ if (chdir(cwd->buf))
die_errno("Could not come back to cwd");
return NULL;
}
@@ -458,18 +511,18 @@ static const char *setup_discovered_git_dir(const char *gitdir,
set_git_dir(gitdir);
inside_git_dir = 0;
inside_work_tree = 1;
- if (offset == len)
+ if (offset == cwd->len)
return NULL;
/* Make "offset" point to past the '/', and add a '/' at the end */
offset++;
- cwd[len++] = '/';
- cwd[len] = 0;
- return cwd + 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(char *cwd, int offset, int len, int *nongit_ok)
+static const char *setup_bare_git_dir(struct strbuf *cwd, int offset,
+ int *nongit_ok)
{
int root_len;
@@ -482,20 +535,20 @@ static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongi
if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
const char *gitdir;
- gitdir = offset == len ? "." : xmemdupz(cwd, offset);
- if (chdir(cwd))
+ 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, len, nongit_ok);
+ return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
}
inside_git_dir = 1;
inside_work_tree = 0;
- if (offset != len) {
- if (chdir(cwd))
+ if (offset != cwd->len) {
+ if (chdir(cwd->buf))
die_errno("Cannot come back to cwd");
- root_len = offset_1st_component(cwd);
- cwd[offset > root_len ? offset : root_len] = '\0';
- set_git_dir(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(".");
@@ -563,14 +616,23 @@ 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 char cwd[PATH_MAX + 1];
+ static struct strbuf cwd = STRBUF_INIT;
const char *gitdirenv, *ret;
char *gitfile;
- int len, offset, offset_parent, ceil_offset = -1;
+ int offset, offset_parent, ceil_offset = -1;
dev_t current_device = 0;
int one_filesystem = 1;
/*
+ * We may have read an incomplete configuration before
+ * setting-up the git directory. If so, clear the cache so
+ * that the next queries to the configuration reload complete
+ * configuration (including the per-repo config file that we
+ * ignored previously).
+ */
+ git_config_clear();
+
+ /*
* 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.
@@ -578,9 +640,9 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
if (nongit_ok)
*nongit_ok = 0;
- if (!getcwd(cwd, sizeof(cwd) - 1))
+ if (strbuf_getcwd(&cwd))
die_errno("Unable to read current working directory");
- offset = len = strlen(cwd);
+ offset = cwd.len;
/*
* If GIT_DIR is set explicitly, we're not going
@@ -589,7 +651,7 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
*/
gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
if (gitdirenv)
- return setup_explicit_git_dir(gitdirenv, cwd, len, nongit_ok);
+ return setup_explicit_git_dir(gitdirenv, &cwd, nongit_ok);
if (env_ceiling_dirs) {
int empty_entry_found = 0;
@@ -597,11 +659,11 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
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, &ceiling_dirs);
+ ceil_offset = longest_ancestor_length(cwd.buf, &ceiling_dirs);
string_list_clear(&ceiling_dirs, 0);
}
- if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
+ if (ceil_offset < 0 && has_dos_drive_prefix(cwd.buf))
ceil_offset = 1;
/*
@@ -629,7 +691,7 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
if (gitdirenv) {
ret = setup_discovered_git_dir(gitdirenv,
- cwd, offset, len,
+ &cwd, offset,
nongit_ok);
free(gitfile);
return ret;
@@ -637,29 +699,31 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
free(gitfile);
if (is_git_directory("."))
- return setup_bare_git_dir(cwd, offset, len, nongit_ok);
+ return setup_bare_git_dir(&cwd, offset, nongit_ok);
offset_parent = offset;
- while (--offset_parent > ceil_offset && cwd[offset_parent] != '/');
+ while (--offset_parent > ceil_offset && cwd.buf[offset_parent] != '/');
if (offset_parent <= ceil_offset)
- return setup_nongit(cwd, nongit_ok);
+ return setup_nongit(cwd.buf, nongit_ok);
if (one_filesystem) {
- dev_t parent_device = get_device_or_die("..", cwd, offset);
+ dev_t parent_device = get_device_or_die("..", cwd.buf,
+ offset);
if (parent_device != current_device) {
if (nongit_ok) {
- if (chdir(cwd))
+ if (chdir(cwd.buf))
die_errno("Cannot come back to cwd");
*nongit_ok = 1;
return NULL;
}
- cwd[offset] = '\0';
+ 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);
+ "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).",
+ cwd.buf);
}
}
if (chdir("..")) {
- cwd[offset] = '\0';
- die_errno("Cannot change to '%s/..'", cwd);
+ strbuf_setlen(&cwd, offset);
+ die_errno("Cannot change to '%s/..'", cwd.buf);
}
offset = offset_parent;
}
@@ -787,3 +851,27 @@ void sanitize_stdfds(void)
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
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-19 00:31:25 +0000