#include "trace.h"
#include "string-list.h"
#include "pack-revindex.h"
+#include "hash.h"
-#include SHA1_HEADER
#ifndef platform_SHA_CTX
/*
* platform's underlying implementation of SHA-1; could be OpenSSL,
#define GIT_SHA1_RAWSZ 20
#define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ)
+/* The length in byte and in hex digits of the largest possible hash value. */
+#define GIT_MAX_RAWSZ GIT_SHA1_RAWSZ
+#define GIT_MAX_HEXSZ GIT_SHA1_HEXSZ
+
struct object_id {
- unsigned char hash[GIT_SHA1_RAWSZ];
+ unsigned char hash[GIT_MAX_RAWSZ];
};
#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
extern struct index_state the_index;
/* Name hashing */
+extern int test_lazy_init_name_hash(struct index_state *istate, int try_threaded);
extern void add_name_hash(struct index_state *istate, struct cache_entry *ce);
extern void remove_name_hash(struct index_state *istate, struct cache_entry *ce);
extern void free_name_hash(struct index_state *istate);
#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
#define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX"
#define GIT_SUPER_PREFIX_ENVIRONMENT "GIT_INTERNAL_SUPER_PREFIX"
+#define GIT_TOPLEVEL_PREFIX_ENVIRONMENT "GIT_INTERNAL_TOPLEVEL_PREFIX"
#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
extern void setup_work_tree(void);
+/*
+ * Find GIT_DIR of the repository that contains the current working directory,
+ * without changing the working directory or other global state. The result is
+ * appended to gitdir. The return value is either NULL if no repository was
+ * found, or pointing to the path inside gitdir's buffer.
+ */
+extern const char *discover_git_directory(struct strbuf *gitdir);
extern const char *setup_git_directory_gently(int *);
extern const char *setup_git_directory(void);
extern char *prefix_path(const char *prefix, int len, const char *path);
extern char *prefix_path_gently(const char *prefix, int len, int *remaining, const char *path);
-extern const char *prefix_filename(const char *prefix, int len, const char *path);
+
+/*
+ * Concatenate "prefix" (if len is non-zero) and "path", with no
+ * connecting characters (so "prefix" should end with a "/").
+ * Unlike prefix_path, this should be used if the named file does
+ * not have to interact with index entry; i.e. name of a random file
+ * on the filesystem.
+ *
+ * The return value is always a newly allocated string (even if the
+ * prefix was empty).
+ */
+extern char *prefix_filename(const char *prefix, const char *path);
+
extern int check_filename(const char *prefix, const char *name);
extern void verify_filename(const char *prefix,
const char *name,
extern int discard_index(struct index_state *);
extern int unmerged_index(const struct index_state *);
extern int verify_path(const char *path);
+extern int strcmp_offset(const char *s1, const char *s2, size_t *first_change);
extern int index_dir_exists(struct index_state *istate, const char *name, int namelen);
extern void adjust_dirname_case(struct index_state *istate, char *name);
extern struct cache_entry *index_file_exists(struct index_state *istate, const char *name, int namelen, int igncase);
extern int hold_locked_index(struct lock_file *, int);
extern void set_alternate_index_output(const char *);
+extern int verify_index_checksum;
+
/* Environment bits from configuration mechanism */
extern int trust_executable_bit;
extern int trust_ctime;
extern const char *find_unique_abbrev(const unsigned char *sha1, int len);
extern int find_unique_abbrev_r(char *hex, const unsigned char *sha1, int len);
-extern const unsigned char null_sha1[GIT_SHA1_RAWSZ];
+extern const unsigned char null_sha1[GIT_MAX_RAWSZ];
extern const struct object_id null_oid;
static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
/*
* Create the directory containing the named path, using care to be
- * somewhat safe against races. Return one of the scld_error values
- * to indicate success/failure.
+ * somewhat safe against races. Return one of the scld_error values to
+ * indicate success/failure. On error, set errno to describe the
+ * problem.
*
* SCLD_VANISHED indicates that one of the ancestor directories of the
* path existed at one point during the function call and then
enum scld_error safe_create_leading_directories(char *path);
enum scld_error safe_create_leading_directories_const(const char *path);
+/*
+ * Callback function for raceproof_create_file(). This function is
+ * expected to do something that makes dirname(path) permanent despite
+ * the fact that other processes might be cleaning up empty
+ * directories at the same time. Usually it will create a file named
+ * path, but alternatively it could create another file in that
+ * directory, or even chdir() into that directory. The function should
+ * return 0 if the action was completed successfully. On error, it
+ * should return a nonzero result and set errno.
+ * raceproof_create_file() treats two errno values specially:
+ *
+ * - ENOENT -- dirname(path) does not exist. In this case,
+ * raceproof_create_file() tries creating dirname(path)
+ * (and any parent directories, if necessary) and calls
+ * the function again.
+ *
+ * - EISDIR -- the file already exists and is a directory. In this
+ * case, raceproof_create_file() removes the directory if
+ * it is empty (and recursively any empty directories that
+ * it contains) and calls the function again.
+ *
+ * Any other errno causes raceproof_create_file() to fail with the
+ * callback's return value and errno.
+ *
+ * Obviously, this function should be OK with being called again if it
+ * fails with ENOENT or EISDIR. In other scenarios it will not be
+ * called again.
+ */
+typedef int create_file_fn(const char *path, void *cb);
+
+/*
+ * Create a file in dirname(path) by calling fn, creating leading
+ * directories if necessary. Retry a few times in case we are racing
+ * with another process that is trying to clean up the directory that
+ * contains path. See the documentation for create_file_fn for more
+ * details.
+ *
+ * Return the value and set the errno that resulted from the most
+ * recent call of fn. fn is always called at least once, and will be
+ * called more than once if it returns ENOENT or EISDIR.
+ */
+int raceproof_create_file(const char *path, create_file_fn fn, void *cb);
+
int mkdir_in_gitdir(const char *path);
-extern char *expand_user_path(const char *path);
+extern char *expand_user_path(const char *path, int real_home);
const char *enter_repo(const char *path, int strict);
static inline int is_absolute_path(const char *path)
{
int daemon_avoid_alias(const char *path);
extern int is_ntfs_dotgit(const char *name);
+ /*
+ * Returns true iff "str" could be confused as a command-line option when
+ * passed to a sub-program like "ssh". Note that this has nothing to do with
+ * shell-quoting, which should be handled separately; we're assuming here that
+ * the string makes it verbatim to the sub-program.
+ */
+ int looks_like_command_line_option(const char *str);
+
/**
* Return a newly allocated string with the evaluation of
* "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise
*/
extern char *xdg_config_home(const char *filename);
+/**
+ * Return a newly allocated string with the evaluation of
+ * "$XDG_CACHE_HOME/git/$filename" if $XDG_CACHE_HOME is non-empty, otherwise
+ * "$HOME/.cache/git/$filename". Return NULL upon error.
+ */
+extern char *xdg_cache_home(const char *filename);
+
/* object replacement */
#define LOOKUP_REPLACE_OBJECT 1
#define LOOKUP_UNKNOWN_OBJECT 2
extern void assert_sha1_type(const unsigned char *sha1, enum object_type expect);
+/* Helper to check and "touch" a file */
+extern int check_and_freshen_file(const char *fn, int freshen);
+
extern const signed char hexval_table[256];
static inline unsigned int hexval(unsigned char c)
{
struct object_context {
unsigned char tree[20];
- char path[PATH_MAX];
unsigned mode;
/*
* symlink_path is only used by get_tree_entry_follow_symlinks,
* and only for symlinks that point outside the repository.
*/
struct strbuf symlink_path;
+ /*
+ * If GET_SHA1_RECORD_PATH is set, this will record path (if any)
+ * found when resolving the name. The caller is responsible for
+ * releasing the memory.
+ */
+ char *path;
};
#define GET_SHA1_QUIETLY 01
#define GET_SHA1_TREEISH 020
#define GET_SHA1_BLOB 040
#define GET_SHA1_FOLLOW_SYMLINKS 0100
+#define GET_SHA1_RECORD_PATH 0200
#define GET_SHA1_ONLY_TO_DIE 04000
#define GET_SHA1_DISAMBIGUATORS \
extern int get_sha1_treeish(const char *str, unsigned char *sha1);
extern int get_sha1_blob(const char *str, unsigned char *sha1);
extern void maybe_die_on_misspelt_object_name(const char *name, const char *prefix);
-extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc);
+extern int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *oc);
extern int get_oid(const char *str, struct object_id *oid);
-typedef int each_abbrev_fn(const unsigned char *sha1, void *);
+typedef int each_abbrev_fn(const struct object_id *oid, void *);
extern int for_each_abbrev(const char *prefix, each_abbrev_fn, void *);
extern int set_disambiguate_hint_config(const char *var, const char *value);
extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
extern char *oid_to_hex(const struct object_id *oid); /* same static buffer as sha1_to_hex */
+/*
+ * Parse a 40-character hexadecimal object ID starting from hex, updating the
+ * pointer specified by end when parsing stops. The resulting object ID is
+ * stored in oid. Returns 0 on success. Parsing will stop on the first NUL or
+ * other invalid character. end is only updated on success; otherwise, it is
+ * unmodified.
+ */
+extern int parse_oid_hex(const char *hex, struct object_id *oid, const char **end);
+
/*
* This reads short-hand syntax that not only evaluates to a commit
* object name, but also can act as if the end user spelled the name
extern void pack_report(void);
/*
- * Create a temporary file rooted in the object database directory.
+ * Create a temporary file rooted in the object database directory, or
+ * die on failure. The filename is taken from "pattern", which should have the
+ * usual "XXXXXX" trailer, and the resulting filename is written into the
+ * "template" buffer. Returns the open descriptor.
*/
-extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
+extern int odb_mkstemp(struct strbuf *template, const char *pattern);
/*
* Generate the filename to be used for a pack file with checksum "sha1" and
* error.
*/
extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n);
+/*
+ * Like nth_packed_object_sha1, but write the data into the object specified by
+ * the the first argument. Returns the first argument on success, and NULL on
+ * error.
+ */
+extern const struct object_id *nth_packed_object_oid(struct object_id *, struct packed_git *, uint32_t n);
/*
* Return the offset of the nth object within the specified packfile.
* scratch buffer, but restored to its original contents before
* the function returns.
*/
-typedef int each_loose_object_fn(const unsigned char *sha1,
+typedef int each_loose_object_fn(const struct object_id *oid,
const char *path,
void *data);
typedef int each_loose_cruft_fn(const char *basename,
* LOCAL_ONLY flag is set).
*/
#define FOR_EACH_OBJECT_LOCAL_ONLY 0x1
-typedef int each_packed_object_fn(const unsigned char *sha1,
+typedef int each_packed_object_fn(const struct object_id *oid,
struct packed_git *pack,
uint32_t pos,
void *data);
CONFIG_ORIGIN_CMDLINE
};
+struct config_options {
+ unsigned int respect_includes : 1;
+ const char *git_dir;
+};
+
typedef int (*config_fn_t)(const char *, const char *, void *);
extern int git_default_config(const char *, const char *, void *);
extern int git_config_from_file(config_fn_t fn, const char *, void *);
const unsigned char *sha1, void *data);
extern void git_config_push_parameter(const char *text);
extern int git_config_from_parameters(config_fn_t fn, void *data);
+extern void read_early_config(config_fn_t cb, void *data);
extern void git_config(config_fn_t fn, void *);
extern int git_config_with_options(config_fn_t fn, void *,
struct git_config_source *config_source,
- int respect_includes);
+ const struct config_options *opts);
extern int git_parse_ulong(const char *, unsigned long *);
extern int git_parse_maybe_bool(const char *);
extern int git_config_int(const char *, const char *);
extern int64_t git_config_int64(const char *, const char *);
extern unsigned long git_config_ulong(const char *, const char *);
+extern ssize_t git_config_ssize_t(const char *, const char *);
extern int git_config_bool_or_int(const char *, const char *, int *);
extern int git_config_bool(const char *, const char *);
extern int git_config_maybe_bool(const char *, const char *);
int depth;
config_fn_t fn;
void *data;
+ const struct config_options *opts;
};
#define CONFIG_INCLUDE_INIT { 0 }
extern int git_config_include(const char *name, const char *value, void *data);
extern int git_config_get_maybe_bool(const char *key, int *dest);
extern int git_config_get_pathname(const char *key, const char **dest);
extern int git_config_get_untracked_cache(void);
+extern int git_config_get_split_index(void);
+extern int git_config_get_max_percent_split_change(void);
+
+/* This dies if the configured or default date is in the future */
+extern int git_config_get_expiry(const char *key, const char **output);
/*
* This is a hack for test programs like test-dump-untracked-cache to
check_refname_format(target, REFNAME_ALLOW_ONELEVEL))
/* "symref=bogus:pair */
goto reject;
- item = string_list_append(symref, sym);
+ item = string_list_append_nodup(symref, sym);
item->util = target;
return;
reject:
*/
struct ref **get_remote_heads(int in, char *src_buf, size_t src_len,
struct ref **list, unsigned int flags,
- struct sha1_array *extra_have,
- struct sha1_array *shallow_points)
+ struct oid_array *extra_have,
+ struct oid_array *shallow_points)
{
struct ref **orig_list = list;
die("protocol error: expected shallow sha-1, got '%s'", arg);
if (!shallow_points)
die("repository on the other end cannot be shallow");
- sha1_array_append(shallow_points, old_oid.hash);
+ oid_array_append(shallow_points, &old_oid);
continue;
}
}
if (extra_have && !strcmp(name, ".have")) {
- sha1_array_append(extra_have, old_oid.hash);
+ oid_array_append(extra_have, &old_oid);
continue;
}
get_host_and_port(&host, &port);
+ if (looks_like_command_line_option(host))
+ die("strange hostname '%s' blocked", host);
+ if (looks_like_command_line_option(port))
+ die("strange port '%s' blocked", port);
+
proxy = xmalloc(sizeof(*proxy));
child_process_init(proxy);
argv_array_push(&proxy->args, git_proxy_command);
return NULL;
}
+static int override_ssh_variant(int *port_option, int *needs_batch)
+{
+ char *variant;
+
+ variant = xstrdup_or_null(getenv("GIT_SSH_VARIANT"));
+ if (!variant &&
+ git_config_get_string("ssh.variant", &variant))
+ return 0;
+
+ if (!strcmp(variant, "plink") || !strcmp(variant, "putty")) {
+ *port_option = 'P';
+ *needs_batch = 0;
+ } else if (!strcmp(variant, "tortoiseplink")) {
+ *port_option = 'P';
+ *needs_batch = 1;
+ } else {
+ *port_option = 'p';
+ *needs_batch = 0;
+ }
+ free(variant);
+ return 1;
+}
+
+static void handle_ssh_variant(const char *ssh_command, int is_cmdline,
+ int *port_option, int *needs_batch)
+{
+ const char *variant;
+ char *p = NULL;
+
+ if (override_ssh_variant(port_option, needs_batch))
+ return;
+
+ if (!is_cmdline) {
+ p = xstrdup(ssh_command);
+ variant = basename(p);
+ } else {
+ const char **ssh_argv;
+
+ p = xstrdup(ssh_command);
+ if (split_cmdline(p, &ssh_argv) > 0) {
+ variant = basename((char *)ssh_argv[0]);
+ /*
+ * At this point, variant points into the buffer
+ * referenced by p, hence we do not need ssh_argv
+ * any longer.
+ */
+ free(ssh_argv);
+ } else {
+ free(p);
+ return;
+ }
+ }
+
+ if (!strcasecmp(variant, "plink") ||
+ !strcasecmp(variant, "plink.exe"))
+ *port_option = 'P';
+ else if (!strcasecmp(variant, "tortoiseplink") ||
+ !strcasecmp(variant, "tortoiseplink.exe")) {
+ *port_option = 'P';
+ *needs_batch = 1;
+ }
+ free(p);
+}
+
/*
* This returns a dummy child_process if the transport protocol does not
* need fork(2), or a struct child_process object if it does. Once done,
conn = xmalloc(sizeof(*conn));
child_process_init(conn);
+ if (looks_like_command_line_option(path))
+ die("strange pathname '%s' blocked", path);
+
strbuf_addstr(&cmd, prog);
strbuf_addch(&cmd, ' ');
sq_quote_buf(&cmd, path);
conn->in = conn->out = -1;
if (protocol == PROTO_SSH) {
const char *ssh;
- int putty = 0, tortoiseplink = 0;
+ int needs_batch = 0;
+ int port_option = 'p';
char *ssh_host = hostandport;
const char *port = NULL;
transport_check_allowed("ssh");
return NULL;
}
+ if (looks_like_command_line_option(ssh_host))
+ die("strange hostname '%s' blocked", ssh_host);
+
ssh = get_ssh_command();
- if (!ssh) {
- const char *base;
- char *ssh_dup;
-
+ if (ssh)
+ handle_ssh_variant(ssh, 1, &port_option,
+ &needs_batch);
+ else {
/*
* GIT_SSH is the no-shell version of
* GIT_SSH_COMMAND (and must remain so for
ssh = getenv("GIT_SSH");
if (!ssh)
ssh = "ssh";
-
- ssh_dup = xstrdup(ssh);
- base = basename(ssh_dup);
-
- tortoiseplink = !strcasecmp(base, "tortoiseplink") ||
- !strcasecmp(base, "tortoiseplink.exe");
- putty = tortoiseplink ||
- !strcasecmp(base, "plink") ||
- !strcasecmp(base, "plink.exe");
-
- free(ssh_dup);
+ else
+ handle_ssh_variant(ssh, 0,
+ &port_option,
+ &needs_batch);
}
argv_array_push(&conn->args, ssh);
argv_array_push(&conn->args, "-4");
else if (flags & CONNECT_IPV6)
argv_array_push(&conn->args, "-6");
- if (tortoiseplink)
+ if (needs_batch)
argv_array_push(&conn->args, "-batch");
if (port) {
- /* P is for PuTTY, p is for OpenSSH */
- argv_array_push(&conn->args, putty ? "-P" : "-p");
+ argv_array_pushf(&conn->args,
+ "-%c", port_option);
argv_array_push(&conn->args, port);
}
argv_array_push(&conn->args, ssh_host);
}
/* Returns 0 on success, negative on failure. */
-#define SUBMODULE_PATH_ERR_NOT_CONFIGURED -1
static int do_submodule_path(struct strbuf *buf, const char *path,
const char *fmt, va_list args)
{
- const char *git_dir;
struct strbuf git_submodule_common_dir = STRBUF_INIT;
struct strbuf git_submodule_dir = STRBUF_INIT;
- const struct submodule *sub;
- int err = 0;
+ int ret;
- strbuf_addstr(buf, path);
- strbuf_complete(buf, '/');
- strbuf_addstr(buf, ".git");
-
- git_dir = read_gitfile(buf->buf);
- if (git_dir) {
- strbuf_reset(buf);
- strbuf_addstr(buf, git_dir);
- }
- if (!is_git_directory(buf->buf)) {
- gitmodules_config();
- sub = submodule_from_path(null_sha1, path);
- if (!sub) {
- err = SUBMODULE_PATH_ERR_NOT_CONFIGURED;
- goto cleanup;
- }
- strbuf_reset(buf);
- strbuf_git_path(buf, "%s/%s", "modules", sub->name);
- }
-
- strbuf_addch(buf, '/');
- strbuf_addbuf(&git_submodule_dir, buf);
+ ret = submodule_to_gitdir(&git_submodule_dir, path);
+ if (ret)
+ goto cleanup;
+ strbuf_complete(&git_submodule_dir, '/');
+ strbuf_addbuf(buf, &git_submodule_dir);
strbuf_vaddf(buf, fmt, args);
if (get_common_dir_noenv(&git_submodule_common_dir, git_submodule_dir.buf))
cleanup:
strbuf_release(&git_submodule_dir);
strbuf_release(&git_submodule_common_dir);
-
- return err;
+ return ret;
}
char *git_pathdup_submodule(const char *path, const char *fmt, ...)
* Return a string with ~ and ~user expanded via getpw*. If buf != NULL,
* then it is a newly allocated string. Returns NULL on getpw failure or
* if path is NULL.
+ *
+ * If real_home is true, real_path($HOME) is used in the expansion.
*/
-char *expand_user_path(const char *path)
+char *expand_user_path(const char *path, int real_home)
{
struct strbuf user_path = STRBUF_INIT;
const char *to_copy = path;
const char *home = getenv("HOME");
if (!home)
goto return_null;
- strbuf_addstr(&user_path, home);
+ if (real_home)
+ strbuf_addstr(&user_path, real_path(home));
+ else
+ strbuf_addstr(&user_path, home);
#ifdef GIT_WINDOWS_NATIVE
convert_slashes(user_path.buf);
#endif
strbuf_add(&validated_path, path, len);
if (used_path.buf[0] == '~') {
- char *newpath = expand_user_path(used_path.buf);
+ char *newpath = expand_user_path(used_path.buf, 0);
if (!newpath)
return NULL;
strbuf_attach(&used_path, newpath, strlen(newpath),
}
}
+ int looks_like_command_line_option(const char *str)
+ {
+ return str && str[0] == '-';
+ }
+
char *xdg_config_home(const char *filename)
{
const char *home, *config_home;
return NULL;
}
+char *xdg_cache_home(const char *filename)
+{
+ const char *home, *cache_home;
+
+ assert(filename);
+ cache_home = getenv("XDG_CACHE_HOME");
+ if (cache_home && *cache_home)
+ return mkpathdup("%s/git/%s", cache_home, filename);
+
+ home = getenv("HOME");
+ if (home)
+ return mkpathdup("%s/.cache/git/%s", home, filename);
+ return NULL;
+}
+
GIT_PATH_FUNC(git_path_cherry_pick_head, "CHERRY_PICK_HEAD")
GIT_PATH_FUNC(git_path_revert_head, "REVERT_HEAD")
GIT_PATH_FUNC(git_path_squash_msg, "SQUASH_MSG")