mirrors/git
1
0
Fork 0
mirror of https://github.com/git/git.git synced 2024-11-01 06:47:52 +01:00
Code Activity
git/builtin/config.c
Jeff King 0e5bba53af add UNLEAK annotation for reducing leak false positives 
It's a common pattern in git commands to allocate some
memory that should last for the lifetime of the program and
then not bother to free it, relying on the OS to throw it
away.

This keeps the code simple, and it's fast (we don't waste
time traversing structures or calling free at the end of the
program). But it also triggers warnings from memory-leak
checkers like valgrind or LSAN. They know that the memory
was still allocated at program exit, but they don't know
_when_ the leaked memory stopped being useful. If it was
early in the program, then it's probably a real and
important leak. But if it was used right up until program
exit, it's not an interesting leak and we'd like to suppress
it so that we can see the real leaks.

This patch introduces an UNLEAK() macro that lets us do so.
To understand its design, let's first look at some of the
alternatives.

Unfortunately the suppression systems offered by
leak-checking tools don't quite do what we want. A
leak-checker basically knows two things:

  1. Which blocks were allocated via malloc, and the
     callstack during the allocation.

  2. Which blocks were left un-freed at the end of the
     program (and which are unreachable, but more on that
     later).

Their suppressions work by mentioning the function or
callstack of a particular allocation, and marking it as OK
to leak.  So imagine you have code like this:

  int cmd_foo(...)
  {
	/* this allocates some memory */
	char *p = some_function();
	printf("%s", p);
	return 0;
  }

You can say "ignore allocations from some_function(),
they're not leaks". But that's not right. That function may
be called elsewhere, too, and we would potentially want to
know about those leaks.

So you can say "ignore the callstack when main calls
some_function".  That works, but your annotations are
brittle. In this case it's only two functions, but you can
imagine that the actual allocation is much deeper. If any of
the intermediate code changes, you have to update the
suppression.

What we _really_ want to say is that "the value assigned to
p at the end of the function is not a real leak". But
leak-checkers can't understand that; they don't know about
"p" in the first place.

However, we can do something a little bit tricky if we make
some assumptions about how leak-checkers work. They
generally don't just report all un-freed blocks. That would
report even globals which are still accessible when the
leak-check is run.  Instead they take some set of memory
(like BSS) as a root and mark it as "reachable". Then they
scan the reachable blocks for anything that looks like a
pointer to a malloc'd block, and consider that block
reachable. And then they scan those blocks, and so on,
transitively marking anything reachable from a global as
"not leaked" (or at least leaked in a different category).

So we can mark the value of "p" as reachable by putting it
into a variable with program lifetime. One way to do that is
to just mark "p" as static. But that actually affects the
run-time behavior if the function is called twice (you
aren't likely to call main() twice, but some of our cmd_*()
functions are called from other commands).

Instead, we can trick the leak-checker by putting the value
into _any_ reachable bytes. This patch keeps a global
linked-list of bytes copied from "unleaked" variables. That
list is reachable even at program exit, which confers
recursive reachability on whatever values we unleak.

In other words, you can do:

  int cmd_foo(...)
  {
	char *p = some_function();
	printf("%s", p);
	UNLEAK(p);
	return 0;
  }

to annotate "p" and suppress the leak report.

But wait, couldn't we just say "free(p)"? In this toy
example, yes. But UNLEAK()'s byte-copying strategy has
several advantages over actually freeing the memory:

  1. It's recursive across structures. In many cases our "p"
     is not just a pointer, but a complex struct whose
     fields may have been allocated by a sub-function. And
     in some cases (e.g., dir_struct) we don't even have a
     function which knows how to free all of the struct
     members.

     By marking the struct itself as reachable, that confers
     reachability on any pointers it contains (including those
     found in embedded structs, or reachable by walking
     heap blocks recursively.

  2. It works on cases where we're not sure if the value is
     allocated or not. For example:

       char *p = argc > 1 ? argv[1] : some_function();

     It's safe to use UNLEAK(p) here, because it's not
     freeing any memory. In the case that we're pointing to
     argv here, the reachability checker will just ignore
     our bytes.

  3. Likewise, it works even if the variable has _already_
     been freed. We're just copying the pointer bytes. If
     the block has been freed, the leak-checker will skip
     over those bytes as uninteresting.

  4. Because it's not actually freeing memory, you can
     UNLEAK() before we are finished accessing the variable.
     This is helpful in cases like this:

       char *p = some_function();
       return another_function(p);

     Writing this with free() requires:

       int ret;
       char *p = some_function();
       ret = another_function(p);
       free(p);
       return ret;

     But with unleak we can just write:

       char *p = some_function();
       UNLEAK(p);
       return another_function(p);

This patch adds the UNLEAK() macro and enables it
automatically when Git is compiled with SANITIZE=leak.  In
normal builds it's a noop, so we pay no runtime cost.

It also adds some UNLEAK() annotations to show off how the
feature works. On top of other recent leak fixes, these are
enough to get t0000 and t0001 to pass when compiled with
LSAN.

Note the case in commit.c which actually converts a
strbuf_release() into an UNLEAK. This code was already
non-leaky, but the free didn't do anything useful, since
we're exiting. Converting it to an annotation means that
non-leak-checking builds pay no runtime cost. The cost is
minimal enough that it's probably not worth going on a
crusade to convert these kinds of frees to UNLEAKS. I did it
here for consistency with the "sb" leak (though it would
have been equally correct to go the other way, and turn them
both into strbuf_release() calls).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-09-08 15:43:17 +09:00

736 lines
21 KiB
C
Raw Blame History

#include "builtin.h"
#include "cache.h"
#include "config.h"
#include "color.h"
#include "parse-options.h"
#include "urlmatch.h"
#include "quote.h"
static const char *const builtin_config_usage[] = {
N_("git config [<options>]"),
NULL
};
static char *key;
static regex_t *key_regexp;
static regex_t *regexp;
static int show_keys;
static int omit_values;
static int use_key_regexp;
static int do_all;
static int do_not_match;
static char delim = '=';
static char key_delim = ' ';
static char term = '\n';
static int use_global_config, use_system_config, use_local_config;
static struct git_config_source given_config_source;
static int actions, types;
static int end_null;
static int respect_includes_opt = -1;
static struct config_options config_options;
static int show_origin;
#define ACTION_GET (1<<0)
#define ACTION_GET_ALL (1<<1)
#define ACTION_GET_REGEXP (1<<2)
#define ACTION_REPLACE_ALL (1<<3)
#define ACTION_ADD (1<<4)
#define ACTION_UNSET (1<<5)
#define ACTION_UNSET_ALL (1<<6)
#define ACTION_RENAME_SECTION (1<<7)
#define ACTION_REMOVE_SECTION (1<<8)
#define ACTION_LIST (1<<9)
#define ACTION_EDIT (1<<10)
#define ACTION_SET (1<<11)
#define ACTION_SET_ALL (1<<12)
#define ACTION_GET_COLOR (1<<13)
#define ACTION_GET_COLORBOOL (1<<14)
#define ACTION_GET_URLMATCH (1<<15)
#define TYPE_BOOL (1<<0)
#define TYPE_INT (1<<1)
#define TYPE_BOOL_OR_INT (1<<2)
#define TYPE_PATH (1<<3)
static struct option builtin_config_options[] = {
OPT_GROUP(N_("Config file location")),
OPT_BOOL(0, "global", &use_global_config, N_("use global config file")),
OPT_BOOL(0, "system", &use_system_config, N_("use system config file")),
OPT_BOOL(0, "local", &use_local_config, N_("use repository config file")),
OPT_STRING('f', "file", &given_config_source.file, N_("file"), N_("use given config file")),
OPT_STRING(0, "blob", &given_config_source.blob, N_("blob-id"), N_("read config from given blob object")),
OPT_GROUP(N_("Action")),
OPT_BIT(0, "get", &actions, N_("get value: name [value-regex]"), ACTION_GET),
OPT_BIT(0, "get-all", &actions, N_("get all values: key [value-regex]"), ACTION_GET_ALL),
OPT_BIT(0, "get-regexp", &actions, N_("get values for regexp: name-regex [value-regex]"), ACTION_GET_REGEXP),
OPT_BIT(0, "get-urlmatch", &actions, N_("get value specific for the URL: section[.var] URL"), ACTION_GET_URLMATCH),
OPT_BIT(0, "replace-all", &actions, N_("replace all matching variables: name value [value_regex]"), ACTION_REPLACE_ALL),
OPT_BIT(0, "add", &actions, N_("add a new variable: name value"), ACTION_ADD),
OPT_BIT(0, "unset", &actions, N_("remove a variable: name [value-regex]"), ACTION_UNSET),
OPT_BIT(0, "unset-all", &actions, N_("remove all matches: name [value-regex]"), ACTION_UNSET_ALL),
OPT_BIT(0, "rename-section", &actions, N_("rename section: old-name new-name"), ACTION_RENAME_SECTION),
OPT_BIT(0, "remove-section", &actions, N_("remove a section: name"), ACTION_REMOVE_SECTION),
OPT_BIT('l', "list", &actions, N_("list all"), ACTION_LIST),
OPT_BIT('e', "edit", &actions, N_("open an editor"), ACTION_EDIT),
OPT_BIT(0, "get-color", &actions, N_("find the color configured: slot [default]"), ACTION_GET_COLOR),
OPT_BIT(0, "get-colorbool", &actions, N_("find the color setting: slot [stdout-is-tty]"), ACTION_GET_COLORBOOL),
OPT_GROUP(N_("Type")),
OPT_BIT(0, "bool", &types, N_("value is \"true\" or \"false\""), TYPE_BOOL),
OPT_BIT(0, "int", &types, N_("value is decimal number"), TYPE_INT),
OPT_BIT(0, "bool-or-int", &types, N_("value is --bool or --int"), TYPE_BOOL_OR_INT),
OPT_BIT(0, "path", &types, N_("value is a path (file or directory name)"), TYPE_PATH),
OPT_GROUP(N_("Other")),
OPT_BOOL('z', "null", &end_null, N_("terminate values with NUL byte")),
OPT_BOOL(0, "name-only", &omit_values, N_("show variable names only")),
OPT_BOOL(0, "includes", &respect_includes_opt, N_("respect include directives on lookup")),
OPT_BOOL(0, "show-origin", &show_origin, N_("show origin of config (file, standard input, blob, command line)")),
OPT_END(),
};
static void check_argc(int argc, int min, int max) {
if (argc >= min && argc <= max)
return;
error("wrong number of arguments");
usage_with_options(builtin_config_usage, builtin_config_options);
}
static void show_config_origin(struct strbuf *buf)
{
const char term = end_null ? '\0' : '\t';
strbuf_addstr(buf, current_config_origin_type());
strbuf_addch(buf, ':');
if (end_null)
strbuf_addstr(buf, current_config_name());
else
quote_c_style(current_config_name(), buf, NULL, 0);
strbuf_addch(buf, term);
}
static int show_all_config(const char *key_, const char *value_, void *cb)
{
if (show_origin) {
struct strbuf buf = STRBUF_INIT;
show_config_origin(&buf);
/* Use fwrite as "buf" can contain \0's if "end_null" is set. */
fwrite(buf.buf, 1, buf.len, stdout);
strbuf_release(&buf);
}
if (!omit_values && value_)
printf("%s%c%s%c", key_, delim, value_, term);
else
printf("%s%c", key_, term);
return 0;
}
struct strbuf_list {
struct strbuf *items;
int nr;
int alloc;
};
static int format_config(struct strbuf *buf, const char *key_, const char *value_)
{
if (show_origin)
show_config_origin(buf);
if (show_keys)
strbuf_addstr(buf, key_);
if (!omit_values) {
if (show_keys)
strbuf_addch(buf, key_delim);
if (types == TYPE_INT)
strbuf_addf(buf, "%"PRId64,
git_config_int64(key_, value_ ? value_ : ""));
else if (types == TYPE_BOOL)
strbuf_addstr(buf, git_config_bool(key_, value_) ?
"true" : "false");
else if (types == TYPE_BOOL_OR_INT) {
int is_bool, v;
v = git_config_bool_or_int(key_, value_, &is_bool);
if (is_bool)
strbuf_addstr(buf, v ? "true" : "false");
else
strbuf_addf(buf, "%d", v);
} else if (types == TYPE_PATH) {
const char *v;
if (git_config_pathname(&v, key_, value_) < 0)
return -1;
strbuf_addstr(buf, v);
free((char *)v);
} else if (value_) {
strbuf_addstr(buf, value_);
} else {
/* Just show the key name; back out delimiter */
if (show_keys)
strbuf_setlen(buf, buf->len - 1);
}
}
strbuf_addch(buf, term);
return 0;
}
static int collect_config(const char *key_, const char *value_, void *cb)
{
struct strbuf_list *values = cb;
if (!use_key_regexp && strcmp(key_, key))
return 0;
if (use_key_regexp && regexec(key_regexp, key_, 0, NULL, 0))
return 0;
if (regexp != NULL &&
(do_not_match ^ !!regexec(regexp, (value_?value_:""), 0, NULL, 0)))
return 0;
ALLOC_GROW(values->items, values->nr + 1, values->alloc);
strbuf_init(&values->items[values->nr], 0);
return format_config(&values->items[values->nr++], key_, value_);
}
static int get_value(const char *key_, const char *regex_)
{
int ret = CONFIG_GENERIC_ERROR;
struct strbuf_list values = {NULL};
int i;
if (use_key_regexp) {
char *tl;
/*
* NEEDSWORK: this naive pattern lowercasing obviously does not
* work for more complex patterns like "^[^.]*Foo.*bar".
* Perhaps we should deprecate this altogether someday.
*/
key = xstrdup(key_);
for (tl = key + strlen(key) - 1;
tl >= key && *tl != '.';
tl--)
*tl = tolower(*tl);
for (tl = key; *tl && *tl != '.'; tl++)
*tl = tolower(*tl);
key_regexp = (regex_t*)xmalloc(sizeof(regex_t));
if (regcomp(key_regexp, key, REG_EXTENDED)) {
error("invalid key pattern: %s", key_);
FREE_AND_NULL(key_regexp);
ret = CONFIG_INVALID_PATTERN;
goto free_strings;
}
} else {
if (git_config_parse_key(key_, &key, NULL)) {
ret = CONFIG_INVALID_KEY;
goto free_strings;
}
}
if (regex_) {
if (regex_[0] == '!') {
do_not_match = 1;
regex_++;
}
regexp = (regex_t*)xmalloc(sizeof(regex_t));
if (regcomp(regexp, regex_, REG_EXTENDED)) {
error("invalid pattern: %s", regex_);
FREE_AND_NULL(regexp);
ret = CONFIG_INVALID_PATTERN;
goto free_strings;
}
}
config_with_options(collect_config, &values,
&given_config_source, &config_options);
ret = !values.nr;
for (i = 0; i < values.nr; i++) {
struct strbuf *buf = values.items + i;
if (do_all || i == values.nr - 1)
fwrite(buf->buf, 1, buf->len, stdout);
strbuf_release(buf);
}
free(values.items);
free_strings:
free(key);
if (key_regexp) {
regfree(key_regexp);
free(key_regexp);
}
if (regexp) {
regfree(regexp);
free(regexp);
}
return ret;
}
static char *normalize_value(const char *key, const char *value)
{
if (!value)
return NULL;
if (types == 0 || types == TYPE_PATH)
/*
* We don't do normalization for TYPE_PATH here: If
* the path is like ~/foobar/, we prefer to store
* "~/foobar/" in the config file, and to expand the ~
* when retrieving the value.
*/
return xstrdup(value);
if (types == TYPE_INT)
return xstrfmt("%"PRId64, git_config_int64(key, value));
if (types == TYPE_BOOL)
return xstrdup(git_config_bool(key, value) ? "true" : "false");
if (types == TYPE_BOOL_OR_INT) {
int is_bool, v;
v = git_config_bool_or_int(key, value, &is_bool);
if (!is_bool)
return xstrfmt("%d", v);
else
return xstrdup(v ? "true" : "false");
}
die("BUG: cannot normalize type %d", types);
}
static int get_color_found;
static const char *get_color_slot;
static const char *get_colorbool_slot;
static char parsed_color[COLOR_MAXLEN];
static int git_get_color_config(const char *var, const char *value, void *cb)
{
if (!strcmp(var, get_color_slot)) {
if (!value)
config_error_nonbool(var);
if (color_parse(value, parsed_color) < 0)
return -1;
get_color_found = 1;
}
return 0;
}
static void get_color(const char *var, const char *def_color)
{
get_color_slot = var;
get_color_found = 0;
parsed_color[0] = '\0';
config_with_options(git_get_color_config, NULL,
&given_config_source, &config_options);
if (!get_color_found && def_color) {
if (color_parse(def_color, parsed_color) < 0)
die(_("unable to parse default color value"));
}
fputs(parsed_color, stdout);
}
static int get_colorbool_found;
static int get_diff_color_found;
static int get_color_ui_found;
static int git_get_colorbool_config(const char *var, const char *value,
void *cb)
{
if (!strcmp(var, get_colorbool_slot))
get_colorbool_found = git_config_colorbool(var, value);
else if (!strcmp(var, "diff.color"))
get_diff_color_found = git_config_colorbool(var, value);
else if (!strcmp(var, "color.ui"))
get_color_ui_found = git_config_colorbool(var, value);
return 0;
}
static int get_colorbool(const char *var, int print)
{
get_colorbool_slot = var;
get_colorbool_found = -1;
get_diff_color_found = -1;
get_color_ui_found = -1;
config_with_options(git_get_colorbool_config, NULL,
&given_config_source, &config_options);
if (get_colorbool_found < 0) {
if (!strcmp(get_colorbool_slot, "color.diff"))
get_colorbool_found = get_diff_color_found;
if (get_colorbool_found < 0)
get_colorbool_found = get_color_ui_found;
}
if (get_colorbool_found < 0)
/* default value if none found in config */
get_colorbool_found = GIT_COLOR_AUTO;
get_colorbool_found = want_color(get_colorbool_found);
if (print) {
printf("%s\n", get_colorbool_found ? "true" : "false");
return 0;
} else
return get_colorbool_found ? 0 : 1;
}
static void check_write(void)
{
if (!given_config_source.file && !startup_info->have_repository)
die("not in a git directory");
if (given_config_source.use_stdin)
die("writing to stdin is not supported");
if (given_config_source.blob)
die("writing config blobs is not supported");
}
struct urlmatch_current_candidate_value {
char value_is_null;
struct strbuf value;
};
static int urlmatch_collect_fn(const char *var, const char *value, void *cb)
{
struct string_list *values = cb;
struct string_list_item *item = string_list_insert(values, var);
struct urlmatch_current_candidate_value *matched = item->util;
if (!matched) {
matched = xmalloc(sizeof(*matched));
strbuf_init(&matched->value, 0);
item->util = matched;
} else {
strbuf_reset(&matched->value);
}
if (value) {
strbuf_addstr(&matched->value, value);
matched->value_is_null = 0;
} else {
matched->value_is_null = 1;
}
return 0;
}
static int get_urlmatch(const char *var, const char *url)
{
int ret;
char *section_tail;
struct string_list_item *item;
struct urlmatch_config config = { STRING_LIST_INIT_DUP };
struct string_list values = STRING_LIST_INIT_DUP;
config.collect_fn = urlmatch_collect_fn;
config.cascade_fn = NULL;
config.cb = &values;
if (!url_normalize(url, &config.url))
die("%s", config.url.err);
config.section = xstrdup_tolower(var);
section_tail = strchr(config.section, '.');
if (section_tail) {
*section_tail = '\0';
config.key = section_tail + 1;
show_keys = 0;
} else {
config.key = NULL;
show_keys = 1;
}
config_with_options(urlmatch_config_entry, &config,
&given_config_source, &config_options);
ret = !values.nr;
for_each_string_list_item(item, &values) {
struct urlmatch_current_candidate_value *matched = item->util;
struct strbuf buf = STRBUF_INIT;
format_config(&buf, item->string,
matched->value_is_null ? NULL : matched->value.buf);
fwrite(buf.buf, 1, buf.len, stdout);
strbuf_release(&buf);
strbuf_release(&matched->value);
}
string_list_clear(&config.vars, 1);
string_list_clear(&values, 1);
free(config.url.url);
free((void *)config.section);
return ret;
}
static char *default_user_config(void)
{
struct strbuf buf = STRBUF_INIT;
strbuf_addf(&buf,
_("# This is Git's per-user configuration file.\n"
"[user]\n"
"# Please adapt and uncomment the following lines:\n"
"# name = %s\n"
"# email = %s\n"),
ident_default_name(),
ident_default_email());
return strbuf_detach(&buf, NULL);
}
int cmd_config(int argc, const char **argv, const char *prefix)
{
int nongit = !startup_info->have_repository;
char *value;
given_config_source.file = getenv(CONFIG_ENVIRONMENT);
argc = parse_options(argc, argv, prefix, builtin_config_options,
builtin_config_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (use_global_config + use_system_config + use_local_config +
!!given_config_source.file + !!given_config_source.blob > 1) {
error("only one config file at a time.");
usage_with_options(builtin_config_usage, builtin_config_options);
}
if (use_local_config && nongit)
die(_("--local can only be used inside a git repository"));
if (given_config_source.file &&
!strcmp(given_config_source.file, "-")) {
given_config_source.file = NULL;
given_config_source.use_stdin = 1;
}
if (use_global_config) {
char *user_config = expand_user_path("~/.gitconfig", 0);
char *xdg_config = xdg_config_home("config");
if (!user_config)
/*
* It is unknown if HOME/.gitconfig exists, so
* we do not know if we should write to XDG
* location; error out even if XDG_CONFIG_HOME
* is set and points at a sane location.
*/
die("$HOME not set");
if (access_or_warn(user_config, R_OK, 0) &&
xdg_config && !access_or_warn(xdg_config, R_OK, 0)) {
given_config_source.file = xdg_config;
free(user_config);
} else {
given_config_source.file = user_config;
free(xdg_config);
}
}
else if (use_system_config)
given_config_source.file = git_etc_gitconfig();
else if (use_local_config)
given_config_source.file = git_pathdup("config");
else if (given_config_source.file) {
if (!is_absolute_path(given_config_source.file) && prefix)
given_config_source.file =
prefix_filename(prefix, given_config_source.file);
}
if (respect_includes_opt == -1)
config_options.respect_includes = !given_config_source.file;
else
config_options.respect_includes = respect_includes_opt;
if (!nongit) {
config_options.commondir = get_git_common_dir();
config_options.git_dir = get_git_dir();
}
if (end_null) {
term = '\0';
delim = '\n';
key_delim = '\n';
}
if (HAS_MULTI_BITS(types)) {
error("only one type at a time.");
usage_with_options(builtin_config_usage, builtin_config_options);
}
if ((actions & (ACTION_GET_COLOR|ACTION_GET_COLORBOOL)) && types) {
error("--get-color and variable type are incoherent");
usage_with_options(builtin_config_usage, builtin_config_options);
}
if (HAS_MULTI_BITS(actions)) {
error("only one action at a time.");
usage_with_options(builtin_config_usage, builtin_config_options);
}
if (actions == 0)
switch (argc) {
case 1: actions = ACTION_GET; break;
case 2: actions = ACTION_SET; break;
case 3: actions = ACTION_SET_ALL; break;
default:
usage_with_options(builtin_config_usage, builtin_config_options);
}
if (omit_values &&
!(actions == ACTION_LIST || actions == ACTION_GET_REGEXP)) {
error("--name-only is only applicable to --list or --get-regexp");
usage_with_options(builtin_config_usage, builtin_config_options);
}
if (show_origin && !(actions &
(ACTION_GET|ACTION_GET_ALL|ACTION_GET_REGEXP|ACTION_LIST))) {
error("--show-origin is only applicable to --get, --get-all, "
"--get-regexp, and --list.");
usage_with_options(builtin_config_usage, builtin_config_options);
}
if (actions == ACTION_LIST) {
check_argc(argc, 0, 0);
if (config_with_options(show_all_config, NULL,
&given_config_source,
&config_options) < 0) {
if (given_config_source.file)
die_errno("unable to read config file '%s'",
given_config_source.file);
else
die("error processing config file(s)");
}
}
else if (actions == ACTION_EDIT) {
char *config_file;
check_argc(argc, 0, 0);
if (!given_config_source.file && nongit)
die("not in a git directory");
if (given_config_source.use_stdin)
die("editing stdin is not supported");
if (given_config_source.blob)
die("editing blobs is not supported");
git_config(git_default_config, NULL);
config_file = given_config_source.file ?
xstrdup(given_config_source.file) :
git_pathdup("config");
if (use_global_config) {
int fd = open(config_file, O_CREAT | O_EXCL | O_WRONLY, 0666);
if (fd >= 0) {
char *content = default_user_config();
write_str_in_full(fd, content);
free(content);
close(fd);
}
else if (errno != EEXIST)
die_errno(_("cannot create configuration file %s"), config_file);
}
launch_editor(config_file, NULL, NULL);
free(config_file);
}
else if (actions == ACTION_SET) {
int ret;
check_write();
check_argc(argc, 2, 2);
value = normalize_value(argv[0], argv[1]);
UNLEAK(value);
ret = git_config_set_in_file_gently(given_config_source.file, argv[0], value);
if (ret == CONFIG_NOTHING_SET)
error(_("cannot overwrite multiple values with a single value\n"
" Use a regexp, --add or --replace-all to change %s."), argv[0]);
return ret;
}
else if (actions == ACTION_SET_ALL) {
check_write();
check_argc(argc, 2, 3);
value = normalize_value(argv[0], argv[1]);
UNLEAK(value);
return git_config_set_multivar_in_file_gently(given_config_source.file,
argv[0], value, argv[2], 0);
}
else if (actions == ACTION_ADD) {
check_write();
check_argc(argc, 2, 2);
value = normalize_value(argv[0], argv[1]);
UNLEAK(value);
return git_config_set_multivar_in_file_gently(given_config_source.file,
argv[0], value,
CONFIG_REGEX_NONE, 0);
}
else if (actions == ACTION_REPLACE_ALL) {
check_write();
check_argc(argc, 2, 3);
value = normalize_value(argv[0], argv[1]);
UNLEAK(value);
return git_config_set_multivar_in_file_gently(given_config_source.file,
argv[0], value, argv[2], 1);
}
else if (actions == ACTION_GET) {
check_argc(argc, 1, 2);
return get_value(argv[0], argv[1]);
}
else if (actions == ACTION_GET_ALL) {
do_all = 1;
check_argc(argc, 1, 2);
return get_value(argv[0], argv[1]);
}
else if (actions == ACTION_GET_REGEXP) {
show_keys = 1;
use_key_regexp = 1;
do_all = 1;
check_argc(argc, 1, 2);
return get_value(argv[0], argv[1]);
}
else if (actions == ACTION_GET_URLMATCH) {
check_argc(argc, 2, 2);
return get_urlmatch(argv[0], argv[1]);
}
else if (actions == ACTION_UNSET) {
check_write();
check_argc(argc, 1, 2);
if (argc == 2)
return git_config_set_multivar_in_file_gently(given_config_source.file,
argv[0], NULL, argv[1], 0);
else
return git_config_set_in_file_gently(given_config_source.file,
argv[0], NULL);
}
else if (actions == ACTION_UNSET_ALL) {
check_write();
check_argc(argc, 1, 2);
return git_config_set_multivar_in_file_gently(given_config_source.file,
argv[0], NULL, argv[1], 1);
}
else if (actions == ACTION_RENAME_SECTION) {
int ret;
check_write();
check_argc(argc, 2, 2);
ret = git_config_rename_section_in_file(given_config_source.file,
argv[0], argv[1]);
if (ret < 0)
return ret;
if (ret == 0)
die("No such section!");
}
else if (actions == ACTION_REMOVE_SECTION) {
int ret;
check_write();
check_argc(argc, 1, 1);
ret = git_config_rename_section_in_file(given_config_source.file,
argv[0], NULL);
if (ret < 0)
return ret;
if (ret == 0)
die("No such section!");
}
else if (actions == ACTION_GET_COLOR) {
check_argc(argc, 1, 2);
get_color(argv[0], argv[1]);
}
else if (actions == ACTION_GET_COLORBOOL) {
check_argc(argc, 1, 2);
if (argc == 2)
color_stdout_is_tty = git_config_bool("command line", argv[1]);
return get_colorbool(argv[0], argc == 2);
}
return 0;
}
View git blame Copy permalink