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authorJunio C Hamano <gitster@pobox.com>2019-01-29 12:47:53 -0800
committerJunio C Hamano <gitster@pobox.com>2019-01-29 12:47:54 -0800
commit773e4088819cb17150afd4929f32bccabb8e2acd (patch)
tree16a345c12e869466049d0c6641b783c32ed84c83
parent15b07cba0b60f0fc5dea0be0d68a355a8161476d (diff)
parent0da0e9268b4825cafb27bb0e07b43fae30bb33da (diff)
downloadgit-773e4088819cb17150afd4929f32bccabb8e2acd.tar.gz
Merge branch 'jk/save-getenv-result'
There were many places the code relied on the string returned from getenv() to be non-volatile, which is not true, that have been corrected. * jk/save-getenv-result: builtin_diff(): read $GIT_DIFF_OPTS closer to use merge-recursive: copy $GITHEAD strings init: make a copy of $GIT_DIR string config: make a copy of $GIT_CONFIG string commit: copy saved getenv() result get_super_prefix(): copy getenv() result
Diffstat
-rw-r--r--builtin/commit.c3
-rw-r--r--builtin/config.c2
-rw-r--r--builtin/init-db.c6
-rw-r--r--builtin/merge-recursive.c15
-rw-r--r--diff.c5
-rw-r--r--environment.c4
6 files changed, 23 insertions, 12 deletions
diff --git a/builtin/commit.c b/builtin/commit.c
index 004b816635..7d2e0b61e5 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -351,7 +351,7 @@ static const char *prepare_index(int argc, const char **argv, const char *prefix
if (write_locked_index(&the_index, &index_lock, 0))
die(_("unable to create temporary index"));
- old_index_env = getenv(INDEX_ENVIRONMENT);
+ old_index_env = xstrdup_or_null(getenv(INDEX_ENVIRONMENT));
setenv(INDEX_ENVIRONMENT, get_lock_file_path(&index_lock), 1);
if (interactive_add(argc, argv, prefix, patch_interactive) != 0)
@@ -361,6 +361,7 @@ static const char *prepare_index(int argc, const char **argv, const char *prefix
setenv(INDEX_ENVIRONMENT, old_index_env, 1);
else
unsetenv(INDEX_ENVIRONMENT);
+ FREE_AND_NULL(old_index_env);
discard_cache();
read_cache_from(get_lock_file_path(&index_lock));
diff --git a/builtin/config.c b/builtin/config.c
index 99bc7ef64e..98d65bc0ad 100644
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -599,7 +599,7 @@ 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);
+ given_config_source.file = xstrdup_or_null(getenv(CONFIG_ENVIRONMENT));
argc = parse_options(argc, argv, prefix, builtin_config_options,
builtin_config_usage,
diff --git a/builtin/init-db.c b/builtin/init-db.c
index 41faffd28d..93eff7618c 100644
--- a/builtin/init-db.c
+++ b/builtin/init-db.c
@@ -542,8 +542,8 @@ int cmd_init_db(int argc, const char **argv, const char *prefix)
* GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
* without --bare. Catch the error early.
*/
- git_dir = getenv(GIT_DIR_ENVIRONMENT);
- work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
+ git_dir = xstrdup_or_null(getenv(GIT_DIR_ENVIRONMENT));
+ work_tree = xstrdup_or_null(getenv(GIT_WORK_TREE_ENVIRONMENT));
if ((!git_dir || is_bare_repository_cfg == 1) && work_tree)
die(_("%s (or --work-tree=<directory>) not allowed without "
"specifying %s (or --git-dir=<directory>)"),
@@ -582,6 +582,8 @@ int cmd_init_db(int argc, const char **argv, const char *prefix)
}
UNLEAK(real_git_dir);
+ UNLEAK(git_dir);
+ UNLEAK(work_tree);
flags |= INIT_DB_EXIST_OK;
return init_db(git_dir, real_git_dir, template_dir, flags);
diff --git a/builtin/merge-recursive.c b/builtin/merge-recursive.c
index 9b2f707c29..7545136c2a 100644
--- a/builtin/merge-recursive.c
+++ b/builtin/merge-recursive.c
@@ -7,16 +7,16 @@
static const char builtin_merge_recursive_usage[] =
"git %s <base>... -- <head> <remote> ...";
-static const char *better_branch_name(const char *branch)
+static char *better_branch_name(const char *branch)
{
static char githead_env[8 + GIT_MAX_HEXSZ + 1];
char *name;
if (strlen(branch) != the_hash_algo->hexsz)
- return branch;
+ return xstrdup(branch);
xsnprintf(githead_env, sizeof(githead_env), "GITHEAD_%s", branch);
name = getenv(githead_env);
- return name ? name : branch;
+ return xstrdup(name ? name : branch);
}
int cmd_merge_recursive(int argc, const char **argv, const char *prefix)
@@ -26,6 +26,7 @@ int cmd_merge_recursive(int argc, const char **argv, const char *prefix)
int i, failed;
struct object_id h1, h2;
struct merge_options o;
+ char *better1, *better2;
struct commit *result;
init_merge_options(&o);
@@ -70,13 +71,17 @@ int cmd_merge_recursive(int argc, const char **argv, const char *prefix)
if (get_oid(o.branch2, &h2))
die(_("could not resolve ref '%s'"), o.branch2);
- o.branch1 = better_branch_name(o.branch1);
- o.branch2 = better_branch_name(o.branch2);
+ o.branch1 = better1 = better_branch_name(o.branch1);
+ o.branch2 = better2 = better_branch_name(o.branch2);
if (o.verbosity >= 3)
printf(_("Merging %s with %s\n"), o.branch1, o.branch2);
failed = merge_recursive_generic(&o, &h1, &h2, bases_count, bases, &result);
+
+ free(better1);
+ free(better2);
+
if (failed < 0)
return 128; /* die() error code */
return failed;
diff --git a/diff.c b/diff.c
index 084bf54293..e8c3e8081f 100644
--- a/diff.c
+++ b/diff.c
@@ -3544,7 +3544,7 @@ static void builtin_diff(const char *name_a,
o->found_changes = 1;
} else {
/* Crazy xdl interfaces.. */
- const char *diffopts = getenv("GIT_DIFF_OPTS");
+ const char *diffopts;
const char *v;
xpparam_t xpp;
xdemitconf_t xecfg;
@@ -3587,12 +3587,15 @@ static void builtin_diff(const char *name_a,
xecfg.flags |= XDL_EMIT_FUNCCONTEXT;
if (pe)
xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags);
+
+ diffopts = getenv("GIT_DIFF_OPTS");
if (!diffopts)
;
else if (skip_prefix(diffopts, "--unified=", &v))
xecfg.ctxlen = strtoul(v, NULL, 10);
else if (skip_prefix(diffopts, "-u", &v))
xecfg.ctxlen = strtoul(v, NULL, 10);
+
if (o->word_diff)
init_diff_words_data(&ecbdata, o, one, two);
if (xdi_diff_outf(&mf1, &mf2, NULL, fn_out_consume,
diff --git a/environment.c b/environment.c
index 0e37741d83..89af47cb85 100644
--- a/environment.c
+++ b/environment.c
@@ -107,7 +107,7 @@ char *git_work_tree_cfg;
static char *git_namespace;
-static const char *super_prefix;
+static char *super_prefix;
/*
* Repository-local GIT_* environment variables; see cache.h for details.
@@ -240,7 +240,7 @@ const char *get_super_prefix(void)
{
static int initialized;
if (!initialized) {
- super_prefix = getenv(GIT_SUPER_PREFIX_ENVIRONMENT);
+ super_prefix = xstrdup_or_null(getenv(GIT_SUPER_PREFIX_ENVIRONMENT));
initialized = 1;
}
return super_prefix;
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