These config variables are parsed to substitute ~ and ~user with getpw
entries.
user_path() refactored into new function expand_user_path(), to allow
dynamically allocating the return buffer.
Original patch by Karl Chen, modified by Matthieu Moy, and further
amended by Junio C Hamano.
Signed-off-by: Karl Chen <quarl@xxxxxxxxx>
Signed-off-by: Matthieu Moy <Matthieu.Moy@xxxxxxx>
---
"Oops, I did it again :-("
Just a style issue since v3 (char * home -> char *home), sorry for the noise.
Documentation/config.txt | 7 +++-
builtin-commit.c | 2 +-
cache.h | 2 +
config.c | 12 ++++++-
path.c | 83 +++++++++++++++++++++++++++------------------
5 files changed, 69 insertions(+), 37 deletions(-)
diff --git a/Documentation/config.txt b/Documentation/config.txt
index 78ee906..b4fe843 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -380,8 +380,9 @@ Common unit suffixes of 'k', 'm', or 'g' are supported.
core.excludesfile::
In addition to '.gitignore' (per-directory) and
'.git/info/exclude', git looks into this file for patterns
- of files which are not meant to be tracked. See
- linkgit:gitignore[5].
+ of files which are not meant to be tracked. "~/" is expanded
+ to the value of `$HOME` and "~user/" to the specified user's
+ home directory. See linkgit:gitignore[5].
core.editor::
Commands such as `commit` and `tag` that lets you edit
@@ -681,6 +682,8 @@ color.ui::
commit.template::
Specify a file to use as the template for new commit messages.
+ "~/" is expanded to the value of `$HOME` and "~user/" to the
+ specified user's home directory.
diff.autorefreshindex::
When using 'git-diff' to compare with work tree
diff --git a/builtin-commit.c b/builtin-commit.c
index 0fd7af6..87d1b90 100644
--- a/builtin-commit.c
+++ b/builtin-commit.c
@@ -1175,7 +1175,7 @@ static int git_commit_config(const char *k, const char *v, void *cb)
struct wt_status *s = cb;
if (!strcmp(k, "commit.template"))
- return git_config_string(&template_file, k, v);
+ return git_config_pathname(&template_file, k, v);
return git_status_config(k, v, s);
}
diff --git a/cache.h b/cache.h
index f7533ff..2ba9690 100644
--- a/cache.h
+++ b/cache.h
@@ -649,6 +649,7 @@ int set_shared_perm(const char *path, int mode);
#define adjust_shared_perm(path) set_shared_perm((path), 0)
int safe_create_leading_directories(char *path);
int safe_create_leading_directories_const(const char *path);
+extern char *expand_user_path(const char *path);
char *enter_repo(char *path, int strict);
static inline int is_absolute_path(const char *path)
{
@@ -909,6 +910,7 @@ extern unsigned long git_config_ulong(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_string(const char **, const char *, const char *);
+extern int git_config_pathname(const char **, const char *, const char *);
extern int git_config_set(const char *, const char *);
extern int git_config_set_multivar(const char *, const char *, const char *, int);
extern int git_config_rename_section(const char *, const char *);
diff --git a/config.c b/config.c
index 51f2208..37385ce 100644
--- a/config.c
+++ b/config.c
@@ -351,6 +351,16 @@ int git_config_string(const char **dest, const char *var, const char *value)
return 0;
}
+int git_config_pathname(const char **dest, const char *var, const char *value)
+{
+ if (!value)
+ return config_error_nonbool(var);
+ *dest = expand_user_path(value);
+ if (!*dest)
+ die("Failed to expand user dir in: '%s'", value);
+ return 0;
+}
+
static int git_default_core_config(const char *var, const char *value)
{
/* This needs a better name */
@@ -479,7 +489,7 @@ static int git_default_core_config(const char *var, const char *value)
return git_config_string(&editor_program, var, value);
if (!strcmp(var, "core.excludesfile"))
- return git_config_string(&excludes_file, var, value);
+ return git_config_pathname(&excludes_file, var, value);
if (!strcmp(var, "core.whitespace")) {
if (!value)
diff --git a/path.c b/path.c
index c7679be..2ec950b 100644
--- a/path.c
+++ b/path.c
@@ -11,6 +11,7 @@
* which is what it's designed for.
*/
#include "cache.h"
+#include "strbuf.h"
static char bad_path[] = "/bad-path/";
@@ -207,43 +208,49 @@ int validate_headref(const char *path)
return -1;
}
-static char *user_path(char *buf, char *path, int sz)
+static struct passwd *getpw_str(const char *username, size_t len)
{
struct passwd *pw;
- char *slash;
- int len, baselen;
+ char *username_z = xmalloc(len + 1);
+ memcpy(username_z, username, len);
+ username_z[len] = '\0';
+ pw = getpwnam(username_z);
+ free(username_z);
+ return pw;
+}
- if (!path || path[0] != '~')
- return NULL;
- path++;
- slash = strchr(path, '/');
- if (path[0] == '/' || !path[0]) {
- pw = getpwuid(getuid());
- }
- else {
- if (slash) {
- *slash = 0;
- pw = getpwnam(path);
- *slash = '/';
+/*
+ * 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.
+ */
+char *expand_user_path(const char *path)
+{
+ struct strbuf user_path = STRBUF_INIT;
+ const char *first_slash = strchrnul(path, '/');
+ const char *to_copy = path;
+
+ if (path == NULL)
+ goto return_null;
+ if (path[0] == '~') {
+ const char *username = path + 1;
+ size_t username_len = first_slash - username;
+ if (username_len == 0) {
+ const char *home = getenv("HOME");
+ strbuf_add(&user_path, home, strlen(home));
+ } else {
+ struct passwd *pw = getpw_str(username, username_len);
+ if (!pw)
+ goto return_null;
+ strbuf_add(&user_path, pw->pw_dir, strlen(pw->pw_dir));
}
- else
- pw = getpwnam(path);
+ to_copy = first_slash;
}
- if (!pw || !pw->pw_dir || sz <= strlen(pw->pw_dir))
- return NULL;
- baselen = strlen(pw->pw_dir);
- memcpy(buf, pw->pw_dir, baselen);
- while ((1 < baselen) && (buf[baselen-1] == '/')) {
- buf[baselen-1] = 0;
- baselen--;
- }
- if (slash && slash[1]) {
- len = strlen(slash);
- if (sz <= baselen + len)
- return NULL;
- memcpy(buf + baselen, slash, len + 1);
- }
- return buf;
+ strbuf_add(&user_path, to_copy, strlen(to_copy));
+ return strbuf_detach(&user_path, NULL);
+return_null:
+ strbuf_release(&user_path);
+ return NULL;
}
/*
@@ -291,8 +298,18 @@ char *enter_repo(char *path, int strict)
if (PATH_MAX <= len)
return NULL;
if (path[0] == '~') {
- if (!user_path(used_path, path, PATH_MAX))
+ char *newpath = expand_user_path(path);
+ if (!newpath || (PATH_MAX - 10 < strlen(newpath))) {
+ free(newpath);
return NULL;
+ }
+ /*
+ * Copy back into the static buffer. A pity
+ * since newpath was not bounded, but other
+ * branches of the if are limited by PATH_MAX
+ * anyway.
+ */
+ strcpy(used_path, newpath); free(newpath);
strcpy(validated_path, path);
path = used_path;
}
--
1.6.5.2.152.gbbe9e
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