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Do not load user or system gitconfig and gitattributes

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While doing any kind of git loading, unset HOME variables and set
NOSYSTEM variables so that cgit does not load any settings that a user
may have set for his own /usr/bin/git usage.

This fixes a fatal error introduced with git 1.8, whereupon git would
fatally exit when failing to access particular files.

The result of this is that only repo-local configuration files are
accessed:

zx2c4@thinkpad ~/Projects/cgit $ HOME=/root QUERY_STRING="url=foo/log"
CGIT_CONFIG=tests/trash/cgitrc strace -e access ./cgit >/dev/null
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
access("repos/foo/.git/objects", X_OK) = 0
access("repos/foo/.git/refs", X_OK) = 0
access("repos/foo/.git/config", R_OK) = 0
access("repos/foo/.git/config", R_OK) = 0
access("repos/foo/.git/objects/b3/bafdbf0183f4897ef8b1319cb8c490ed54717e", F_OK) = 0
access("repos/foo/.git/objects/b3/bafdbf0183f4897ef8b1319cb8c490ed54717e", F_OK) = 0
access("repos/foo/.git/objects/b3/bafdbf0183f4897ef8b1319cb8c490ed54717e", F_OK) = 0
access("repos/foo/.git/objects/b3/bafdbf0183f4897ef8b1319cb8c490ed54717e", F_OK) = 0
+++ exited with 0 +++

Reported-by: Ferry Huberts <ferry.huberts@pelagic.nl>
Tested-by: Jason A. Donenfeld <Jason@zx2c4.com>
Tested-by: Ferry Huberts <ferry.huberts@pelagic.nl>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2013-04-08 21:12:19 +02:00
parent fb3655df3b
commit 8a92df033e
3 changed files with 24 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
cgit.c
View File

@ -459,12 +459,36 @@ static char *guess_defbranch(void)
static int prepare_repo_cmd(struct cgit_context *ctx)
{
char *user_home;
char *xdg_home;
unsigned char sha1[20];
int nongit = 0;
int rc;
/* The path to the git repository. */
setenv("GIT_DIR", ctx->repo->path, 1);
/* Do not look in /etc/ for gitconfig and gitattributes. */
setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
setenv("GIT_ATTR_NOSYSTEM", "1", 1);
/* We unset HOME and XDG_CONFIG_HOME before calling the git setup function
* so that we don't make unneccessary filesystem accesses. */
user_home = getenv("HOME");
xdg_home = getenv("XDG_CONFIG_HOME");
unsetenv("HOME");
unsetenv("XDG_CONFIG_HOME");
/* Setup the git directory and initialize the notes system. Both of these
* load local configuration from the git repository, so we do them both while
* the HOME variables are unset. */
setup_git_directory_gently(&nongit);
init_display_notes(NULL);
/* We restore the unset variables afterward. */
setenv("HOME", user_home, 1);
setenv("XDG_CONFIG_HOME", xdg_home, 1);
if (nongit) {
const char *name = ctx->repo->name;
rc = errno;

1
ui-commit.c
View File

@ -37,7 +37,6 @@ void cgit_print_commit(char *hex, const char *prefix)
}
info = cgit_parse_commit(commit);
init_display_notes(NULL);
format_display_notes(sha1, &notes, PAGE_ENCODING, 0);
load_ref_decorations(DECORATE_FULL_REFS);

1
ui-log.c
View File

@ -403,7 +403,6 @@ void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern
commit->parents = NULL;
}
init_display_notes(NULL);
for (i = 0; i < cnt && (commit = get_revision(&rev)) != NULL; i++) {
print_commit(commit, &rev);
free(commit->buffer);