static void process_log_file(void)
{
struct stat st;
if (fstat(get_lock_file_fd(&log_lock), &st)) {
/*
* Perhaps there was an i/o error or another
* unlikely situation. Try to make a note of
* this in gc.log along with any existing
* messages.
*/
int saved_errno = errno;
fprintf(stderr, _("Failed to fstat %s: %s"),
get_tempfile_path(log_lock.tempfile),
strerror(saved_errno));
fflush(stderr);
commit_lock_file(&log_lock);
errno = saved_errno;
} else if (st.st_size) {
/* There was some error recorded in the lock file */
commit_lock_file(&log_lock);
} else {
/* No error, clean up any old gc.log */
unlink(git_path("gc.log"));
rollback_lock_file(&log_lock);
}
}
char *get_locked_file_path(struct lock_file *lk)
{
struct strbuf ret = STRBUF_INIT;
strbuf_addstr(&ret, get_tempfile_path(&lk->tempfile));
if (ret.len <= LOCK_SUFFIX_LEN ||
strcmp(ret.buf + ret.len - LOCK_SUFFIX_LEN, LOCK_SUFFIX))
die("BUG: get_locked_file_path() called for malformed lock object");
/* remove ".lock": */
strbuf_setlen(&ret, ret.len - LOCK_SUFFIX_LEN);
return strbuf_detach(&ret, NULL);
}
/*
* Write the packed refs from the current snapshot to the packed-refs
* tempfile, incorporating any changes from `updates`. `updates` must
* be a sorted string list whose keys are the refnames and whose util
* values are `struct ref_update *`. On error, rollback the tempfile,
* write an error message to `err`, and return a nonzero value.
*
* The packfile must be locked before calling this function and will
* remain locked when it is done.
*/
static int write_with_updates(struct packed_ref_store *refs,
struct string_list *updates,
struct strbuf *err)
{
struct ref_iterator *iter = NULL;
size_t i;
int ok;
FILE *out;
struct strbuf sb = STRBUF_INIT;
char *packed_refs_path;
if (!is_lock_file_locked(&refs->lock))
die("BUG: write_with_updates() called while unlocked");
/*
* If packed-refs is a symlink, we want to overwrite the
* symlinked-to file, not the symlink itself. Also, put the
* staging file next to it:
*/
packed_refs_path = get_locked_file_path(&refs->lock);
strbuf_addf(&sb, "%s.new", packed_refs_path);
free(packed_refs_path);
refs->tempfile = create_tempfile(sb.buf);
if (!refs->tempfile) {
strbuf_addf(err, "unable to create file %s: %s",
sb.buf, strerror(errno));
strbuf_release(&sb);
return -1;
}
strbuf_release(&sb);
out = fdopen_tempfile(refs->tempfile, "w");
if (!out) {
strbuf_addf(err, "unable to fdopen packed-refs tempfile: %s",
strerror(errno));
goto error;
}
if (fprintf(out, "%s", PACKED_REFS_HEADER) < 0)
goto write_error;
/*
* We iterate in parallel through the current list of refs and
* the list of updates, processing an entry from at least one
* of the lists each time through the loop. When the current
* list of refs is exhausted, set iter to NULL. When the list
* of updates is exhausted, leave i set to updates->nr.
*/
iter = packed_ref_iterator_begin(&refs->base, "",
DO_FOR_EACH_INCLUDE_BROKEN);
if ((ok = ref_iterator_advance(iter)) != ITER_OK)
iter = NULL;
i = 0;
while (iter || i < updates->nr) {
struct ref_update *update = NULL;
int cmp;
if (i >= updates->nr) {
cmp = -1;
} else {
update = updates->items[i].util;
if (!iter)
cmp = +1;
else
cmp = strcmp(iter->refname, update->refname);
}
if (!cmp) {
/*
* There is both an old value and an update
* for this reference. Check the old value if
* necessary:
*/
if ((update->flags & REF_HAVE_OLD)) {
if (is_null_oid(&update->old_oid)) {
strbuf_addf(err, "cannot update ref '%s': "
"reference already exists",
update->refname);
goto error;
} else if (oidcmp(&update->old_oid, iter->oid)) {
strbuf_addf(err, "cannot update ref '%s': "
"is at %s but expected %s",
update->refname,
oid_to_hex(iter->oid),
oid_to_hex(&update->old_oid));
goto error;
}
}
/* Now figure out what to use for the new value: */
if ((update->flags & REF_HAVE_NEW)) {
/*
* The update takes precedence. Skip
* the iterator over the unneeded
* value.
*/
if ((ok = ref_iterator_advance(iter)) != ITER_OK)
iter = NULL;
cmp = +1;
} else {
/*
* The update doesn't actually want to
* change anything. We're done with it.
*/
i++;
cmp = -1;
}
} else if (cmp > 0) {
/*
* There is no old value but there is an
* update for this reference. Make sure that
* the update didn't expect an existing value:
*/
if ((update->flags & REF_HAVE_OLD) &&
!is_null_oid(&update->old_oid)) {
strbuf_addf(err, "cannot update ref '%s': "
"reference is missing but expected %s",
update->refname,
oid_to_hex(&update->old_oid));
goto error;
}
}
if (cmp < 0) {
/* Pass the old reference through. */
struct object_id peeled;
int peel_error = ref_iterator_peel(iter, &peeled);
if (write_packed_entry(out, iter->refname,
iter->oid,
peel_error ? NULL : &peeled))
goto write_error;
if ((ok = ref_iterator_advance(iter)) != ITER_OK)
iter = NULL;
} else if (is_null_oid(&update->new_oid)) {
/*
* The update wants to delete the reference,
* and the reference either didn't exist or we
* have already skipped it. So we're done with
* the update (and don't have to write
* anything).
*/
i++;
} else {
struct object_id peeled;
int peel_error = peel_object(&update->new_oid,
&peeled);
if (write_packed_entry(out, update->refname,
&update->new_oid,
peel_error ? NULL : &peeled))
goto write_error;
i++;
}
}
if (ok != ITER_DONE) {
strbuf_addstr(err, "unable to write packed-refs file: "
"error iterating over old contents");
goto error;
}
if (close_tempfile_gently(refs->tempfile)) {
strbuf_addf(err, "error closing file %s: %s",
get_tempfile_path(refs->tempfile),
strerror(errno));
strbuf_release(&sb);
delete_tempfile(&refs->tempfile);
return -1;
}
return 0;
write_error:
strbuf_addf(err, "error writing to %s: %s",
get_tempfile_path(refs->tempfile), strerror(errno));
error:
if (iter)
ref_iterator_abort(iter);
delete_tempfile(&refs->tempfile);
return -1;
}
static GtkWidget *
about_folders_page_new(void)
{
GtkWidget *table;
const char *constpath;
char *path;
const gchar *titles[] = { "Name", "Folder", "Typical Files"};
GtkWidget *scrolledwindow;
#if defined (HAVE_LIBSMI) || defined (HAVE_GEOIP)
gint i;
gchar **resultArray;
#endif
scrolledwindow = scrolled_window_new(NULL, NULL);
gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(scrolledwindow),
GTK_SHADOW_IN);
/* Container for our data */
table = simple_list_new(3, titles);
/* connect a callback so we can spot a double-click */
g_signal_connect(table, "button_press_event",
G_CALLBACK(about_folders_callback), NULL);
simple_list_url_col(table, 1);
/* "file open" */
about_folders_row(table, "\"File\" dialogs", get_last_open_dir(),
"capture files");
/* temp */
path = get_tempfile_path("");
about_folders_row(table, "Temp", path,
"untitled capture files");
g_free(path);
/* pers conf */
path = get_persconffile_path("", FALSE, FALSE);
about_folders_row(table, "Personal configuration", path,
"\"dfilters\", \"preferences\", \"ethers\", ...");
g_free(path);
/* global conf */
constpath = get_datafile_dir();
if (constpath != NULL) {
about_folders_row(table, "Global configuration", constpath,
"\"dfilters\", \"preferences\", \"manuf\", ...");
}
/* system */
constpath = get_systemfile_dir();
about_folders_row(table, "System", constpath,
"\"ethers\", \"ipxnets\"");
/* program */
constpath = get_progfile_dir();
about_folders_row(table, "Program", constpath,
"program files");
#if defined(HAVE_PLUGINS) || defined(HAVE_LUA_5_1)
/* pers plugins */
path = get_plugins_pers_dir();
about_folders_row(table, "Personal Plugins", path,
"dissector plugins");
g_free(path);
/* global plugins */
about_folders_row(table, "Global Plugins", get_plugin_dir(),
"dissector plugins");
#endif
#ifdef HAVE_PYTHON
/* global python bindings */
about_folders_row(table, "Python Bindings", get_wspython_dir(),
"python bindings");
#endif
#ifdef HAVE_GEOIP
/* GeoIP */
path = geoip_db_get_paths();
resultArray = g_strsplit(path, G_SEARCHPATH_SEPARATOR_S, 10);
for(i = 0; resultArray[i]; i++)
about_folders_row(table, "GeoIP path", g_strstrip(resultArray[i]),
"GeoIP database search path");
g_strfreev(resultArray);
g_free(path);
#endif
#ifdef HAVE_LIBSMI
/* SMI MIBs/PIBs */
path = oid_get_default_mib_path();
resultArray = g_strsplit(path, G_SEARCHPATH_SEPARATOR_S, 10);
for(i = 0; resultArray[i]; i++)
about_folders_row(table, "MIB/PIB path", g_strstrip(resultArray[i]),
"SMI MIB/PIB search path");
g_strfreev(resultArray);
g_free(path);
#endif
gtk_container_add(GTK_CONTAINER(scrolledwindow), table);
return scrolledwindow;
}
