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Make “debuglog on” command persist via restarts 

1. Reference: issue #1929
2. When restarting, add the argument "-d all" if debuglog is on.
3. Add add_argument() for adding/replacing the given argument.
This commit is contained in:
hwangcc23 2015-09-17 23:53:12 +08:00
parent d4fb17546c
commit b2bbd2c064
1 changed files with 35 additions and 42 deletions
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77
src/util.c
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@ -169,24 +169,35 @@ bool path_exists(const char *path) {
}
/*
* Goes through the list of arguments (for exec()) and checks if the given argument
* is present. If not, it copies the arguments (because we cannot realloc it) and
* appends the given argument.
*
* Goes through the list of arguments (for exec()) and add/replace the given option,
* including the option name, its argument, and the option character.
*/
static char **append_argument(char **original, char *argument) {
static char **add_argument(char **original, char *opt_char, char *opt_arg, char *opt_name) {
int num_args;
for (num_args = 0; original[num_args] != NULL; num_args++) {
DLOG("original argument: \"%s\"\n", original[num_args]);
/* If the argument is already present we return the original pointer */
if (strcmp(original[num_args], argument) == 0)
return original;
for (num_args = 0; original[num_args] != NULL; num_args++)
;
char **result = scalloc(num_args + 3, sizeof(char *));
/* copy the arguments, but skip the ones we'll replace */
int write_index = 0;
bool skip_next = false;
for (int i = 0; i < num_args; ++i) {
if (skip_next) {
skip_next = false;
continue;
}
if (!strcmp(original[i], opt_char) ||
(opt_name && !strcmp(original[i], opt_name))) {
if (opt_arg)
skip_next = true;
continue;
}
result[write_index++] = original[i];
}
/* Copy the original array */
char **result = smalloc((num_args + 2) * sizeof(char *));
memcpy(result, original, num_args * sizeof(char *));
result[num_args] = argument;
result[num_args + 1] = NULL;
/* add the arguments we'll replace */
result[write_index++] = opt_char;
result[write_index] = opt_arg;
return result;
}
@ -267,39 +278,21 @@ void i3_restart(bool forget_layout) {
ipc_shutdown();
LOG("restarting \"%s\"...\n", start_argv[0]);
/* make sure -a is in the argument list or append it */
start_argv = append_argument(start_argv, "-a");
/* make sure -a is in the argument list or add it */
start_argv = add_argument(start_argv, "-a", NULL, NULL);
/* make debuglog-on persist */
if (get_debug_logging()) {
start_argv = add_argument(start_argv, "-d", "all", NULL);
}
/* replace -r <file> so that the layout is restored */
if (restart_filename != NULL) {
/* create the new argv */
int num_args;
for (num_args = 0; start_argv[num_args] != NULL; num_args++)
;
char **new_argv = scalloc(num_args + 3, sizeof(char *));
/* copy the arguments, but skip the ones we'll replace */
int write_index = 0;
bool skip_next = false;
for (int i = 0; i < num_args; ++i) {
if (skip_next)
skip_next = false;
else if (!strcmp(start_argv[i], "-r") ||
!strcmp(start_argv[i], "--restart"))
skip_next = true;
else
new_argv[write_index++] = start_argv[i];
}
/* add the arguments we'll replace */
new_argv[write_index++] = "--restart";
new_argv[write_index] = restart_filename;
/* swap the argvs */
start_argv = new_argv;
start_argv = add_argument(start_argv, "--restart", restart_filename, "-r");
}
execvp(start_argv[0], start_argv);
/* not reached */
}