Subject: Re: [PATCH] Make locked paths absolute when current directory is changed

From: Johannes Sixt <[email-masked]>
Date: Fri, 18 Jul 2014 22:44:07 +0200

Am 18.07.2014 15:08, schrieb Nguyễn Thái Ngọc Duy:
> diff --git a/lockfile.c b/lockfile.c
> index 8fbcb6a..a70d107 100644
> --- a/lockfile.c
> +++ b/lockfile.c
> @@ -280,3 +280,19 @@ void rollback_lock_file(struct lock_file *lk)
>  	}
>  	lk->filename[0] = 0;
>  }
> +
> +void make_locked_paths_absolute(void)
> +{
> +	struct lock_file *lk;
> +	const char *abspath;
> +	for (lk = lock_file_list; lk != NULL; lk = lk->next) {
> +		if (!lk->filename[0] || lk->filename[0] == '/')

Please use is_absolute_path().

> +			continue;
> +		abspath = absolute_path(lk->filename);
> +		if (strlen(abspath) >= sizeof(lk->filename))
> +			warning("locked path %s is relative when current directory "
> +				"is changed", lk->filename);
> +		else
> +			strcpy(lk->filename, abspath);
> +	}
> +}

> --- a/run-command.c
> +++ b/run-command.c
> @@ -399,7 +399,7 @@ fail_pipe:
>  			close(cmd->out);
>  		}
>  
> -		if (cmd->dir && chdir(cmd->dir))
> +		if (cmd->dir && chdir_safe(cmd->dir))

This one shouldn't be necessary: It's in the child, and the child
process does not release the locks; see the check for the owner in
remove_lock_file.

>  			die_errno("exec '%s': cd to '%s' failed", cmd->argv[0],
>  			    cmd->dir);
>  		if (cmd->env) {

-- Hannes