verify_absent: allow filenames longer than PATH_MAX

diff --git a/run-command.c b/run-command.c
index 761f0fde40c91a3cc910c092c5aa9ad56f2f0042..a47699966c59f708683e439bcd3296d5fce8acf5 100644 (file)
--- a/run-command.c
+++ b/run-command.c
@@ -12,6 +12,7 @@ void child_process_init(struct child_process *child)
 {
        memset(child, 0, sizeof(*child));
        argv_array_init(&child->args);
+       argv_array_init(&child->env_array);
 }
 
 struct child_to_clean {
@@ -287,6 +288,8 @@ int start_command(struct child_process *cmd)
 
        if (!cmd->argv)
                cmd->argv = cmd->args.argv;
+       if (!cmd->env)
+               cmd->env = cmd->env_array.argv;
 
        /*
         * In case of errors we must keep the promise to close FDs
@@ -338,6 +341,7 @@ int start_command(struct child_process *cmd)
                        error("cannot create %s pipe for %s: %s",
                                str, cmd->argv[0], strerror(failed_errno));
                        argv_array_clear(&cmd->args);
+                       argv_array_clear(&cmd->env_array);
                        errno = failed_errno;
                        return -1;
                }
@@ -524,6 +528,7 @@ int start_command(struct child_process *cmd)
                else if (cmd->err)
                        close(cmd->err);
                argv_array_clear(&cmd->args);
+               argv_array_clear(&cmd->env_array);
                errno = failed_errno;
                return -1;
        }
@@ -550,6 +555,7 @@ int finish_command(struct child_process *cmd)
 {
        int ret = wait_or_whine(cmd->pid, cmd->argv[0]);
        argv_array_clear(&cmd->args);
+       argv_array_clear(&cmd->env_array);
        return ret;
 }
 
@@ -620,6 +626,45 @@ static int async_die_is_recursing(void)
        return ret != NULL;
 }
 
+#else
+
+static struct {
+       void (**handlers)(void);
+       size_t nr;
+       size_t alloc;
+} git_atexit_hdlrs;
+
+static int git_atexit_installed;
+
+static void git_atexit_dispatch(void)
+{
+       size_t i;
+
+       for (i=git_atexit_hdlrs.nr ; i ; i--)
+               git_atexit_hdlrs.handlers[i-1]();
+}
+
+static void git_atexit_clear(void)
+{
+       free(git_atexit_hdlrs.handlers);
+       memset(&git_atexit_hdlrs, 0, sizeof(git_atexit_hdlrs));
+       git_atexit_installed = 0;
+}
+
+#undef atexit
+int git_atexit(void (*handler)(void))
+{
+       ALLOC_GROW(git_atexit_hdlrs.handlers, git_atexit_hdlrs.nr + 1, git_atexit_hdlrs.alloc);
+       git_atexit_hdlrs.handlers[git_atexit_hdlrs.nr++] = handler;
+       if (!git_atexit_installed) {
+               if (atexit(&git_atexit_dispatch))
+                       return -1;
+               git_atexit_installed = 1;
+       }
+       return 0;
+}
+#define atexit git_atexit
+
 #endif
 
 int start_async(struct async *async)
@@ -678,6 +723,7 @@ int start_async(struct async *async)
                        close(fdin[1]);
                if (need_out)
                        close(fdout[0]);
+               git_atexit_clear();
                exit(!!async->proc(proc_in, proc_out, async->data));
        }