ui/ncurses: Add help to system configuration screen

[petitboot] / lib / process / process.c

diff --git a/lib/process/process.c b/lib/process/process.c
index e1a158b0799519e391aa310228a3c8670cad7e47..86c7fbbf246c374d50f1c23a637118079817a27c 100644 (file)
--- a/lib/process/process.c
+++ b/lib/process/process.c
@@ -29,6 +29,7 @@ struct procset {
        struct list             async_list;
        int                     sigchld_pipe[2];
        struct waiter           *sigchld_waiter;
+       bool                    dry_run;
 };
 
 /* Internal data type for process handling
@@ -124,7 +125,10 @@ static void process_setup_stdout_child(struct process_info *procinfo)
        else
                dup2(log, STDOUT_FILENO);
 
-       dup2(log, STDERR_FILENO);
+       if (procinfo->process.keep_stdout && procinfo->process.add_stderr)
+               dup2(procinfo->stdout_pipe[1], STDERR_FILENO);
+       else
+               dup2(log, STDERR_FILENO);
 }
 
 static void process_finish_stdout(struct process_info *procinfo)
@@ -245,13 +249,14 @@ static int process_fini(void *p)
        return 0;
 }
 
-struct procset *process_init(void *ctx, struct waitset *set)
+struct procset *process_init(void *ctx, struct waitset *set, bool dry_run)
 {
        struct sigaction sa;
        int rc;
 
        procset = talloc(ctx, struct procset);
        procset->waitset = set;
+       procset->dry_run = dry_run;
        list_init(&procset->async_list);
 
        rc = pipe(procset->sigchld_pipe);
@@ -330,6 +335,8 @@ static int process_run_common(struct process_info *procinfo)
 
        if (pid == 0) {
                process_setup_stdout_child(procinfo);
+               if (procset->dry_run)
+                       exit(EXIT_SUCCESS);
                execvp(process->path, (char * const *)process->argv);
                exit(EXIT_FAILURE);
        }
@@ -351,8 +358,13 @@ int process_run_sync(struct process *process)
 
        process_read_stdout(procinfo);
 
-       rc = waitpid(process->pid, &process->exit_status, 0);
-       if (rc == -1) {
+       for (;;) {
+               rc = waitpid(process->pid, &process->exit_status, 0);
+               if (rc >= 0)
+                       break;
+               if (errno == EINTR)
+                       continue;
+
                pb_log("%s: waitpid failed: %s\n", __func__, strerror(errno));
                return rc;
        }
@@ -435,3 +447,9 @@ int process_run_simple(void *ctx, const char *name, ...)
 
        return rc;
 }
+
+bool process_exit_ok(struct process *process)
+{
+       return WIFEXITED(process->exit_status) &&
+               WEXITSTATUS(process->exit_status) == 0;
+}