MINOR: debug: store runtime uid/gid in postmortem

Let's extend post_mortem to store runtime process uid and gid.
This information is fed in feed_post_mortem_late(), just before calling
run_poll_loop(). Like this we are sure that all configuration settings were
successfully applied.

diff --git a/src/debug.c b/src/debug.c
index 268a2d3173b318ffd46875d8b525bfffc26ea67b..d110a12ec558d3f67809697a3c841f2ec2debcf6 100644 (file)
--- a/src/debug.c
+++ b/src/debug.c
@@ -116,6 +116,8 @@ struct post_mortem {
                pid_t pid;
                uid_t boot_uid;
                gid_t boot_gid;
+               uid_t run_uid;
+               gid_t run_gid;
 #if defined(USE_LINUX_CAP)
                struct {
                        // initial process capabilities
@@ -565,10 +567,11 @@ static int debug_parse_cli_show_dev(char **args, char *payload, struct appctx *a
        for (i = 0; i < post_mortem.process.argc; i++)
                chunk_appendf(&trash, "%s ", post_mortem.process.argv[i]);
        chunk_appendf(&trash, "\n");
+
        chunk_appendf(&trash, "  boot uid: %d\n", post_mortem.process.boot_uid);
-       chunk_appendf(&trash, "  runtime uid: %d\n", geteuid());
+       chunk_appendf(&trash, "  runtime uid: %d\n", post_mortem.process.run_uid);
        chunk_appendf(&trash, "  boot gid: %d\n", post_mortem.process.boot_gid);
-       chunk_appendf(&trash, "  runtime gid: %d\n", getegid());
+       chunk_appendf(&trash, "  runtime gid: %d\n", post_mortem.process.run_gid);
 
 #if defined(USE_LINUX_CAP)
        /* let's dump saved in feed_post_mortem() initial capabilities sets */
@@ -2429,6 +2432,12 @@ static int feed_post_mortem_late()
                post_mortem.process.thread_info[i].stack_top = ha_thread_info[i].stack_top;
        }
 
+       /* also set runtime process settings. At this stage we are sure, that all
+        * config options and limits adjustements are successfully applied.
+        */
+       post_mortem.process.run_uid = geteuid();
+       post_mortem.process.run_gid = getegid();
+
        return 1;
 }