MINOR: cfgparse-global: move 'pidfile' in global keywords list

This commit cleans up cfg_parse_global() and prepares the config parser to
support MODE_DISCOVERY. This step is needed in early starting stage, just to
figura out in which mode the process was started, to set some necessary
parameteres needed for this mode and to continue the initialization
stage.

'pidfile' makes part of such common keywords, which are needed to be parsed
very early and which are used almost in all process modes (except the
foreground, '-d').

'pidfile' keyword parser is called by section parser and follows the common
API, i.e. it returns -1 on failure, 0 on success and 1 on recoverable error. In
case of recoverable error we've previously returned ERR_ALERT (0x10) and we have
emitted an alert message at startup. Section parser treats all rc > 0 as
ERR_WARN. So in case, if pidfile was already specified via command line, the
keyword parser will return 1 (in order to respect the common API), section
parser will treat this as ERR_WARN and a warning message will be emitted during
process startup instead of alert, as it was before.

diff --git a/src/cfgparse-global.c b/src/cfgparse-global.c
index 0e4a7e914ec4aa875ea719413fed0a0881547319..fc9507dd561d25c61d0469926219ec8893a41bd2 100644 (file)
--- a/src/cfgparse-global.c
+++ b/src/cfgparse-global.c
@@ -44,7 +44,7 @@ static const char *common_kw_list[] = {
        "external-check", "user", "group", "nbproc", "maxconn",
        "ssl-server-verify", "maxconnrate", "maxsessrate", "maxsslrate",
        "maxcomprate", "maxpipes", "maxzlibmem", "maxcompcpuusage", "ulimit-n",
-       "chroot", "description", "node", "pidfile", "unix-bind", "log",
+       "chroot", "description", "node", "unix-bind", "log",
        "log-send-hostname", "server-state-base", "server-state-file",
        "log-tag", "spread-checks", "max-spread-checks", "cpu-map", "setenv",
        "presetenv", "unsetenv", "resetenv", "strict-limits", "localpeer",
@@ -802,21 +802,6 @@ int cfg_parse_global(const char *file, int linenum, char **args, int kwm)
 
                global.node = strdup(args[1]);
        }
-       else if (strcmp(args[0], "pidfile") == 0) {
-               if (alertif_too_many_args(1, file, linenum, args, &err_code))
-                       goto out;
-               if (global.pidfile != NULL) {
-                       ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
-                       err_code |= ERR_ALERT;
-                       goto out;
-               }
-               if (*(args[1]) == 0) {
-                       ha_alert("parsing [%s:%d] : '%s' expects a file name as an argument.\n", file, linenum, args[0]);
-                       err_code |= ERR_ALERT | ERR_FATAL;
-                       goto out;
-               }
-               global.pidfile = strdup(args[1]);
-       }
        else if (strcmp(args[0], "unix-bind") == 0) {
                int cur_arg = 1;
                while (*(args[cur_arg])) {
@@ -1449,6 +1434,31 @@ static int cfg_parse_global_disable_poller(char **args, int section_type,
        return 0;
 }
 
+static int cfg_parse_global_pidfile(char **args, int section_type,
+                                   struct proxy *curpx, const struct proxy *defpx,
+                                   const char *file, int line, char **err)
+{
+       if (too_many_args(1, args, err, NULL))
+               return -1;
+
+       if (strcmp(args[0], "pidfile") == 0) {
+               if (global.pidfile != NULL) {
+                       memprintf(err, "'%s' already specified. Continuing.", args[0]);
+                       return 1;
+               }
+               if (*(args[1]) == 0) {
+                       memprintf(err, "'%s' expects a file name as an argument.", args[0]);
+                       return -1;
+               }
+               global.pidfile = strdup(args[1]);
+       } else {
+               BUG_ON(1, "Triggered in cfg_parse_global_pidfile() by unsupported keyword.\n");
+               return -1;
+       }
+
+       return 0;
+}
+
 static struct cfg_kw_list cfg_kws = {ILH, {
        { CFG_GLOBAL, "prealloc-fd", cfg_parse_prealloc_fd },
        { CFG_GLOBAL, "harden.reject-privileged-ports.tcp",  cfg_parse_reject_privileged_ports },
@@ -1461,6 +1471,7 @@ static struct cfg_kw_list cfg_kws = {ILH, {
        { CFG_GLOBAL, "nokqueue", cfg_parse_global_disable_poller },
        { CFG_GLOBAL, "noevports", cfg_parse_global_disable_poller },
        { CFG_GLOBAL, "nopoll", cfg_parse_global_disable_poller },
+       { CFG_GLOBAL, "pidfile", cfg_parse_global_pidfile },
        { 0, NULL, NULL },
 }};