Initial implementation of "startup" components.

These are components that are run at program startup. Starting
other components is delayed until all startup components terminate.
This is similar to SysV "bootwait" components.

Upon termination, startup components are removed from the configuration.
They are not renewed upon configuratuion reload.

* src/comp.c (comp_array_remove): Remove from the depmap as well.
(component_ref_decr): Use comp_array_remove for active components
and plain component_free for inactive ones.
(component_build_depmap): Use comp_array_remove.
(component_config_commit): Special handling for pies_comp_startup
components.
* src/pies.c (modetab): New component modes: "startup" and "shutdown".
(main): Run program_init_startup.
* src/pies.h (pies_comp_mode): New modes: pies_comp_startup and
pies_comp_shutdown.
(program_init_startup): New proto.
* src/progman.c (progman_waiting_p): Return 1 if a startup component
is still running.
(program_init_startup): New function.
(progman_cleanup): Handle pies_comp_startup termination.
* src/socket.c (switch_eids): Avoid unnecessary calls to setegid
and seteuid.

* tests/atlocal.in (auxdir): New variable.
* tests/mailer: Move to tests/aux/
* tests/respawn: Move to tests/aux/
* tests/retcode: Move to tests/aux/
* tests/aux/startup: New auxiliary program.
* tests/redirect.at: Start components from $auxdir.
* tests/respawn.at: Likewise.
* tests/ret-exec.at: Likewise.
* tests/ret-notify.at: Likewise.
* tests/startup.at: New file.
* tests/testsuite.at: Include startup.at
* tests/Makefile.am: Add new tests.

1 files changed, 23 insertions, 15 deletions

diff --git a/src/pies.h b/src/pies.h
index a7f6567..bdc406b 100644
--- a/src/pies.h
+++ b/src/pies.h
@@ -104,7 +104,7 @@ struct action
   enum return_action act;  /* Action to take when the component terminates */
   char *addr;              /* Addresses to notify about it. */
   char *message;           /* Notification mail. */
-  char *command;           /* Execute this command */    
+  char *command;           /* Execute this command */
 };
 
 
@@ -137,14 +137,21 @@ enum pies_comp_mode
        component via the UNIX domain socket. Corresponds to
        `start_action = pass' in MeTA1. */
     pies_comp_pass_fd,
-    
+
+    /* Components of this type runs once on program startup. Running other
+       components is delayed until the last startup component finishes. */
+    pies_comp_startup,
+
+    /* FIXME: Runs before program termination */
+    pies_comp_shutdown,
+
     /*
     ** Init-style components
     */
     pies_mark_sysvinit,
     /* Start the process when the specified runlevel is entered and wait
        for its termination */
-    pies_comp_wait = pies_mark_sysvinit,                
+    pies_comp_wait = pies_mark_sysvinit,
     /* Execute the component once, when the specified runlevel is entered */
     pies_comp_once,
     /* Execute the component during system boot. Ignore runlevel settings. */
@@ -162,7 +169,7 @@ enum pies_comp_mode
     pies_comp_powerokwait,
     /* Execute the process when SIGINT is delivered, i.e. someone has
        pressed the Ctrl+Alt+Del combination. */
-    pies_comp_ctrlaltdel,       
+    pies_comp_ctrlaltdel,
     /* Execute the component when a specified ondemand runlevel is called */
     pies_comp_ondemand,
     /* Execute the component on the system boot. */
@@ -184,16 +191,16 @@ enum pies_comp_mode
 
 #define CF_DISABLED    0x001 /* The componenet is disabled */
 #define CF_PRECIOUS    0x002 /* The component is precious (should not
-                                be disabled) */
+                                be disabled) */
 #define CF_WAIT        0x004 /* Wait for the component instance to
-                                terminate. */
+                                terminate. */
 #define CF_TCPMUX      0x008 /* A plain TCPMUX service */
 #define CF_TCPMUXPLUS  0x010 /* A TCPMUX-plus service, i.e. pies
-                                must emit a '+' response before starting
-                                it */
+                                must emit a '+' response before starting
+                                it */
 #define CF_INTERNAL    0x020 /* An internal inetd service */
 #define CF_SOCKENV     0x040 /* Component wants socket information in
-                                the environment */
+                                the environment */
 #define CF_RESOLVE     0x080 /* Resolve IP addresses */
 #define CF_SIGGROUP    0x100 /* Send signals to the process group */
 
@@ -210,9 +217,9 @@ struct component
   struct component *prev, *next; /* Components form doubly-linked list. */
   int listidx;                   /* Index of the list. */
   size_t arridx;                 /* Index of this component. */
-  size_t ref_count;              /* Reference count. */ 
+  size_t ref_count;              /* Reference count. */
   struct prog *prog;             /* Prog associated with this component. */
-  
+
   enum pies_comp_mode mode;
   char *tag;               /* Entry tag (for diagnostics purposes) */
   char *program;           /* Program name */
@@ -232,7 +239,7 @@ struct component
 
   /* For exec (init) components */
   char *runlevels;
-  
+
   /* For inetd components */
   size_t max_rate;         /* Maximum number of invocations per minute */
   size_t max_ip_connections; /* Max. number of connections per IP address */
@@ -253,9 +260,9 @@ struct component
   char *access_denied_message;
   char *max_instances_message;
   char *max_ip_connections_message;
-  
+
   /* Redirectors: */
-  int facility;          /* Syslog facility. */
+  int facility;          /* Syslog facility. */
   struct redirector redir[2];   /* Repeaters for stdout and stderr */
   /* Actions to execute on various exit codes: */
   struct grecs_list *act_list;
@@ -334,6 +341,7 @@ int pies_read_config (void);
 int pies_reread_config (void);
 
 void register_prog (struct component *comp);
+void program_init_startup (void);
 int progman_waiting_p (void);
 void progman_start (void);
 void progman_gc (void);
@@ -594,7 +602,7 @@ struct sysvinit_request
 #define SYSV_ACCT_BOOT 0
 #define SYSV_ACCT_RUNLEVEL 1
 #define SYSV_ACCT_PROC_START 2
-#define SYSV_ACCT_PROC_STOP 3   
+#define SYSV_ACCT_PROC_STOP 3
 
 void sysvinit_acct (int what, const char *user, const char *id, pid_t pid,
                     const char *line);