Added patch from Didier Gaudin which allows init to load configuration

data from files stored in /etc/inittab.d/

doc/Changelog

@@ -10,6 +10,10 @@ sysvinit (2.97) unreleased; urgency=low
     * Added shell script from Trek which converts systemd unit files
       into init.d style scripts.
 
+    * Added patch from Didier Gaudin which allows init to load configuration
+      data from files stored in /etc/inittab.d/
+
+
 sysvinit (2.96) released; urgency=low
 
   [ Jesse Smith ]

src/Makefile

@@ -203,6 +203,7 @@ install:	all
 			$(INSTALL_EXEC) $$i $(ROOT)/usr/bin/ ; \
 		done
 		# $(INSTALL_DIR) $(ROOT)/etc/
+		$(INSTALL_DIR) $(ROOT)/etc/inittab.d
 		# $(INSTALL_EXEC) ../doc/initscript.sample $(ROOT)/etc/
 		ln -sf halt $(ROOT)/sbin/reboot
 		ln -sf halt $(ROOT)/sbin/poweroff

src/init.c

@@ -63,6 +63,11 @@ Version information is not placed in the top-level Makefile by default
 #include <sys/ttydefaults.h>
 #include <sys/syslog.h>
 #include <sys/time.h>
+/*
+ * inittab.d
+ */
+#include <sys/types.h>
+#include <dirent.h>
 
 #ifdef WITH_SELINUX
 #  include <selinux/selinux.h>
@@ -1431,6 +1436,7 @@ static
 void read_inittab(void)
 {
   FILE		*fp;			/* The INITTAB file */
+  FILE		*fp_tab;		/* The INITTABD files */
   CHILD		*ch, *old, *i;		/* Pointers to CHILD structure */
   CHILD		*head = NULL;		/* Head of linked list */
 #ifdef INITLVL
@@ -1448,7 +1454,10 @@ void read_inittab(void)
   int		round;			/* round 0 for SIGTERM, 1 for SIGKILL */
   int		foundOne = 0;		/* No killing no sleep */
   int		talk;			/* Talk to the user */
-  int		done = 0;		/* Ready yet? */
+  int		done = -1;		/* Ready yet? , 2 level : -1 nothing done, 0 inittab done, 1 inittab and inittab.d done */
+  DIR 		*tabdir=NULL;		/* the INITTAB.D dir */
+  struct dirent *file_entry;		/* inittab.d entry */
+  char 		f_name[272];		/* size d_name + strlen /etc/inittad.d/ */
 
 #if DEBUG
   if (newFamily != NULL) {
@@ -1464,12 +1473,19 @@ void read_inittab(void)
   if ((fp = fopen(INITTAB, "r")) == NULL)
 	initlog(L_VB, "No inittab file found");
 
-  while(!done) {
+  /*
+   *  Open INITTAB.D directory 
+   */
+  if( (tabdir = opendir(INITTABD))==NULL)
+	  initlog(L_VB, "No inittab.d directory found");
+
+  while(done!=1) {
 	/*
 	 *	Add single user shell entry at the end.
 	 */
+	if(done == -1) {
 		if (fp == NULL || fgets(buf, sizeof(buf), fp) == NULL) {
-		done = 1;
+			done = 0;
 			/*
 			 *	See if we have a single user entry.
 			 */
@@ -1480,6 +1496,50 @@ void read_inittab(void)
 			else
 				continue;
 		}
+	} /* end if( done==-1) */
+	else if ( done == 0 ){
+		/* parse /etc/inittab.d and read all .tab files */
+		if(tabdir!=NULL){
+			if( (file_entry = readdir(tabdir))!=NULL){
+				/* ignore files not like *.tab */
+				if (!strcmp(file_entry->d_name, ".") || !strcmp(file_entry->d_name, ".."))
+					continue;
+				if (strlen(file_entry->d_name) < 5 || strcmp(file_entry->d_name + strlen(file_entry->d_name) - 4, ".tab"))
+					continue;
+				/*
+				 * initialize filename
+				 */
+				memset(f_name,0,sizeof(char)*272);
+				snprintf(f_name,272,"/etc/inittab.d/%s",file_entry->d_name);
+				initlog(L_VB, "Reading: %s",f_name);
+				/*
+				 * read file in inittab.d only one entry per file
+				 */
+				if ((fp_tab = fopen(f_name, "r")) == NULL)
+					continue;
+				/* read the file while the line contain comment */
+				while( fgets(buf, sizeof(buf), fp_tab) != NULL) {
+					for(p = buf; *p == ' ' || *p == '\t'; p++);
+					if (*p != '#' && *p != '\n')
+						break;
+				}
+				fclose(fp_tab);
+				/* do some checks */
+				if( buf == NULL ) 
+					continue;
+				if( strlen( p  ) == 0 )
+					continue;
+			} /* end of readdir, all is done */
+			else { 
+				done = 1;
+				continue;
+			}
+		} /* end of if(tabdir!=NULL) */
+		else {
+			done = 1;
+			continue;
+		}
+	} /* end of if ( done == 0 ) */
 	lineNo++;
 	/*
 	 *	Skip comments and empty lines
@@ -1630,10 +1690,12 @@ void read_inittab(void)
 			break;
 		}
   }
+
   /*
    *	We're done.
    */
   if (fp) fclose(fp);
+  if(tabdir) closedir(tabdir);
 
 #ifdef __linux__
   check_kernel_console();

src/paths.h

@@ -27,6 +27,7 @@
 #define SECURETTY	"/etc/securetty"	/* List of root terminals */
 #define SDALLOW		"/etc/shutdown.allow"	/* Users allowed to shutdown */
 #define INITTAB		"/etc/inittab"		/* Location of inittab */
+#define INITTABD	"/etc/inittab.d"	/* Location of inittab.d directory */
 #define INIT		"/sbin/init"		/* Location of init itself. */
 #define NOLOGIN		"/etc/nologin"		/* Stop user logging in. */
 #define FASTBOOT	"/fastboot"		/* Enable fast boot. */