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CPM OPERATING SYSTEMS/CPM 68K/1.0X SOURCES/v101/clib/exec.c

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+/****************************************************************************/
+/*									    */
+/*			    E x e c   F u n c t i o n			    */
+/*			    -------------------------			    */
+/*	Copyright 1982 by Digital Research Inc.  All rights reserved.	    */
+/*									    */
+/*	The execl function is called from anywhere to pass control to  	    */
+/*	another program from the the executing C program.		    */
+/*	Note that the stream files are closed via '_cleanup()'.		    */
+/*									    */
+/*	Calling Sequence:						    */
+/*									    */
+/*		execl(name,arg0,arg1,...,argn,NULLPTR);			    */
+/*									    */
+/*	Where:								    */
+/*		name, arg0, arg1...argn are pointers to character strings   */
+/*									    */
+/****************************************************************************/
+#include <stdio.h>
+#include <cpm.h>
+#include <ctype.h>
+execl(name,arg0)				/***************************/
+	UBYTE *name,*arg0;			/* pointers arguments      */
+{						/*			   */
+	UBYTE **args;				/* used to index into args */
+	UBYTE cmdline[128];			/* CP/M command line area  */
+	WORD  i;				/***************************/
+						/*			   */
+	_cleanup();				/* Close all (stream) files*/
+	__BDOS(26,&cmdline[0]);			/* DMA -> Command line	   */
+						/* now build cmdline 	   */
+	strcpy(cmdline,name);			/* Copy name portion	   */
+	for(i=0; i < strlen(cmdline); i++)	/* uppercase command name  */
+	  if (islower(cmdline[i]))		/***************************/
+	    cmdline[i] = toupper(cmdline[i]);	/*			   */
+						/*			   */
+	args = &arg0;				/* Copy args		   */
+	args++;					/* arg0 is a dup of the    */
+						/*	      command name */
+	while(*args != NULL)			/***************************/
+	  {					/*			   */
+            strcat(cmdline," ");		/* Add a blank		   */
+	    strcat(cmdline,*args++);		/* Add next arg		   */
+	  }					/***************************/
+	cmdline[0] = strlen(&cmdline[1]);	/* Set commmand length	   */
+	__BDOS(47,0L);				/* chain to program        */
+}						/***************************/