/* * vms_cli.c - command line interface routines. *							Pat Rankin, Nov'89 *	Routines called from vms_gawk.c for DCL parsing. */#define  P(foo) ()#include "config.h"	/* in case we want to suppress 'const' &c */#include "vms.h"#ifndef _STRING_H#include <string.h>#endifextern u_long CLI$PRESENT(const Dsc *);extern u_long CLI$GET_VALUE(const Dsc *, Dsc *, short *);extern u_long CLI$DCL_PARSE(const Dsc *, const void *, ...);extern u_long SYS$CLI(void *, ...);extern u_long SYS$FILESCAN(const Dsc *, void *, long *);extern void  *LIB$ESTABLISH(u_long (*handler)(void *, void *));extern u_long LIB$SIG_TO_RET(void *, void *);	/* condition handler *//* Cli_Present() - call CLI$PRESENT to determine whether a parameter or     *//*		  qualifier is present on the [already parsed] command line */u_longCli_Present( const char *item ){    Dsc item_dsc;    (void)LIB$ESTABLISH(LIB$SIG_TO_RET);    item_dsc.len = strlen(item_dsc.adr = (char *)item);    return CLI$PRESENT(&item_dsc);}/* Cli_Get_Value() - call CLI$GET_VALUE to retreive the value of a *//*		    parameter or qualifier from the command line   */u_longCli_Get_Value( const char *item, char *result, int size ){    Dsc item_dsc, res_dsc;    u_long sts;    short len = 0;    (void)LIB$ESTABLISH(LIB$SIG_TO_RET);    item_dsc.len = strlen(item_dsc.adr = (char *)item);    res_dsc.len = size,  res_dsc.adr = result;    sts = CLI$GET_VALUE(&item_dsc, &res_dsc, &len);    result[len] = '\0';    return sts;}/* Cli_Parse_Command() - use the $CLI system service (undocumented) to	 *//*			retreive the actual command line (which might be *//*			"run prog" or "mcr prog [params]") and then call *//*			CLI$DCL_PARSE to parse it using specified tables */u_longCli_Parse_Command( const void *cmd_tables, const char *cmd_verb ){    struct { short len, code; void *adr; } fscn[2];    struct { char rqtype, rqindx, rqflags, rqstat; unsigned :32;	     Dsc rdesc; unsigned :32; unsigned :32; unsigned :32; } cmd;    u_long sts;    int    ltmp;    char   longbuf[2600];    (void)LIB$ESTABLISH(LIB$SIG_TO_RET);    memset(&cmd, 0, sizeof cmd);    cmd.rqtype = CLI$K_GETCMD;		/* command line minus the verb */    sts = SYS$CLI( &cmd, (void *)0, (void *)0); /* get actual command line */    if (vmswork(sts)) {		/* ok => cli available & verb wasn't "RUN" */	/* invoked via symbol => have command line (which might be empty) */	/*    [might also be invoked via mcr or dcl; that's ok]		  */	if (cmd.rqstat == CLI$K_VERB_MCR) {	    /* need to strip image name from MCR invocation   */	    memset(fscn, 0, sizeof fscn);	    fscn[0].code = FSCN$_FILESPEC;	/* full file specification */	    (void)SYS$FILESCAN( &cmd.rdesc, fscn, (long *)0);	    cmd.rdesc.len -= fscn[0].len;	/* shrink size */	    cmd.rdesc.adr += fscn[0].len;	/* advance ptr */	}	/* prepend verb and then parse the command line */	strcat(strcpy(longbuf, cmd_verb), " "),  ltmp = strlen(longbuf);	if (cmd.rdesc.len + ltmp > sizeof longbuf)	    cmd.rdesc.len = sizeof longbuf - ltmp;	strncpy(&longbuf[ltmp], cmd.rdesc.adr, cmd.rdesc.len);	cmd.rdesc.len += ltmp,	cmd.rdesc.adr = longbuf;	sts = CLI$DCL_PARSE( &cmd.rdesc, cmd_tables);    }    return sts;}