1 files changed, 88 insertions, 0 deletions
diff --git a/vms/vms_cli.c b/vms/vms_cli.c
new file mode 100644
index 00000000..e4e33404
--- /dev/null
+++ b/vms/vms_cli.c
@@ -0,0 +1,88 @@
+/*
+ * 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"
+
+extern 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_long
+Cli_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_long
+Cli_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_long
+Cli_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;
+}