Initial commit

1 files changed, 91 insertions, 0 deletions

diff --git a/unix/os/zgcmdl.c b/unix/os/zgcmdl.c
new file mode 100644
index 00000000..2624ec73
--- /dev/null
+++ b/unix/os/zgcmdl.c
@@ -0,0 +1,91 @@
+#include <stdio.h>
+#define	import_kernel
+#define	import_knames
+#define import_spp
+#include <iraf.h>
+
+extern	char *environ[];
+#ifdef	MACOSX
+extern  char ***_NSGetArgv();
+extern  int *_NSGetArgc();
+#endif
+
+#ifdef LINUXPPC
+#define xargc	f__xargc
+#define xargv	f__xargv
+#endif
+
+#ifdef LINUX
+extern	char **xargv;		/* defined in getarg(3f); requires libU77! */
+extern	int xargc;
+#else
+static	char **xargv = NULL;
+static	int xargc = 0;
+#endif
+
+/* ZGCMDL -- Get the host system command line used to invoke this process.
+ * There does not seem to be any straightforward way to do this for UNIX,
+ * but the argc,argv info is evidently pushed on the stack immediately before
+ * the environment list, so we can locate the ARGV array by searching back
+ * up the stack a bit.  This is very host OS dependent.
+ */
+int
+ZGCMDL (
+  PKCHAR  *cmd,				/* receives the command line	*/
+  XINT	  *maxch,			/* maxch chars out		*/
+  XINT	  *status
+)
+{
+	register char *ip, *op;
+	register int   n;
+	char	**argv;
+
+#ifdef	MACOSX
+	argv = *_NSGetArgv();
+	xargc = *_NSGetArgc();
+	xargv = argv;
+
+#else
+	unsigned int  *ep;
+	register int  narg;
+
+
+	if (!(argv = xargv)) {
+	    /* Locate the ARGV array.  This assumes that argc,argv are
+	     * stored in memory immediately preceeding the environment
+	     * list, i.e.,
+	     *
+	     *	argc
+	     *	argv[0]
+	     *	argv[1]
+	     *	  ...
+	     *	argv[argc-1]
+	     *	NULL
+	     *      env[0]			<- environ
+	     *      env[1]
+	     *	  ...
+	     *
+	     * !! NOTE !! - This is very system dependent!
+	     */
+	    ep = ((unsigned int *) *environ) - 1;
+	    for (narg=0;  *(ep-1) != (unsigned int)narg;  narg++)
+		--ep;
+	    xargc = narg;
+	    argv = (char **)ep;
+	}
+#endif
+
+	/* Reconstruct the argument list.
+	 */
+	for (op=(char *)cmd, n = *maxch, argv++;  n >= 0 && *argv;  argv++) {
+	    if (op > (char *)cmd && --n >= 0)
+		*op++ = ' ';
+	    for (ip = *argv;  --n >= 0 && (*op = *ip++);  op++)
+		;
+	}
+
+	*op = EOS;
+	*status = op - (char *)cmd;
+
+	return (XOK);
+}