1 files changed, 129 insertions, 0 deletions
diff --git a/usr/src/lib/libbc/libc/gen/common/execvp.c b/usr/src/lib/libbc/libc/gen/common/execvp.c
new file mode 100644
index 0000000000..67579cef07
--- /dev/null
+++ b/usr/src/lib/libbc/libc/gen/common/execvp.c
@@ -0,0 +1,129 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 1992 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*      Copyright (c) 1984 AT&T */
+/*        All Rights Reserved   */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"  /* from S5R2 1.2 */
+
+/*LINTLIBRARY*/
+/*
+ *	execlp(name, arg,...,0)	(like execl, but does path search)
+ *	execvp(name, argv)	(like execv, but does path search)
+ */
+#include <sys/errno.h>
+#include <sys/param.h>
+#include <varargs.h>
+#define	NULL	0
+
+static char *execat();
+static char *shell = "/bin/sh";
+extern char *getenv(), *strchr();
+extern unsigned sleep();
+extern int errno, execv();
+
+/*VARARGS1*/
+int
+execlp(name, va_alist)
+	char	*name;
+	va_dcl
+{
+	va_list args;
+
+	va_start(args);
+	return(execvp(name, (char **)args));
+}
+
+int
+execvp(name, argv)
+char	*name, **argv;
+{
+	char	*pathstr;
+	char	fname[MAXPATHLEN];
+	char	*newargs[256];
+	int	i;
+	register char	*cp;
+	register unsigned etxtbsy=1;
+	register int eacces=0;
+
+	if((pathstr = getenv("PATH")) == NULL)
+		pathstr = ":/usr/ucb:/bin:/usr/bin";
+	cp = strchr(name, '/')? "": pathstr;
+
+	do {
+		cp = execat(cp, name, fname);
+	retry:
+		(void) execv(fname, argv);
+		switch(errno) {
+		case ENOEXEC:
+			newargs[0] = "sh";
+			newargs[1] = fname;
+			for(i=1; newargs[i+1]=argv[i]; ++i) {
+				if(i >= 254) {
+					errno = E2BIG;
+					return(-1);
+				}
+			}
+			(void) execv(shell, newargs);
+			return(-1);
+		case ETXTBSY:
+			if(++etxtbsy > 5)
+				return(-1);
+			(void) sleep(etxtbsy);
+			goto retry;
+		case EACCES:
+			++eacces;
+			break;
+		case ENOMEM:
+		case E2BIG:
+		case EFAULT:
+			return(-1);
+		}
+	} while(cp);
+	if(eacces)
+		errno = EACCES;
+	return(-1);
+}
+
+static char *
+execat(s1, s2, si)
+register char *s1, *s2;
+char	*si;
+{
+	register char	*s;
+	char	*end;
+
+	s = si;
+	end = s + MAXPATHLEN;
+	while(*s1 && *s1 != ':' && s < end)
+		*s++ = *s1++;
+	if(si != s && s < end)
+		*s++ = '/';
+	while(*s2 && s < end)
+		*s++ = *s2++;
+	*s = '\0';
+	return(*s1? ++s1: 0);
+}