import newlib-2000-02-17 snapshot

1 files changed, 54 insertions, 0 deletions

diff --git a/newlib/libc/sys/sysvi386/exec.c b/newlib/libc/sys/sysvi386/exec.c
new file mode 100644
index 000000000..6587d50a7
--- /dev/null
+++ b/newlib/libc/sys/sysvi386/exec.c
@@ -0,0 +1,54 @@
+#include <sys/unistd.h>
+#include <errno.h>
+
+extern char **environ;
+
+int
+execv (const char *path, char * const *args) {
+	extern int execve (const char *, char * const *, char * const*);
+	return execve (path, args, environ);
+}
+
+int
+execl(const char *path, const char *arg1, ...) {
+	return execv (path, &arg1);
+}
+
+/*
+ * Copy string, until c or <nul> is encountered.
+ * NUL-terminate the destination string (s1).
+ */
+
+static char *
+strccpy (char *s1, char *s2, char c) {
+	char *dest = s1;
+	while (*s2 && *s2 != c) {
+		*s1++ = *s2++;
+	}
+	*s1 = 0;
+	return dest;
+}
+
+int
+execvp(const char *file, char * const *args) {
+	extern char *getenv (const char *);  
+	char *path = getenv ("PATH");
+	char buf[MAXNAMLEN];
+
+	if (file[0] == '/') {	/* absolute pathname -- easy out */
+		return execv (file, args);
+	}
+
+	buf[0] = 0;	/* lots of initialization here 8-) */
+	while (*path) {
+		strccpy (buf, path, ':');
+		strcat (buf, "/");
+		strcat (buf, file);
+		execv (buf, args);
+		if (errno != ENOENT)
+			return -1;
+		while (*path && *path != ':')
+			path++;
+	}
+	return -1;
+}