respect CFLAGS/CPPFLAGS in env

[oweals/busybox.git] / console-tools / deallocvt.c

diff --git a/console-tools/deallocvt.c b/console-tools/deallocvt.c
index ae4dbb5a8cc93f4d288f9f983cf0b78d6fa88b28..cd581b1c835f457685a7ced0060ed591668c0250 100644 (file)
--- a/console-tools/deallocvt.c
+++ b/console-tools/deallocvt.c
@@ -1,48 +1,37 @@
+/* vi: set sw=4 ts=4: */
 /*
- * disalloc.c - aeb - 940501 - Disallocate virtual terminal(s)
- * Renamed deallocvt.
+ * Disallocate virtual terminal(s)
+ *
+ * Copyright (C) 2003 by Tito Ragusa <farmatito@tiscali.it>
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
-#include "internal.h"
-#include <stdlib.h>
-#include <fcntl.h>
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <linux/vt.h>
-#include <stdio.h>
 
-extern int getfd(void);
-char *progname;
+/* no options, no getopt */
 
-int
-deallocvt_main(int argc, char *argv[]) {
-    int fd, num, i;
+#include "busybox.h"
 
-    if (argc < 1)              /* unlikely */
-      exit(1);
-    progname = argv[0];
+/* From <linux/vt.h> */
+enum { VT_DISALLOCATE = 0x5608 }; /* free memory associated to vt */
 
-    fd = get_console_fd("/dev/console");
+int deallocvt_main(int argc, char *argv[])
+{
+       /* num = 0 deallocate all unused consoles */
+       int num = 0;
 
-    if (argc == 1) {
-       /* deallocate all unused consoles */
-       if (ioctl(fd,VT_DISALLOCATE,0)) {
-           perror("VT_DISALLOCATE");
-           exit(1);
+       switch (argc) {
+       case 2:
+               num = xatoul_range(argv[1], 1, 63);
+               /* Fallthrough */
+       case 1:
+               break;
+       default:
+               bb_show_usage();
        }
-    } else
-    for (i = 1; i < argc; i++) {
-       num = atoi(argv[i]);
-       if (num == 0)
-           fprintf(stderr, "%s: 0: illegal VT number\n", progname);
-       else if (num == 1)
-           fprintf(stderr, "%s: VT 1 cannot be deallocated\n", progname);
-       else
-       if (ioctl(fd,VT_DISALLOCATE,num)) {
-           perror("VT_DISALLOCATE");
-           fprintf(stderr, "%s: could not deallocate console %d\n",
-                   progname, num);
-           exit(1);
+
+       if (-1 == ioctl(get_console_fd(), VT_DISALLOCATE, num)) {
+               bb_perror_msg_and_die("VT_DISALLOCATE");
        }
-    }
-    exit(0);
+       return EXIT_SUCCESS;
 }