more: stop using bss

[oweals/busybox.git] / miscutils / eject.c

diff --git a/miscutils/eject.c b/miscutils/eject.c
index 3f1d6ab4475f63f6eaba714952abf324879e02f8..631a344a19f80a8472dcf46fbb5536114d6cdb30 100644 (file)
--- a/miscutils/eject.c
+++ b/miscutils/eject.c
@@ -1,22 +1,11 @@
+/* vi: set sw=4 ts=4: */
 /*
  * eject implementation for busybox
  *
  * Copyright (C) 2004  Peter Willis <psyphreak@phreaker.net>
+ * Copyright (C) 2005  Tito Ragusa <farmatito@tiscali.it>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
  */
 
 /*
@@ -24,36 +13,49 @@
  * Most of the dirty work blatantly ripped off from cat.c =)
  */
 
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <unistd.h>
-#include <sys/mount.h>
-#include <mntent.h> 
-#include "busybox.h"
+#include "libbb.h"
 
 /* various defines swiped from linux/cdrom.h */
 #define CDROMCLOSETRAY            0x5319  /* pendant of CDROMEJECT  */
 #define CDROMEJECT                0x5309  /* Ejects the cdrom media */
-#define DEFAULT_CDROM             "/dev/cdrom"
+#define CDROM_DRIVE_STATUS        0x5326  /* Get tray position, etc. */
+/* drive status possibilities returned by CDROM_DRIVE_STATUS ioctl */
+#define CDS_TRAY_OPEN        2
 
-extern int eject_main(int argc, char **argv)
+#define FLAG_CLOSE  1
+#define FLAG_SMART  2
+
+int eject_main(int argc, char **argv);
+int eject_main(int argc, char **argv)
 {
        unsigned long flags;
-       char *device;
-       struct mntent *m;
-       
-       flags = bb_getopt_ulflags(argc, argv, "t");
-       device=argv[optind] ? : DEFAULT_CDROM;
-       
-       if((m = find_mount_point(device, bb_path_mtab_file))) {
-               if(umount(m->mnt_dir))
-                       bb_error_msg_and_die("Can't umount");
-               else if(ENABLE_FEATURE_MTAB_SUPPORT) erase_mtab(m->mnt_fsname); 
-       }
-       if (ioctl(bb_xopen( device, (O_RDONLY | O_NONBLOCK)), 
-                 ( flags ? CDROMCLOSETRAY : CDROMEJECT)))
-       {
-               bb_perror_msg_and_die(device);
+       const char *device;
+       int dev, cmd;
+
+       opt_complementary = "?:?1:t--T:T--t";
+       flags = getopt32(argc, argv, "tT");
+       device = argv[optind] ? : "/dev/cdrom";
+
+       // We used to do "umount <device>" here, but it was buggy
+       // if something was mounted OVER cdrom and
+       // if cdrom is mounted many times.
+       //
+       // This works equally well (or better):
+       // #!/bin/sh
+       // umount /dev/cdrom
+       // eject
+
+       dev = xopen(device, O_RDONLY|O_NONBLOCK);
+       cmd = CDROMEJECT;
+       if (flags & FLAG_CLOSE
+        || (flags & FLAG_SMART && ioctl(dev, CDROM_DRIVE_STATUS) == CDS_TRAY_OPEN))
+               cmd = CDROMCLOSETRAY;
+       if (ioctl(dev, cmd)) {
+               bb_perror_msg_and_die("%s", device);
        }
-       return(EXIT_SUCCESS);
+
+       if (ENABLE_FEATURE_CLEAN_UP)
+               close(dev);
+
+       return EXIT_SUCCESS;
 }