487 lines
12 KiB
C++
487 lines
12 KiB
C++
/* mount.cc
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include <stdio.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <mntent.h>
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#include <windows.h>
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#include <sys/cygwin.h>
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#include <stdlib.h>
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#include <getopt.h>
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#ifdef errno
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#undef errno
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#endif
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#include <errno.h>
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#define EXEC_FLAGS (MOUNT_EXEC | MOUNT_NOTEXEC | MOUNT_CYGWIN_EXEC)
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static void mount_commands (void);
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static void show_mounts (void);
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static void show_cygdrive_info (void);
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static void change_cygdrive_prefix (const char *new_prefix, int flags);
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static int mount_already_exists (const char *posix_path, int flags);
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// static short create_missing_dirs = FALSE;
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static short force = FALSE;
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static const char version[] = "$Revision$";
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static const char *progname;
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static void
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error (const char *path)
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{
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fprintf (stderr, "%s: %s: %s\n", progname, path,
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(errno == EMFILE) ? "Too many mount entries" : strerror (errno));
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exit (1);
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}
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/* FIXME: do_mount should also print a warning message if the dev arg
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is a non-existent Win32 path. */
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static void
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do_mount (const char *dev, const char *where, int flags)
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{
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struct stat statbuf;
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char win32_path[MAX_PATH];
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int statres;
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cygwin_conv_to_win32_path (where, win32_path);
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statres = stat (win32_path, &statbuf);
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#if 0
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if (statres == -1)
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{
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/* FIXME: this'll fail if mount dir is missing any parent dirs */
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if (create_missing_dirs == TRUE)
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{
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if (mkdir (where, 0755) == -1)
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fprintf (stderr, "Warning: unable to create %s!\n", where);
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else
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statres = 0; /* Pretend stat succeeded if we could mkdir. */
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}
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}
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#endif
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if (statres == -1)
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{
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if (!force)
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fprintf (stderr, "%s: warning - %s does not exist.\n", progname, where);
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}
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else if (!(statbuf.st_mode & S_IFDIR))
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{
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if (!force)
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fprintf (stderr, "%s: warning: %s is not a directory.\n", progname, where);
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}
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if (!force && !(flags & EXEC_FLAGS) && strlen (dev))
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{
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char devtmp[1 + 2 * strlen (dev)];
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strcpy (devtmp, dev);
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char c = strchr (devtmp, '\0')[-1];
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if (c == '/' || c == '\\')
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strcat (devtmp, ".");
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/* Use a curious property of Windows which allows the use of \.. even
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on non-directory paths. */
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for (const char *p = dev; (p = strpbrk (p, "/\\")); p++)
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strcat (devtmp, "\\..");
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strcat (devtmp, "\\");
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if (GetDriveType (devtmp) == DRIVE_REMOTE)
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{
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fprintf (stderr, "%s: defaulting to '--no-executable' flag for speed since native path\n"
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"%*creferences a remote share. Use '-f' option to override.\n", progname,
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strlen(progname) + 2, ' ');
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flags |= MOUNT_NOTEXEC;
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}
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}
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if (mount (dev, where, flags))
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error (where);
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exit (0);
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}
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static struct option longopts[] =
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{
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{"binary", no_argument, NULL, 'b'},
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{"change-cygdrive-prefix", no_argument, NULL, 'c'},
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{"cygwin-executable", no_argument, NULL, 'X'},
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{"executable", no_argument, NULL, 'x'},
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{"force", no_argument, NULL, 'f'},
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{"help", no_argument, NULL, 'h' },
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{"import-old-mounts", no_argument, NULL, 'i'},
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{"mount-commands", no_argument, NULL, 'm'},
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{"no-executable", no_argument, NULL, 'E'},
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{"show-cygdrive-prefix", no_argument, NULL, 'p'},
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{"system", no_argument, NULL, 's'},
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{"text", no_argument, NULL, 't'},
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{"user", no_argument, NULL, 'u'},
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{"version", no_argument, NULL, 'v'},
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{NULL, 0, NULL, 0}
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};
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static char opts[] = "bcfhimpstuvxEX";
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static void
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usage (FILE *where = stderr)
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{
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fprintf (where, "Usage: %s [OPTION] [<win32path> <posixpath>]\n\
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-b, --binary text files are equivalent to binary files\n\
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(newline = \\n)\n\
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-c, --change-cygdrive-prefix change the cygdrive path prefix to <posixpath>\n\
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-f, --force force mount, don't warn about missing mount\n\
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point directories\n\
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-h, --help output usage information and exit\n\
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-i, --import-old-mounts copy old registry mount table mounts into the\n\
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current mount areas\n\
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-m, --mount-commands write mount commands to replace user and\n\
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system mount points and cygdrive prefixes\n\
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-p, --show-cygdrive-prefix show user and/or system cygdrive path prefix\n\
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-s, --system (default) add system-wide mount point\n\
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-t, --text (default) text files get \\r\\n line endings\n\
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-u, --user add user-only mount point\n\
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-v, --version output version information and exit\n\
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-x, --executable treat all files under mount point as executables\n\
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-E, --no-executable treat all files under mount point as \n\
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non-executables\n\
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-X, --cygwin-executable treat all files under mount point as cygwin\n\
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executables\n\
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", progname);
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exit (where == stderr ? 1 : 0);
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}
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static void
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print_version ()
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{
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const char *v = strchr (version, ':');
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int len;
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if (!v)
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{
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v = "?";
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len = 1;
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}
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else
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{
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v += 2;
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len = strchr (v, ' ') - v;
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}
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printf ("\
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%s (cygwin) %.*s\n\
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Filesystem Utility\n\
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.\n\
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Compiled on %s", progname, len, v, __DATE__);
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}
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int
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main (int argc, char **argv)
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{
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int i;
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int flags = MOUNT_BINARY;
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int default_flag = MOUNT_SYSTEM;
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enum do_what
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{
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nada,
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saw_change_cygdrive_prefix,
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saw_import_old_mounts,
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saw_show_cygdrive_prefix,
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saw_mount_commands
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} do_what = nada;
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progname = strrchr (argv[0], '/');
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if (progname == NULL)
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progname = strrchr (argv[0], '\\');
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if (progname == NULL)
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progname = argv[0];
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else
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progname++;
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if (argc == 1)
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{
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show_mounts ();
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exit (0);
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}
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while ((i = getopt_long (argc, argv, opts, longopts, NULL)) != EOF)
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switch (i)
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{
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case 'b':
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flags |= MOUNT_BINARY;
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break;
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case 'c':
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if (do_what == nada)
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do_what = saw_change_cygdrive_prefix;
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else
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usage ();
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break;
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case 'f':
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force = TRUE;
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break;
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case 'h':
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usage (stdout);
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break;
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case 'i':
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if (do_what == nada)
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do_what = saw_import_old_mounts;
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else
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usage ();
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break;
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case 'm':
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if (do_what == nada)
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do_what = saw_mount_commands;
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else
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usage ();
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break;
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case 'p':
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if (do_what == nada)
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do_what = saw_show_cygdrive_prefix;
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else
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usage ();
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break;
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case 's':
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flags |= MOUNT_SYSTEM;
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break;
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case 't':
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flags &= ~MOUNT_BINARY;
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break;
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case 'u':
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flags &= ~MOUNT_SYSTEM;
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default_flag = 0;
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break;
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case 'v':
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print_version ();
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return 0;
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break;
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case 'x':
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flags |= MOUNT_EXEC;
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break;
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case 'E':
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flags |= MOUNT_NOTEXEC;
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break;
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case 'X':
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flags |= MOUNT_CYGWIN_EXEC;
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break;
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default:
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usage ();
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}
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if (flags & MOUNT_NOTEXEC && flags & (MOUNT_EXEC | MOUNT_CYGWIN_EXEC))
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{
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fprintf (stderr, "%s: invalid combination of executable options\n", progname);
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exit (1);
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}
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argc--;
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switch (do_what)
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{
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case saw_change_cygdrive_prefix:
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if (optind != argc)
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usage ();
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change_cygdrive_prefix (argv[optind], flags);
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break;
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case saw_import_old_mounts:
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if (optind <= argc)
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usage ();
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else
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cygwin_internal (CW_READ_V1_MOUNT_TABLES);
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break;
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case saw_show_cygdrive_prefix:
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if (optind <= argc)
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usage ();
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show_cygdrive_info ();
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break;
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case saw_mount_commands:
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if (optind <= argc)
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usage ();
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mount_commands ();
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break;
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default:
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if (optind != (argc - 1))
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{
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if (optind >= argc)
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fprintf (stderr, "%s: not enough arguments\n", progname);
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else
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fprintf (stderr, "%s: too many arguments\n", progname);
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usage ();
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}
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if (force || !mount_already_exists (argv[optind + 1], flags))
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do_mount (argv[optind], argv[optind + 1], flags | default_flag);
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else
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{
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errno = EBUSY;
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error (argv[optind + 1]);
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}
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}
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/* NOTREACHED */
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return 0;
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}
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static void
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mount_commands (void)
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{
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FILE *m = setmntent ("/-not-used-", "r");
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struct mntent *p;
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char *c;
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const char *format_mnt = "mount%s \"%s\" \"%s\"\n";
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const char *format_cyg = "mount%s --change-cygdrive-prefix \"%s\"\n";
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char opts[MAX_PATH];
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char user[MAX_PATH];
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char system[MAX_PATH];
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char user_flags[MAX_PATH];
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char system_flags[MAX_PATH];
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// write mount commands for user and system mount points
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while ((p = getmntent (m)) != NULL) {
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// Only list non-cygdrives
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if (!strstr (p->mnt_opts, ",noumount")) {
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strcpy(opts, " -f");
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if (p->mnt_type[0] == 'u')
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strcat (opts, " -u");
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else if (p->mnt_type[0] == 's')
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strcat (opts, " -s");
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if (p->mnt_opts[0] == 'b')
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strcat (opts, " -b");
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else if (p->mnt_opts[0] == 't')
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strcat (opts, " -t");
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if (strstr (p->mnt_opts, ",exec"))
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strcat (opts, " -x");
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if (strstr (p->mnt_opts, ",noexec"))
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strcat (opts, " -E");
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while ((c = strchr (p->mnt_fsname, '\\')) != NULL)
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*c = '/';
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printf (format_mnt, opts, p->mnt_fsname, p->mnt_dir);
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}
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}
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endmntent (m);
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// write mount commands for cygdrive prefixes
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cygwin_internal (CW_GET_CYGDRIVE_INFO, user, system, user_flags,
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system_flags);
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if (strlen (user) > 0) {
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strcpy (opts, " ");
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if (user_flags[0] == 'b')
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strcat (opts, " -b");
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else if (user_flags[0] == 't')
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strcat (opts, " -t");
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printf (format_cyg, opts, user);
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}
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if (strlen (system) > 0) {
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strcpy (opts, " -s");
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if (system_flags[0] == 'b')
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strcat (opts, " -b");
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else if (system_flags[0] == 't')
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strcat (opts, " -t");
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printf (format_cyg, opts, system);
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}
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exit(0);
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}
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static void
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show_mounts (void)
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{
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FILE *m = setmntent ("/-not-used-", "r");
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struct mntent *p;
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const char *format = "%s on %s type %s (%s)\n";
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// printf (format, "Device", "Directory", "Type", "Flags");
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while ((p = getmntent (m)) != NULL)
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printf (format, p->mnt_fsname, p->mnt_dir, p->mnt_type, p->mnt_opts);
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endmntent (m);
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}
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/* Return 1 if mountpoint from the same registry area is already in
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mount table. Otherwise return 0. */
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static int
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mount_already_exists (const char *posix_path, int flags)
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{
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int found_matching = 0;
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FILE *m = setmntent ("/-not-used-", "r");
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struct mntent *p;
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while ((p = getmntent (m)) != NULL)
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{
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/* if the paths match, and they're both the same type of mount. */
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if (strcmp (p->mnt_dir, posix_path) == 0)
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{
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if (p->mnt_type[0] == 'u')
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{
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if (!(flags & MOUNT_SYSTEM)) /* both current_user */
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found_matching = 1;
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else
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fprintf (stderr,
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"%s: warning: system mount point of '%s' "
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"will always be masked by user mount.\n",
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progname, posix_path);
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break;
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}
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else if (p->mnt_type[0] == 's')
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{
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if (flags & MOUNT_SYSTEM) /* both system */
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found_matching = 1;
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else
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fprintf (stderr,
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"%s: warning: user mount point of '%s' "
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"masks system mount.\n",
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progname, posix_path);
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break;
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}
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else
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{
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fprintf (stderr, "%s: warning: couldn't determine mount type.\n", progname);
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break;
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}
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}
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}
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endmntent (m);
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return found_matching;
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}
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/* change_cygdrive_prefix: Change the cygdrive prefix */
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static void
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change_cygdrive_prefix (const char *new_prefix, int flags)
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{
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flags |= MOUNT_AUTO;
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if (mount (NULL, new_prefix, flags))
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error (new_prefix);
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exit (0);
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}
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/* show_cygdrive_info: Show the user and/or cygdrive info, i.e., prefix and
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flags.*/
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static void
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show_cygdrive_info ()
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{
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/* Get the cygdrive info */
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char user[MAX_PATH];
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char system[MAX_PATH];
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char user_flags[MAX_PATH];
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char system_flags[MAX_PATH];
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cygwin_internal (CW_GET_CYGDRIVE_INFO, user, system, user_flags,
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system_flags);
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/* Display the user and system cygdrive path prefix, if necessary
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(ie, not empty) */
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const char *format = "%-18s %-11s %s\n";
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printf (format, "Prefix", "Type", "Flags");
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if (strlen (user) > 0)
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printf (format, user, "user", user_flags);
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if (strlen (system) > 0)
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printf (format, system, "system", system_flags);
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exit (0);
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}
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