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- /* cp-aux.c -- file copying (auxiliary routines)
- Copyright (C) 1989, 1990 Free Software Foundation.
-
- 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 1, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- Written by Torbjorn Granlund, Sweden (tege@sics.se).
- */
-
- #include <stdio.h>
-
- #include "cp.h"
-
- extern char *program_name;
-
- void
- usage (reason)
- char *reason;
- {
- if (reason != NULL)
- fprintf (stderr, "%s: %s\n", program_name, reason);
-
- fprintf (stderr, "\
- Usage: %s [-bdfioprvR] [-S backup-suffix] [-V {numbered,existing,simple}]\n\
- [+backup] [+no-dereference] [+force] [+interactive] [+one-file-system]\n\
- [+preserve] [+recursive] [+verbose] [+suffix backup-suffix]\n\
- [+version-control {numbered,existing,simple}] source dest\n\
- \n\
- %s [-bdfioprvR] [-S backup-suffix] [-V {numbered,existing,simple}]\n\
- [+backup] [+no-dereference] [+force] [+interactive] [+one-file-system]\n\
- [+preserve] [+recursive] [+verbose] [+suffix backup-suffix]\n\
- [+version-control {numbered,existing,simple}] source... directory\n",
- program_name, program_name);
-
- exit (2);
- }
-
- char *
- xmalloc (size)
- unsigned size;
- {
- char *x = malloc (size);
- if (x == 0)
- error (1, 0, "virtual memory exhausted");
- return x;
- }
-
- char *
- xrealloc (ptr, size)
- char *ptr;
- unsigned size;
- {
- char *x = realloc (ptr, size);
- if (x == 0)
- error (1, 0, "virtual memory exhausted");
- return x;
- }
-
- char *
- str_cpy (s1, s2)
- char *s1;
- char *s2;
- {
- while ((*s1++ = *s2++) != '\0')
- ;
- return s1 - 1;
- }
-
- int
- yesno ()
- {
- int c, t;
-
- fflush (stderr);
- c = t = getchar ();
- while (t != EOF && t != '\n')
- t = getchar ();
- return c == 'y' || c == 'Y';
- }
-
- int
- is_ancestor (sb, ancestors)
- struct stat *sb;
- struct dir_list *ancestors;
- {
- while (ancestors != 0)
- {
- if (ancestors->ino == sb->st_ino && ancestors->dev == sb->st_dev)
- return 1;
- ancestors = ancestors->parent;
- }
- return 0;
- }
-
- /* Remove trailing slashes from PATH; they cause some system calls to fail. */
-
- void
- strip_trailing_slashes (path)
- char *path;
- {
- int last;
-
- last = strlen (path) - 1;
- while (last > 0 && path[last] == '/')
- path[last--] = '\0';
- }
-