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Avoid copying identical files

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This commit is contained in:
Pierre Pronchery 2011-05-11 20:42:06 +00:00
parent 9ce66c7e3a
commit 9c375f2970
1 changed files with 8 additions and 2 deletions
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10
src/cp.c
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@ -1,5 +1,5 @@
/* $Id$ */
/* Copyright (c) 2009 Pierre Pronchery <khorben@defora.org> */
/* Copyright (c) 2011 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Unix utils */
/* 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
@ -113,6 +113,12 @@ static int _cp_single(Prefs * prefs, char const * src, char const * dst)
return _cp_error(src, 1);
if(lstat(dst, &st2) == 0)
{
if(st.st_dev == st2.st_dev && st.st_ino == st2.st_ino)
{
fprintf(stderr, "%s: %s: \"%s\"%s\n", "cp", dst, src,
" is identical (not copied)");
return 0;
}
if(*prefs & CP_PREFS_i && _cp_confirm(dst) != 1)
return 0;
if(unlink(dst) != 0)
@ -232,7 +238,7 @@ static int _cp_single_regular(char const * src, char const * dst)
if(fwrite(buf, sizeof(char), size, fdst) != size)
break;
if(!feof(fsrc))
ret |= _cp_error(size == 0 ? src : dst, 1);
ret |= _cp_error((size == 0) ? src : dst, 1);
if(fclose(fsrc) != 0)
ret |= _cp_error(src, 1);
if(fclose(fdst) != 0)