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fefb3c46a8
When diff hits certain access errors, function diffreg() shows the error
message, and then returns to the calling function, which calls
print_status() with the return value.
However, in these cases, the return value isn't changed from the initial
default value of D_SAME.
Normally, print_status() with a value of D_SAME does nothing, so this
works out ok, however, if the "-s" flag is set, a message is displayed
showing identicality:
case D_SAME:
if (sflag)
printf("Files %s%s and %s%s are identical\n", path1, entry, path2, entry);
break;
This then produces such results as:
% diff -s /COPYRIGHT /var/run/rpcbind.sock
diff: /var/run/rpcbind.sock: Operation not supported
Files /COPYRIGHT and /var/run/rpcbind.sock are identical
% diff -s /COPYRIGHT /etc/master.passwd
diff: /etc/master.passwd: Permission denied
Files /COPYRIGHT and /etc/master.passwd are identical
Create a D_ERROR status which is returned in such cases, and
print_status() then deals with that status seperately from D_SAME
PR: 252614
MFC after: 1 week
110 lines
4.2 KiB
C
110 lines
4.2 KiB
C
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/*ROR
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)diff.h 8.1 (Berkeley) 6/6/93
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <regex.h>
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/*
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* Output format options
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*/
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#define D_NORMAL 0 /* Normal output */
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#define D_EDIT -1 /* Editor script out */
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#define D_REVERSE 1 /* Reverse editor script */
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#define D_CONTEXT 2 /* Diff with context */
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#define D_UNIFIED 3 /* Unified context diff */
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#define D_IFDEF 4 /* Diff with merged #ifdef's */
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#define D_NREVERSE 5 /* Reverse ed script with numbered
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lines and no trailing . */
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#define D_BRIEF 6 /* Say if the files differ */
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#define D_GFORMAT 7 /* Diff with defined changed group format */
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#define D_SIDEBYSIDE 8 /* Side by side */
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#define D_UNSET -2
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/*
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* Output flags
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*/
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#define D_HEADER 0x001 /* Print a header/footer between files */
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#define D_EMPTY1 0x002 /* Treat first file as empty (/dev/null) */
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#define D_EMPTY2 0x004 /* Treat second file as empty (/dev/null) */
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/*
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* Command line flags
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*/
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#define D_FORCEASCII 0x008 /* Treat file as ascii regardless of content */
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#define D_FOLDBLANKS 0x010 /* Treat all white space as equal */
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#define D_MINIMAL 0x020 /* Make diff as small as possible */
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#define D_IGNORECASE 0x040 /* Case-insensitive matching */
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#define D_PROTOTYPE 0x080 /* Display C function prototype */
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#define D_EXPANDTABS 0x100 /* Expand tabs to spaces */
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#define D_IGNOREBLANKS 0x200 /* Ignore white space changes */
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#define D_STRIPCR 0x400 /* Strip trailing cr */
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#define D_SKIPBLANKLINES 0x800 /* Skip blank lines */
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/*
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* Status values for print_status() and diffreg() return values
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*/
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#define D_SAME 0 /* Files are the same */
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#define D_DIFFER 1 /* Files are different */
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#define D_BINARY 2 /* Binary files are different */
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#define D_MISMATCH1 3 /* path1 was a dir, path2 a file */
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#define D_MISMATCH2 4 /* path1 was a file, path2 a dir */
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#define D_SKIPPED1 5 /* path1 was a special file */
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#define D_SKIPPED2 6 /* path2 was a special file */
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#define D_ERROR 7 /* A file access error occurred */
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struct excludes {
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char *pattern;
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struct excludes *next;
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};
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extern int lflag, Nflag, Pflag, rflag, sflag, Tflag, cflag, Wflag;
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extern int diff_format, diff_context, status, ignore_file_case;
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extern int suppress_common;
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extern int tabsize, width;
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extern char *start, *ifdefname, *diffargs, *label[2], *ignore_pats;
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extern char *group_format;
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extern struct stat stb1, stb2;
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extern struct excludes *excludes_list;
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extern regex_t ignore_re;
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char *splice(char *, char *);
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int diffreg(char *, char *, int, int);
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int easprintf(char **, const char *, ...);
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void *emalloc(size_t);
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void *erealloc(void *, size_t);
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void diffdir(char *, char *, int);
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void print_only(const char *, size_t, const char *);
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void print_status(int, char *, char *, const char *);
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