618595e7c7
Print usage() if right before executing the specified command, it comes to be that *argv is NULL (i.e. a flag was specified without a command being given).
1618 lines
34 KiB
C
1618 lines
34 KiB
C
/*
|
||
* Copyright (c) 1980, 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
|
||
* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
|
||
* 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
|
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* California, Berkeley and its contributors.
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* 4. 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1980, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)sccs.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <signal.h>
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#include <sysexits.h>
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#include <dirent.h>
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#include <errno.h>
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#include "pathnames.h"
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#include <paths.h>
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#include <pwd.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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/*
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** SCCS.C -- human-oriented front end to the SCCS system.
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**
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** Without trying to add any functionality to speak of, this
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** program tries to make SCCS a little more accessible to human
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** types. The main thing it does is automatically put the
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** string "SCCS/s." on the front of names. Also, it has a
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** couple of things that are designed to shorten frequent
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** combinations, e.g., "delget" which expands to a "delta"
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** and a "get".
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**
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** This program can also function as a setuid front end.
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** To do this, you should copy the source, renaming it to
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** whatever you want, e.g., "syssccs". Change any defaults
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** in the program (e.g., syssccs might default -d to
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** "/usr/src/sys"). Then recompile and put the result
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** as setuid to whomever you want. In this mode, sccs
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** knows to not run setuid for certain programs in order
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** to preserve security, and so forth.
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**
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** Usage:
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** sccs [flags] command [args]
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**
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** Flags:
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** -d<dir> <dir> represents a directory to search
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** out of. It should be a full pathname
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** for general usage. E.g., if <dir> is
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** "/usr/src/sys", then a reference to the
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** file "dev/bio.c" becomes a reference to
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** "/usr/src/sys/dev/bio.c".
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** -p<path> prepends <path> to the final component
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** of the pathname. By default, this is
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** "SCCS". For example, in the -d example
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** above, the path then gets modified to
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** "/usr/src/sys/dev/SCCS/s.bio.c". In
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** more common usage (without the -d flag),
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** "prog.c" would get modified to
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** "SCCS/s.prog.c". In both cases, the
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** "s." gets automatically prepended.
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** -r run as the real user.
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**
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** Commands:
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** admin,
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** get,
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** delta,
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** rmdel,
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** cdc,
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** etc. Straight out of SCCS; only difference
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** is that pathnames get modified as
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** described above.
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** enter Front end doing "sccs admin -i<name> <name>"
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** create Macro for "enter" followed by "get".
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** edit Macro for "get -e".
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** unedit Removes a file being edited, knowing
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** about p-files, etc.
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** delget Macro for "delta" followed by "get".
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** deledit Macro for "delta" followed by "get -e".
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** branch Macro for "get -b -e", followed by "delta
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** -s -n", followd by "get -e -t -g".
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** diffs "diff" the specified version of files
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** and the checked-out version.
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** print Macro for "prs -e" followed by "get -p -m".
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** tell List what files are being edited.
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** info Print information about files being edited.
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** clean Remove all files that can be
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** regenerated from SCCS files.
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** check Like info, but return exit status, for
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** use in makefiles.
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** fix Remove a top delta & reedit, but save
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** the previous changes in that delta.
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**
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** Compilation Flags:
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** UIDUSER -- determine who the user is by looking at the
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** uid rather than the login name -- for machines
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** where SCCS gets the user in this way.
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** SCCSDIR -- if defined, forces the -d flag to take on
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** this value. This is so that the setuid
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** aspects of this program cannot be abused.
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** This flag also disables the -p flag.
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** SCCSPATH -- the default for the -p flag.
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** MYNAME -- the title this program should print when it
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** gives error messages.
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**
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** Compilation Instructions:
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** cc -O -n -s sccs.c
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** The flags listed above can be -D defined to simplify
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** recompilation for variant versions.
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**
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** Author:
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** Eric Allman, UCB/INGRES
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** Copyright 1980 Regents of the University of California
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*/
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/******************* Configuration Information ********************/
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# ifndef SCCSPATH
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# define SCCSPATH "SCCS" /* pathname in which to find s-files */
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# endif /* NOT SCCSPATH */
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# ifndef MYNAME
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# define MYNAME "sccs" /* name used for printing errors */
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# endif /* NOT MYNAME */
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/**************** End of Configuration Information ****************/
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typedef char bool;
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# define TRUE 1
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# define FALSE 0
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# define bitset(bit, word) ((bool) ((bit) & (word)))
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struct sccsprog
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{
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char *sccsname; /* name of SCCS routine */
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short sccsoper; /* opcode, see below */
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short sccsflags; /* flags, see below */
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char *sccspath; /* pathname of binary implementing */
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};
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/* values for sccsoper */
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# define PROG 0 /* call a program */
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# define CMACRO 1 /* command substitution macro */
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# define FIX 2 /* fix a delta */
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# define CLEAN 3 /* clean out recreatable files */
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# define UNEDIT 4 /* unedit a file */
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# define SHELL 5 /* call a shell file (like PROG) */
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# define DIFFS 6 /* diff between sccs & file out */
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# define DODIFF 7 /* internal call to diff program */
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# define ENTER 8 /* enter new files */
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/* bits for sccsflags */
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# define NO_SDOT 0001 /* no s. on front of args */
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# define REALUSER 0002 /* protected (e.g., admin) */
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/* modes for the "clean", "info", "check" ops */
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# define CLEANC 0 /* clean command */
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# define INFOC 1 /* info command */
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# define CHECKC 2 /* check command */
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# define TELLC 3 /* give list of files being edited */
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/*
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** Description of commands known to this program.
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** First argument puts the command into a class. Second arg is
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** info regarding treatment of this command. Third arg is a
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** list of flags this command accepts from macros, etc. Fourth
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** arg is the pathname of the implementing program, or the
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** macro definition, or the arg to a sub-algorithm.
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*/
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struct sccsprog SccsProg[] = {
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{ "admin", PROG, REALUSER, _PATH_SCCSADMIN },
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{ "cdc", PROG, 0, _PATH_SCCSRMDEL },
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{ "comb", PROG, 0, _PATH_SCCSCOMB },
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{ "delta", PROG, 0, _PATH_SCCSDELTA },
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{ "get", PROG, 0, _PATH_SCCSGET },
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{ "help", PROG, NO_SDOT, _PATH_SCCSHELP },
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{ "prs", PROG, 0, _PATH_SCCSPRS },
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{ "prt", PROG, 0, _PATH_SCCSPRT },
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{ "rmdel", PROG, REALUSER, _PATH_SCCSRMDEL },
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{ "val", PROG, 0, _PATH_SCCSVAL },
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{ "what", PROG, NO_SDOT, _PATH_SCCSWHAT },
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{ "sccsdiff", SHELL, REALUSER, _PATH_SCCSDIFF },
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{ "edit", CMACRO, NO_SDOT, "get -e" },
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{ "delget", CMACRO, NO_SDOT, "delta:mysrp/get:ixbeskcl -t" },
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{ "deledit", CMACRO, NO_SDOT,
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"delta:mysrp -n/get:ixbskcl -e -t -g" },
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{ "fix", FIX, NO_SDOT, NULL },
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{ "clean", CLEAN, REALUSER|NO_SDOT,
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(char *) CLEANC },
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{ "info", CLEAN, REALUSER|NO_SDOT,
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(char *) INFOC },
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{ "check", CLEAN, REALUSER|NO_SDOT,
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(char *) CHECKC },
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{ "tell", CLEAN, REALUSER|NO_SDOT,
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(char *) TELLC },
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{ "unedit", UNEDIT, NO_SDOT, NULL },
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{ "diffs", DIFFS, NO_SDOT|REALUSER,
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NULL },
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{ "-diff", DODIFF, NO_SDOT|REALUSER,
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_PATH_SCCSBDIFF },
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{ "print", CMACRO, 0, "prs -e/get -p -m -s" },
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{ "branch", CMACRO, NO_SDOT,
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"get:ixrc -e -b/delta: -s -n -ybranch-place-holder/get:pl -e -t -g" },
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{ "enter", ENTER, NO_SDOT, NULL },
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{ "create", CMACRO, NO_SDOT, "enter/get:ixbeskcl -t" },
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{ NULL, -1, 0, NULL }
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};
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/* one line from a p-file */
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struct pfile
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{
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char *p_osid; /* old SID */
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char *p_nsid; /* new SID */
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char *p_user; /* user who did edit */
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char *p_date; /* date of get */
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char *p_time; /* time of get */
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char *p_aux; /* extra info at end */
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};
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||
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char *SccsPath = SCCSPATH; /* pathname of SCCS files */
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# ifdef SCCSDIR
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char *SccsDir = SCCSDIR; /* directory to begin search from */
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# else
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char *SccsDir = "";
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# endif
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char MyName[] = MYNAME; /* name used in messages */
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int OutFile = -1; /* override output file for commands */
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||
bool RealUser; /* if set, running as real user */
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# ifdef DEBUG
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bool Debug; /* turn on tracing */
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# endif
|
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int callprog(char *, short, char **, bool);
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int clean(int, char **);
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int command(char **, bool, char *);
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int dodiff(char **, char *);
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struct pfile *getpfent(FILE *);
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bool isbranch(char *);
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bool isdir(char *);
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struct sccsprog *lookup(char *);
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char *makefile(char *);
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char *nextfield(char *);
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||
void putpfent(struct pfile *, FILE *);
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||
bool safepath(char *);
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||
void syserr(const char *, ...);
|
||
char *tail(char *);
|
||
char *username(void);
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bool unedit(char *);
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int usrerr(const char *, ...);
|
||
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void gstrbotch(const char *, const char *);
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char *gstrcat(char *, const char *, size_t);
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char *gstrcpy(char *, const char *, size_t);
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char *gstrncat(char *, const char *, size_t, size_t);
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static void usage(void);
|
||
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#define FBUFSIZ BUFSIZ
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#define PFILELG 120
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int
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||
main(int argc, char *argv[])
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||
{
|
||
char *p;
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||
int i;
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||
# ifndef SCCSDIR
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||
struct passwd *pw;
|
||
char buf[FBUFSIZ];
|
||
|
||
/* pull "SccsDir" out of the environment (possibly) */
|
||
p = getenv("PROJECTDIR");
|
||
if (p != NULL && p[0] != '\0')
|
||
{
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||
if (p[0] == '/')
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||
SccsDir = p;
|
||
else
|
||
{
|
||
pw = getpwnam(p);
|
||
if (pw == NULL)
|
||
{
|
||
usrerr("user %s does not exist", p);
|
||
exit(EX_USAGE);
|
||
}
|
||
gstrcpy(buf, pw->pw_dir, sizeof(buf));
|
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gstrcat(buf, "/src", sizeof(buf));
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||
if (access(buf, 0) < 0)
|
||
{
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||
gstrcpy(buf, pw->pw_dir, sizeof(buf));
|
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gstrcat(buf, "/source", sizeof(buf));
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||
if (access(buf, 0) < 0)
|
||
{
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||
usrerr("project %s has no source!", p);
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||
exit(EX_USAGE);
|
||
}
|
||
}
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||
SccsDir = buf;
|
||
}
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||
}
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# endif /* SCCSDIR */
|
||
|
||
/*
|
||
** Detect and decode flags intended for this program.
|
||
*/
|
||
|
||
if (argc < 2)
|
||
{
|
||
usage();
|
||
}
|
||
argv[argc] = NULL;
|
||
|
||
if (lookup(argv[0]) == NULL)
|
||
{
|
||
while ((p = *++argv) != NULL)
|
||
{
|
||
if (*p != '-')
|
||
break;
|
||
switch (*++p)
|
||
{
|
||
case 'r': /* run as real user */
|
||
setuid(getuid());
|
||
RealUser++;
|
||
break;
|
||
|
||
# ifndef SCCSDIR
|
||
case 'p': /* path of sccs files */
|
||
SccsPath = ++p;
|
||
if (SccsPath[0] == '\0' && argv[1] != NULL)
|
||
SccsPath = *++argv;
|
||
break;
|
||
|
||
case 'd': /* directory to search from */
|
||
SccsDir = ++p;
|
||
if (SccsDir[0] == '\0' && argv[1] != NULL)
|
||
SccsDir = *++argv;
|
||
break;
|
||
# endif
|
||
|
||
# ifdef DEBUG
|
||
case 'T': /* trace */
|
||
Debug++;
|
||
break;
|
||
# endif
|
||
|
||
default:
|
||
usrerr("unknown option -%s", p);
|
||
break;
|
||
}
|
||
}
|
||
if (SccsPath[0] == '\0')
|
||
SccsPath = ".";
|
||
}
|
||
|
||
if (*argv == NULL)
|
||
{
|
||
usage();
|
||
}
|
||
i = command(argv, FALSE, "");
|
||
exit(i);
|
||
}
|
||
|
||
/*
|
||
** USAGE -- print usage
|
||
**
|
||
** This function prints the usage for this program.
|
||
*/
|
||
static void
|
||
usage(void)
|
||
{
|
||
fprintf(stderr, "Usage: %s [flags] command [flags]\n", MyName);
|
||
exit(EX_USAGE);
|
||
}
|
||
|
||
/*
|
||
** COMMAND -- look up and perform a command
|
||
**
|
||
** This routine is the guts of this program. Given an
|
||
** argument vector, it looks up the "command" (argv[0])
|
||
** in the configuration table and does the necessary stuff.
|
||
**
|
||
** Parameters:
|
||
** argv -- an argument vector to process.
|
||
** forkflag -- if set, fork before executing the command.
|
||
** editflag -- if set, only include flags listed in the
|
||
** sccsklets field of the command descriptor.
|
||
** arg0 -- a space-seperated list of arguments to insert
|
||
** before argv.
|
||
**
|
||
** Returns:
|
||
** zero -- command executed ok.
|
||
** else -- error status.
|
||
**
|
||
** Side Effects:
|
||
** none.
|
||
*/
|
||
|
||
int
|
||
command(char **argv, bool forkflag, char *arg0)
|
||
{
|
||
struct sccsprog *cmd;
|
||
char *p;
|
||
char buf[FBUFSIZ];
|
||
char *nav[1000];
|
||
char **np;
|
||
char **ap;
|
||
int i;
|
||
char *q;
|
||
int rval = 0;
|
||
char *editchs;
|
||
|
||
# ifdef DEBUG
|
||
if (Debug)
|
||
{
|
||
printf("command:\n\t\"%s\"\n", arg0);
|
||
for (np = argv; *np != NULL; np++)
|
||
printf("\t\"%s\"\n", *np);
|
||
}
|
||
# endif
|
||
|
||
/*
|
||
** Copy arguments.
|
||
** Copy from arg0 & if necessary at most one arg
|
||
** from argv[0].
|
||
*/
|
||
|
||
np = ap = &nav[1];
|
||
editchs = NULL;
|
||
for (p = arg0, q = buf; *p != '\0' && *p != '/'; )
|
||
{
|
||
*np++ = q;
|
||
while (*p == ' ')
|
||
p++;
|
||
while (*p != ' ' && *p != '\0' && *p != '/' && *p != ':')
|
||
*q++ = *p++;
|
||
*q++ = '\0';
|
||
if (*p == ':')
|
||
{
|
||
editchs = q;
|
||
while (*++p != '\0' && *p != '/' && *p != ' ')
|
||
*q++ = *p;
|
||
*q++ = '\0';
|
||
}
|
||
}
|
||
*np = NULL;
|
||
if (*ap == NULL)
|
||
*np++ = *argv++;
|
||
|
||
/*
|
||
** Look up command.
|
||
** At this point, *ap is the command name.
|
||
*/
|
||
|
||
cmd = lookup(*ap);
|
||
if (cmd == NULL)
|
||
{
|
||
usrerr("Unknown command \"%s\"", *ap);
|
||
return (EX_USAGE);
|
||
}
|
||
|
||
/*
|
||
** Copy remaining arguments doing editing as appropriate.
|
||
*/
|
||
|
||
for (; *argv != NULL; argv++)
|
||
{
|
||
p = *argv;
|
||
if (*p == '-')
|
||
{
|
||
if (p[1] == '\0' || editchs == NULL || index(editchs, p[1]) != NULL)
|
||
*np++ = p;
|
||
}
|
||
else
|
||
{
|
||
if (!bitset(NO_SDOT, cmd->sccsflags))
|
||
p = makefile(p);
|
||
if (p != NULL)
|
||
*np++ = p;
|
||
}
|
||
}
|
||
*np = NULL;
|
||
|
||
/*
|
||
** Interpret operation associated with this command.
|
||
*/
|
||
|
||
switch (cmd->sccsoper)
|
||
{
|
||
case SHELL: /* call a shell file */
|
||
*ap = cmd->sccspath;
|
||
*--ap = "sh";
|
||
rval = callprog(_PATH_BSHELL, cmd->sccsflags, ap, forkflag);
|
||
break;
|
||
|
||
case PROG: /* call an sccs prog */
|
||
rval = callprog(cmd->sccspath, cmd->sccsflags, ap, forkflag);
|
||
break;
|
||
|
||
case CMACRO: /* command macro */
|
||
/* step through & execute each part of the macro */
|
||
for (p = cmd->sccspath; *p != '\0'; p++)
|
||
{
|
||
q = p;
|
||
while (*p != '\0' && *p != '/')
|
||
p++;
|
||
rval = command(&ap[1], *p != '\0', q);
|
||
if (rval != 0)
|
||
break;
|
||
}
|
||
break;
|
||
|
||
case FIX: /* fix a delta */
|
||
if (ap[1]==0 || strncmp(ap[1], "-r", 2)!=0)
|
||
{
|
||
usrerr("-r flag needed for fix command");
|
||
rval = EX_USAGE;
|
||
break;
|
||
}
|
||
|
||
/* get the version with all changes */
|
||
rval = command(&ap[1], TRUE, "get -k");
|
||
|
||
/* now remove that version from the s-file */
|
||
if (rval == 0)
|
||
rval = command(&ap[1], TRUE, "rmdel:r");
|
||
|
||
/* and edit the old version (but don't clobber new vers) */
|
||
if (rval == 0)
|
||
rval = command(&ap[2], FALSE, "get -e -g");
|
||
break;
|
||
|
||
case CLEAN:
|
||
rval = clean((int) cmd->sccspath, ap);
|
||
break;
|
||
|
||
case UNEDIT:
|
||
for (argv = np = &ap[1]; *argv != NULL; argv++)
|
||
{
|
||
if (unedit(*argv))
|
||
*np++ = *argv;
|
||
}
|
||
*np = NULL;
|
||
|
||
/* get all the files that we unedited successfully */
|
||
if (np > &ap[1])
|
||
rval = command(&ap[1], FALSE, "get");
|
||
break;
|
||
|
||
case DIFFS: /* diff between s-file & edit file */
|
||
/* find the end of the flag arguments */
|
||
for (np = &ap[1]; *np != NULL && **np == '-'; np++)
|
||
continue;
|
||
argv = np;
|
||
|
||
/* for each file, do the diff */
|
||
p = argv[1];
|
||
while (*np != NULL)
|
||
{
|
||
/* messy, but we need a null terminated argv */
|
||
*argv = *np++;
|
||
argv[1] = NULL;
|
||
i = dodiff(ap, tail(*argv));
|
||
if (rval == 0)
|
||
rval = i;
|
||
argv[1] = p;
|
||
}
|
||
break;
|
||
|
||
case DODIFF: /* internal diff call */
|
||
setuid(getuid());
|
||
for (np = ap; *np != NULL; np++)
|
||
{
|
||
if ((*np)[0] == '-' && (*np)[1] == 'C')
|
||
(*np)[1] = 'c';
|
||
}
|
||
|
||
/* insert "-" argument */
|
||
np[1] = NULL;
|
||
np[0] = np[-1];
|
||
np[-1] = "-";
|
||
|
||
/* execute the diff program of choice */
|
||
execvp("diff", ap);
|
||
execv(cmd->sccspath, argv);
|
||
syserr("cannot exec %s", cmd->sccspath);
|
||
exit(EX_OSERR);
|
||
|
||
case ENTER: /* enter new sccs files */
|
||
/* skip over flag arguments */
|
||
for (np = &ap[1]; *np != NULL && **np == '-'; np++)
|
||
continue;
|
||
argv = np;
|
||
|
||
/* do an admin for each file */
|
||
p = argv[1];
|
||
while (*np != NULL)
|
||
{
|
||
printf("\n%s:\n", *np);
|
||
strcpy(buf, "-i");
|
||
gstrcat(buf, *np, sizeof(buf));
|
||
ap[0] = buf;
|
||
argv[0] = tail(*np);
|
||
argv[1] = NULL;
|
||
rval = command(ap, TRUE, "admin");
|
||
argv[1] = p;
|
||
if (rval == 0)
|
||
{
|
||
strcpy(buf, ",");
|
||
gstrcat(buf, tail(*np), sizeof(buf));
|
||
if (link(*np, buf) >= 0)
|
||
unlink(*np);
|
||
}
|
||
np++;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
syserr("oper %d", cmd->sccsoper);
|
||
exit(EX_SOFTWARE);
|
||
}
|
||
# ifdef DEBUG
|
||
if (Debug)
|
||
printf("command: rval=%d\n", rval);
|
||
# endif
|
||
return (rval);
|
||
}
|
||
|
||
/*
|
||
** LOOKUP -- look up an SCCS command name.
|
||
**
|
||
** Parameters:
|
||
** name -- the name of the command to look up.
|
||
**
|
||
** Returns:
|
||
** ptr to command descriptor for this command.
|
||
** NULL if no such entry.
|
||
**
|
||
** Side Effects:
|
||
** none.
|
||
*/
|
||
|
||
struct sccsprog *
|
||
lookup(char *name)
|
||
{
|
||
struct sccsprog *cmd;
|
||
|
||
for (cmd = SccsProg; cmd->sccsname != NULL; cmd++)
|
||
{
|
||
if (strcmp(cmd->sccsname, name) == 0)
|
||
return (cmd);
|
||
}
|
||
return (NULL);
|
||
}
|
||
|
||
/*
|
||
** CALLPROG -- call a program
|
||
**
|
||
** Used to call the SCCS programs.
|
||
**
|
||
** Parameters:
|
||
** progpath -- pathname of the program to call.
|
||
** flags -- status flags from the command descriptors.
|
||
** argv -- an argument vector to pass to the program.
|
||
** forkflag -- if true, fork before calling, else just
|
||
** exec.
|
||
**
|
||
** Returns:
|
||
** The exit status of the program.
|
||
** Nothing if forkflag == FALSE.
|
||
**
|
||
** Side Effects:
|
||
** Can exit if forkflag == FALSE.
|
||
*/
|
||
|
||
int
|
||
callprog(char *progpath, short flags, char **argv, bool forkflag)
|
||
{
|
||
int i;
|
||
int wpid;
|
||
auto int st;
|
||
int sigcode;
|
||
int coredumped;
|
||
const char *sigmsg;
|
||
char sigmsgbuf[10+1]; /* "Signal 127" + terminating '\0' */
|
||
|
||
# ifdef DEBUG
|
||
if (Debug)
|
||
{
|
||
printf("callprog:\n");
|
||
for (i = 0; argv[i] != NULL; i++)
|
||
printf("\t\"%s\"\n", argv[i]);
|
||
}
|
||
# endif
|
||
|
||
if (*argv == NULL)
|
||
return (-1);
|
||
|
||
/*
|
||
** Fork if appropriate.
|
||
*/
|
||
|
||
if (forkflag)
|
||
{
|
||
# ifdef DEBUG
|
||
if (Debug)
|
||
printf("Forking\n");
|
||
# endif
|
||
i = fork();
|
||
if (i < 0)
|
||
{
|
||
syserr("cannot fork");
|
||
exit(EX_OSERR);
|
||
}
|
||
else if (i > 0)
|
||
{
|
||
while ((wpid = wait(&st)) != -1 && wpid != i)
|
||
;
|
||
if ((sigcode = st & 0377) == 0)
|
||
st = (st >> 8) & 0377;
|
||
else
|
||
{
|
||
coredumped = sigcode & 0200;
|
||
sigcode &= 0177;
|
||
if (sigcode != SIGINT && sigcode != SIGPIPE)
|
||
{
|
||
if (sigcode < NSIG)
|
||
sigmsg = sys_siglist[sigcode];
|
||
else
|
||
{
|
||
sprintf(sigmsgbuf, "Signal %d",
|
||
sigcode);
|
||
sigmsg = sigmsgbuf;
|
||
}
|
||
fprintf(stderr, "sccs: %s: %s%s", argv[0],
|
||
sigmsg,
|
||
coredumped ? " - core dumped": "");
|
||
}
|
||
st = EX_SOFTWARE;
|
||
}
|
||
if (OutFile >= 0)
|
||
{
|
||
close(OutFile);
|
||
OutFile = -1;
|
||
}
|
||
return (st);
|
||
}
|
||
}
|
||
else if (OutFile >= 0)
|
||
{
|
||
syserr("callprog: setting stdout w/o forking");
|
||
exit(EX_SOFTWARE);
|
||
}
|
||
|
||
/* set protection as appropriate */
|
||
if (bitset(REALUSER, flags))
|
||
setuid(getuid());
|
||
|
||
/* change standard input & output if needed */
|
||
if (OutFile >= 0)
|
||
{
|
||
close(1);
|
||
dup(OutFile);
|
||
close(OutFile);
|
||
}
|
||
|
||
/* call real SCCS program */
|
||
execv(progpath, argv);
|
||
syserr("cannot execute %s", progpath);
|
||
exit(EX_UNAVAILABLE);
|
||
/*NOTREACHED*/
|
||
}
|
||
|
||
/*
|
||
** MAKEFILE -- make filename of SCCS file
|
||
**
|
||
** If the name passed is already the name of an SCCS file,
|
||
** just return it. Otherwise, munge the name into the name
|
||
** of the actual SCCS file.
|
||
**
|
||
** There are cases when it is not clear what you want to
|
||
** do. For example, if SccsPath is an absolute pathname
|
||
** and the name given is also an absolute pathname, we go
|
||
** for SccsPath (& only use the last component of the name
|
||
** passed) -- this is important for security reasons (if
|
||
** sccs is being used as a setuid front end), but not
|
||
** particularly intuitive.
|
||
**
|
||
** Parameters:
|
||
** name -- the file name to be munged.
|
||
**
|
||
** Returns:
|
||
** The pathname of the sccs file.
|
||
** NULL on error.
|
||
**
|
||
** Side Effects:
|
||
** none.
|
||
*/
|
||
|
||
char *
|
||
makefile(char *name)
|
||
{
|
||
char *p;
|
||
char buf[3*FBUFSIZ];
|
||
char *q;
|
||
|
||
p = rindex(name, '/');
|
||
if (p == NULL)
|
||
p = name;
|
||
else
|
||
p++;
|
||
|
||
/*
|
||
** Check to see that the path is "safe", i.e., that we
|
||
** are not letting some nasty person use the setuid part
|
||
** of this program to look at or munge some presumably
|
||
** hidden files.
|
||
*/
|
||
|
||
if (SccsDir[0] == '/' && !safepath(name))
|
||
return (NULL);
|
||
|
||
/*
|
||
** Create the base pathname.
|
||
*/
|
||
|
||
/* first the directory part */
|
||
if (SccsDir[0] != '\0' && name[0] != '/' && strncmp(name, "./", 2) != 0)
|
||
{
|
||
gstrcpy(buf, SccsDir, sizeof(buf));
|
||
gstrcat(buf, "/", sizeof(buf));
|
||
}
|
||
else
|
||
gstrcpy(buf, "", sizeof(buf));
|
||
|
||
/* then the head of the pathname */
|
||
gstrncat(buf, name, p - name, sizeof(buf));
|
||
q = &buf[strlen(buf)];
|
||
|
||
/* now copy the final part of the name, in case useful */
|
||
gstrcpy(q, p, sizeof(buf));
|
||
|
||
/* so is it useful? */
|
||
if (strncmp(p, "s.", 2) != 0 && !isdir(buf))
|
||
{
|
||
/* sorry, no; copy the SCCS pathname & the "s." */
|
||
gstrcpy(q, SccsPath, sizeof(buf));
|
||
gstrcat(buf, "/s.", sizeof(buf));
|
||
|
||
/* and now the end of the name */
|
||
gstrcat(buf, p, sizeof(buf));
|
||
}
|
||
|
||
/* if i haven't changed it, why did I do all this? */
|
||
if (strcmp(buf, name) == 0)
|
||
p = name;
|
||
else
|
||
{
|
||
/* but if I have, squirrel it away */
|
||
p = malloc(strlen(buf) + 1);
|
||
if (p == NULL)
|
||
{
|
||
perror("Sccs: no mem");
|
||
exit(EX_OSERR);
|
||
}
|
||
strcpy(p, buf);
|
||
}
|
||
|
||
return (p);
|
||
}
|
||
|
||
/*
|
||
** ISDIR -- return true if the argument is a directory.
|
||
**
|
||
** Parameters:
|
||
** name -- the pathname of the file to check.
|
||
**
|
||
** Returns:
|
||
** TRUE if 'name' is a directory, FALSE otherwise.
|
||
**
|
||
** Side Effects:
|
||
** none.
|
||
*/
|
||
|
||
bool
|
||
isdir(char *name)
|
||
{
|
||
struct stat stbuf;
|
||
|
||
return (stat(name, &stbuf) >= 0 && (stbuf.st_mode & S_IFMT) == S_IFDIR);
|
||
}
|
||
|
||
/*
|
||
** SAFEPATH -- determine whether a pathname is "safe"
|
||
**
|
||
** "Safe" pathnames only allow you to get deeper into the
|
||
** directory structure, i.e., full pathnames and ".." are
|
||
** not allowed.
|
||
**
|
||
** Parameters:
|
||
** p -- the name to check.
|
||
**
|
||
** Returns:
|
||
** TRUE -- if the path is safe.
|
||
** FALSE -- if the path is not safe.
|
||
**
|
||
** Side Effects:
|
||
** Prints a message if the path is not safe.
|
||
*/
|
||
|
||
bool
|
||
safepath(char *p)
|
||
{
|
||
if (*p != '/')
|
||
{
|
||
while (strncmp(p, "../", 3) != 0 && strcmp(p, "..") != 0)
|
||
{
|
||
p = index(p, '/');
|
||
if (p == NULL)
|
||
return (TRUE);
|
||
p++;
|
||
}
|
||
}
|
||
|
||
printf("You may not use full pathnames or \"..\"\n");
|
||
return (FALSE);
|
||
}
|
||
|
||
/*
|
||
** CLEAN -- clean out recreatable files
|
||
**
|
||
** Any file for which an "s." file exists but no "p." file
|
||
** exists in the current directory is purged.
|
||
**
|
||
** Parameters:
|
||
** mode -- tells whether this came from a "clean", "info", or
|
||
** "check" command.
|
||
** argv -- the rest of the argument vector.
|
||
**
|
||
** Returns:
|
||
** exit value.
|
||
**
|
||
** Side Effects:
|
||
** Removes files in the current directory.
|
||
** Prints information regarding files being edited.
|
||
** Exits if a "check" command.
|
||
*/
|
||
|
||
int
|
||
clean(int mode, char **argv)
|
||
{
|
||
struct dirent *dir;
|
||
char buf[FBUFSIZ];
|
||
char *bufend;
|
||
DIR *dirp;
|
||
char *basefile;
|
||
bool gotedit;
|
||
bool gotpfent;
|
||
FILE *pfp;
|
||
bool nobranch = FALSE;
|
||
struct pfile *pf;
|
||
char **ap;
|
||
char *usernm = NULL;
|
||
char *subdir = NULL;
|
||
char *cmdname;
|
||
|
||
/*
|
||
** Process the argv
|
||
*/
|
||
|
||
cmdname = *argv;
|
||
for (ap = argv; *++ap != NULL; )
|
||
{
|
||
if (**ap == '-')
|
||
{
|
||
/* we have a flag */
|
||
switch ((*ap)[1])
|
||
{
|
||
case 'b':
|
||
nobranch = TRUE;
|
||
break;
|
||
|
||
case 'u':
|
||
if ((*ap)[2] != '\0')
|
||
usernm = &(*ap)[2];
|
||
else if (ap[1] != NULL && ap[1][0] != '-')
|
||
usernm = *++ap;
|
||
else
|
||
usernm = username();
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (subdir != NULL)
|
||
usrerr("too many args");
|
||
else
|
||
subdir = *ap;
|
||
}
|
||
}
|
||
|
||
/*
|
||
** Find and open the SCCS directory.
|
||
*/
|
||
|
||
gstrcpy(buf, SccsDir, sizeof(buf));
|
||
if (buf[0] != '\0')
|
||
gstrcat(buf, "/", sizeof(buf));
|
||
if (subdir != NULL)
|
||
{
|
||
gstrcat(buf, subdir, sizeof(buf));
|
||
gstrcat(buf, "/", sizeof(buf));
|
||
}
|
||
gstrcat(buf, SccsPath, sizeof(buf));
|
||
bufend = &buf[strlen(buf)];
|
||
|
||
dirp = opendir(buf);
|
||
if (dirp == NULL)
|
||
{
|
||
usrerr("cannot open %s", buf);
|
||
return (EX_NOINPUT);
|
||
}
|
||
|
||
/*
|
||
** Scan the SCCS directory looking for s. files.
|
||
** gotedit tells whether we have tried to clean any
|
||
** files that are being edited.
|
||
*/
|
||
|
||
gotedit = FALSE;
|
||
while ((dir = readdir(dirp)) != NULL) {
|
||
if (strncmp(dir->d_name, "s.", 2) != 0)
|
||
continue;
|
||
|
||
/* got an s. file -- see if the p. file exists */
|
||
gstrcpy(bufend, "/p.", sizeof(buf));
|
||
basefile = bufend + 3;
|
||
gstrcpy(basefile, &dir->d_name[2], sizeof(buf));
|
||
|
||
/*
|
||
** open and scan the p-file.
|
||
** 'gotpfent' tells if we have found a valid p-file
|
||
** entry.
|
||
*/
|
||
|
||
pfp = fopen(buf, "r");
|
||
gotpfent = FALSE;
|
||
if (pfp != NULL)
|
||
{
|
||
/* the file exists -- report it's contents */
|
||
while ((pf = getpfent(pfp)) != NULL)
|
||
{
|
||
if (nobranch && isbranch(pf->p_nsid))
|
||
continue;
|
||
if (usernm != NULL && strcmp(usernm, pf->p_user) != 0 && mode != CLEANC)
|
||
continue;
|
||
gotedit = TRUE;
|
||
gotpfent = TRUE;
|
||
if (mode == TELLC)
|
||
{
|
||
printf("%s\n", basefile);
|
||
break;
|
||
}
|
||
printf("%12s: being edited: ", basefile);
|
||
putpfent(pf, stdout);
|
||
}
|
||
fclose(pfp);
|
||
}
|
||
|
||
/* the s. file exists and no p. file exists -- unlink the g-file */
|
||
if (mode == CLEANC && !gotpfent)
|
||
{
|
||
char unlinkbuf[FBUFSIZ];
|
||
gstrcpy(unlinkbuf, &dir->d_name[2], sizeof(unlinkbuf));
|
||
unlink(unlinkbuf);
|
||
}
|
||
}
|
||
|
||
/* cleanup & report results */
|
||
closedir(dirp);
|
||
if (!gotedit && mode == INFOC)
|
||
{
|
||
printf("Nothing being edited");
|
||
if (nobranch)
|
||
printf(" (on trunk)");
|
||
if (usernm == NULL)
|
||
printf("\n");
|
||
else
|
||
printf(" by %s\n", usernm);
|
||
}
|
||
if (mode == CHECKC)
|
||
exit(gotedit);
|
||
return (EX_OK);
|
||
}
|
||
|
||
/*
|
||
** ISBRANCH -- is the SID a branch?
|
||
**
|
||
** Parameters:
|
||
** sid -- the sid to check.
|
||
**
|
||
** Returns:
|
||
** TRUE if the sid represents a branch.
|
||
** FALSE otherwise.
|
||
**
|
||
** Side Effects:
|
||
** none.
|
||
*/
|
||
|
||
bool
|
||
isbranch(char *sid)
|
||
{
|
||
char *p;
|
||
int dots;
|
||
|
||
dots = 0;
|
||
for (p = sid; *p != '\0'; p++)
|
||
{
|
||
if (*p == '.')
|
||
dots++;
|
||
if (dots > 1)
|
||
return (TRUE);
|
||
}
|
||
return (FALSE);
|
||
}
|
||
|
||
/*
|
||
** UNEDIT -- unedit a file
|
||
**
|
||
** Checks to see that the current user is actually editting
|
||
** the file and arranges that s/he is not editting it.
|
||
**
|
||
** Parameters:
|
||
** fn -- the name of the file to be unedited.
|
||
**
|
||
** Returns:
|
||
** TRUE -- if the file was successfully unedited.
|
||
** FALSE -- if the file was not unedited for some
|
||
** reason.
|
||
**
|
||
** Side Effects:
|
||
** fn is removed
|
||
** entries are removed from pfile.
|
||
*/
|
||
|
||
bool
|
||
unedit(char *fn)
|
||
{
|
||
FILE *pfp;
|
||
char *cp, *pfn;
|
||
static char tfn[] = _PATH_TMP;
|
||
FILE *tfp;
|
||
char *q;
|
||
bool delete = FALSE;
|
||
bool others = FALSE;
|
||
char *myname;
|
||
struct pfile *pent;
|
||
char buf[PFILELG];
|
||
|
||
/* make "s." filename & find the trailing component */
|
||
pfn = makefile(fn);
|
||
if (pfn == NULL)
|
||
return (FALSE);
|
||
q = rindex(pfn, '/');
|
||
if (q == NULL)
|
||
q = &pfn[-1];
|
||
if (q[1] != 's' || q[2] != '.')
|
||
{
|
||
usrerr("bad file name \"%s\"", fn);
|
||
return (FALSE);
|
||
}
|
||
|
||
/* turn "s." into "p." & try to open it */
|
||
*++q = 'p';
|
||
|
||
pfp = fopen(pfn, "r");
|
||
if (pfp == NULL)
|
||
{
|
||
printf("%12s: not being edited\n", fn);
|
||
return (FALSE);
|
||
}
|
||
|
||
/* create temp file for editing p-file */
|
||
mktemp(tfn);
|
||
tfp = fopen(tfn, "w");
|
||
if (tfp == NULL)
|
||
{
|
||
usrerr("cannot create \"%s\"", tfn);
|
||
exit(EX_OSERR);
|
||
}
|
||
|
||
/* figure out who I am */
|
||
myname = username();
|
||
|
||
/*
|
||
** Copy p-file to temp file, doing deletions as needed.
|
||
*/
|
||
|
||
while ((pent = getpfent(pfp)) != NULL)
|
||
{
|
||
if (strcmp(pent->p_user, myname) == 0)
|
||
{
|
||
/* a match */
|
||
delete++;
|
||
}
|
||
else
|
||
{
|
||
/* output it again */
|
||
putpfent(pent, tfp);
|
||
others++;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Before changing anything, make sure we can remove
|
||
* the file in question (assuming it exists).
|
||
*/
|
||
if (delete) {
|
||
cp = tail(fn);
|
||
errno = 0;
|
||
if (access(cp, 0) < 0 && errno != ENOENT)
|
||
goto bad;
|
||
if (errno == 0)
|
||
/*
|
||
* This is wrong, but the rest of the program
|
||
* has built in assumptions about "." as well,
|
||
* so why make unedit a special case?
|
||
*/
|
||
if (access(".", 2) < 0) {
|
||
bad:
|
||
printf("%12s: can't remove\n", cp);
|
||
fclose(tfp);
|
||
fclose(pfp);
|
||
unlink(tfn);
|
||
return (FALSE);
|
||
}
|
||
}
|
||
/* do final cleanup */
|
||
if (others)
|
||
{
|
||
/* copy it back (perhaps it should be linked?) */
|
||
if (freopen(tfn, "r", tfp) == NULL)
|
||
{
|
||
syserr("cannot reopen \"%s\"", tfn);
|
||
exit(EX_OSERR);
|
||
}
|
||
if (freopen(pfn, "w", pfp) == NULL)
|
||
{
|
||
usrerr("cannot create \"%s\"", pfn);
|
||
return (FALSE);
|
||
}
|
||
while (fgets(buf, sizeof buf, tfp) != NULL)
|
||
fputs(buf, pfp);
|
||
}
|
||
else
|
||
{
|
||
/* it's empty -- remove it */
|
||
unlink(pfn);
|
||
}
|
||
fclose(tfp);
|
||
fclose(pfp);
|
||
unlink(tfn);
|
||
|
||
/* actually remove the g-file */
|
||
if (delete)
|
||
{
|
||
/*
|
||
* Since we've checked above, we can
|
||
* use the return from unlink to
|
||
* determine if the file existed or not.
|
||
*/
|
||
if (unlink(cp) >= 0)
|
||
printf("%12s: removed\n", cp);
|
||
return (TRUE);
|
||
}
|
||
else
|
||
{
|
||
printf("%12s: not being edited by you\n", fn);
|
||
return (FALSE);
|
||
}
|
||
}
|
||
|
||
/*
|
||
** DODIFF -- diff an s-file against a g-file
|
||
**
|
||
** Parameters:
|
||
** getv -- argv for the 'get' command.
|
||
** gfile -- name of the g-file to diff against.
|
||
**
|
||
** Returns:
|
||
** Result of get.
|
||
**
|
||
** Side Effects:
|
||
** none.
|
||
*/
|
||
|
||
int
|
||
dodiff(char **getv, char *gfile)
|
||
{
|
||
int pipev[2];
|
||
int rval;
|
||
int i;
|
||
int pid;
|
||
auto int st;
|
||
sig_t osig;
|
||
|
||
printf("\n------- %s -------\n", gfile);
|
||
fflush(stdout);
|
||
|
||
/* create context for diff to run in */
|
||
if (pipe(pipev) < 0)
|
||
{
|
||
syserr("dodiff: pipe failed");
|
||
exit(EX_OSERR);
|
||
}
|
||
if ((pid = fork()) < 0)
|
||
{
|
||
syserr("dodiff: fork failed");
|
||
exit(EX_OSERR);
|
||
}
|
||
else if (pid > 0)
|
||
{
|
||
/* in parent; run get */
|
||
OutFile = pipev[1];
|
||
close(pipev[0]);
|
||
rval = command(&getv[1], TRUE, "get:rcixt -s -k -p");
|
||
osig = signal(SIGINT, SIG_IGN);
|
||
while (((i = wait(&st)) >= 0 && i != pid) || errno == EINTR)
|
||
errno = 0;
|
||
signal(SIGINT, osig);
|
||
/* ignore result of diff */
|
||
}
|
||
else
|
||
{
|
||
/* in child, run diff */
|
||
if (close(pipev[1]) < 0 || close(0) < 0 ||
|
||
dup(pipev[0]) != 0 || close(pipev[0]) < 0)
|
||
{
|
||
syserr("dodiff: magic failed");
|
||
exit(EX_OSERR);
|
||
}
|
||
command(&getv[1], FALSE, "-diff:elsfhbC");
|
||
}
|
||
return (rval);
|
||
}
|
||
|
||
/*
|
||
** TAIL -- return tail of filename.
|
||
**
|
||
** Parameters:
|
||
** fn -- the filename.
|
||
**
|
||
** Returns:
|
||
** a pointer to the tail of the filename; e.g., given
|
||
** "cmd/ls.c", "ls.c" is returned.
|
||
**
|
||
** Side Effects:
|
||
** none.
|
||
*/
|
||
|
||
char *
|
||
tail(char *fn)
|
||
{
|
||
char *p;
|
||
|
||
for (p = fn; *p != 0; p++)
|
||
if (*p == '/' && p[1] != '\0' && p[1] != '/')
|
||
fn = &p[1];
|
||
return (fn);
|
||
}
|
||
|
||
/*
|
||
** GETPFENT -- get an entry from the p-file
|
||
**
|
||
** Parameters:
|
||
** pfp -- p-file file pointer
|
||
**
|
||
** Returns:
|
||
** pointer to p-file struct for next entry
|
||
** NULL on EOF or error
|
||
**
|
||
** Side Effects:
|
||
** Each call wipes out results of previous call.
|
||
*/
|
||
|
||
struct pfile *
|
||
getpfent(FILE *pfp)
|
||
{
|
||
static struct pfile ent;
|
||
static char buf[PFILELG];
|
||
char *p;
|
||
|
||
if (fgets(buf, sizeof buf, pfp) == NULL)
|
||
return (NULL);
|
||
|
||
ent.p_osid = p = buf;
|
||
ent.p_nsid = p = nextfield(p);
|
||
ent.p_user = p = nextfield(p);
|
||
ent.p_date = p = nextfield(p);
|
||
ent.p_time = p = nextfield(p);
|
||
ent.p_aux = p = nextfield(p);
|
||
|
||
return (&ent);
|
||
}
|
||
|
||
|
||
char *
|
||
nextfield(char *p)
|
||
{
|
||
if (p == NULL || *p == '\0')
|
||
return (NULL);
|
||
while (*p != ' ' && *p != '\n' && *p != '\0')
|
||
p++;
|
||
if (*p == '\n' || *p == '\0')
|
||
{
|
||
*p = '\0';
|
||
return (NULL);
|
||
}
|
||
*p++ = '\0';
|
||
return (p);
|
||
}
|
||
/*
|
||
** PUTPFENT -- output a p-file entry to a file
|
||
**
|
||
** Parameters:
|
||
** pf -- the p-file entry
|
||
** f -- the file to put it on.
|
||
**
|
||
** Returns:
|
||
** none.
|
||
**
|
||
** Side Effects:
|
||
** pf is written onto file f.
|
||
*/
|
||
|
||
void
|
||
putpfent(struct pfile *pf, FILE *f)
|
||
{
|
||
fprintf(f, "%s %s %s %s %s", pf->p_osid, pf->p_nsid,
|
||
pf->p_user, pf->p_date, pf->p_time);
|
||
if (pf->p_aux != NULL)
|
||
fprintf(f, " %s", pf->p_aux);
|
||
else
|
||
fprintf(f, "\n");
|
||
}
|
||
|
||
/*
|
||
** USRERR -- issue user-level error
|
||
**
|
||
** Parameters:
|
||
** f -- format string.
|
||
** ... -- parameters to a printf.
|
||
**
|
||
** Returns:
|
||
** -1
|
||
**
|
||
** Side Effects:
|
||
** none.
|
||
*/
|
||
|
||
int
|
||
usrerr(const char *f, ...)
|
||
{
|
||
va_list ap;
|
||
|
||
va_start(ap, f);
|
||
fprintf(stderr, "\n%s: ", MyName);
|
||
vfprintf(stderr, f, ap);
|
||
fprintf(stderr, "\n");
|
||
|
||
return (-1);
|
||
}
|
||
|
||
/*
|
||
** SYSERR -- print system-generated error.
|
||
**
|
||
** Parameters:
|
||
** f -- format string to a printf.
|
||
** ... - parameters to f.
|
||
**
|
||
** Returns:
|
||
** never.
|
||
**
|
||
** Side Effects:
|
||
** none.
|
||
*/
|
||
|
||
void
|
||
syserr(const char *f, ...)
|
||
{
|
||
va_list ap;
|
||
|
||
va_start(ap, f);
|
||
fprintf(stderr, "\n%s SYSERR: ", MyName);
|
||
vfprintf(stderr, f, ap);
|
||
fprintf(stderr, "\n");
|
||
if (errno == 0)
|
||
exit(EX_SOFTWARE);
|
||
else
|
||
{
|
||
perror(NULL);
|
||
exit(EX_OSERR);
|
||
}
|
||
}
|
||
/*
|
||
** USERNAME -- return name of the current user
|
||
**
|
||
** Parameters:
|
||
** none
|
||
**
|
||
** Returns:
|
||
** name of current user
|
||
**
|
||
** Side Effects:
|
||
** none
|
||
*/
|
||
|
||
char *
|
||
username(void)
|
||
{
|
||
# ifdef UIDUSER
|
||
struct passwd *pw;
|
||
|
||
pw = getpwuid(getuid());
|
||
if (pw == NULL)
|
||
{
|
||
syserr("who are you? (uid=%d)", getuid());
|
||
exit(EX_OSERR);
|
||
}
|
||
return (pw->pw_name);
|
||
# else
|
||
char *p;
|
||
|
||
p = getenv("USER");
|
||
if (p == NULL || p[0] == '\0')
|
||
p = getlogin();
|
||
return (p);
|
||
# endif /* UIDUSER */
|
||
}
|
||
|
||
/*
|
||
** Guarded string manipulation routines; the last argument
|
||
** is the length of the buffer into which the strcpy or strcat
|
||
** is to be done.
|
||
*/
|
||
char *
|
||
gstrcat(char *to, const char *from, size_t length)
|
||
{
|
||
if (strlen(from) + strlen(to) >= length) {
|
||
gstrbotch(to, from);
|
||
}
|
||
return(strcat(to, from));
|
||
}
|
||
|
||
char *
|
||
gstrncat(char *to, const char *from, size_t n, size_t length)
|
||
{
|
||
if (n + strlen(to) >= length) {
|
||
gstrbotch(to, from);
|
||
}
|
||
return(strncat(to, from, n));
|
||
}
|
||
|
||
char *
|
||
gstrcpy(char *to, const char *from, size_t length)
|
||
{
|
||
if (strlen(from) >= length) {
|
||
gstrbotch(from, (char *)0);
|
||
}
|
||
return(strcpy(to, from));
|
||
}
|
||
|
||
void
|
||
gstrbotch(const char *str1, const char *str2)
|
||
{
|
||
usrerr("Filename(s) too long: %s %s", str1, str2);
|
||
}
|