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- /*
- * Copyright (c) 1980 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1980 Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)sccs.c 5.11 (Berkeley) 3/4/91";
- #endif /* not lint */
-
- #include <sys/cdefs.h>
- #include <sys/param.h>
- #include <sys/stat.h>
- #include <sys/dir.h>
- #include <signal.h>
- #include <sysexits.h>
- #include <errno.h>
- #include <pwd.h>
- #include <stdio.h>
- #include "pathnames.h"
-
- /*
- ** SCCS.C -- human-oriented front end to the SCCS system.
- **
- ** Without trying to add any functionality to speak of, this
- ** program tries to make SCCS a little more accessible to human
- ** types. The main thing it does is automatically put the
- ** string "SCCS/s." on the front of names. Also, it has a
- ** couple of things that are designed to shorten frequent
- ** combinations, e.g., "delget" which expands to a "delta"
- ** and a "get".
- **
- ** This program can also function as a setuid front end.
- ** To do this, you should copy the source, renaming it to
- ** whatever you want, e.g., "syssccs". Change any defaults
- ** in the program (e.g., syssccs might default -d to
- ** "/usr/src/sys"). Then recompile and put the result
- ** as setuid to whomever you want. In this mode, sccs
- ** knows to not run setuid for certain programs in order
- ** to preserve security, and so forth.
- **
- ** Usage:
- ** sccs [flags] command [args]
- **
- ** Flags:
- ** -d<dir> <dir> represents a directory to search
- ** out of. It should be a full pathname
- ** for general usage. E.g., if <dir> is
- ** "/usr/src/sys", then a reference to the
- ** file "dev/bio.c" becomes a reference to
- ** "/usr/src/sys/dev/bio.c".
- ** -p<path> prepends <path> to the final component
- ** of the pathname. By default, this is
- ** "SCCS". For example, in the -d example
- ** above, the path then gets modified to
- ** "/usr/src/sys/dev/SCCS/s.bio.c". In
- ** more common usage (without the -d flag),
- ** "prog.c" would get modified to
- ** "SCCS/s.prog.c". In both cases, the
- ** "s." gets automatically prepended.
- ** -r run as the real user.
- **
- ** Commands:
- ** admin,
- ** get,
- ** delta,
- ** rmdel,
- ** cdc,
- ** etc. Straight out of SCCS; only difference
- ** is that pathnames get modified as
- ** described above.
- ** enter Front end doing "sccs admin -i<name> <name>"
- ** create Macro for "enter" followed by "get".
- ** edit Macro for "get -e".
- ** unedit Removes a file being edited, knowing
- ** about p-files, etc.
- ** delget Macro for "delta" followed by "get".
- ** deledit Macro for "delta" followed by "get -e".
- ** branch Macro for "get -b -e", followed by "delta
- ** -s -n", followd by "get -e -t -g".
- ** diffs "diff" the specified version of files
- ** and the checked-out version.
- ** print Macro for "prs -e" followed by "get -p -m".
- ** tell List what files are being edited.
- ** info Print information about files being edited.
- ** clean Remove all files that can be
- ** regenerated from SCCS files.
- ** check Like info, but return exit status, for
- ** use in makefiles.
- ** fix Remove a top delta & reedit, but save
- ** the previous changes in that delta.
- **
- ** Compilation Flags:
- ** UIDUSER -- determine who the user is by looking at the
- ** uid rather than the login name -- for machines
- ** where SCCS gets the user in this way.
- ** SCCSDIR -- if defined, forces the -d flag to take on
- ** this value. This is so that the setuid
- ** aspects of this program cannot be abused.
- ** This flag also disables the -p flag.
- ** SCCSPATH -- the default for the -p flag.
- ** MYNAME -- the title this program should print when it
- ** gives error messages.
- **
- ** Compilation Instructions:
- ** cc -O -n -s sccs.c
- ** The flags listed above can be -D defined to simplify
- ** recompilation for variant versions.
- **
- ** Author:
- ** Eric Allman, UCB/INGRES
- ** Copyright 1980 Regents of the University of California
- */
-
-
- /******************* Configuration Information ********************/
-
- # ifndef SCCSPATH
- # define SCCSPATH "SCCS" /* pathname in which to find s-files */
- # endif NOT SCCSPATH
-
- # ifndef MYNAME
- # define MYNAME "sccs" /* name used for printing errors */
- # endif NOT MYNAME
-
- /**************** End of Configuration Information ****************/
-
- typedef char bool;
- # define TRUE 1
- # define FALSE 0
-
- # define bitset(bit, word) ((bool) ((bit) & (word)))
-
- struct sccsprog
- {
- char *sccsname; /* name of SCCS routine */
- short sccsoper; /* opcode, see below */
- short sccsflags; /* flags, see below */
- char *sccspath; /* pathname of binary implementing */
- };
-
- /* values for sccsoper */
- # define PROG 0 /* call a program */
- # define CMACRO 1 /* command substitution macro */
- # define FIX 2 /* fix a delta */
- # define CLEAN 3 /* clean out recreatable files */
- # define UNEDIT 4 /* unedit a file */
- # define SHELL 5 /* call a shell file (like PROG) */
- # define DIFFS 6 /* diff between sccs & file out */
- # define DODIFF 7 /* internal call to diff program */
- # define ENTER 8 /* enter new files */
-
- /* bits for sccsflags */
- # define NO_SDOT 0001 /* no s. on front of args */
- # define REALUSER 0002 /* protected (e.g., admin) */
-
- /* modes for the "clean", "info", "check" ops */
- # define CLEANC 0 /* clean command */
- # define INFOC 1 /* info command */
- # define CHECKC 2 /* check command */
- # define TELLC 3 /* give list of files being edited */
-
- /*
- ** Description of commands known to this program.
- ** First argument puts the command into a class. Second arg is
- ** info regarding treatment of this command. Third arg is a
- ** list of flags this command accepts from macros, etc. Fourth
- ** arg is the pathname of the implementing program, or the
- ** macro definition, or the arg to a sub-algorithm.
- */
-
- struct sccsprog SccsProg[] = {
- "admin", PROG, REALUSER, _PATH_SCCSADMIN,
- "cdc", PROG, 0, _PATH_SCCSRMDEL,
- "comb", PROG, 0, _PATH_SCCSCOMB,
- "delta", PROG, 0, _PATH_SCCSDELTA,
- "get", PROG, 0, _PATH_SCCSGET,
- "help", PROG, NO_SDOT, _PATH_SCCSHELP,
- "prs", PROG, 0, _PATH_SCCSPRS,
- "prt", PROG, 0, _PATH_SCCSPRT,
- "rmdel", PROG, REALUSER, _PATH_SCCSRMDEL,
- "val", PROG, 0, _PATH_SCCSVAL,
- "what", PROG, NO_SDOT, _PATH_SCCSWHAT,
- "sccsdiff", SHELL, REALUSER, _PATH_SCCSDIFF,
- "edit", CMACRO, NO_SDOT, "get -e",
- "delget", CMACRO, NO_SDOT, "delta:mysrp/get:ixbeskcl -t",
- "deledit", CMACRO, NO_SDOT,
- "delta:mysrp -n/get:ixbskcl -e -t -g",
- "fix", FIX, NO_SDOT, NULL,
- "clean", CLEAN, REALUSER|NO_SDOT,
- (char *) CLEANC,
- "info", CLEAN, REALUSER|NO_SDOT,
- (char *) INFOC,
- "check", CLEAN, REALUSER|NO_SDOT,
- (char *) CHECKC,
- "tell", CLEAN, REALUSER|NO_SDOT,
- (char *) TELLC,
- "unedit", UNEDIT, NO_SDOT, NULL,
- "diffs", DIFFS, NO_SDOT|REALUSER,
- NULL,
- "-diff", DODIFF, NO_SDOT|REALUSER,
- _PATH_SCCSBDIFF,
- "print", CMACRO, 0, "prs -e/get -p -m -s",
- "branch", CMACRO, NO_SDOT,
- "get:ixrc -e -b/delta: -s -n -ybranch-place-holder/get:pl -e -t -g",
- "enter", ENTER, NO_SDOT, NULL,
- "create", CMACRO, NO_SDOT, "enter/get:ixbeskcl -t",
- NULL, -1, 0, NULL
- };
-
- /* one line from a p-file */
- struct pfile
- {
- char *p_osid; /* old SID */
- char *p_nsid; /* new SID */
- char *p_user; /* user who did edit */
- char *p_date; /* date of get */
- char *p_time; /* time of get */
- char *p_aux; /* extra info at end */
- };
-
- char *SccsPath = SCCSPATH; /* pathname of SCCS files */
- # ifdef SCCSDIR
- char *SccsDir = SCCSDIR; /* directory to begin search from */
- # else
- char *SccsDir = "";
- # endif
- char MyName[] = MYNAME; /* name used in messages */
- int OutFile = -1; /* override output file for commands */
- bool RealUser; /* if set, running as real user */
- # ifdef DEBUG
- bool Debug; /* turn on tracing */
- # endif
- # ifndef V6
- extern char *getenv();
- # endif V6
-
- extern char *sys_siglist[];
-
- char *gstrcat(), *strcat();
- char *gstrncat(), *strncat();
- char *gstrcpy(), *strcpy();
- #define FBUFSIZ BUFSIZ
- #define PFILELG 120
-
- main(argc, argv)
- int argc;
- char **argv;
- {
- register char *p;
- extern struct sccsprog *lookup();
- register int i;
- # ifndef V6
- # ifndef SCCSDIR
- register struct passwd *pw;
- extern struct passwd *getpwnam();
- char buf[FBUFSIZ];
-
- /* pull "SccsDir" out of the environment (possibly) */
- p = getenv("PROJECTDIR");
- if (p != NULL && p[0] != '\0')
- {
- if (p[0] == '/')
- 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));
- gstrcat(buf, "/src", sizeof(buf));
- if (access(buf, 0) < 0)
- {
- gstrcpy(buf, pw->pw_dir, sizeof(buf));
- gstrcat(buf, "/source", sizeof(buf));
- if (access(buf, 0) < 0)
- {
- usrerr("project %s has no source!", p);
- exit(EX_USAGE);
- }
- }
- SccsDir = buf;
- }
- }
- # endif SCCSDIR
- # endif V6
-
- /*
- ** Detect and decode flags intended for this program.
- */
-
- if (argc < 2)
- {
- fprintf(stderr, "Usage: %s [flags] command [flags]\n", MyName);
- exit(EX_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 = ".";
- }
-
- i = command(argv, FALSE, "");
- exit(i);
- }
-
- /*
- ** 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.
- */
-
- command(argv, forkflag, arg0)
- char **argv;
- bool forkflag;
- char *arg0;
- {
- register struct sccsprog *cmd;
- register char *p;
- char buf[FBUFSIZ];
- extern struct sccsprog *lookup();
- char *nav[1000];
- char **np;
- register char **ap;
- register int i;
- register char *q;
- extern bool unedit();
- int rval = 0;
- extern char *index();
- extern char *makefile();
- char *editchs;
- extern char *tail();
-
- # 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 */
- # ifndef V6
- execvp("diff", ap);
- # endif
- 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(name)
- char *name;
- {
- register 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.
- */
-
- callprog(progpath, flags, argv, forkflag)
- char *progpath;
- short flags;
- char **argv;
- bool forkflag;
- {
- register int i;
- register int wpid;
- auto int st;
- register int sigcode;
- register int coredumped;
- register char *sigmsg;
- auto 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(name)
- char *name;
- {
- register char *p;
- char buf[3*FBUFSIZ];
- extern char *malloc();
- extern char *rindex();
- extern bool safepath();
- extern bool isdir();
- register 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(name)
- 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(p)
- register char *p;
- {
- extern char *index();
-
- 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:
- ** none.
- **
- ** Side Effects:
- ** Removes files in the current directory.
- ** Prints information regarding files being edited.
- ** Exits if a "check" command.
- */
-
- clean(mode, argv)
- int mode;
- char **argv;
- {
- struct direct *dir;
- char buf[FBUFSIZ];
- char *bufend;
- register DIR *dirp;
- register char *basefile;
- bool gotedit;
- bool gotpfent;
- FILE *pfp;
- bool nobranch = FALSE;
- extern struct pfile *getpfent();
- register struct pfile *pf;
- register char **ap;
- extern char *username();
- 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)) {
- 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.
- */
-
- isbranch(sid)
- char *sid;
- {
- register 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(fn)
- char *fn;
- {
- register FILE *pfp;
- char *cp, *pfn;
- static char tfn[] = _PATH_TMP;
- FILE *tfp;
- register char *q;
- bool delete = FALSE;
- bool others = FALSE;
- char *myname;
- extern char *username();
- struct pfile *pent;
- extern struct pfile *getpfent();
- char buf[PFILELG];
- extern char *makefile(), *rindex(), *tail();
-
- /* 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) {
- extern int errno;
-
- 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.
- */
-
- dodiff(getv, gfile)
- char **getv;
- char *gfile;
- {
- int pipev[2];
- int rval;
- register int i;
- register int pid;
- auto int st;
- extern int errno;
- 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(fn)
- register char *fn;
- {
- register 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(pfp)
- FILE *pfp;
- {
- static struct pfile ent;
- static char buf[PFILELG];
- register char *p;
- extern char *nextfield();
-
- 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(p)
- register 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.
- */
-
- putpfent(pf, f)
- register struct pfile *pf;
- register 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.
- ** p1-p3 -- parameters to a printf.
- **
- ** Returns:
- ** -1
- **
- ** Side Effects:
- ** none.
- */
-
- /*VARARGS1*/
- usrerr(f, p1, p2, p3)
- char *f;
- {
- fprintf(stderr, "\n%s: ", MyName);
- fprintf(stderr, f, p1, p2, p3);
- fprintf(stderr, "\n");
-
- return (-1);
- }
-
- /*
- ** SYSERR -- print system-generated error.
- **
- ** Parameters:
- ** f -- format string to a printf.
- ** p1, p2, p3 -- parameters to f.
- **
- ** Returns:
- ** never.
- **
- ** Side Effects:
- ** none.
- */
-
- /*VARARGS1*/
- syserr(f, p1, p2, p3)
- char *f;
- {
- extern int errno;
-
- fprintf(stderr, "\n%s SYSERR: ", MyName);
- fprintf(stderr, f, p1, p2, p3);
- 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()
- {
- # ifdef UIDUSER
- extern struct passwd *getpwuid();
- register struct passwd *pw;
-
- pw = getpwuid(getuid());
- if (pw == NULL)
- {
- syserr("who are you? (uid=%d)", getuid());
- exit(EX_OSERR);
- }
- return (pw->pw_name);
- # else
- extern char *getlogin();
- register 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(to, from, length)
- char *to, *from;
- int length;
- {
- if (strlen(from) + strlen(to) >= length) {
- gstrbotch(to, from);
- }
- return(strcat(to, from));
- }
-
- char *gstrncat(to, from, n, length)
- char *to, *from;
- int n;
- int length;
- {
- if (n + strlen(to) >= length) {
- gstrbotch(to, from);
- }
- return(strncat(to, from, n));
- }
-
- char *gstrcpy(to, from, length)
- char *to, *from;
- int length;
- {
- if (strlen(from) >= length) {
- gstrbotch(from, (char *)0);
- }
- return(strcpy(to, from));
- }
- gstrbotch(str1, str2)
- char *str1, *str2;
- {
- usrerr("Filename(s) too long: %s %s", str1, str2);
- }
-