# include "../hdr/defines.h" # include "../hdr/had.h" SCCSID(@(#)rmchg 1.4); /* Program to remove a specified delta from an SCCS file, when invoked as 'rmdel', or to change the MRs and/or comments of a specified delta, when invoked as 'chghist'. (The program has two links to it, one called 'rmdel', the other 'chghist'.) The delta to be removed (or whose MRs and/or comments are to be changed) is specified via the r argument, in the form of an SID. If the delta is to be removed, it must be the most recent one in its branch in the delta tree (a so-called 'leaf' delta). For either function, the delta being processed must not have any 'delivered' MRs, and the user must have basically the same permissions as are required to make deltas. If a directory is given as an argument, each SCCS file within the directory will be processed as if it had been specifically named. If a name of '-' is given, the standard input will be read for a list of names of SCCS files to be processed. Non SCCS files are ignored. */ # define COPY 0 # define NOCOPY 1 struct sid sid; int num_files; char had[26]; char D_type; int D_serial; main(argc,argv) int argc; char *argv[]; { register int i; register char *p; char c; extern rmchg(); extern int Fcnt; /* Set flags for 'fatal' to issue message, call clean-up routine, and terminate processing. */ Fflags = FTLMSG | FTLCLN | FTLEXIT; for(i=1; i<argc; i++) if(argv[i][0] == '-' && (c = argv[i][1])) { p = &argv[i][2]; switch (c) { case 'r': if (!(*p)) fatal("r has no sid (rc11)"); chksid(sid_ab(p,&sid),&sid); break; default: fatal("unknown key letter (cm1)"); } if (had[c - 'a']++) fatal("key letter twice (cm2)"); argv[i] = 0; } else num_files++; if(num_files == 0) fatal("missing file arg (cm3)"); if (*(p = sname(argv[0])) == 'n') p++; if (equal(p,"rmdel")) D_type = 'R'; /* invoked as 'rmdel' */ else if (equal(p,"chghist")) D_type = 'D'; /* invoked as 'chghist' */ else fatal("bad invocation (rc10)"); setsig(); /* Change flags for 'fatal' so that it will return to this routine (main) instead of terminating processing. */ Fflags =& ~FTLEXIT; Fflags =| FTLJMP; /* Call 'rmchg' routine for each file argument. */ for (i=1; i<argc; i++) if (p = argv[i]) do_file(p,rmchg); exit(Fcnt ? 1 : 0); } /* Routine that actually causes processing of the delta. Processing on the file takes place on a temporary copy of the SCCS file (the x-file). The name of the x-file is the same as that of the s-file (SCCS file) with the 's.' replaced by 'x.'. At end of processing, the s-file is removed and the x-file is renamed with the name of the old s-file. This routine makes use of the z-file to lock out simultaneous updates to the SCCS file by more than one user. */ struct packet gpkt; /* see file s.h */ char line[BUFSIZ]; char *Mrs; char *Comments; int Domrs; USXALLOC(); /* defines alloc() and free() */ rmchg(file) char *file; { static int first_time 1; struct deltab dt; /* see file s.h */ struct stats stats; /* see file s.h */ extern char *Sflags[]; int n; char *p, *cp; int keep; extern char Pgmr[8]; int fowner, downer, user; if (setjmp(Fjmp)) /* set up to return here from 'fatal' */ return; /* and return to caller of rmchg */ if (!HADR) fatal("missing r (rc1)"); if (D_type == 'D' && first_time) { first_time = 0; dohist(file); } if (!exists(file)) fatal(sprintf(Error,"file %s does not exist (rc2)",file)); /* Lock out any other user who may be trying to process the same file. */ if (lockit(auxf(file,'z'),2,getpid())) fatal("cannot create lock file (cm4)"); sinit(&gpkt,file,1); /* initialize packet and open s-file */ /* Flag for 'putline' routine to tell it to open x-file and allow writing on it. */ gpkt.p_upd = 1; /* Save requested SID for later checking of permissions (by 'permiss'). */ move(&sid,&gpkt.p_reqsid,sizeof(gpkt.p_reqsid)); /* Now read-in delta table. The 'dodelt' routine will read the table and change the delta entry of the requested SID to be of type 'R' if this is being executed as 'rmdel'; otherwise, for 'chghist', only the MR and comments sections will be changed (by 'escdodelt', called by 'dodelt'). */ if (dodelt(&gpkt,&stats,&sid,D_type) == 0) fmterr(&gpkt); /* Get serial number of requested SID from delta table just processed. */ D_serial = sidtoser(&gpkt.p_reqsid,&gpkt); /* If SID has not been zeroed (by 'dodelt'), SID was not found in file. */ if (sid.s_rel != 0) fatal("nonexistent sid (rc3)"); /* Now check permissions. */ finduser(&gpkt); doflags(&gpkt); permiss(&gpkt); /* Check that user is either owner of file or directory, or is one who made the delta. */ fstat(fileno(gpkt.p_iop),&Statbuf); fowner = Statbuf.i_uid & 0377; copy(gpkt.p_file,line); /* temporary for dname() */ if (stat(dname(line),&Statbuf)) downer = -1; else downer = Statbuf.i_uid & 0377; user = getuid() & 0377; if (user != fowner || user != downer) if (!equal(Pgmr,logname())) fatal(sprintf(Error, "you are neither owner nor '%s' (rc4)",Pgmr)); /* For 'rmdel', check that delta being removed is a 'leaf' delta, and if ok, process the body. */ if (D_type == 'R') { for (n = maxser(&gpkt); n > D_serial; n--) { p = &gpkt.p_idel[n]; if (p->i_pred == D_serial) fatal("not a 'leaf' delta (rc5)"); } flushto(&gpkt,EUSERTXT,COPY); keep = YES; gpkt.p_chkeof = 1; /* set EOF is ok */ while ((p = getline(&gpkt)) != NULL) { if (*p++ == CTLCHAR) { cp = p++; NONBLANK(p); /* Convert serial number to binary. */ if (*(p = satoi(p,&n)) != '\n') fmterr(&gpkt); if (n == D_serial) { gpkt.p_wrttn = 1; if (*cp == INS) keep = NO; else keep = YES; } } else if (keep == NO) gpkt.p_wrttn = 1; } } else { /* This is for invocation as 'chghist'. Check MRs. */ if (Mrs) { if (!(p = Sflags[VALFLAG - 'a'])) fatal("MRs not allowed (rc6)"); if (*p && valmrs(&gpkt,p)) fatal("inavlid MRs (rc7)"); } else if (Sflags[VALFLAG - 'a']) fatal("MRs required (rc8)"); /* Indicate that EOF at this point is ok, and flush rest of s-file to x-file. */ gpkt.p_chkeof = 1; while (getline(&gpkt)) ; } flushline(&gpkt,0); /* Delete old s-file, change x-file name to s-file. */ rename(auxf(&gpkt,'x'),&gpkt); clean_up(); } escdodelt(pkt) struct packet *pkt; { extern int First_esc; char *p; extern long Timenow; if (D_type == 'D' && First_esc) { /* chghist, first time */ First_esc = 0; if (Mrs) putmrs(pkt); putline(pkt,sprintf(line,"%c%c ",CTLCHAR,COMMENTS)); putline(pkt,Comments); putline(pkt,"\n"); putline(pkt,sprintf(line,"%c%c ",CTLCHAR,COMMENTS)); putline(pkt,"*** CHANGED *** "); date_ba(&Timenow,line); /* get date and time */ putline(pkt,line); putline(pkt,sprintf(line," %s\n",logname())); } if (pkt->p_line[1] == MRNUM) { p = &pkt->p_line; while (*p) p++; if (*(p - 2) == DELIVER) fatal("delta specified has delivered MR (rc9)"); if (D_type == 'D') /* turn MRs into comments */ pkt->p_line[1] = COMMENTS; } } putmrs(pkt) struct packet *pkt; { register char **argv; char str[64]; extern char *Varg[]; for (argv = &Varg[VSTART]; *argv; argv++) putline(pkt,sprintf(str,"%c%c %s\n",CTLCHAR,MRNUM,*argv)); } clean_up() { xrm(&gpkt); if (gpkt.p_file[0]) unlockit(auxf(gpkt.p_file,'z'),getpid()); xfreeall(); }