BSD 2 development

[unix-history] / misc / ar.c

#define NARMAG  0177545
struct
{
       char    name[14];
       long    date;
       char    uid;
       char    gid;
       int     mode;
       long    size;
} arbuf;
struct
{
       char    minor;
       char    major;
       int     inumber;
       int     flags;
       char    nlinks;
       char    usrid;
       char    grpid;
       char    siz0;
       int     siz1;
       int     addr[8];
       long    adate;
       long    mdate;
} stbuf;

#define SKIP    1
#define IODD    2
#define OODD    4
#define HEAD    8

char    *man    { "mrxtdp" };
char    *opt    { "uvnbai" };

long    itol();
int     done();
int     rcmd();
int     dcmd();
int     xcmd();
int     tcmd();
int     pcmd();
int     mcmd();
int     (*comfun)();
char    flg[26];
char    **namv;
int     namc;
char    *arnam;
char    *ponam;
char    *tfnam;
char    *tf1nam;
char    *tf2nam;
char    *file;
char    name[16];
int     af;
int     tf;
int     tf1;
int     tf2;
int     bastate;
int     buf[256];

main(argc, argv)
char *argv[];
{
       register i;
       register char *cp;

       for(i=1; i<4; i++)
               if((signal(i, 1) & 1) == 0)
                       signal(i, done);
       if(argc < 3)
               usage();
       cp = argv[1];
       for(cp = argv[1]; *cp; cp++)
       switch(*cp) {
       case 'v':
       case 'u':
       case 'n':
       case 'a':
       case 'b':
       case 'i':
               flg[*cp - 'a']++;
               continue;

       case 'r':
               setcom(rcmd);
               continue;

       case 'd':
               setcom(dcmd);
               continue;

       case 'x':
               setcom(xcmd);
               continue;

       case 't':
               setcom(tcmd);
               continue;

       case 'p':
               setcom(pcmd);
               continue;

       case 'm':
               setcom(mcmd);
               continue;

       default:
               printf("bad option `%c'\n", *cp);
               done();
       }
       if(flg['i'-'a'])
               flg['b'-'a']++;
       if(flg['a'-'a'] || flg['b'-'a']) {
               bastate = 1;
               ponam = trim(argv[2]);
               argv++;
               argc--;
               if(argc < 3)
                       usage();
       }
       arnam = argv[2];
       namv = argv+3;
       namc = argc-3;
       if(comfun == 0) {
               if(flg['u'-'a'] == 0) {
                       printf("one of [%s] must be specified\n", man);
                       done();
               }
               setcom(rcmd);
       }
       (*comfun)();
       notfound();
       done();
}

setcom(fun)
int (*fun)();
{

       if(comfun != 0) {
               printf("only one of [%s] allowed\n", man);
               done();
       }
       comfun = fun;
}

rcmd()
{
       register f;

       init();
       if(getaf()) {
               printf("creating %s\n", arnam);
               cleanup();
               return;
       }
       while(!getdir()) {
               bamatch();
               if(namc == 0 || match()) {
                       f = stats();
                       if(f < 0) {
                               if(namc)
                                       printf("cannot open %s\n", file);
                               goto cp;
                       }
                       if(flg['u'-'a'])
                               if(stbuf.mdate <= arbuf.date) {
                                       close(f);
                                       goto cp;
                               }
                       mesg('r');
                       copyfil(af, -1, IODD+SKIP);
                       movefil(f);
                       continue;
               }
       cp:
               mesg('c');
               copyfil(af, tf, IODD+OODD+HEAD);
       }
       cleanup();
}

dcmd()
{

       init();
       if(getaf())
               noar();
       while(!getdir()) {
               if(match()) {
                       mesg('d');
                       copyfil(af, -1, IODD+SKIP);
                       continue;
               }
               mesg('c');
               copyfil(af, tf, IODD+OODD+HEAD);
       }
       install();
}

xcmd()
{
       register f;

       if(getaf())
               noar();
       while(!getdir()) {
               if(namc == 0 || match()) {
                       f = creat(file, arbuf.mode & 0777);
                       if(f < 0) {
                               printf("%s cannot create\n", file);
                               goto sk;
                       }
                       mesg('x');
                       copyfil(af, f, IODD);
                       close(f);
                       continue;
               }
       sk:
               mesg('c');
               copyfil(af, -1, IODD+SKIP);
       }
}

pcmd()
{

       if(getaf())
               noar();
       while(!getdir()) {
               if(namc == 0 || match()) {
                       if(flg['v'-'a'])
                               printf("<%s>\n", file);
                       copyfil(af, 1, IODD);
                       continue;
               }
               copyfil(af, -1, IODD+SKIP);
       }
}

mcmd()
{

       init();
       if(getaf())
               noar();
       tf2nam = mktemp("/tmp/v2XXXXX");
       close(creat(tf2nam, 0600));
       tf2 = open(tf2nam, 2);
       if(tf2 < 0) {
               printf("cannot create third temp\n");
               done();
       }
       while(!getdir()) {
               bamatch();
               if(match()) {
                       mesg('m');
                       copyfil(af, tf2, IODD+OODD+HEAD);
                       continue;
               }
               mesg('c');
               copyfil(af, tf, IODD+OODD+HEAD);
       }
       install();
}

tcmd()
{

       if(getaf())
               noar();
       while(!getdir()) {
               if(namc == 0 || match()) {
                       if(flg['v'-'a'])
                               longt();
                       printf("%s\n", trim(file));
               }
               copyfil(af, -1, IODD+SKIP);
       }
}

init()
{

       tfnam = mktemp("/tmp/vXXXXX");
       close(creat(tfnam, 0600));
       tf = open(tfnam, 2);
       if(tf < 0) {
               printf("cannot create temp file\n");
               done();
       }
       buf[0] = NARMAG;
       if(write(tf, buf, 2) != 2) {
               perror(tfnam);
               done();
       }
}

getaf()
{

       af = open(arnam, 0);
       if(af < 0)
               return(1);
       buf[0] = 0;
       read(af, buf, 2);
       if(buf[0] != NARMAG) {
               printf("%s not in archive format\n", arnam);
               done();
       }
       return(0);
}

usage()
{
       printf("usage: ar [%s][%s] archive files ...\n", opt, man);
       done();
}

noar()
{

       printf("%s does not exist\n", arnam);
       done();
}

done()
{

       if(tfnam)
               unlink(tfnam);
       if(tf1nam)
               unlink(tf1nam);
       if(tf2nam)
               unlink(tf2nam);
       exit();
}

notfound()
{
       register i;

       for(i=0; i<namc; i++)
               if(namv[i])
                       printf("%s not found\n", namv[i]);
}

cleanup()
{
       register i, f;

       for(i=0; i<namc; i++) {
               file = namv[i];
               if(file == 0)
                       continue;
               namv[i] = 0;
               mesg('a');
               f = stats();
               if(f < 0) {
                       printf("%s cannot open\n", file);
                       continue;
               }
               movefil(f);
       }
       install();
}

install()
{
       register i;

       for(i=1; i<4; i++)
               signal(i, 1);
       close(af);
       af = creat(arnam, 0644);
       if(af < 0) {
               printf("cannot create %s\n", arnam);
               done();
       }
       seek(tf, 0, 0);
       while((i = read(tf, buf, 512)) > 0)
               if(write(af, buf, i) != i) {
                       perror(arnam);
                       done();
               }
       if(tf2nam) {
               seek(tf2, 0, 0);
               while((i = read(tf2, buf, 512)) > 0)
                       if(write(af, buf, i) != i) {
                               perror(arnam);
                               done();
                       }
       }
       if(tf1nam) {
               seek(tf1, 0, 0);
               while((i = read(tf1, buf, 512)) > 0)
                       if(write(af, buf, i) != i) {
                               perror(arnam);
                               done();
                       }
       }
}

/*
* insert the file 'file'
* into the temporary file
*/
movefil(f)
{
       register char *cp;
       register i;

       cp = trim(file);
       for(i=0; i<14; i++)
               if(arbuf.name[i] = *cp)
                       cp++;
       arbuf.size = itol(stbuf.siz0&0377, stbuf.siz1);
       arbuf.date = stbuf.mdate;
       arbuf.uid = stbuf.usrid;
       arbuf.gid = stbuf.grpid;
       arbuf.mode = stbuf.flags;
       copyfil(f, tf, OODD+HEAD);
       close(f);
}

stats()
{
       register f;

       f = open(file, 0);
       if(f < 0)
               return(f);
       if(fstat(f, &stbuf) < 0) {
               close(f);
               return(-1);
       }
       return(f);
}

/*
* copy next file
* size given in arbuf
*/
copyfil(fi, fo, flag)
{
       register i, o;
       int pe;

       if((flag & HEAD) && fo >= 0)
               if(write(fo, &arbuf, sizeof arbuf) != sizeof arbuf) {
                       perror("write");
                       done();
               }
       pe = 0;
       while(arbuf.size > 0) {
               i = o = 512;
               if(arbuf.size < i) {
                       i = o = arbuf.size;
                       if(i&1) {
                               if(flag & IODD)
                                       i++;
                               if(flag & OODD)
                                       o++;
                       }
               }
               if(read(fi, buf, i) != i)
                       pe++;
               if((flag & SKIP) == 0)
                       if(write(fo, buf, o) != o && fo >= 0) {
                               perror("write");
                               done();
                       }
               arbuf.size =- 512;
       }
       if(pe)
               phserr();
}

getdir()
{
       register i;

       i = read(af, &arbuf, sizeof arbuf);
       if(i != sizeof arbuf) {
               if(tf1nam) {
                       i = tf;
                       tf = tf1;
                       tf1 = i;
               }
               return(1);
       }
       for(i=0; i<14; i++)
               name[i] = arbuf.name[i];
       file = name;
       return(0);
}

match()
{
       register i;

       for(i=0; i<namc; i++) {
               if(namv[i] == 0)
                       continue;
               if(equal(trim(namv[i]), file)) {
                       file = namv[i];
                       namv[i] = 0;
                       return(1);
               }
       }
       return(0);
}

bamatch()
{
       register f;

       switch(bastate) {

       case 1:
               if(!equal(file, ponam))
                       return;
               bastate = 2;
               if(flg['a'-'a'])
                       return;

       case 2:
               bastate = 0;
               tf1nam = mktemp("/tmp/v1XXXXX");
               close(creat(tf1nam, 0600));
               f = open(tf1nam, 2);
               if(f < 0) {
                       printf("cannot create second temp\n");
                       return;
               }
               tf1 = tf;
               tf = f;
       }
}

equal(s1, s2)
char *s1, *s2;
{
       register char *p1, *p2;

       p1 = s1;
       p2 = s2;
       while(*p1++ == *p2)
               if(*p2++ == 0)
                       return(1);
       return(0);
}

phserr()
{

       printf("phase error on %s\n", file);
}

mesg(c)
{

       if(flg['v'-'a'])
               if(c != 'c' || flg['v'-'a'] > 1)
                       printf("%c - %s\n", c, file);
}

trim(s)
char *s;
{
       register char *p1, *p2;

       for(p1 = s; *p1; p1++)
               ;
       while(p1 > s) {
               if(*--p1 != '/')
                       break;
               *p1 = 0;
       }
       p2 = s;
       for(p1 = s; *p1; p1++)
               if(*p1 == '/')
                       p2 = p1+1;
       return(p2);
}

#define IFMT    060000
#define ISARG   01000
#define LARGE   010000
#define SUID    04000
#define SGID    02000
#define ROWN    0400
#define WOWN    0200
#define XOWN    0100
#define RGRP    040
#define WGRP    020
#define XGRP    010
#define ROTH    04
#define WOTH    02
#define XOTH    01
#define STXT    01000

longt()
{
       register char *cp;
       register t;

       pmode();
       printf("%3d/%1d", arbuf.uid&0377, arbuf.gid&0377);
       printf("%6s", locv(arbuf.size));
       cp = ctime(&arbuf.date);
       printf(" %-12.12s %-4.4s ", cp+4, cp+20);
}

int     m1[] { 1, ROWN, 'r', '-' };
int     m2[] { 1, WOWN, 'w', '-' };
int     m3[] { 2, SUID, 's', XOWN, 'x', '-' };
int     m4[] { 1, RGRP, 'r', '-' };
int     m5[] { 1, WGRP, 'w', '-' };
int     m6[] { 2, SGID, 's', XGRP, 'x', '-' };
int     m7[] { 1, ROTH, 'r', '-' };
int     m8[] { 1, WOTH, 'w', '-' };
int     m9[] { 2, STXT, 't', XOTH, 'x', '-' };

int     *m[] { m1, m2, m3, m4, m5, m6, m7, m8, m9};

pmode()
{
       register int **mp;

       for (mp = &m[0]; mp < &m[9];)
               select(*mp++);
}

select(pairp)
int *pairp;
{
       register int n, *ap;

       ap = pairp;
       n = *ap++;
       while (--n>=0 && (arbuf.mode&*ap++)==0)
               ap++;
       putchar(*ap);
}