ref: 02c6058f5d529e41afb0208c69f0cbf694b02b18
dir: /sys/src/cmd/vac/unvac.c/
#include "stdinc.h"
#include <fcall.h> /* dirmodefmt */
#include "vac.h"
#pragma varargck type "t" ulong
VacFs *fs;
int tostdout;
int diff;
int nwant;
char **want;
int *found;
int chatty;
VtConn *conn;
int errors;
int settimes;
int table;
int mtimefmt(Fmt*);
void unvac(VacFile*, char*, VacDir*);
void
usage(void)
{
fprint(2, "usage: unvac [-TVcdtv] [-h host] file.vac [file ...]\n");
threadexitsall("usage");
}
struct
{
vlong data;
vlong skipdata;
} stats;
void
threadmain(int argc, char *argv[])
{
int i, printstats;
char *host;
VacFile *f;
fmtinstall('H', encodefmt);
fmtinstall('V', vtscorefmt);
fmtinstall('F', vtfcallfmt);
fmtinstall('t', mtimefmt);
fmtinstall('M', dirmodefmt);
host = nil;
printstats = 0;
ARGBEGIN{
case 'T':
settimes = 1;
break;
case 'V':
chattyventi = 1;
break;
case 'c':
tostdout++;
break;
case 'd':
diff++;
break;
case 'h':
host = EARGF(usage());
break;
case 's':
printstats++;
break;
case 't':
table++;
break;
case 'v':
chatty++;
break;
default:
usage();
}ARGEND
if(argc < 1)
usage();
if(tostdout && diff){
fprint(2, "cannot use -c with -d\n");
usage();
}
conn = vtdial(host);
if(conn == nil)
sysfatal("could not connect to server: %r");
if(vtconnect(conn) < 0)
sysfatal("vtconnect: %r");
fs = vacfsopen(conn, argv[0], VtOREAD, 128);
if(fs == nil)
sysfatal("vacfsopen: %r");
nwant = argc-1;
want = argv+1;
found = vtmallocz(nwant*sizeof found[0]);
if((f = vacfsgetroot(fs)) == nil)
sysfatal("vacfsgetroot: %r");
unvac(f, nil, nil);
for(i=0; i<nwant; i++){
if(want[i] && !found[i]){
fprint(2, "warning: didn't find %s\n", want[i]);
errors++;
}
}
if(errors)
threadexitsall("errors");
if(printstats)
fprint(2, "%lld bytes read, %lld bytes skipped\n",
stats.data, stats.skipdata);
threadexitsall(0);
}
int
writen(int fd, char *buf, int n)
{
int m;
int oldn;
oldn = n;
while(n > 0){
m = write(fd, buf, n);
if(m <= 0)
return -1;
buf += m;
n -= m;
}
return oldn;
}
int
wantfile(char *name)
{
int i, namelen, n;
if(nwant == 0)
return 1;
namelen = strlen(name);
for(i=0; i<nwant; i++){
if(want[i] == nil)
continue;
n = strlen(want[i]);
if(n < namelen && name[n] == '/' && memcmp(name, want[i], n) == 0)
return 1;
if(namelen < n && want[i][namelen] == '/' && memcmp(want[i], name, namelen) == 0)
return 1;
if(n == namelen && memcmp(name, want[i], n) == 0){
found[i] = 1;
return 1;
}
}
return 0;
}
void
unvac(VacFile *f, char *name, VacDir *vdir)
{
static char buf[65536];
int fd, n, m, bsize;
ulong mode, mode9;
char *newname;
char *what;
vlong off;
Dir d, *dp;
VacDirEnum *vde;
VacDir newvdir;
VacFile *newf;
if(vdir)
mode = vdir->mode;
else
mode = vacfilegetmode(f);
if(vdir){
if(table){
if(chatty){
mode9 = vdir->mode&0777;
if(mode&ModeDir)
mode9 |= DMDIR;
if(mode&ModeAppend)
mode9 |= DMAPPEND;
if(mode&ModeExclusive)
mode9 |= DMEXCL;
print("%M %-10s %-10s %11lld %t %s\n",
mode9, vdir->uid, vdir->gid, vdir->size,
vdir->mtime, name);
}else
print("%s%s\n", name, (mode&ModeDir) ? "/" : "");
}
else if(chatty)
fprint(2, "%s%s\n", name, (mode&ModeDir) ? "/" : "");
}
if(mode&(ModeDevice|ModeLink|ModeNamedPipe|ModeExclusive)){
if(table)
return;
if(mode&ModeDevice)
what = "device";
else if(mode&ModeLink)
what = "link";
else if(mode&ModeNamedPipe)
what = "named pipe";
else if(mode&ModeExclusive)
what = "lock";
else
what = "unknown type of file";
fprint(2, "warning: ignoring %s %s\n", what, name);
return;
}
if(mode&ModeDir){
if((vde = vdeopen(f)) == nil){
fprint(2, "vdeopen %s: %r", name);
errors++;
return;
}
if(!table && !tostdout && vdir){
// create directory
if((dp = dirstat(name)) == nil){
if((fd = create(name, OREAD, DMDIR|(mode&0777))) < 0){
fprint(2, "mkdir %s: %r\n", name);
vdeclose(vde);
}
close(fd);
}else{
if(!(dp->mode&DMDIR)){
fprint(2, "%s already exists and is not a directory\n", name);
errors++;
free(dp);
vdeclose(vde);
return;
}
free(dp);
}
}
while(vderead(vde, &newvdir) > 0){
if(name == nil)
newname = newvdir.elem;
else
newname = smprint("%s/%s", name, newvdir.elem);
if(wantfile(newname)){
if((newf = vacfilewalk(f, newvdir.elem)) == nil){
fprint(2, "walk %s: %r\n", name);
errors++;
}else if(newf == f){
fprint(2, "walk loop: %s\n", newname);
vacfiledecref(newf);
}else{
unvac(newf, newname, &newvdir);
vacfiledecref(newf);
}
}
if(newname != newvdir.elem)
free(newname);
vdcleanup(&newvdir);
}
vdeclose(vde);
}else{
if(!table){
off = 0;
if(tostdout)
fd = dup(1, -1);
else if(diff && (fd = open(name, ORDWR)) >= 0){
bsize = vacfiledsize(f);
while((n = readn(fd, buf, bsize)) > 0){
if(sha1matches(f, off/bsize, (uchar*)buf, n)){
off += n;
stats.skipdata += n;
continue;
}
seek(fd, off, 0);
if((m = vacfileread(f, buf, n, off)) < 0)
break;
if(writen(fd, buf, m) != m){
fprint(2, "write %s: %r\n", name);
goto Err;
}
off += m;
stats.data += m;
if(m < n){
nulldir(&d);
d.length = off;
if(dirfwstat(fd, &d) < 0){
fprint(2, "dirfwstat %s: %r\n", name);
goto Err;
}
break;
}
}
}
else if((fd = create(name, OWRITE, mode&0777)) < 0){
fprint(2, "create %s: %r\n", name);
errors++;
return;
}
while((n = vacfileread(f, buf, sizeof buf, off)) > 0){
if(writen(fd, buf, n) != n){
fprint(2, "write %s: %r\n", name);
Err:
errors++;
close(fd);
remove(name);
return;
}
off += n;
stats.data += n;
}
close(fd);
}
}
if(vdir && settimes && !tostdout){
nulldir(&d);
d.mtime = vdir->mtime;
if(dirwstat(name, &d) < 0)
fprint(2, "warning: setting mtime on %s: %r", name);
}
}
int
mtimefmt(Fmt *f)
{
Tm *tm;
tm = localtime(va_arg(f->args, ulong));
fmtprint(f, "%04d-%02d-%02d %02d:%02d",
tm->year+1900, tm->mon+1, tm->mday,
tm->hour, tm->min);
return 0;
}