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#include <u.h>
#include <libc.h>
extern vlong du(char*, Dir*);
extern vlong k(vlong);
extern void err(char*);
extern int warn(char*);
extern int seen(Dir*);
int aflag;
int fflag;
int nflag;
int sflag;
int tflag;
int uflag;
int qflag;
char *fmt = "%llud\t%s\n";
vlong blocksize = 1024LL;
void
main(int argc, char *argv[])
{
int i;
char *s, *ss;
ARGBEGIN {
case 'a': /* all files */
aflag = 1;
break;
case 's': /* only top level */
sflag = 1;
break;
case 'f': /* ignore errors */
fflag = 1;
break;
case 'n': /* all files, number of bytes */
aflag = 1;
nflag = 1;
break;
case 't': /* return modified/accessed time */
tflag = 1;
break;
case 'u': /* accessed time */
uflag = 1;
break;
case 'q': /* qid */
fmt = "%.16llux\t%s\n";
qflag = 1;
break;
case 'b': /* block size */
s = ARGF();
if(s) {
blocksize = strtoul(s, &ss, 0);
if(s == ss)
blocksize = 1;
if(*ss == 'k')
blocksize *= 1024;
}
break;
} ARGEND
if(argc==0)
print(fmt, du(".", dirstat(".")), ".");
else
for(i=0; i<argc; i++)
print(fmt, du(argv[i], dirstat(argv[i])), argv[i]);
exits(0);
}
vlong
du(char *name, Dir *dir)
{
int fd, i, n;
Dir *buf, *d;
char file[256];
vlong nk, t;
if(dir == nil)
return warn(name);
fd = open(name, OREAD);
if(fd < 0)
return warn(name);
if((dir->qid.type&QTDIR) == 0)
nk = k(dir->length);
else{
nk = 0;
while((n=dirread(fd, &buf)) > 0) {
d = buf;
for(i=0; i<n; i++, d++) {
if((d->qid.type&QTDIR) == 0) {
t = k(d->length);
nk += t;
if(aflag) {
sprint(file, "%s/%s", name, d->name);
if(tflag) {
t = d->mtime;
if(uflag)
t = d->atime;
}
if(qflag)
t = d->qid.path;
print(fmt, t, file);
}
continue;
}
if(strcmp(d->name, ".") == 0 ||
strcmp(d->name, "..") == 0 ||
seen(d))
continue;
sprint(file, "%s/%s", name, d->name);
t = du(file, d);
nk += t;
if(tflag) {
t = d->mtime;
if(uflag)
t = d->atime;
}
if(qflag)
t = d->qid.path;
if(!sflag)
print(fmt, t, file);
}
free(buf);
}
if(n < 0)
warn(name);
}
close(fd);
if(tflag) {
if(uflag)
return dir->atime;
return dir->mtime;
}
if(qflag)
return dir->qid.path;
return nk;
}
#define NCACHE 128 /* must be power of two */
typedef struct Cache Cache;
struct Cache
{
Dir* cache;
int n;
int max;
} cache[NCACHE];
int
seen(Dir *dir)
{
Dir *dp;
int i;
Cache *c;
c = &cache[dir->qid.path&(NCACHE-1)];
dp = c->cache;
for(i=0; i<c->n; i++, dp++)
if(dir->qid.path == dp->qid.path &&
dir->type == dp->type &&
dir->dev == dp->dev)
return 1;
if(c->n == c->max){
c->cache = realloc(c->cache, (c->max+=20)*sizeof(Dir));
if(c->cache == 0)
err("malloc failure");
}
c->cache[c->n++] = *dir;
return 0;
}
void
err(char *s)
{
fprint(2, "du: %s: %r\n", s);
exits(s);
}
int
warn(char *s)
{
if(fflag == 0)
fprint(2, "du: %s: %r\n", s);
return 0;
}
vlong
k(vlong n)
{
if(nflag)
return n;
n = (n+blocksize-1)/blocksize;
return n*blocksize/1024LL;
}
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