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- #include <u.h>
- #include <libc.h>
- #include <String.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%q\n";
- vlong blocksize = 1024LL;
- void
- usage(void)
- {
- fprint(2, "usage: du [-afnqstu] [-b size] [file ...]\n");
- exits("usage");
- }
- void
- main(int argc, char *argv[])
- {
- int i;
- char *s, *ss;
- doquote = needsrcquote;
- quotefmtinstall();
- 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%q\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;
- default:
- usage();
- } 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;
- String *file;
- 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) {
- file = s_copy(name);
- s_append(file, "/");
- s_append(file, d->name);
- if(tflag) {
- t = d->mtime;
- if(uflag)
- t = d->atime;
- }
- if(qflag)
- t = d->qid.path;
- print(fmt, t, s_to_c(file));
- s_free(file);
- }
- continue;
- }
- if(strcmp(d->name, ".") == 0 ||
- strcmp(d->name, "..") == 0 ||
- seen(d))
- continue;
- file = s_copy(name);
- s_append(file, "/");
- s_append(file, d->name);
- t = du(s_to_c(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, s_to_c(file));
- s_free(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(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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