ref: 9ec1a07af2537e5485524c8d079a07abfee6f96d
dir: /sys/src/cmd/ls.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <fcall.h>
typedef struct NDir NDir;
struct NDir
{
Dir *d;
char *prefix;
};
int errs = 0;
int dflag;
int lflag;
int mflag;
int nflag;
int pflag;
int qflag;
int Qflag;
int rflag;
int sflag;
int tflag;
int Tflag;
int uflag;
int Fflag;
int ndirbuf;
int ndir;
NDir* dirbuf;
int ls(char*, int);
int compar(NDir*, NDir*);
char* asciitime(long);
char* darwx(long);
void rwx(long, char*);
void growto(long);
void dowidths(Dir*);
void format(Dir*, char*);
void output(void);
char* xcleanname(char*);
ulong clk;
int swidth; /* max width of -s size */
int qwidth; /* max width of -q version */
int vwidth; /* max width of dev */
int uwidth; /* max width of userid */
int mwidth; /* max width of muid */
int lwidth; /* max width of length */
int gwidth; /* max width of groupid */
Biobuf bin;
void
main(int argc, char *argv[])
{
int i;
Binit(&bin, 1, OWRITE);
ARGBEGIN{
case 'F': Fflag++; break;
case 'd': dflag++; break;
case 'l': lflag++; break;
case 'm': mflag++; break;
case 'n': nflag++; break;
case 'p': pflag++; break;
case 'q': qflag++; break;
case 'Q': Qflag++; break;
case 'r': rflag++; break;
case 's': sflag++; break;
case 't': tflag++; break;
case 'T': Tflag++; break;
case 'u': uflag++; break;
default: fprint(2, "usage: ls [-dlmnpqrstuFQT] [file ...]\n");
exits("usage");
}ARGEND
doquote = needsrcquote;
quotefmtinstall();
fmtinstall('M', dirmodefmt);
if(lflag)
clk = time(0);
if(argc == 0)
errs = ls(".", 0);
else for(i=0; i<argc; i++)
errs |= ls(argv[i], 1);
output();
exits(errs? "errors" : 0);
}
int
ls(char *s, int multi)
{
int fd;
long i, n;
char *p;
Dir *db;
db = dirstat(s);
if(db == nil){
error:
fprint(2, "ls: %s: %r\n", s);
return 1;
}
if((db->qid.type&QTDIR) && dflag==0){
free(db);
output();
fd = open(s, OREAD);
if(fd == -1)
goto error;
n = dirreadall(fd, &db);
if(n < 0)
goto error;
xcleanname(s);
growto(ndir+n);
for(i=0; i<n; i++){
dirbuf[ndir+i].d = db+i;
dirbuf[ndir+i].prefix = multi? s : 0;
}
ndir += n;
close(fd);
output();
}else{
growto(ndir+1);
dirbuf[ndir].d = db;
dirbuf[ndir].prefix = 0;
xcleanname(s);
p = utfrrune(s, '/');
if(p){
dirbuf[ndir].prefix = s;
*p = 0;
}
ndir++;
}
return 0;
}
void
output(void)
{
int i;
char buf[4096];
char *s;
if(!nflag)
qsort(dirbuf, ndir, sizeof dirbuf[0], (int (*)(void*, void*))compar);
for(i=0; i<ndir; i++)
dowidths(dirbuf[i].d);
for(i=0; i<ndir; i++) {
if(!pflag && (s = dirbuf[i].prefix)) {
if(strcmp(s, "/") ==0) /* / is a special case */
s = "";
sprint(buf, "%s/%s", s, dirbuf[i].d->name);
format(dirbuf[i].d, buf);
} else
format(dirbuf[i].d, dirbuf[i].d->name);
}
ndir = 0;
Bflush(&bin);
}
void
dowidths(Dir *db)
{
char buf[256];
int n;
if(sflag) {
n = sprint(buf, "%llud", (db->length+1023)/1024);
if(n > swidth)
swidth = n;
}
if(qflag) {
n = sprint(buf, "%lud", db->qid.vers);
if(n > qwidth)
qwidth = n;
}
if(mflag) {
n = snprint(buf, sizeof buf, "[%q]", db->muid);
if(n > mwidth)
mwidth = n;
}
if(lflag) {
n = sprint(buf, "%ud", db->dev);
if(n > vwidth)
vwidth = n;
n = sprint(buf, "%q", db->uid);
if(n > uwidth)
uwidth = n;
n = sprint(buf, "%q", db->gid);
if(n > gwidth)
gwidth = n;
n = sprint(buf, "%llud", db->length);
if(n > lwidth)
lwidth = n;
}
}
char*
fileflag(Dir *db)
{
if(Fflag == 0)
return "";
if(QTDIR & db->qid.type)
return "/";
if(0111 & db->mode)
return "*";
return "";
}
void
format(Dir *db, char *name)
{
int i;
if(sflag)
Bprint(&bin, "%*llud ",
swidth, (db->length+1023)/1024);
if(mflag){
Bprint(&bin, "[%q] ", db->muid);
for(i=2+strlen(db->muid); i<mwidth; i++)
Bprint(&bin, " ");
}
if(qflag)
Bprint(&bin, "(%.16llux %*lud %.2ux) ",
db->qid.path,
qwidth, db->qid.vers,
db->qid.type);
if(Tflag)
Bprint(&bin, "%c ", (db->mode&DMTMP)? 't': '-');
if(lflag)
Bprint(&bin, "%M %C %*ud %*q %*q %*llud %s ",
db->mode, db->type,
vwidth, db->dev,
-uwidth, db->uid,
-gwidth, db->gid,
lwidth, db->length,
asciitime(uflag? db->atime: db->mtime));
Bprint(&bin, Qflag? "%s%s\n": "%q%s\n", name, fileflag(db));
}
void
growto(long n)
{
if(n <= ndirbuf)
return;
ndirbuf = n;
dirbuf=(NDir *)realloc(dirbuf, ndirbuf*sizeof(NDir));
if(dirbuf == 0){
fprint(2, "ls: malloc fail\n");
exits("malloc fail");
}
}
int
compar(NDir *a, NDir *b)
{
long i;
Dir *ad, *bd;
ad = a->d;
bd = b->d;
if(tflag){
if(uflag)
i = bd->atime-ad->atime;
else
i = bd->mtime-ad->mtime;
}else{
if(a->prefix && b->prefix){
i = strcmp(a->prefix, b->prefix);
if(i == 0)
i = strcmp(ad->name, bd->name);
}else if(a->prefix){
i = strcmp(a->prefix, bd->name);
if(i == 0)
i = 1; /* a is longer than b */
}else if(b->prefix){
i = strcmp(ad->name, b->prefix);
if(i == 0)
i = -1; /* b is longer than a */
}else
i = strcmp(ad->name, bd->name);
}
if(i == 0)
i = (a<b? -1 : 1);
if(rflag)
i = -i;
return i;
}
char*
asciitime(long l)
{
static char buf[32];
char *t;
t = ctime(l);
/* 6 months in the past or a day in the future */
if(l<clk-180L*24*60*60 || clk+24L*60*60<l){
memmove(buf, t+4, 7); /* month and day */
memmove(buf+7, t+23, 5); /* year */
}else
memmove(buf, t+4, 12); /* skip day of week */
buf[12] = 0;
return buf;
}
/*
* Compress slashes, remove trailing slash. Don't worry about . and ..
*/
char*
xcleanname(char *name)
{
char *r, *w;
for(r=w=name; *r; r++){
if(*r=='/' && r>name && *(r-1)=='/')
continue;
if(w != r)
*w = *r;
w++;
}
*w = 0;
while(w-1>name && *(w-1)=='/')
*--w = 0;
return name;
}