ref: 22383ae54cfeb178b150dc9417b0d773cc72c434
parent: 2856dd8f8c8cf799212163fe79ba9752f1bcd797
author: Ori Bernstein <ori@eigenstate.org>
date: Sat Feb 8 13:07:50 EST 2020
fix symlinks
--- a/fs.c
+++ b/fs.c
@@ -7,13 +7,6 @@
#include "git.h"
-char *Eperm = "permission denied";
-char *Eexist = "does not exist";
-char *E2long = "path too long";
-char *Enodir = "not a directory";
-char *Erepo = "unable to read repo";
-char *Egreg = "wat";
-
enum {Qroot,
Qhead,
@@ -35,7 +28,6 @@
typedef struct Crumb Crumb;
typedef struct Cache Cache;
typedef struct Uqid Uqid;
-
struct Crumb {char *name;
Object *obj;
@@ -77,6 +69,14 @@
"ctl",
};
+#define Eperm "permission denied";
+#define Eexist "does not exist";
+#define E2long "path too long";
+#define Enodir "not a directory";
+#define Erepo "unable to read repo";
+#define Egreg "wat";
+#define Ebadobj "invalid object";
+
char gitdir[512];
char *username;
char *mtpt = "/mnt/git";
@@ -84,7 +84,7 @@
Cache uqidcache[512];
vlong nextqid = Qmax;
-static char* gitwalk1(Fid *fid, char *name, Qid *q);
+static Object* walklink(Gitaux *, char *, int, int, int*);
vlong
qpath(Crumb *p, int idx, vlong id, vlong t)
@@ -228,7 +228,7 @@
/* FIXME: walk to the appropriate submodule.. */
static Object*
-modrefobj(Dirent *e)
+emptydir(Dirent *e)
{Object *m;
@@ -248,24 +248,28 @@
static int
gtreegen(int i, Dir *d, void *p)
{- Object *o, *e;
+ Object *o, *l, *e;
Gitaux *aux;
Crumb *c;
+ int m;
aux = p;
c = crumb(aux, 0);
e = c->obj;
+ m = e->tree->ent[i].mode;
if(i >= e->tree->nent)
return -1;
- if((o = readobject(e->tree->ent[i].h)) == nil)
- if(e->tree->ent[i].modref)
- o = modrefobj(&e->tree->ent[i]);
- else
- die("could not read object %H: %r", e->tree->ent[i].h, e->hash);+ if(e->tree->ent[i].ismod)
+ o = emptydir(&e->tree->ent[i]);
+ else if((o = readobject(e->tree->ent[i].h)) == nil)
+ die("could not read object %H: %r", e->tree->ent[i].h, e->hash);+ if(e->tree->ent[i].islink)
+ if((l = walklink(aux, o->data, o->size, 0, &m)) != nil)
+ o = l;
d->qid.vers = 0;
d->qid.type = o->type == GTree ? QTDIR : 0;
d->qid.path = qpath(c, i, o->id, aux->qdir);
- d->mode = e->tree->ent[i].mode;
+ d->mode = m;
d->mode |= (o->type == GTree) ? 0755 : 0644;
d->atime = c->mtime;
d->mtime = c->mtime;
@@ -426,33 +430,52 @@
respond(r, nil);
}
-static char*
-walklink(Fid *fid, Qid *q, char *link, int nlink)
+static Object*
+walklink(Gitaux *aux, char *link, int nlink, int ndotdot, int *mode)
{- char *p, *e, *err, *path;
+ char *p, *e, *path;
+ Object *o, *n;
+ int i;
- err = nil;
path = emalloc(nlink + 1);
memcpy(path, link, nlink);
cleanname(path);
- popcrumb(fid->aux);
+
+ o = crumb(aux, ndotdot)->obj;
+ assert(o->type == GTree);
for(p = path; *p; p = e){+ n = nil;
e = p + strcspn(p, "/");
if(*e == '/')
*e++ = '\0';
- if((err = gitwalk1(fid, p, q)) != nil)
+ /*
+ * cleanname guarantees these show up at the start of the name,
+ * which allows trimming them from the end of the trail of crumbs
+ * instead of needing to keep track of full parentage.
+ */
+ if(strcmp(p, "..") == 0)
+ n = crumb(aux, ++ndotdot)->obj;
+ else if(o->type == GTree)
+ for(i = 0; i < o->tree->nent; i++)
+ if(strcmp(o->tree->ent[i].name, p) == 0){+ *mode = o->tree->ent[i].mode;
+ n = readobject(o->tree->ent[i].h);
+ break;
+ }
+ o = n;
+ if(o == nil)
break;
}
free(path);
- return err;
+ return o;
}
static char *
-objwalk1(Fid *fid, Qid *q, Object *o, Crumb *p, Crumb *c, char *name, vlong qdir)
+objwalk1(Qid *q, Object *o, Crumb *p, Crumb *c, char *name, vlong qdir, Gitaux *aux)
{- Object *w;
+ Object *w, *l;
char *e;
- int i;
+ int i, m;
w = nil;
e = nil;
@@ -463,18 +486,21 @@
for(i = 0; i < o->tree->nent; i++){if(strcmp(o->tree->ent[i].name, name) != 0)
continue;
+ m = o->tree->ent[i].mode;
w = readobject(o->tree->ent[i].h);
- if(!w && o->tree->ent[i].modref)
- w = modrefobj(&o->tree->ent[i]);
+ if(!w && o->tree->ent[i].ismod)
+ w = emptydir(&o->tree->ent[i]);
+ if(w && o->tree->ent[i].islink)
+ if((l = walklink(aux, w->data, w->size, 1, &m)) != nil)
+ w = l;
if(!w)
- die("could not read object for %s: %r", name);- if(o->tree->ent[i].mode == 0)
- return walklink(fid, q, w->data, w->size);
+ return Ebadobj;
q->type = (w->type == GTree) ? QTDIR : 0;
q->path = qpath(c, i, w->id, qdir);
- c->mode = o->tree->ent[i].mode;
- c->mode |= (w->type == GTree) ? 0755 : 0644;
+ c->mode = m;
+ c->mode |= (w->type == GTree) ? DMDIR|0755 : 0644;
c->obj = w;
+ break;
}
if(!w)
e = Eexist;
@@ -608,7 +634,7 @@
break;
case Qobject:
if(c->obj){- e = objwalk1(fid, q, o->obj, o, c, name, Qobject);
+ e = objwalk1(q, o->obj, o, c, name, Qobject, aux);
}else{if(hparse(&h, name) == -1)
return "invalid object name";
@@ -621,13 +647,13 @@
}
break;
case Qhead:
- e = objwalk1(fid, q, o->obj, o, c, name, Qhead);
+ e = objwalk1(q, o->obj, o, c, name, Qhead, aux);
break;
case Qcommit:
- e = objwalk1(fid, q, o->obj, o, c, name, Qcommit);
+ e = objwalk1(q, o->obj, o, c, name, Qcommit, aux);
break;
case Qcommittree:
- e = objwalk1(fid, q, o->obj, o, c, name, Qcommittree);
+ e = objwalk1(q, o->obj, o, c, name, Qcommittree, aux);
break;
case Qcommitparent:
case Qcommitmsg:
@@ -640,12 +666,6 @@
return Egreg;
}
- /*
- * if we get called recursively from
- * objwalk1, we realloc the crumb array;
- * get a valid crumb again.
- */
- c = crumb(aux, 0);
c->name = estrdup(name);
c->qid = *q;
fid->qid = *q;
--- a/git.h
+++ b/git.h
@@ -74,9 +74,10 @@
struct Dirent {char *name;
- int modref;
int mode;
Hash h;
+ char ismod;
+ char islink;
};
struct Object {--- a/pack.c
+++ b/pack.c
@@ -765,7 +765,10 @@
/* FIXME: symlinks and other BS */
if(m == 0160000){t->mode |= DMDIR;
- t->modref = 1;
+ t->ismod = 1;
+ }else if(m == 0120000){+ t->mode = 0;
+ t->islink = 1;
}
t->mode = m & 0777;
if(m & 0040000)
--- a/query.c
+++ b/query.c
@@ -35,7 +35,7 @@
p = d->tree->ent;
e = p + d->tree->nent;
for(; p != e; p++){- if(p->modref)
+ if(p->ismod)
continue;
if(p->mode & DMDIR)
showdir(p->h, p->name, m);