ref: 00704e05d6393ac34959e24008d1f06be8920847
parent: 8a2251728f02f436b3f841f59f2086a4ecbea135
author: Sigrid Solveig Haflínudóttir <ftrvxmtrx@gmail.com>
date: Sun Dec 22 14:22:45 EST 2019
better errors
--- a/c9.c
+++ b/c9.c
@@ -138,11 +138,11 @@
if(tag != 0xffff){uint32_t d = tag / C9tagsbits, m = tag % C9tagsbits;
if(tag >= C9maxtags){- c->error("freetag: invalid tag");+ c->error("freetag: invalid tag %u", (uint32_t)tag);return -1;
}
if((c->tags[d] & 1<<m) != 0){- c->error("freetag: double free");+ c->error("freetag: double free for tag %u", (uint32_t)tag);return -1;
}
if(c->lowfreetag > tag)
@@ -158,12 +158,12 @@
uint8_t *p = NULL;
if(size > c->msize-4-1-2){- c->error("T: invalid size");+ c->error("T: invalid size %u", size);*err = C9Esize;
}else if((*err = newtag(c, type, tag)) == 0){size += 4+1+2;
if((p = c->begin(c, size)) == NULL){- c->error("T: no buffer");+ c->error("T: no buffer for %u bytes", size);freetag(c, *tag);
*err = C9Ebuf;
}else{@@ -183,7 +183,7 @@
C9error err;
if(msize < C9minmsize){- c->error("c9version: msize too small");+ c->error("c9version: msize too small: %u", msize);return C9Einit;
}
memset(c->tags, 0xff, sizeof(c->tags));
@@ -207,7 +207,7 @@
C9error err;
if(ulen > C9maxstr || alen > C9maxstr){- c->error("c9auth: string too long");+ c->error("c9auth: string too long: %u chars", ulen > alen ? ulen : alen);return C9Estr;
}
if((b = T(c, 4+2+ulen+2+alen, Tauth, tag, &err)) != NULL){@@ -248,7 +248,7 @@
C9error err;
if(ulen > C9maxstr || alen > C9maxstr){- c->error("c9attach: string too long");+ c->error("c9attach: string too long: %u chars", ulen > alen ? ulen : alen);return C9Estr;
}
if((b = T(c, 4+4+2+ulen+2+alen, Tattach, tag, &err)) != NULL){@@ -272,13 +272,13 @@
for(sz = i = 0; i < (int)sizeof(len)/sizeof(len[0]) && path[i] != NULL; i++){len[i] = safestrlen(path[i]);
if(len[i] == 0 || len[i] > C9maxstr){- c->error("c9walk: path element too long");+ c->error("c9walk: invalid path element: %u chars", len[i]);return C9Epath;
}
sz += 2 + len[i];
}
if(path[i] != NULL || i == 0){- c->error("c9walk: invalid elements !(0 < %d <= %d)", i, C9maxpathel);+ c->error("c9walk: invalid elements !(0 < %u <= %u)", i, C9maxpathel);return C9Epath;
}
@@ -315,7 +315,7 @@
C9error err;
if(nlen == 0 || nlen > C9maxstr){- c->error("c9create: invalid name");+ c->error("c9create: invalid name: %u chars", nlen);return C9Epath;
}
if((b = T(c, 4+2+nlen+4+1, Tcreate, tag, &err)) != NULL){@@ -413,11 +413,11 @@
C9error err;
if(nlen == 0 || nlen > C9maxstr){- c->error("c9wstat: invalid name");+ c->error("c9wstat: invalid name: %u chars", nlen);return C9Epath;
}
if(ulen > C9maxstr || glen > C9maxstr){- c->error("c9wstat: string too long");+ c->error("c9wstat: string too long: %u chars", ulen > glen ? ulen : glen);return C9Estr;
}
if((b = T(c, 4+2+2+statsz, Twstat, tag, &err)) != NULL){@@ -471,7 +471,7 @@
r.tag = r16(&b);
if(r.type != Rversion){ if(r.tag >= C9maxtags){- c->error("c9proc: invalid tag 0x%x", r.tag);+ c->error("c9proc: invalid tag %u", (uint32_t)r.tag);return C9Epkt;
}
if(freetag(c, r.tag) != 0)
@@ -500,7 +500,7 @@
if(sz < 2+13 || (cnt = r16(&b))*13 > sz-2)
goto error;
if(cnt > C9maxpathel){- c->error("c9proc: Rwalk !(%d <= %d)", cnt, C9maxpathel);+ c->error("c9proc: Rwalk !(%u <= %u)", cnt, C9maxpathel);return C9Epath;
}
for(i = 0; i < cnt; i++){@@ -514,10 +514,8 @@
case Rstat:
b += 2; sz -= 2;
- if((err = c9parsedir(c, &r.stat, &b, &sz)) != 0){- c->error("c9proc");+ if((err = c9parsedir(c, &r.stat, &b, &sz)) != 0)
return err;
- }
r.numqid = 1;
c->r(c, &r);
break;
@@ -585,7 +583,7 @@
}
return 0;
error:
- c->error("c9proc: invalid packet (type=%d)", r.type);+ c->error("c9proc: invalid packet type %u", r.type);return C9Epkt;
}
@@ -597,6 +595,7 @@
uint8_t *b;
uint32_t cnt, sz;
+ sz = 0;
if(*size < 49 || (sz = r16(t)) < 47 || *size < 2+sz)
goto error;
*size -= 2+sz;
@@ -624,7 +623,7 @@
*t += sz;
return 0;
error:
- c->error("c9parsedir: invalid size");+ c->error("c9parsedir: invalid size: size=%u sz=%u", *size, sz);return C9Epkt;
}
@@ -636,12 +635,12 @@
uint8_t *p = NULL;
if(size > c->msize-4-1-2){- c->error("R: invalid size");+ c->error("R: invalid size %u", size);*err = C9Esize;
}else{size += 4+1+2;
if((p = c->begin(c, size)) == NULL){- c->error("R: no buffer");+ c->error("R: no buffer for %u bytes", size);*err = C9Ebuf;
}else{*err = 0;
@@ -690,7 +689,7 @@
C9error err;
if(len > C9maxstr){- c->error("s9error: invalid ename");+ c->error("s9error: invalid ename: %u chars", len);return C9Estr;
}
if((b = R(c, 2+len, Rerror, tag, &err)) != NULL){@@ -735,7 +734,7 @@
for(n = 0; n < C9maxpathel && qids[n] != NULL; n++);
if(n > C9maxpathel){- c->error("s9walk: invalid elements !(0 <= %d <= %d)", n, C9maxpathel);+ c->error("s9walk: invalid elements !(0 <= %u <= %u)", n, C9maxpathel);return C9Epath;
}
@@ -831,11 +830,13 @@
mulen = safestrlen(s->muid);
if(nlen == 0 || nlen > C9maxstr){- c->error("s9readdir: invalid name");+ c->error("s9readdir: invalid name: %u chars", nlen);return C9Epath;
}
if(ulen > C9maxstr || glen > C9maxstr || mulen > C9maxstr){- c->error("s9readdir: string too long");+ ulen = ulen > glen ? ulen : glen;
+ ulen = ulen > mulen ? ulen : mulen;
+ c->error("s9readdir: string too long: %u chars", ulen);return C9Estr;
}
@@ -908,11 +909,13 @@
C9error err;
if(nlen == 0 || nlen > C9maxstr){- c->error("s9stat: invalid name");+ c->error("s9stat: invalid name: %u chars", nlen);return C9Epath;
}
if(ulen > C9maxstr || glen > C9maxstr || mulen > C9maxstr){- c->error("s9stat: string too long");+ ulen = ulen > glen ? ulen : glen;
+ ulen = ulen > mulen ? ulen : mulen;
+ c->error("s9stat: string too long: %u chars", ulen);return C9Estr;
}
@@ -982,7 +985,7 @@
sz -= 3;
if((c->svflags & Svver) == 0 && t.type != Tversion){- c->error("s9proc: expected Tversion, got %d", t.type);+ c->error("s9proc: expected Tversion, got %u", t.type);return C9Epkt;
}
@@ -1026,7 +1029,7 @@
t.fid = r32(&b);
t.walk.newfid = r32(&b);
if((n = r16(&b)) > 16){- c->error("s9proc: Twalk !(%d <= 16)", n);+ c->error("s9proc: Twalk !(%u <= 16)", n);return C9Epath;
}
sz -= 4+4+2;
@@ -1035,7 +1038,7 @@
if(sz < 2 || (cnt = r16(&b)) > sz-2)
goto error;
if(cnt < 1){- c->error("s9proc: Twalk invalid element [%d]", i);+ c->error("s9proc: Twalk invalid element [%u]", i);return C9Epath;
}
b[-2] = 0;
@@ -1160,7 +1163,7 @@
}
return 0;
error:
- c->error("s9proc: invalid packet (type=%d)", t.type);+ c->error("s9proc: invalid packet (type=%u)", t.type);return C9Epkt;
}
--- a/c9.h
+++ b/c9.h
@@ -290,7 +290,7 @@
void (*t)(C9ctx *ctx, C9t *t) __attribute__((nonnull(1, 2)));
/* Callback for error messages. */
- void (*error)(const char *fmt, ...) __attribute__((nonnull(1)));
+ void (*error)(const char *fmt, ...) __attribute__((nonnull(1), format(printf, 1, 2)));
/* Auxiliary data, can be used by any of above callbacks. */
struct C9aux *aux;