diff options
| -rw-r--r-- | lib/libkvm/kvm.c | 7 | ||||
| -rw-r--r-- | lib/libkvm/kvm_geterr.3 | 11 |
2 files changed, 16 insertions, 2 deletions
diff --git a/lib/libkvm/kvm.c b/lib/libkvm/kvm.c index b814e8c..e731a29 100644 --- a/lib/libkvm/kvm.c +++ b/lib/libkvm/kvm.c @@ -76,9 +76,14 @@ static char sccsid[] = "@(#)kvm.c 8.2 (Berkeley) 2/13/94"; /* from src/lib/libc/gen/nlist.c */ int __fdnlist(int, struct nlist *); +static char _kd_is_null[] = ""; + char * kvm_geterr(kvm_t *kd) { + + if (kd == NULL) + return (_kd_is_null); return (kd->errbuf); } @@ -623,5 +628,5 @@ kvm_write(kvm_t *kd, u_long kva, const void *buf, size_t len) len -= cw; } - return (cp - (char *)buf); + return (cp - (const char *)buf); } diff --git a/lib/libkvm/kvm_geterr.3 b/lib/libkvm/kvm_geterr.3 index 3ce5c72..4aa9cc8 100644 --- a/lib/libkvm/kvm_geterr.3 +++ b/lib/libkvm/kvm_geterr.3 @@ -32,7 +32,7 @@ .\" @(#)kvm_geterr.3 8.1 (Berkeley) 6/4/93 .\" $FreeBSD$ .\" -.Dd June 4, 1993 +.Dd March 21, 2017 .Dt KVM_GETERR 3 .Os .Sh NAME @@ -54,6 +54,15 @@ library call did not produce an error. The string returned is stored in memory owned by .Xr kvm 3 so the message should be copied out and saved elsewhere if necessary. +.Sh RETURN VALUES +The function +.Fn kvm_geterr +will return "" if +.Fa kd +is +.Dv NULL +or an error has not been captured for +.Fa kd . .Sh SEE ALSO .Xr kvm 3 , .Xr kvm_close 3 , |
