diff options
| author | Jared Yanovich <jaredy@cvs.openbsd.org> | 2005-07-22 02:58:12 +0000 |
|---|---|---|
| committer | Jared Yanovich <jaredy@cvs.openbsd.org> | 2005-07-22 02:58:12 +0000 |
| commit | 042c51173f2184e11d843eaed3d7a7585d287e0b (patch) | |
| tree | 95dc8b5e2cc5b3694b3603142bad6553b6f01696 /lib/libc/gen | |
| parent | f4f3233728f0f47fc203fb6815b71784d9fb6800 (diff) | |
advocate error checking in examples; ok jmc
Diffstat (limited to 'lib/libc/gen')
| -rw-r--r-- | lib/libc/gen/sysctl.3 | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/lib/libc/gen/sysctl.3 b/lib/libc/gen/sysctl.3 index 5ed975f65d0..aafd9ae3d52 100644 --- a/lib/libc/gen/sysctl.3 +++ b/lib/libc/gen/sysctl.3 @@ -1,4 +1,4 @@ -.\" $OpenBSD: sysctl.3,v 1.141 2005/01/04 19:42:39 markus Exp $ +.\" $OpenBSD: sysctl.3,v 1.142 2005/07/22 02:58:11 jaredy Exp $ .\" .\" Copyright (c) 1993 .\" The Regents of the University of California. All rights reserved. @@ -142,7 +142,8 @@ size_t len; mib[0] = CTL_KERN; mib[1] = KERN_MAXPROC; len = sizeof(maxproc); -sysctl(mib, 2, &maxproc, &len, NULL, 0); +if (sysctl(mib, 2, &maxproc, &len, NULL, 0) == -1) + err(1, "sysctl"); .Ed .Pp To retrieve the standard search path for the system utilities: @@ -153,9 +154,12 @@ char *p; mib[0] = CTL_USER; mib[1] = USER_CS_PATH; -sysctl(mib, 2, NULL, &len, NULL, 0); -p = malloc(len); -sysctl(mib, 2, p, &len, NULL, 0); +if (sysctl(mib, 2, NULL, &len, NULL, 0) == -1) + err(1, "sysctl"); +if ((p = malloc(len)) == NULL) + err(1, NULL); +if (sysctl(mib, 2, p, &len, NULL, 0) == -1) + err(1, "sysctl"); .Ed .Ss CTL_DDB Integer information and settable variables are available for the |