1.\" Copyright (c) 2020 Ryan Moeller <freqlabs@FreeBSD.org> 2.\" 3.\" Redistribution and use in source and binary forms, with or without 4.\" modification, are permitted provided that the following conditions 5.\" are met: 6.\" 1. Redistributions of source code must retain the above copyright 7.\" notice, this list of conditions and the following disclaimer. 8.\" 2. Redistributions in binary form must reproduce the above copyright 9.\" notice, this list of conditions and the following disclaimer in the 10.\" documentation and/or other materials provided with the distribution. 11.\" 12.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 13.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 15.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 16.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 17.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 18.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 19.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 20.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 21.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 22.\" SUCH DAMAGE. 23.\" 24.\" $FreeBSD$ 25.\" 26.Dd September 29, 2022 27.Dt CAP_NETDB 3 28.Os 29.Sh NAME 30.Nm cap_getprotobyname , 31.Nd "library for getting network proto entry in capability mode" 32.Sh LIBRARY 33.Lb libcap_netdb 34.Sh SYNOPSIS 35.In sys/nv.h 36.In libcasper.h 37.In casper/cap_netdb.h 38.Ft "struct protoent *" 39.Fn cap_getprotobyname "const cap_channel_t *chan" "const char *name" 40.Sh DESCRIPTION 41The function 42.Fn cap_getprotobyname 43is equivalent to 44.Xr getprotobyname 3 45except that the connection to the 46.Nm system.netdb 47service needs to be provided. 48.Sh EXAMPLES 49The following example first opens a capability to casper and then uses this 50capability to create the 51.Nm system.netdb 52casper service and uses it to look up a protocol by name. 53.Bd -literal 54cap_channel_t *capcas, *capnetdb; 55struct protoent *ent; 56 57/* Open capability to Casper. */ 58capcas = cap_init(); 59if (capcas == NULL) 60 err(1, "Unable to contact Casper"); 61 62/* Enter capability mode sandbox. */ 63if (caph_enter() < 0) 64 err(1, "Unable to enter capability mode"); 65 66/* Use Casper capability to create capability to the system.netdb service. */ 67capnetdb = cap_service_open(capcas, "system.netdb"); 68if (capnetdb == NULL) 69 err(1, "Unable to open system.netdb service"); 70 71/* Close Casper capability, we don't need it anymore. */ 72cap_close(capcas); 73 74ent = cap_getprotobyname(capnetdb, "http"); 75if (ent == NULL) 76 errx(1, "cap_getprotobyname failed to find http proto"); 77.Ed 78.Sh SEE ALSO 79.Xr cap_enter 2 , 80.Xr caph_enter 3 , 81.Xr err 3 , 82.Xr getprotobyname 3 , 83.Xr capsicum 4 , 84.Xr nv 9 85.Sh AUTHORS 86The 87.Nm cap_netdb 88service was implemented by 89.An Ryan Moeller Aq Mt freqlabs@FreeBSD.org . 90