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 May 12, 2020 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 41.Bf -symbolic 42The function 43.Fn cap_getprotobyname 44is equivalent to 45.Xr getprotobyname 3 46except that the connection to the 47.Nm system.netdb 48service needs to be provided. 49.Sh EXAMPLES 50The following example first opens a capability to casper and then uses this 51capability to create the 52.Nm system.netdb 53casper service and uses it to look up a protocol by name. 54.Bd -literal 55cap_channel_t *capcas, *capnetdb; 56struct protoent *ent; 57 58/* Open capability to Casper. */ 59capcas = cap_init(); 60if (capcas == NULL) 61 err(1, "Unable to contact Casper"); 62 63/* Enter capability mode sandbox. */ 64if (caph_enter() < 0) 65 err(1, "Unable to enter capability mode"); 66 67/* Use Casper capability to create capability to the system.netdb service. */ 68capnetdb = cap_service_open(capcas, "system.netdb"); 69if (capnetdb == NULL) 70 err(1, "Unable to open system.netdb service"); 71 72/* Close Casper capability, we don't need it anymore. */ 73cap_close(capcas); 74 75ent = cap_getprotobyname(capnetdb, "http"); 76if (ent == NULL) 77 errx(1, "cap_getprotobyname failed to find http proto"); 78.Ed 79.Sh SEE ALSO 80.Xr cap_enter 2 , 81.Xr caph_enter 3 , 82.Xr err 3 , 83.Xr getprotobyname 3 , 84.Xr capsicum 4 , 85.Xr nv 9 86.Sh AUTHORS 87The 88.Nm cap_netdb 89service was implemented by 90.An Ryan Moeller Aq Mt freqlabs@FreeBSD.org . 91