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Diffstat (limited to 'static/freebsd/man3/cap_netdb.3')
| -rw-r--r-- | static/freebsd/man3/cap_netdb.3 | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/static/freebsd/man3/cap_netdb.3 b/static/freebsd/man3/cap_netdb.3 new file mode 100644 index 00000000..1f587c20 --- /dev/null +++ b/static/freebsd/man3/cap_netdb.3 @@ -0,0 +1,91 @@ +.\" Copyright (c) 2020 Ryan Moeller <freqlabs@FreeBSD.org> +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.Dd December 6, 2023 +.Dt CAP_NETDB 3 +.Os +.Sh NAME +.Nm cap_getprotobyname , +.Nd "library for getting network proto entry in capability mode" +.Sh LIBRARY +.Lb libcap_netdb +.Sh SYNOPSIS +.In sys/nv.h +.In libcasper.h +.In casper/cap_netdb.h +.Ft "struct protoent *" +.Fn cap_getprotobyname "const cap_channel_t *chan" "const char *name" +.Sh DESCRIPTION +The function +.Fn cap_getprotobyname +is equivalent to +.Xr getprotobyname 3 +except that the connection to the +.Nm system.netdb +service needs to be provided. +It is reentrant but not thread-safe. +That is, it may be called from separate threads only with different +.Vt cap_channel_t +arguments or with synchronization. +.Sh EXAMPLES +The following example first opens a capability to casper and then uses this +capability to create the +.Nm system.netdb +casper service and uses it to look up a protocol by name. +.Bd -literal +cap_channel_t *capcas, *capnetdb; +struct protoent *ent; + +/* Open capability to Casper. */ +capcas = cap_init(); +if (capcas == NULL) + err(1, "Unable to contact Casper"); + +/* Enter capability mode sandbox. */ +if (caph_enter() < 0) + err(1, "Unable to enter capability mode"); + +/* Use Casper capability to create capability to the system.netdb service. */ +capnetdb = cap_service_open(capcas, "system.netdb"); +if (capnetdb == NULL) + err(1, "Unable to open system.netdb service"); + +/* Close Casper capability, we don't need it anymore. */ +cap_close(capcas); + +ent = cap_getprotobyname(capnetdb, "http"); +if (ent == NULL) + errx(1, "cap_getprotobyname failed to find http proto"); +.Ed +.Sh SEE ALSO +.Xr cap_enter 2 , +.Xr caph_enter 3 , +.Xr err 3 , +.Xr getprotobyname 3 , +.Xr capsicum 4 , +.Xr nv 9 +.Sh AUTHORS +The +.Nm cap_netdb +service was implemented by +.An Ryan Moeller Aq Mt freqlabs@FreeBSD.org . |