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$FreeBSD: releng/10.2/lib/libc/gen/cap_rights_get.3 280247 2015-03-19 11:24:07Z rwatson $
.Dd March 27, 2014 .Dt CAP_RIGHTS_GET 3 .Os .Sh NAME .Nm cap_rights_get .Nd obtain capability rights .Sh LIBRARY .Lb libc .Sh SYNOPSIS n sys/capsicum.h .Ft int .Fn cap_rights_get "int fd" "cap_rights_t *rights" .Sh DESCRIPTION The .Nm cap_rights_get function allows to obtain current capability rights for the given descriptor. The function will fill the .Fa rights argument with all capability rights if they were not limited or capability rights configured during the last successful call of .Xr cap_rights_limit 2 on the given descriptor.
p The .Fa rights argument can be inspected using .Xr cap_rights_init 3 family of functions.
p The complete list of the capability rights can be found in the .Xr rights 4 manual page. .Sh RETURN VALUES .Rv -std .Sh EXAMPLES The following example demonstrates how to limit file descriptor capability rights and how to obtain them. d -literal cap_rights_t setrights, getrights; int fd; memset(&setrights, 0, sizeof(setrights)); memset(&getrights, 0, sizeof(getrights)); fd = open("/tmp/foo", O_RDONLY); if (fd < 0) err(1, "open() failed"); cap_rights_init(&setrights, CAP_FSTAT, CAP_READ); if (cap_rights_limit(fd, &setrights) < 0 && errno != ENOSYS) err(1, "cap_rights_limit() failed"); if (cap_rights_get(fd, &getrights) < 0 && errno != ENOSYS) err(1, "cap_rights_get() failed"); assert(memcmp(&setrights, &getrights, sizeof(setrights)) == 0); .Ed .Sh ERRORS .Fn cap_rights_get succeeds unless: l -tag -width Er t Bq Er EBADF The .Fa fd argument is not a valid active descriptor. t Bq Er EFAULT The .Fa rights argument points at an invalid address. .El .Sh SEE ALSO .Xr cap_rights_limit 2 , .Xr cap_rights_init 3 , .Xr errno 2 , .Xr open 2 , .Xr assert 3 , .Xr err 3 , .Xr memcmp 3 , .Xr memset 3 , .Xr capsicum 4 , .Xr rights 4 .Sh HISTORY Support for capabilities and capabilities mode was developed as part of the .Tn TrustedBSD Project. .Sh AUTHORS This function was created by .An Pawel Jakub Dawidek Aq pawel@dawidek.net under sponsorship of the FreeBSD Foundation.