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MFC: 272451, 272653 add CAP_EVENT so that we can poll() on netmap and pcap

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file descriptors
This commit is contained in:
luigi 2015-05-26 21:12:02 +00:00
parent fcb7b0e8b6
commit cf32ec5d9e
1 changed files with 6 additions and 1 deletions
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7
contrib/tcpdump/tcpdump.c
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@ -1486,7 +1486,12 @@ main(int argc, char **argv)
if (RFileName == NULL && VFileName == NULL) {
static const unsigned long cmds[] = { BIOCGSTATS };
cap_rights_init(&rights, CAP_IOCTL, CAP_READ);
/*
* The various libpcap devices use a combination of
* read (bpf), ioctl (bpf, netmap), poll (netmap).
* Grant the relevant access rights, sorted by name.
*/
cap_rights_init(&rights, CAP_EVENT, CAP_IOCTL, CAP_READ);
if (cap_rights_limit(pcap_fileno(pd), &rights) < 0 &&
errno != ENOSYS) {
error("unable to limit pcap descriptor");