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| author | Danny Milosavljevic <dannym@scratchpost.org> | 2017-07-04 02:56:02 +0200 |
|---|---|---|
| committer | Danny Milosavljevic <dannym@scratchpost.org> | 2017-07-12 16:15:30 +0200 |
| commit | 0bc6fe323d34aabc7f51fa80b8872a2c1770d32a (patch) | |
| tree | 9bdf1dd7363cf0398683faf3d7197bbce4b54fd7 | |
| parent | 839ee8d5477bf75764afe18d9cb2addc7c0acf05 (diff) | |
| download | patches-0bc6fe323d34aabc7f51fa80b8872a2c1770d32a.tar patches-0bc6fe323d34aabc7f51fa80b8872a2c1770d32a.tar.gz | |
syscalls: Add network-interface-running?
* guix/build/syscalls.scm (network-interface-running?): New variable.
Export it.
* tests/syscalls.scm: Add test.
Co-authored-by: John Darrington <jmd@gnu.org>
| -rw-r--r-- | guix/build/syscalls.scm | 9 | ||||
| -rw-r--r-- | tests/syscalls.scm | 10 |
2 files changed, 19 insertions, 0 deletions
diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm index 549612fa3c..33a23edaac 100644 --- a/guix/build/syscalls.scm +++ b/guix/build/syscalls.scm @@ -92,6 +92,7 @@ all-network-interface-names network-interface-names network-interface-netmask + network-interface-running? loopback-network-interface? network-interface-address set-network-interface-netmask @@ -1156,6 +1157,7 @@ bytes." (define-as-needed IFF_UP #x1) ;Interface is up (define-as-needed IFF_BROADCAST #x2) ;Broadcast address valid. (define-as-needed IFF_LOOPBACK #x8) ;Is a loopback net. +(define-as-needed IFF_RUNNING #x40) ;interface RFC2863 OPER_UP (define IF_NAMESIZE 16) ;maximum interface name size @@ -1330,6 +1332,13 @@ interface NAME." (close-port sock) (not (zero? (logand flags IFF_LOOPBACK))))) +(define (network-interface-running? name) + "Return true if NAME designates a running network interface." + (let* ((sock (socket SOCK_STREAM AF_INET 0)) + (flags (network-interface-flags sock name))) + (close-port sock) + (not (zero? (logand flags IFF_RUNNING))))) + (define-as-needed (set-network-interface-flags socket name flags) "Set the flag of network interface NAME to FLAGS." (let ((req (make-bytevector ifreq-struct-size))) diff --git a/tests/syscalls.scm b/tests/syscalls.scm index 8c048e6109..2b5c4c3be1 100644 --- a/tests/syscalls.scm +++ b/tests/syscalls.scm @@ -361,6 +361,16 @@ (lambda args (system-error-errno args))))) +(test-equal "loopback-network-interface-running?" + ENODEV + (and (network-interface-running? "lo") + (catch 'system-error + (lambda () + (network-interface-running? "nonexistent") + #f) + (lambda args + (system-error-errno args))))) + (test-skip (if (zero? (getuid)) 1 0)) (test-assert "set-network-interface-flags" (let ((sock (socket AF_INET SOCK_STREAM 0))) |