]>
Commit | Line | Data |
---|---|---|
e143e9d8 DM |
1 | package PVE::ProcFSTools; |
2 | ||
3 | use strict; | |
c36f332e | 4 | use warnings; |
5aab227b TL |
5 | |
6 | use Cwd qw(); | |
e143e9d8 | 7 | use IO::File; |
ddcdc5ee | 8 | use List::Util qw(sum); |
5aab227b | 9 | use POSIX; |
f0d1b04f | 10 | use Socket qw(PF_INET PF_INET6 SOCK_DGRAM IPPROTO_IP); |
5aab227b TL |
11 | use Time::HiRes qw (gettimeofday); |
12 | ||
13 | use PVE::Tools; | |
f0d1b04f WB |
14 | |
15 | use constant IFF_UP => 1; | |
16 | use constant IFNAMSIZ => 16; | |
17 | use constant SIOCGIFFLAGS => 0x8913; | |
18 | ||
e143e9d8 DM |
19 | my $clock_ticks = POSIX::sysconf(&POSIX::_SC_CLK_TCK); |
20 | ||
21 | my $cpuinfo; | |
22 | ||
e143e9d8 DM |
23 | sub read_cpuinfo { |
24 | my $fn = '/proc/cpuinfo'; | |
25 | ||
26 | return $cpuinfo if $cpuinfo; | |
27 | ||
28 | my $res = { | |
8104dfe3 | 29 | user_hz => $clock_ticks, |
e143e9d8 DM |
30 | model => 'unknown', |
31 | mhz => 0, | |
32 | cpus => 1, | |
66bda4e0 | 33 | sockets => 1, |
568abb4b | 34 | flags => '', |
e143e9d8 DM |
35 | }; |
36 | ||
37 | my $fh = IO::File->new ($fn, "r"); | |
38 | return $res if !$fh; | |
39 | ||
ddcdc5ee | 40 | my $cpuid = 0; |
4235c2f3 | 41 | my $idhash = {}; |
e143e9d8 DM |
42 | my $count = 0; |
43 | while (defined(my $line = <$fh>)) { | |
44 | if ($line =~ m/^processor\s*:\s*\d+\s*$/i) { | |
45 | $count++; | |
46 | } elsif ($line =~ m/^model\s+name\s*:\s*(.*)\s*$/i) { | |
47 | $res->{model} = $1 if $res->{model} eq 'unknown'; | |
48 | } elsif ($line =~ m/^cpu\s+MHz\s*:\s*(\d+\.\d+)\s*$/i) { | |
49 | $res->{mhz} = $1 if !$res->{mhz}; | |
568abb4b SR |
50 | } elsif ($line =~ m/^flags\s*:\s*(.*)$/) { |
51 | $res->{flags} = $1 if !length $res->{flags}; | |
66bda4e0 | 52 | } elsif ($line =~ m/^physical id\s*:\s*(\d+)\s*$/i) { |
ddcdc5ee MB |
53 | $cpuid = $1; |
54 | $idhash->{$1} = 1 if not defined($idhash->{$1}); | |
55 | } elsif ($line =~ m/^cpu cores\s*:\s*(\d+)\s*$/i) { | |
56 | $idhash->{$cpuid} = $1 if defined($idhash->{$cpuid}); | |
e143e9d8 DM |
57 | } |
58 | } | |
59 | ||
568abb4b SR |
60 | # Hardware Virtual Machine (Intel VT / AMD-V) |
61 | $res->{hvm} = $res->{flags} =~ m/\s(vmx|svm)\s/; | |
62 | ||
4235c2f3 DM |
63 | $res->{sockets} = scalar(keys %$idhash) || 1; |
64 | ||
ddcdc5ee MB |
65 | $res->{cores} = sum(values %$idhash) || 1; |
66 | ||
e143e9d8 DM |
67 | $res->{cpus} = $count; |
68 | ||
69 | $fh->close; | |
568abb4b | 70 | |
e143e9d8 DM |
71 | $cpuinfo = $res; |
72 | ||
73 | return $res; | |
74 | } | |
75 | ||
76 | sub read_proc_uptime { | |
77 | my $ticks = shift; | |
78 | ||
79 | my $line = PVE::Tools::file_read_firstline("/proc/uptime"); | |
80 | if ($line && $line =~ m|^(\d+\.\d+)\s+(\d+\.\d+)\s*$|) { | |
81 | if ($ticks) { | |
5157a3a2 | 82 | return (int($1*$clock_ticks), int($2*$clock_ticks)); |
e143e9d8 DM |
83 | } else { |
84 | return (int($1), int($2)); | |
85 | } | |
86 | } | |
87 | ||
88 | return (0, 0); | |
89 | } | |
90 | ||
2f98cd72 TL |
91 | sub kernel_version { |
92 | my $line = PVE::Tools::file_read_firstline("/proc/version"); | |
93 | ||
94 | if ($line && $line =~ m|^Linux\sversion\s((\d+(?:\.\d+)+)-?(\S+)?)|) { | |
95 | my ($fullversion, $version_numbers, $extra) = ($1, $2, $3); | |
96 | ||
97 | # variable names are the one from the Linux kernel Makefile | |
98 | my ($version, $patchlevel, $sublevel) = split(/\./, $version_numbers); | |
99 | ||
100 | return wantarray | |
101 | ? (int($version), int($patchlevel), int($sublevel), $extra, $fullversion) | |
102 | : $fullversion; | |
103 | } | |
104 | ||
105 | return (0, 0, 0, '', ''); | |
106 | } | |
107 | ||
1446e6a8 TL |
108 | # Check if the kernel is at least $major.$minor. Return either just a boolean, |
109 | # or a boolean and the kernel version's major.minor string from /proc/version | |
110 | sub check_kernel_release { | |
111 | my ($major, $minor) = @_; | |
112 | ||
113 | my ($k_major, $k_minor) = kernel_version(); | |
114 | ||
115 | my $ok; | |
116 | if (defined($minor)) { | |
117 | $ok = $k_major > $major || ($k_major == $major && $k_minor >= $minor); | |
118 | } else { | |
119 | $ok = $k_major >= $major; | |
120 | } | |
121 | ||
122 | return wantarray ? ($ok, "$k_major.$k_minor") : $ok; | |
123 | } | |
124 | ||
e143e9d8 DM |
125 | sub read_loadavg { |
126 | ||
127 | my $line = PVE::Tools::file_read_firstline('/proc/loadavg'); | |
128 | ||
129 | if ($line =~ m|^(\d+\.\d+)\s+(\d+\.\d+)\s+(\d+\.\d+)\s+\d+/\d+\s+\d+\s*$|) { | |
130 | return wantarray ? ($1, $2, $3) : $1; | |
131 | } | |
132 | ||
133 | return wantarray ? (0, 0, 0) : 0; | |
134 | } | |
135 | ||
eadfaabd TL |
136 | sub parse_pressure { |
137 | my ($path) = @_; | |
83874202 AD |
138 | |
139 | my $res = {}; | |
eadfaabd TL |
140 | my $v = qr/\d+\.\d+/; |
141 | my $fh = IO::File->new($path, "r") or return undef; | |
142 | while (defined (my $line = <$fh>)) { | |
143 | if ($line =~ /^(some|full)\s+avg10\=($v)\s+avg60\=($v)\s+avg300\=($v)\s+total\=(\d+)/) { | |
144 | $res->{$1}->{avg10} = $2; | |
145 | $res->{$1}->{avg60} = $3; | |
146 | $res->{$1}->{avg300} = $4; | |
147 | $res->{$1}->{total} = $4; | |
83874202 AD |
148 | } |
149 | } | |
eadfaabd TL |
150 | $fh->close; |
151 | return $res; | |
152 | } | |
153 | ||
154 | sub read_pressure { | |
155 | my $res = {}; | |
156 | foreach my $type (qw(cpu memory io)) { | |
157 | my $stats = parse_pressure("/proc/pressure/$type"); | |
158 | $res->{$type} = $stats if $stats; | |
159 | } | |
83874202 AD |
160 | return $res; |
161 | } | |
162 | ||
e143e9d8 DM |
163 | my $last_proc_stat; |
164 | ||
165 | sub read_proc_stat { | |
5224b31b | 166 | my $res = { user => 0, nice => 0, system => 0, idle => 0 , iowait => 0, irq => 0, softirq => 0, steal => 0, guest => 0, guest_nice => 0, sum => 0}; |
e143e9d8 DM |
167 | |
168 | my $cpucount = 0; | |
169 | ||
170 | if (my $fh = IO::File->new ("/proc/stat", "r")) { | |
171 | while (defined (my $line = <$fh>)) { | |
2e8331ba FE |
172 | if ($line =~ m|^cpu\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)(?:\s+(\d+)\s+(\d+))?|) { |
173 | $res->{user} = $1 - ($9 // 0); | |
174 | $res->{nice} = $2 - ($10 // 0); | |
e143e9d8 DM |
175 | $res->{system} = $3; |
176 | $res->{idle} = $4; | |
24f19ef7 | 177 | $res->{used} = $1+$2+$3+$6+$7+$8; |
e143e9d8 | 178 | $res->{iowait} = $5; |
5a82eb71 DC |
179 | $res->{irq} = $6; |
180 | $res->{softirq} = $7; | |
181 | $res->{steal} = $8; | |
2e8331ba FE |
182 | $res->{guest} = $9 // 0; |
183 | $res->{guest_nice} = $10 // 0; | |
e143e9d8 DM |
184 | } elsif ($line =~ m|^cpu\d+\s|) { |
185 | $cpucount++; | |
186 | } | |
187 | } | |
188 | $fh->close; | |
189 | } | |
190 | ||
191 | $cpucount = 1 if !$cpucount; | |
192 | ||
193 | my $ctime = gettimeofday; # floating point time in seconds | |
194 | ||
c140206b | 195 | # the sum of all fields |
5a82eb71 DC |
196 | $res->{total} = $res->{user} |
197 | + $res->{nice} | |
198 | + $res->{system} | |
199 | + $res->{iowait} | |
200 | + $res->{irq} | |
201 | + $res->{softirq} | |
202 | + $res->{steal} | |
c140206b AD |
203 | + $res->{idle} |
204 | + $res->{guest} | |
205 | + $res->{guest_nice}; | |
5a82eb71 | 206 | |
e143e9d8 DM |
207 | $res->{ctime} = $ctime; |
208 | $res->{cpu} = 0; | |
209 | $res->{wait} = 0; | |
210 | ||
211 | $last_proc_stat = $res if !$last_proc_stat; | |
212 | ||
213 | my $diff = ($ctime - $last_proc_stat->{ctime}) * $clock_ticks * $cpucount; | |
214 | ||
215 | if ($diff > 1000) { # don't update too often | |
216 | my $useddiff = $res->{used} - $last_proc_stat->{used}; | |
217 | $useddiff = $diff if $useddiff > $diff; | |
faa1b46f AD |
218 | |
219 | my $totaldiff = $res->{total} - $last_proc_stat->{total}; | |
220 | $totaldiff = $diff if $totaldiff > $diff; | |
221 | ||
222 | $res->{cpu} = $useddiff/$totaldiff; | |
f27d5e6b | 223 | |
e143e9d8 DM |
224 | my $waitdiff = $res->{iowait} - $last_proc_stat->{iowait}; |
225 | $waitdiff = $diff if $waitdiff > $diff; | |
faa1b46f | 226 | $res->{wait} = $waitdiff/$totaldiff; |
f27d5e6b | 227 | |
e143e9d8 DM |
228 | $last_proc_stat = $res; |
229 | } else { | |
230 | $res->{cpu} = $last_proc_stat->{cpu}; | |
231 | $res->{wait} = $last_proc_stat->{wait}; | |
232 | } | |
233 | ||
234 | return $res; | |
235 | } | |
236 | ||
5157a3a2 | 237 | sub read_proc_pid_stat { |
e143e9d8 DM |
238 | my $pid = shift; |
239 | ||
240 | my $statstr = PVE::Tools::file_read_firstline("/proc/$pid/stat"); | |
241 | ||
5157a3a2 DM |
242 | if ($statstr && $statstr =~ m/^$pid \(.*\) (\S) (-?\d+) -?\d+ -?\d+ -?\d+ -?\d+ \d+ \d+ \d+ \d+ \d+ (\d+) (\d+) (-?\d+) (-?\d+) -?\d+ -?\d+ -?\d+ 0 (\d+) (\d+) (-?\d+) \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ -?\d+ -?\d+ \d+ \d+ \d+/) { |
243 | return { | |
244 | status => $1, | |
34fe9392 | 245 | ppid => $2, |
5157a3a2 DM |
246 | utime => $3, |
247 | stime => $4, | |
248 | starttime => $7, | |
249 | vsize => $8, | |
250 | rss => $9 * 4096, | |
251 | }; | |
e143e9d8 DM |
252 | } |
253 | ||
5157a3a2 DM |
254 | return undef; |
255 | } | |
256 | ||
257 | sub check_process_running { | |
258 | my ($pid, $pstart) = @_; | |
259 | ||
260 | # note: waitpid only work for child processes, but not | |
261 | # for processes spanned by other processes. | |
262 | # kill(0, pid) return succes for zombies. | |
263 | # So we read the status form /proc/$pid/stat instead | |
9bbc4e17 | 264 | |
5157a3a2 | 265 | my $info = read_proc_pid_stat($pid); |
9bbc4e17 | 266 | |
5399d422 | 267 | return $info && (!$pstart || ($info->{starttime} eq $pstart)) && ($info->{status} ne 'Z') ? $info : undef; |
5157a3a2 DM |
268 | } |
269 | ||
270 | sub read_proc_starttime { | |
271 | my $pid = shift; | |
272 | ||
273 | my $info = read_proc_pid_stat($pid); | |
274 | return $info ? $info->{starttime} : 0; | |
e143e9d8 DM |
275 | } |
276 | ||
277 | sub read_meminfo { | |
278 | ||
279 | my $res = { | |
280 | memtotal => 0, | |
281 | memfree => 0, | |
282 | memused => 0, | |
a01c5465 | 283 | memshared => 0, |
e143e9d8 DM |
284 | swaptotal => 0, |
285 | swapfree => 0, | |
286 | swapused => 0, | |
b21af8f5 | 287 | arcsize => 0, |
e143e9d8 DM |
288 | }; |
289 | ||
290 | my $fh = IO::File->new ("/proc/meminfo", "r"); | |
291 | return $res if !$fh; | |
292 | ||
293 | my $d = {}; | |
294 | while (my $line = <$fh>) { | |
295 | if ($line =~ m/^(\S+):\s+(\d+)\s*kB/i) { | |
296 | $d->{lc ($1)} = $2 * 1024; | |
9bbc4e17 | 297 | } |
e143e9d8 DM |
298 | } |
299 | close($fh); | |
300 | ||
301 | $res->{memtotal} = $d->{memtotal}; | |
302 | $res->{memfree} = $d->{memfree} + $d->{buffers} + $d->{cached}; | |
303 | $res->{memused} = $res->{memtotal} - $res->{memfree}; | |
304 | ||
305 | $res->{swaptotal} = $d->{swaptotal}; | |
306 | $res->{swapfree} = $d->{swapfree}; | |
307 | $res->{swapused} = $res->{swaptotal} - $res->{swapfree}; | |
308 | ||
9c1ccaf9 | 309 | my $spages = PVE::Tools::file_read_firstline("/sys/kernel/mm/ksm/pages_sharing") // 0 ; |
a01c5465 DM |
310 | $res->{memshared} = int($spages) * 4096; |
311 | ||
c153bf02 | 312 | my $arc_stats = eval { PVE::Tools::file_get_contents("/proc/spl/kstat/zfs/arcstats") }; |
52620f86 | 313 | if ($arc_stats && $arc_stats =~ m/^size\s+\d+\s+(\d+)$/m) { |
c153bf02 | 314 | $res->{arcsize} = int($1); |
b21af8f5 MH |
315 | } |
316 | ||
e143e9d8 DM |
317 | return $res; |
318 | } | |
319 | ||
320 | # memory usage of current process | |
321 | sub read_memory_usage { | |
322 | ||
323 | my $res = { size => 0, resident => 0, shared => 0 }; | |
324 | ||
325 | my $ps = 4096; | |
326 | ||
327 | my $line = PVE::Tools::file_read_firstline("/proc/$$/statm"); | |
328 | ||
845f01b6 | 329 | if ($line =~ m/^(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s*/) { |
e143e9d8 DM |
330 | $res->{size} = $1*$ps; |
331 | $res->{resident} = $2*$ps; | |
332 | $res->{shared} = $3*$ps; | |
333 | } | |
334 | ||
335 | return $res; | |
336 | } | |
337 | ||
338 | sub read_proc_net_dev { | |
339 | ||
340 | my $res = {}; | |
341 | ||
342 | my $fh = IO::File->new ("/proc/net/dev", "r"); | |
343 | return $res if !$fh; | |
344 | ||
345 | while (defined (my $line = <$fh>)) { | |
346 | if ($line =~ m/^\s*(.*):\s*(\d+)\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+(\d+)\s+/) { | |
347 | $res->{$1} = { | |
348 | receive => $2, | |
349 | transmit => $3, | |
350 | }; | |
351 | } | |
352 | } | |
353 | ||
354 | close($fh); | |
355 | ||
356 | return $res; | |
357 | } | |
358 | ||
0758d092 DM |
359 | sub write_proc_entry { |
360 | my ($filename, $data) = @_;# | |
361 | ||
65ca1743 | 362 | my $fh = IO::File->new($filename, O_WRONLY); |
0758d092 | 363 | die "unable to open file '$filename' - $!\n" if !$fh; |
65ca1743 TL |
364 | print $fh $data or die "unable to write '$filename' - $!\n"; |
365 | close $fh or die "closing file '$filename' failed - $!\n"; | |
0758d092 DM |
366 | $fh->close(); |
367 | } | |
368 | ||
a993e470 DM |
369 | sub read_proc_net_route { |
370 | my $filename = "/proc/net/route"; | |
371 | ||
372 | my $res = []; | |
373 | ||
374 | my $fh = IO::File->new ($filename, "r"); | |
375 | return $res if !$fh; | |
376 | ||
377 | my $int_to_quad = sub { | |
378 | return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0); | |
379 | }; | |
380 | ||
381 | while (defined(my $line = <$fh>)) { | |
382 | next if $line =~/^Iface\s+Destination/; # skip head | |
383 | my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8]; | |
384 | push @$res, { | |
385 | dest => &$int_to_quad(hex($dest)), | |
386 | gateway => &$int_to_quad(hex($gateway)), | |
387 | mask => &$int_to_quad(hex($mask)), | |
388 | metric => $metric, | |
389 | mtu => $mtu, | |
390 | iface => $iface, | |
391 | }; | |
392 | } | |
393 | ||
394 | return $res; | |
395 | } | |
396 | ||
ad571b75 | 397 | sub read_proc_mounts { |
ee834936 | 398 | return PVE::Tools::file_get_contents("/proc/mounts", 512*1024); |
ad571b75 DM |
399 | } |
400 | ||
072dfa92 WB |
401 | # mounts encode spaces (\040), tabs (\011), newlines (\012), backslashes (\\ or \134) |
402 | sub decode_mount { | |
403 | my ($str) = @_; | |
404 | return $str =~ s/\\(?:040|01[12]|134|\\)/"\"$&\""/geer; | |
405 | } | |
406 | ||
407 | sub parse_mounts { | |
408 | my ($mounts) = @_; | |
dc00c052 | 409 | |
072dfa92 WB |
410 | my $mntent = []; |
411 | while ($mounts =~ /^\s*([^#].*)$/gm) { | |
412 | # lines from the file are encoded so we can just split at spaces | |
413 | my ($what, $dir, $fstype, $opts) = split(/[ \t]/, $1, 4); | |
414 | my ($freq, $passno) = (0, 0); | |
415 | # in glibc's parser frequency and pass seem to be optional | |
416 | $freq = $1 if $opts =~ s/\s+(\d+)$//; | |
417 | $passno = $1 if $opts =~ s/\s+(\d+)$//; | |
dc00c052 TL |
418 | push @$mntent, [ |
419 | decode_mount($what), | |
420 | decode_mount($dir), | |
421 | decode_mount($fstype), | |
422 | decode_mount($opts), | |
423 | $freq, | |
424 | $passno, | |
425 | ]; | |
072dfa92 WB |
426 | } |
427 | return $mntent; | |
428 | } | |
429 | ||
430 | sub parse_proc_mounts { | |
431 | return parse_mounts(read_proc_mounts()); | |
432 | } | |
433 | ||
115c8383 WL |
434 | sub is_mounted { |
435 | my ($mountpoint) = @_; | |
436 | ||
11ade4ad WB |
437 | $mountpoint = Cwd::realpath($mountpoint); |
438 | ||
5f808914 FG |
439 | return 0 if !defined($mountpoint); # path does not exist |
440 | ||
072dfa92 WB |
441 | my $mounts = parse_proc_mounts(); |
442 | return (grep { $_->[1] eq $mountpoint } @$mounts) ? 1 : 0; | |
115c8383 WL |
443 | } |
444 | ||
27107d5b WB |
445 | sub read_proc_net_ipv6_route { |
446 | my $filename = "/proc/net/ipv6_route"; | |
447 | ||
448 | my $res = []; | |
449 | ||
450 | my $fh = IO::File->new ($filename, "r"); | |
451 | return $res if !$fh; | |
452 | ||
ef67212c | 453 | my $read_v6addr = sub { $_[0] =~ s/....(?!$)/$&:/gr }; |
27107d5b WB |
454 | |
455 | # ipv6_route has no header | |
456 | while (defined(my $line = <$fh>)) { | |
457 | my ($dest, $prefix, $nexthop, $metric, $iface) = (split(/\s+/, $line))[0,1,4,5,9]; | |
458 | push @$res, { | |
459 | dest => &$read_v6addr($dest), | |
ef67212c | 460 | prefix => hex("$prefix"), |
27107d5b | 461 | gateway => &$read_v6addr($nexthop), |
ef67212c | 462 | metric => hex("$metric"), |
27107d5b WB |
463 | iface => $iface |
464 | }; | |
465 | } | |
466 | ||
467 | return $res; | |
468 | } | |
469 | ||
c1073fdc TL |
470 | sub upid_wait { |
471 | my ($upid, $waitfunc, $sleep_intervall) = @_; | |
472 | ||
473 | my $task = PVE::Tools::upid_decode($upid); | |
474 | ||
475 | $sleep_intervall = $sleep_intervall ? $sleep_intervall : 1; | |
476 | ||
477 | my $next_time = time + $sleep_intervall; | |
478 | ||
479 | while (check_process_running($task->{pid}, $task->{pstart})) { | |
480 | ||
481 | if (time >= $next_time && $waitfunc && ref($waitfunc) eq 'CODE'){ | |
482 | &$waitfunc($task); | |
483 | $next_time = time + $sleep_intervall; | |
484 | } | |
485 | ||
486 | CORE::sleep(1); | |
487 | } | |
488 | } | |
489 | ||
f0d1b04f WB |
490 | # struct ifreq { // FOR SIOCGIFFLAGS: |
491 | # char ifrn_name[IFNAMSIZ] | |
492 | # short ifru_flags | |
493 | # }; | |
494 | my $STRUCT_IFREQ_SIOCGIFFLAGS = 'Z' . IFNAMSIZ . 's1'; | |
495 | sub get_active_network_interfaces { | |
496 | # Use the interface name list from /proc/net/dev | |
497 | open my $fh, '<', '/proc/net/dev' | |
498 | or die "failed to open /proc/net/dev: $!\n"; | |
499 | # And filter by IFF_UP flag fetched via a PF_INET6 socket ioctl: | |
500 | my $sock; | |
501 | socket($sock, PF_INET6, SOCK_DGRAM, &IPPROTO_IP) | |
502 | or socket($sock, PF_INET, SOCK_DGRAM, &IPPROTO_IP) | |
503 | or return []; | |
504 | ||
505 | my $ifaces = []; | |
506 | while(defined(my $line = <$fh>)) { | |
507 | next if $line !~ /^\s*([^:\s]+):/; | |
508 | my $ifname = $1; | |
509 | my $ifreq = pack($STRUCT_IFREQ_SIOCGIFFLAGS, $ifname, 0); | |
510 | if (!defined(ioctl($sock, SIOCGIFFLAGS, $ifreq))) { | |
511 | warn "failed to get interface flags for: $ifname\n"; | |
512 | next; | |
513 | } | |
514 | my ($name, $flags) = unpack($STRUCT_IFREQ_SIOCGIFFLAGS, $ifreq); | |
515 | push @$ifaces, $ifname if ($flags & IFF_UP); | |
516 | } | |
517 | close $fh; | |
518 | close $sock; | |
519 | return $ifaces; | |
520 | } | |
521 | ||
e143e9d8 | 522 | 1; |