ifstat metrics not reported for some interfaces based on their name

[ncabatoff]

My desktop's NIC is named enp0s25. A virtualbox guest of it has enp0s3. Neither of them produce ifstat metrics like linux_net_packets, linux_net_errs, etc. The code seems to require that the second line of /proc/net/dev must match this RE:

\s(eth\d+|em\d+_\d+/\d+|em\d+_\d+|em\d+|bond\d+|team\d+|p\d+p\d+_\d+/\d+|p\d+p\d+_\d+|p\d+p\d+):(.*)

It looks like my NICs are being rejected on two counts. First, their names are not in the whitelisted list of patterns. Second, their names are too long, so Linux doesn't put a leading space (the \s at the start of the pattern.) For example:

Inter-|   Receive                                                |  Transmit
 face |bytes    packets errs drop fifo frame compressed multicast|bytes    packets errs drop fifo colls carrier compressed
enp0s3: 1006267169 6639248    0    0    0     0          0    256352 5176892906 3667957    0    0    0     0       0          0
    lo: 169963776847 304993459    0    0    0     0          0         0 169963776847 304993459    0    0    0     0       0          0

Inter-|   Receive                                                |  Transmit
 face |bytes    packets errs drop fifo frame compressed multicast|bytes    packets errs drop fifo colls carrier compressed
enp0s25: 53576888423 79602006    0    0    0     0          0   4945828 16893672173 44642474    0    0    0     0       0          0
    lo: 1138405080 1845942    0    0    0     0          0         0 1138405080 1845942    0    0    0     0       0          0

By comparison, here's one that does work:

Inter-|   Receive                                                |  Transmit
 face |bytes    packets errs drop fifo frame compressed multicast|bytes    packets errs drop fifo colls carrier compressed
    lo:3038824498023 3525462214    0    0    0     0          0         0 3038824498023 3525462214    0    0    0     0       0          0
  eth0:96763269978 225152313    0    0    0     0          0  16490262 142000936142 190268875    0    0    0     0       0          0

[kylebrandt]

#1756 (comment)

[stale]

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