This commit implements the %devicename specifier for the volume module
for both PulseAudio and ALSA. This way, i3status will be able to display
the specific device that corresponds to the volume indicator.
Note that this is not implemented for the OSS API but is left in a state
where someone can pick it up for the future.
When using ALSA, the "Capture" mixer doesn't have the playback channel,
instead "capture"-related methods should be used to get information
about the current volume / state of the mixer.
Currently, the module cpu_usage prints %cpu0 information for the invalid
%cpu placeholder (i.e. the cpu number is missing).
Consider the following configuration.
order += "cpu_usage"
cpu_usage {
format = "cpu0=%cpu0 cpu1=%cpu1 cpu=%cpu"
# missing cpu number -------------------^
}
The configuration above produces the output below.
$ i3status -c config
i3status: trying to auto-detect output_format setting
i3status: auto-detected "term"
cpu0=-2% cpu1=-49% cpu=-2%
cpu0=06% cpu1=02% cpu=06%
cpu0=05% cpu1=06% cpu=05%
...
The module prints %cpu0 at the third placeholder where it should report
an error.
This commit fixes this behavior by initializing `number' to -1. If the
cpu is missing in %cpu placeholder, the sscanf function does not set
`number'. Because `number' is -1 (lower to 0), an error is reported and
the placeholder is skipped.
$ i3status -c ./config
i3status: trying to auto-detect output_format setting
i3status: auto-detected "term"
provided CPU number '-1' above detected number of CPU 4
cpu0= cpu1=-48% cpu=
provided CPU number '-1' above detected number of CPU 4
cpu0= cpu1=11% cpu=
provided CPU number '-1' above detected number of CPU 4
cpu0= cpu1=03% cpu=
...
its now possible to have percentage before and after a variable. except
for the date. But percentage with dates does not make much sense to me, so
i skipped it.
Since the following commit in the Linux kernel tree
0fdc100bdc4b ethtool: allow non-netadmin to query settings
it is no longer necessary to have the CAP_NET_ADMIN capability to query
a device speed using ioctl(..., SIOCETHTOOL) in conjonction with the
ETHTOOL_GSET ethtool command.
The mentioned commit landed first in the 2.6.37 version of the Kernel.
This version is no longer maintained nowdays.
Since it is not necessary anymore, it is strongly prefered from a
security standpoint to drop the CAP_NET_ADMIN capability from the
binary.
Signed-off-by: Olivier Gayot <olivier.gayot@sigexec.com>
Calling globfree(NULL) is undefined behaviour. In Linux (glibc), it
results in a segmentation fault.
It is also undefined behaviour to call globfree(&pglob) if a previous
call to glob(&pglob) returned an error.
Signed-off-by: Olivier Gayot <olivier.gayot@sigexec.com>
