picnoir
/
Systemd
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Let sd_machine_get_ifindices() omit the output param too 

Nowadays we do that almost everywhere, let's also do it here.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2020-07-30 13:08:52 +02:00
parent 0ef14adc1c
commit dd630d3cac
2 changed files with 21 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
man/sd_machine_get_class.xml
View File

@ -53,21 +53,22 @@
project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
call after use.</para>
<para><function>sd_machine_get_ifindices()</function> may be used
to determine the numeric indices of the network interfaces on the
host that are pointing towards the specified locally running
virtual machine or container that is registered with
<para><function>sd_machine_get_ifindices()</function> may be used to determine the numeric indices of the
network interfaces on the host that are pointing towards the specified locally running virtual machine or
container. The vm or container must be registered with
<citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
The returned array needs to be freed with the libc <citerefentry
project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
call after use.</para>
The output parameter <parameter>ret_ifindices</parameter> may be passed as <constant>NULL</constant> when
the output value is not needed. The returned array needs to be freed with the libc <citerefentry
project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry> call after
use.</para>
</refsect1>
<refsect1>
<title>Return Value</title>
<para>On success, these calls return 0 or a positive integer. On failure, these calls return a negative
errno-style error code.</para>
<para>On success, these functions return a non-negative integer.
<function>sd_machine_get_ifindices()</function> returns the number of the relevant network interfaces.
On failure, these calls return a negative errno-style error code.</para>
<refsect2>
<title>Errors</title>

17
src/libsystemd/sd-login/sd-login.c
View File

@ -900,7 +900,6 @@ _public_ int sd_machine_get_ifindices(const char *machine, int **ret_ifindices)
int r;
assert_return(machine_name_is_valid(machine), -EINVAL);
assert_return(ret_ifindices, -EINVAL);
p = strjoina("/run/systemd/machines/", machine);
r = parse_env_file(NULL, p, "NETIF", &netif_line);
@ -918,9 +917,12 @@ _public_ int sd_machine_get_ifindices(const char *machine, int **ret_ifindices)
return -ENOMEM;
size_t n = 0;
int *ifindices = new(int, strv_length(tt));
if (!ifindices)
return -ENOMEM;
int *ifindices;
if (ret_ifindices) {
ifindices = new(int, strv_length(tt));
if (!ifindices)
return -ENOMEM;
}
for (size_t i = 0; tt[i]; i++) {
int ind;
@ -930,10 +932,13 @@ _public_ int sd_machine_get_ifindices(const char *machine, int **ret_ifindices)
/* Return -EUCLEAN to distinguish from -EINVAL for invalid args */
return ind == -EINVAL ? -EUCLEAN : ind;
ifindices[n++] = ind;
if (ret_ifindices)
ifindices[n] = ind;
n++;
}
*ret_ifindices = ifindices;
if (ret_ifindices)
*ret_ifindices = ifindices;
return n;
}