ARES\_SET\_SORTLIST(3) Library Functions Manual ARES\_SET\_SORTLIST(3) # [NAME](#NAME) ares\_set\_sortlist - Initialize an ares\_channel\_t \*sortlist configuration # [SYNOPSIS](#SYNOPSIS) ``` #include int ares_set_sortlist(ares_channel_t *channel, const char *sortstr) ``` # [DESCRIPTION](#DESCRIPTION) The [**ares\_set\_sortlist(3)**](/man/os/c-ares/ares_set_sortlist.3) function initializes an address sortlist configuration for the channel data identified by *channel*, so that addresses returned by [**ares\_gethostbyname(3)**](/man/os/c-ares/ares_gethostbyname.3) are sorted according to the sortlist. The provided *sortstr* string that holds a space separated list of IP-address-netmask pairs. The netmask is optional but follows the address after a slash if present. For example, "130.155.160.0/255.255.240.0 130.155.0.0". This function replaces any potentially previously configured address sortlist with the ones given in the configuration string. # [RETURN VALUES](#RETURN_VALUES) [**ares\_set\_sortlist(3)**](/man/os/c-ares/ares_set_sortlist.3) may return any of the following values: [**ARES\_SUCCESS**](#ARES_SUCCESS) The sortlist configuration was successfully initialized. [**ARES\_ENOMEM**](#ARES_ENOMEM) The process's available memory was exhausted. [**ARES\_ENODATA**](#ARES_ENODATA) The channel data identified by *channel* was invalid. [**ARES\_ENOTINITIALIZED**](#ARES_ENOTINITIALIZED) c-ares library initialization not yet performed. # [SEE ALSO](#SEE_ALSO) [**ares\_init\_options**(3)](/man/os/c-ares/ares_init_options.3), [**ares\_dup**(3)](/man/os/c-ares/ares_dup.3) # [AVAILABILITY](#AVAILABILITY) [ares\_set\_sortlist(3)](/man/os/c-ares/ares_set_sortlist.3) was added in c-ares 1.11.0 23 November 2015 --- Document: ares_set_sortlist(3) from c-ares 1.34.9-r0 (Chainguard OS) Source: https://github.com/c-ares/c-ares