libssh2_channel_read_stderr - convenience macro for libssh2_channel_read_ex(3) calls #include <libssh2.h> ssize_t libssh2_channel_read_stderr(LIBSSH2_CHANNEL *channel, char *buf, size_t buflen); This is a macro defined in a public libssh2 header file that is using the underlying function libssh2_channel_read_ex(3). See libssh2_channel_read_ex(3) See libssh2_channel_read_ex(3) libssh2_channel_read_ex(3)