flux_response_decode(3)

SYNOPSIS

#include <flux/core.h>

int flux_response_decode (const flux_msg_t *msg,
                          const char **topic,
                          const char **s);

int flux_response_decode_raw (const flux_msg_t *msg,
                              const char **topic,
                              const void **data,
                              int *len);

int flux_response_decode_error (const flux_msg_t *msg,
                                const char *errstr);

Link with -lflux-core.

DESCRIPTION

flux_response_decode() decodes a response message msg.

topic, if non-NULL, will be set to the message's topic string. The storage for this string belongs to msg and should not be freed.

s, if non-NULL, will be set to the message's NULL-terminated string payload. If no payload exists, it is set to NULL. The storage for this string belongs to msg and should not be freed.

flux_response_decode_raw() decodes a response message with a raw payload, setting data and len to the payload data and length. The storage for the raw payload belongs to msg and should not be freed.

flux_response_decode_error() decodes an optional error string included with an error response. This fails if the response is not an error, or does not include an error string payload.

RETURN VALUE

These functions return 0 on success. On error, -1 is returned, and errno is set appropriately.

ERRORS

EINVAL: The msg argument was NULL.
EPROTO: Message decoding failed, such as due to incorrect message type, missing topic string, etc.
ENOENT: flux_response_decode_error() was called on a message with no error response payload.

RESOURCES

Flux: http://flux-framework.org

Flux RFC: https://flux-framework.readthedocs.io/projects/flux-rfc