Gearmand documentation, http://gearman.info/
#include <libgearman/gearman.h>
const char *gearman_worker_error(const gearman_worker_st *worker)
int gearman_worker_errno(gearman_worker_st *worker)
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gearman_worker_error() and gearman_worker_errno() report on the last errors that the worker reported/stored in gearman_worker_st. If you are interested in recording all errors please see gearman_worker_set_log_fn().
gearman_worker_errno() returns the last errno that the worker recorded.
To find out more information please check: http://gearman.info/
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