# Posix APIs The following APIs are provided with the C99 library for improved POSIX compliance: - [<search.h>](https://docs.qualcomm.com/doc/80-N3040-23/topic/c_posix_search.html): For manipulating search tables - [<strings.h>](https://docs.qualcomm.com/doc/80-N3040-23/topic/c_posix_strings.html): For manipulating strings - [<sys/stat.h>](https://docs.qualcomm.com/doc/80-N3040-23/topic/c_posix_sys-stat.html): For file query operations - [<sys/time.h>](https://docs.qualcomm.com/doc/80-N3040-23/topic/c_posix_sys-time.html): For defining the timeval structure and gettimeofday function - [<sys/times.h>](https://docs.qualcomm.com/doc/80-N3040-23/topic/c_posix_sys-times.html): For defining the tms structure and the times function prototype - [<unistd.h>](https://docs.qualcomm.com/doc/80-N3040-23/topic/c_posix_unistd.html): For defining standard symbolic constants and types Last Published: Oct 06, 2026 [Previous Topic Dinkumware, Ltd. Copyright and License Notice](https://docs.qualcomm.com/bundle/publicresource/80-N3040-23/topics/c_crit_pjp.md) Next Topic