pread (2)
NAME
pread, pwrite - read from or write to a file descriptor at a given offsetSYNOPSIS
#include <unistd.h> ssize_t pread(int fd, void *buf, size_t count, off_t offset); ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset);Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
pread(), pwrite():
_XOPEN_SOURCE >= 500
|| /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L