unistd.h 1324 compat/nedmalloc/malloc.c.h #include <unistd.h>     /* for sbrk, sysconf */
unistd.h   56 compat/poll/poll.c # include <unistd.h>
unistd.h  150 git-compat-util.h #include <unistd.h>
unistd.h   29 xdiff/xinclude.h #include <unistd.h>