HP-UX Reference (11i v1 05/09) - 5 Miscellaneous Topics (vol 9)

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unistd(5) unistd(5)

_POSIX_SAVED_IDS

Effective user and group are saved across an

exec() call (true of all HP-

UX implementations).

_POSIX_FSYNC Implementation supports File Synchronization (true of all HP-UX imple-

mentations). See open(2).

_POSIX_SYNCHRONIZED_IO

Implementation supports Synchronized IO (true of all HP-UX implementa-

tions). See open(2).

_POSIX_VDISABLE

Terminal special characters can be disabled using this character (see ter-

mio(7)).

_POSIX_THREADS

Implementation supports POSIX threads.

_POSIX2_C_BIND

All POSIX.2 C-language functionality is provided in the default libraries

used by the

c89 C compiler (see cc(1)).

_POSIX2_LOCALEDEF

New locales can be deﬁned by using the

localedef command (see

localedef(1M)).

_POSIX2_UPE The system supports IEEE Std1003.2a (POSIX User Portability Utilities

Option).

_POSIX2_CHAR_TERM

At least one terminal exists that supports all required POSIX.2a com-

mands.

All symbolic constants whose names begin

_CS, _PC, and _SC (see confstr(3C), pathconf(2), and sys-

conf(2)) are deﬁned.

The following symbolic constants for ﬁle streams are deﬁned:

STDIN_FILENO File number of standard input (stdin).

STDOUT_FILENO File number of standard output (stdout).

STDERR_FILENO File number of standard error (stderr).

The types size_t, ssize_t, uid_t, gid_t, off_t, and pid_t are deﬁned.

Declarations are provided for the following functions:

access() alarm() brk() chdir()

chown() chroot() close() confstr()

crypt() ctermid() cuserid() dup()

dup2() encrypt() endusershell() execl()

execle() execlp() execv() execve()

execvp() _exit() fchown() fork()

fpathconf() fsync() ftruncate() getcwd()

getegid() geteuid() getgid() getgroups()

gethostname() getlogin() getopt()

getpass() getpgrp() getpgrp2() getpid()

getppid() getuid() getusershell() initgroups()

ioctl() isatty() link() lockf()

logname() lseek() mkstemp() mktemp()

nice() pathconf() pause() pipe()

prealloc() read() readlink() rmdir()

sbrk() setgid() setgroups() sethostname()

setpgid() setpgrp() setpgrp2() setresgid()

setresuid() setsid() setuid() setusershell()

sgetl() sleep() sputl() swab()

swapon() symlink() sync() sysconf()

tcgetpgrp() tcsetpgrp() truncate() ttyname()

ttyslot() unlink() vfork() write()