API compatibility

Source code compatibility for SCO OpenServer applications

The ability to recompile on UnixWare 7 code that was developed on SCO OpenServer is limited by the interfaces that the UnixWare 7 and SCO OpenServer implementations of libc have in common.

Fortunately, there is a great deal in common between the two implementations. The problem areas are:

Functions defined in different libraries

Name UnixWare 7
library SCO OpenServer
library

dial libnsl libc

eaccess libgen libc

getutmp libc
libgen libc

getutmpx libc
libgen libc

gsignal libgen libc

nlist libelf libc

ssignal libgen libc

updwtmp libgen libc

Name	UnixWare 7 library	SCO OpenServer library
dial	libnsl	libc
eaccess	libgen	libc
getutmp	libc libgen	libc
getutmpx	libc libgen	libc
gsignal	libgen	libc
nlist	libelf	libc
ssignal	libgen	libc
updwtmp	libgen	libc

Functions that exist only on SCO OpenServer

Name UnixWare 7 alternative

defopen On SCO OpenServer, this function is in libc; on UnixWare 7, a similar function with the same name exists in libxattr, which has slightly different calling parameters. See /usr/include/deflt.h.

defread On SCO OpenServer, this function is in libc; on UnixWare 7, a similar function with the same name exists in libxattr, which has slightly different calling parameters. See /usr/include/deflt.h.

nl_cxtime Provided for XPG2 conformance on SCO OpenServer only; see strftime(3C) instead.

nl_ascxtime Provided for XPG2 conformance on SCO OpenServer only; see strftime(3C) instead.

nl_printf Provided for XPG2 conformance on SCO OpenServer only; see fprintf(3S) instead.

nl_fprintf Provided for XPG2 conformance on SCO OpenServer only; see fprintf(3S) instead.

nl_sprintf Provided for XPG2 conformance on SCO OpenServer only; see fprintf(3S) instead.

nl_scanf Provided for XPG2 conformance on SCO OpenServer only; see fscanf(3S) instead.

nl_fscanf Provided for XPG2 conformance on SCO OpenServer only; see fscanf(3S) instead.

nl_sscanf Provided for XPG2 conformance on SCO OpenServer only; see fscanf(3S) instead.

nl_init Provided for XPG2 conformance on SCO OpenServer only; see setlocale(3C) instead.

nl_strcmp Provided for XPG2 conformance on SCO OpenServer only; see string(3C) instead.

nl_strncmp No equivalent on UnixWare.

sched_get_priority_max sched_get_priority_min sched_get_rr_interval sched_getparam sched_getscheduler sched_setparam sched_setscheduler sched_yield No equivalent on UnixWare.

__scoinfo sysinfo(2)

setegid setregid(3C)

seteuid setreuid(3C)

statlstat stat(2)

strncoll No equivalent on UnixWare.

strnxfrm No equivalent on UnixWare.

usersgroups getuid(2), getgroups(2)

Name	UnixWare 7 alternative
defopen	On SCO OpenServer, this function is in libc; on UnixWare 7, a similar function with the same name exists in libxattr, which has slightly different calling parameters. See /usr/include/deflt.h.
defread	On SCO OpenServer, this function is in libc; on UnixWare 7, a similar function with the same name exists in libxattr, which has slightly different calling parameters. See /usr/include/deflt.h.
nl_cxtime	Provided for XPG2 conformance on SCO OpenServer only; see strftime(3C) instead.
nl_ascxtime	Provided for XPG2 conformance on SCO OpenServer only; see strftime(3C) instead.
nl_printf	Provided for XPG2 conformance on SCO OpenServer only; see fprintf(3S) instead.
nl_fprintf	Provided for XPG2 conformance on SCO OpenServer only; see fprintf(3S) instead.
nl_sprintf	Provided for XPG2 conformance on SCO OpenServer only; see fprintf(3S) instead.
nl_scanf	Provided for XPG2 conformance on SCO OpenServer only; see fscanf(3S) instead.
nl_fscanf	Provided for XPG2 conformance on SCO OpenServer only; see fscanf(3S) instead.
nl_sscanf	Provided for XPG2 conformance on SCO OpenServer only; see fscanf(3S) instead.
nl_init	Provided for XPG2 conformance on SCO OpenServer only; see setlocale(3C) instead.
nl_strcmp	Provided for XPG2 conformance on SCO OpenServer only; see string(3C) instead.
nl_strncmp	No equivalent on UnixWare.
sched_get_priority_max sched_get_priority_min sched_get_rr_interval sched_getparam sched_getscheduler sched_setparam sched_setscheduler sched_yield	No equivalent on UnixWare.
__scoinfo	sysinfo(2)
setegid	setregid(3C)
seteuid	setreuid(3C)
statlstat	stat(2)
strncoll	No equivalent on UnixWare.
strnxfrm	No equivalent on UnixWare.
usersgroups	getuid(2), getgroups(2)

Data structure incompatibilities

The compatiblity tables for libc discuss any incompatibilities in the data structures used by the functions in libc on SCO OpenServer and UnixWare. The tables begin in the section ``libc compatibility table (a64l - bzero)''.