std-unix@longway.TIC.COM (Moderator, John S. Quarterman) (05/22/89)
Newsgroups: comp.std.unix
From: uunet!rti.rti.org!tijc02.uucp!pjs269 (Paul Schmidt )
Are the UNIX System Parameters part of any standard?
How do you develop an application that uses system
calls such as msgget, shmget, and semget, so that they
will run on all systems without violating the system-
imposed limits?
I know that for AT&T UNIX System V.2 on DEC processors
these limits are configurable. On Apollos they are not.
What about SUN? Are there any workstations that can be
configured?
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Paul Schmidt USENET: rti!tijc02!pjs269
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Volume-Number: Volume 16, Number 49std-unix@longway.TIC.COM (Moderator, John S. Quarterman) (05/24/89)
From: uunet!posix!hlj (Hal Jespersen) In article <352@longway.TIC.COM> uunet!rti.rti.org!tijc02.uucp!pjs269 (Paul Schmidt ) writes: >Newsgroups: comp.std.unix >From: uunet!rti.rti.org!tijc02.uucp!pjs269 (Paul Schmidt ) > >Are the UNIX System Parameters part of any standard? >How do you develop an application that uses system >calls such as msgget, shmget, and semget, so that they >will run on all systems without violating the system- >imposed limits? > > I know that for AT&T UNIX System V.2 on DEC processors >these limits are configurable. On Apollos they are not. >What about SUN? Are there any workstations that can be >configured? There are really two answers here. POSIX.1 has included all the "system parameters" you need [we hope!] to use its interfaces. The functions you cite are not in POSIX.1, although similar to some in POSIX.4 (Real- time). But, implementations based on System V that support POSIX will probably also support all the traditional System V calls as well. One option is for those systems to extend the sysconf() function of POSIX.1 to query all the appropriate things. For example, the M88000 Binary Compatibility Standard (BCS) published by 88open Consortium is a merge of POSIX.1 and SVR3.2. It has extended sysconf() to provide all the values you need. The Motorola/UniSoft 68K BCS does the same, and I would presume other similar efforts are underway elsewhere. Maybe folks listening in could provide such plans. Hal Jespersen POSIX Software Group 447 Lakeview Way Redwood City, CA 94062 Phone: +1 (415) 364-3410 FAX: +1 (415) 364-4498 UUCP: uunet!posix!hlj Volume-Number: Volume 16, Number 50
tihor@acf4.NYU.EDU (Stephen Tihor) (05/26/89)
Newsgroups: comp.std.unix From: tihor@acf4.NYU.EDU (Stephen Tihor) What are the POSIX parameters related to the system password and user name string sizes? I want to specify them in some local standards so that when vendors start supporting reaonable lenght username/passwrods software will automatically adjust. Volume-Number: Volume 16, Number 51