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| Organization | International Business Machines Corporation |
|---|---|
| Author | William L. Toth |
| Product Identification | Version/Release Number | Product Supplier | |
|---|---|---|---|
| 1. | AIX 5L for POWER V5.1 | Version 5, Release 1, Modification 0 dated 11-2001 or later (PID 5765-E61) | International Business Machines Corporation |
| Testing Environment | Binary-compatible Family | Portability Environment | Indicator of Compliance | Compliance Details | |
|---|---|---|---|---|---|
| 1. |
|
| Internationalised System Calls and Libraries Extended V2 | Test Report from Test Suite | Test Suite:
VSC 5.1.2 Test Report: OSCC-CTR-09-XCU |
Question 1: Which of the following options, specified in the <unistd.h> header, are available on the system?
Response
| Macro Name | Meaning | Provided |
|---|---|---|
| _POSIX2_C_BIND | Implementation supports the C language binding option. | Yes |
| _POSIX2_C_DEV | Implementation supports the C language development utilities option. | No |
| _POSIX2_CHAR_TERM | Implementation supports at least one terminal type. | Yes |
| _POSIX2_FORT_DEV | Implementation supports the FORTRAN Development Utilities Option. | No |
| _POSIX2_FORT_RUN | Implementation supports the FORTRAN Run-time Utilities. | No |
| _POSIX2_LOCALEDEF | Implementation supports the creation of locales by the localedef utility. | Yes |
| _POSIX2_SW_DEV | Implementation supports the Software Developments Utilities Option. | Yes |
| _POSIX2_UPE | Implementation supports the User Portability Utilities Option. | Yes |
Rationale
For a Commands and Utilities V3 conformant implementation, _POSIX2_C_BIND, _POSIX2_CHAR_TERM, _POSIX2_LOCALDEF and _POSIX2_UPE must be supported. The other constants identify optional functionality that an implementation may or may not choose to support.
Reference
CAE Specification, System Interfaces and Headers, Issue 5, Chapter 4, Headers, <unistd.h>.
Question 2: Which of the development utilities are not provided with the implementation?
Response
None of the development utilities are provided.
Rationale
The development utilities are required to exist on designated DEVELOPMENT systems but may not be present on all XSI-conformant systems. The dis utility is defined as optional and need not be present even on systems that support the remainder of the development utilities.
Reference
CAE Specification, Commands and Utilities, Issue 5, Section 1.3.1, Optional, and Section 1.3.2, Development.
Question 3: Is the FORTRAN fort77 utility provided?
Response
No
Rationale
The fort77 utility is the command level interface to the FORTRAN compiler, which need not be provided.
Reference
CAE Specification, Commands and Utilities, Issue 5, Section 1.3.3, FORTRAN.
Question 4: Which of the following utilities and utility options are not supported on the implementation?
Response
| Utility | Option | Supported |
|---|---|---|
| ar | -s | Yes |
| lp | -m | Yes |
| -o | Yes | |
| -t | Yes | |
| -w | Yes | |
| sort | -z | Yes |
| tabs | +m | Yes |
| uucp | -C | Yes |
| -f | Yes | |
| -j | Yes | |
| -n | Yes | |
| -r | Yes | |
| uustat | -q | Yes |
| -r | Yes | |
| uux | -j,-- | Yes |
Rationale
A number of utilities and utility options are marked as possibly unsupportable features, and the functionality associated with these need not be present in a conforming implementation.
Reference
CAE Specification, Commands and Utilities, Issue 5, Section 1.7, Portability.
Question 5: Which of the following Legacy utilities are provided?
Response
All of the legacy utilities are provided.
Rationale
The Legacy utilities are optional on XSI-conformant systems.
Reference
CAE Specification, Commands and Utilities, Issue 5, Section 1.3, LEGACY.
Question 6: How does the at command interpret a non-null SHELL environment variable?
Response
Uses the shell specified in the SHELL environment variable.
Rationale
The interpretation of the SHELL environment variable can cause at to invoke different versions of the shell on some implementations.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, at, ENVIRONMENT VARIABLES, SHELL.
Question 7: What is the limit on the number of open streams provided by awk?
Response
Rationale
The number of open streams that are available to awk may differ between implementations, possibly depending on the number of streams that are available to a process ({FOPEN_MAX}).
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, awk, Input/Output and General Functions, close().
Question 8: How does the batch command interpret a non-null SHELL environment variable?
Response
Uses the shell specified in the SHELL environment variable.
Rationale
The interpretation of the SHELL environment variable can cause batch to invoke different versions of the shell on some implementations.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, batch, ENVIRONMENT VARIABLES, SHELL.
Question 9: Which defined names are automatically provided by the compiler?
Response
Rationale
The automatic provision of defined names by the compiler can cause these names to be unavailable in the name space for defined names.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, c89, OPTIONS, -D.
Question 10: When multiple input files are specified, where does c89 direct identification messages designating the start of each input file processing?
Response
Standard output.
Rationale
These messages, if produced, must be written to one or the other of standard output and standard error, but not to both. The destination of these messages is useful in determining redirections that are necessary to identify the input files from which warning messages are generated.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, c89, STDOUT and STDERR.
Question 11: What are the limits associated with external symbols imposed by c89?
Response
| Description | Minimum Maximum | Implementation Maximum |
|---|---|---|
| Number of significant bytes | 31 | 520 |
| Number of external symbols per source or object file | 511 | 511 but MEMORY LIMITED |
| Total number of external symbols | 4095 | 4095 but MEMORY LIMITED |
Rationale
These limits vary between implementations and cannot be reset by the user. The XCU definition gives the minimum maximum value for each of the values. Some applications may require larger limits than these minimum maxima.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, c89, EXTENDED DESCRIPTION, External Symbols.
Question 12: What is the affect of alternate access control mechanisms on file copies?
Response
Rationale
Because of the additional restrictions on creating files and reading data from files, the cp utility may not behave as described when alternate access control mechanisms are in use.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, cp, DESCRIPTION (final paragraph).
Question 13: Does date permit the setting of the date and time?
Response
Yes
Rationale
Some systems, particularly those that are hosted as part of a total system environment, do not allow the date command to set the date. On such systems, the setting of the date can only be accomplished from the host environment.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, date, OPERANDS, mmddhhmm[yy].
Question 14: What restrictions are imposed on the set of commands within the rhs of the map command?
Response
Rationale
Implementations may impose restrictions on the commands that can be used by macros in visual mode.
Reference
CAE Specifications, Commands and Utilities, Issue 5, Chapter 3, Utilities, ex, EXTENDED DESCRIPTION, Command Descriptions in ex, Map.
Question 15: Is the history list mechanism disabled for users with appropriate privileges who do not set HISTFILE?
Response
No
Rationale
The specification states that an implementation may, in certain circumstances, disable the history list mechanism for users with appropriate privileges who do not set HISTFILE. This could have some security implications.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, fc, ENVIRONMENT VARIABLES, HISTFILE.
Question 16: When multiple input files are specified, where does fort77 direct identification messages designating the start of each input file processing?
Response
Not applicable.
Rationale
These messages, if produced, must be written to one or the other of standard output and standard error, but not to both. The destination of these messages is useful in determining redirections that are necessary to identify the input files from which warning messages are generated. If the response is not applicable then the fort77 utility is not supported.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, fort77, STDERR.
Question 17: What are the limits associated with external symbols imposed by fort77?
Response
| Description | Minimum Maximum | Implementation Maximum |
|---|---|---|
| Number of significant bytes | 31 | Not supported |
| Number of external symbols per source or object file | 511 | not supported |
| Total number of external symbols | 4095 | not supported |
Rationale
These limits vary between implementations and cannot be reset by the user. The specification gives the minimum maximum value for each of the values. Some applications may require larger limits than these minimum maxima. If the responses are not supported then the fort77 utility is not supported.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, fort77, EXTENDED DESCRIPTION, External Symbols.
Question 18: Where are error messages sent when the lex -t option is not specified?
Response
Not applicable.
Rationale
These messages can be directed to either standard output or standard error, though the messages are not allowed to be directed to both. An application may wish to redirect these messages to a file.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, lex, STDOUT.
Question 19: Can ln create links to a directory?
Response
No
Rationale
Implementations may disallow the creation of hard links to a directory, even though the executing process has the appropriate privileges.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, ln, OPERANDS, source_file.
Question 20: What is the default character mapping used when the localedef -f option is not specified?
Response
Rationale
The specification does not define a specific character mapping as the default for conforming systems. This character mapping provides encoding information for the members of the portable character set.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, localedef, OPTIONS, -f.
Question 21: What lp option or operator command is used to suppress the printing of a banner page?
Response
Rationale
The user may require that banner pages are suppressed in cases where pre-printed forms are used and the stationary is of a non-standard length.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, lp, DESCRIPTION.
Question 22: How many bytes are in a block as reported by ls?
Response
Rationale
The block size used by ls to report the number of blocks occupied by a file varies from system to system; often this depends on the underlying file system architecture.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, ls, OPTIONS, -s.
Question 23: What additional variables does make add to its environment?
Response
Rationale
The implementation of make may set certain environment variables on invocation of make. These variables may not be set by the user, thus reducing the name space for environment variables.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, make, EXTENDED DESCRIPTION, Makefile Execution.
Question 24: Does the default MAKEFLAGS environment variable contain additional implementation-dependent options?
Response
Rationale
The implementation of make may set certain default MAKEFLAGS options on invocation of make. These variables are in addition to those set by the user on the command line and could affect the processing of make.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, make, EXTENDED DESCRIPTION, Makefile Execution.
Question 25: Does newgrp allow users who are not listed as a member of a group which has no password to change to that group?
Response
No
Rationale
On some implementations, a user who is not listed as a member of a group may change to that group in the case that there is no password associated with the group.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, newgrp, DESCRIPTION.
Question 26: Are there any other implementation-specific authorisation restrictions that affect newgrp?
Response
Rationale
Some implementations may impose accounting or other restrictions that could cause newgrp to deny activity to a group member. For example, a resource quota system could be implemented on a group basis that would limit the ability to join a group until the resources were available to the group.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, newgrp, DESCRIPTION.
Question 27: What are the limits and default values used by nice and renice?
Response
| Maximum nice value |
|
| Minimum nice value |
|
| Default nice value |
|
Rationale
Each of these values differs between implementations and the range of values gives the user some control over the relative priority of processes.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, nice, DESCRIPTION.
Question 28: What is the default archive format used by pax?
Response
Rationale
The implementation has the choice as to which format it shall use as the default when it is creating files. When it is reading an archive created in either extended tar or extended cpio format (or any other format that it understands), the pax utility will read the archive in the format as written.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, pax, DESCRIPTION.
Question 29: How does pax handle reading and writing of archives that span multiple files?
Response
Rationale
In many cases pax will take actions, such as prompting the user for the device name to use for the next archive file, when the current archive file is full. There may be extensions to the syntax of pax which allow the user to specify the address to use to access subsequent files.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, pax, DESCRIPTION.
Question 30: How does pax handle invalid filenames when it is extracting files from an archive?
Response
Rationale
An implementation may either extract the data associated with these files into files named in an implementation-defined manner or may issue an error indicating that the file is being ignored. If pax extracts the file, it is necessary for the user either to be informed of the file that is used or to know the algorithm that pax uses in generating these filenames.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, pax, EXTENDED DESCRIPTION, The cpio Filename.
Question 31: Does printf support the e, E, f, g and G floating point conversion specifications?
Response
Yes
Rationale
The support of these conversions is optional.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, printf, EXAMPLES.
Question 32: Is the environment variable IFS ignored when the shell is invoked?
Response
Yes
Rationale
The specification allows that the sh command ignore the setting of the IFS environment variable on invocation. The setting of this variable has been used to breach security on systems which use the shell to interpret a call to the system() and execvp() interfaces.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, sh, ENVIRONMENT VARIABLES, IFS.
Question 33: What is the latest date after the Epoch that can be used by touch?
Response
19 January 2038 03:14:07 UCT
Rationale
Because of the limitations on the storage of times in the stat structure associated with a file, there is a limitation on the valid dates that can be specified to touch. This is directly related to the value that can be stored in the integral type time_t.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, touch, OPTIONS, -t.
Question 34: What are the limits of yacc's internal tables?
Response
| Description | Minimum Maximum | Implementation Maximum |
|---|---|---|
| Number of tokens | 126 | 3000 but MEMORY LIMITED |
| Number of non-terminals | 200 | 1000 but MEMORY LIMITED |
| Number of rules | 300 | 2000 but MEMORY LIMITED |
| Number of states | 600 | 5000 but MEMORY LIMITED |
| Length of rules | 5200 | 5200 but MEMORY LIMITED |
| Number of actions | 4000 | 70000 but MEMORY LIMITED |
Rationale
These internal table sizes vary between implementations and cannot be reset by the user. The specification gives the minimum maximum value for each of the table values.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, yacc, EXTENDED DESCRIPTION, Limits.
Question 35: What C-language programming environments are provided?
Response
| Programming Environment | Provided |
|---|---|
| The implementation provides a C-language programming environment with 32-bit int, long, pointer and off_t types. | Yes |
| The implementation provides a C-language programming environment with 32-bit int, long and pointer types and an off_t type using at least 64 bits. | Yes |
| The implementation provides a C-language programming environment with 32-bit int, and 64-bit long, pointer and off_t types. | Yes |
| The implementation provides a C-language programming environment with int using at least 32-bits, and long, pointer and off_t types using at least 64 bits. | Yes |
Rationale
Commands and Utilities, Issue 5 defines these scenarios as possible C-language programming environment offerings.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, c89,
Question 36: What C-language programming environment is the default?
Response
The implementation provides a C-language programming environment with
32-bit int, long, pointer and off_t types.
Rationale
Commands and Utilities, Issue 5 specifies that one of these must be supported as the default.
Reference
CAE Specification, Commands and Utilities, Issue 5, Chapter 3, Utilities, c89,
Copyright © 2002 International Business Machines Corporation
All rights reserved.
| Date | Name | Comment |
|---|---|---|
| 17-Apr-2002 | William L. Toth | Updated for DII-COE Certification. Changed AIX Version, HW test environment and added APAR information |
| 21-Sep-2001 | William L. Toth | Update for AIX 5L for POWER V5.1 9/2000 release |
| 23-Aug-2000 | William L. Toth | Updated for AIX 4.3.3, 10/2000 release for OEM users of AIX |
| 23-Jun-1998 | The Open Group | Key in Appendix Information |
| 10-May-1998 | William L. Toth | Removed appendix, to be sent to Open Group separately |
| 24-Feb-1998 | Mark S. Brown | New. Needs environment info. |
Copyright © 1998-2011 The Open Group. All Rights Reserved.The Open Group and Boundaryless Information Flow are trademarks and UNIX is a registered trademark of The Open Group in the United States and other countries. All other trademarks are the property of their respective owners.