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12-12-2000
Administrator
ACLs are a kernel (core build of the OS) extension and the way ACLs are implemented are dependent on the UNIX variety. Some UNIXes support ACLs, other do not. Please specify the kernel details of the UNIX you are running.
Quite a few years ago I was hanging with Linus and crew at the 1st Linux conference in Amsterdam. I pleaded with Linus to add ACLs and ACL event logging to the Linux kernel so my more security minded clients could run Linux. I am not sure if Linus ever added ACLs to the Linux kernel. He was dead-set against it many years ago (this was around 1994 so things might have changed).
I know HPUX has a very nice ACL system in the kernel. In fact, the HPUX ACLs are so good that many high-availability systems run HPUX for that reason. ACLs in HPUX can be set for things like kernel system calls, etc. The entire system can be set up to monitor and log system calls that the administrator deems necessary for security.
Systems that do not implement ACLs with a high degree of granularity are not normally used in high-assurance systems. (Let's don't get into defining 'high-assurance' in this thread, OK
)
[Edited by Neo on 12-13-2000 at 02:19 AM]
Quite a few years ago I was hanging with Linus and crew at the 1st Linux conference in Amsterdam. I pleaded with Linus to add ACLs and ACL event logging to the Linux kernel so my more security minded clients could run Linux. I am not sure if Linus ever added ACLs to the Linux kernel. He was dead-set against it many years ago (this was around 1994 so things might have changed).
I know HPUX has a very nice ACL system in the kernel. In fact, the HPUX ACLs are so good that many high-availability systems run HPUX for that reason. ACLs in HPUX can be set for things like kernel system calls, etc. The entire system can be set up to monitor and log system calls that the administrator deems necessary for security.
Systems that do not implement ACLs with a high degree of granularity are not normally used in high-assurance systems. (Let's don't get into defining 'high-assurance' in this thread, OK
)[Edited by Neo on 12-13-2000 at 02:19 AM]
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LEARN ABOUT SUSE
acl_cmp
ACL_CMP(3) BSD Library Functions Manual ACL_CMP(3) NAME
acl_cmp -- compare two ACLs LIBRARY
Linux Access Control Lists library (libacl, -lacl). SYNOPSIS
#include <sys/types.h> #include <acl/libacl.h> int acl_cmp(acl_t acl1, acl_t acl2); DESCRIPTION
The acl_cmp() function compares the ACLs pointed to by the arguments acl1 and acl2 for equality. The two ACLs are considered equal if for each entry in acl1 there is an entry in acl2 with matching tag type, qualifier, and permissions, and vice versa. RETURN VALUE
If successful, the acl_cmp() function returns 0 if the two ACLs acl1 and acl2 are equal, and 1 if they differ. Otherwise, the value -1 is returned and the global variable errno is set to indicate the error. ERRORS
If any of the following conditions occur, the acl_cmp() function returns -1 and sets errno to the corresponding value: [EINVAL] The argument acl1 is not a valid pointer to an ACL. The argument acl2 is not a valid pointer to an ACL. STANDARDS
This is a non-portable, Linux specific extension to the ACL manipulation functions defined in IEEE Std 1003.1e draft 17 ("POSIX.1e", aban- doned). SEE ALSO
acl(5) AUTHOR
Written by Andreas Gruenbacher <a.gruenbacher@bestbits.at>. Linux ACL March 23, 2002 Linux ACL