audit(4): Add tests for all audit events of open(2) and openat(2)

[aniketp]

Summary

The following changes introduce a new test-program open, which contains the tests for
open(2) and openat(2) system calls in various opening mode:

• 72:AUE_OPEN_R:open(2) - read:fr
• 73:AUE_OPEN_RC:open(2) - read,creat:fc,fr,fa,fm
• 74:AUE_OPEN_RT:open(2) - read,trunc:fd,fr,fa,fm
• 75:AUE_OPEN_RTC:open(2) - read,creat,trunc:fc,fd,fr,fa,fm
• 76:AUE_OPEN_W:open(2) - write:fw
• 77:AUE_OPEN_WC:open(2) - write,creat:fc,fw,fa,fm
• 78:AUE_OPEN_WT:open(2) - write,trunc:fd,fw,fa,fm
• 79:AUE_OPEN_WTC:open(2) - write,creat,trunc:fc,fd,fw,fa,fm
• 80:AUE_OPEN_RW:open(2) - read,write:fr,fw
• 81:AUE_OPEN_RWC:open(2) - read,write,creat:fc,fw,fr,fa,fm
• 82:AUE_OPEN_RWT:open(2) - read,write,trunc:fd,fr,fw,fa,fm
• 83:AUE_OPEN_RWTC:open(2) - read,write,creat,trunc:fc,fd,fw,fr,fa,fm

Similarly for openat(2) as well:

• 270:AUE_OPENAT_R:openat(2) - read:fr
• 271:AUE_OPENAT_RC:openat(2) - read,creat:fc,fr,fa,fm
• 272:AUE_OPENAT_RT:openat(2) - read,trunc:fd,fr,fa,fm
• 273:AUE_OPENAT_RTC:openat(2) - read,creat,trunc:fc,fd,fr,fa,fm
• 274:AUE_OPENAT_W:openat(2) - write:fw
• 275:AUE_OPENAT_WC:openat(2) - write,creat:fc,fw,fa,fm
• 276:AUE_OPENAT_WT:openat(2) - write,trunc:fd,fw,fa,fm
• 277:AUE_OPENAT_WTC:openat(2) - write,creat,trunc:fc,fd,fw,fa,fm
• 278:AUE_OPENAT_RW:openat(2) - read,write:fr,fw
• 279:AUE_OPENAT_RWC:openat(2) - read,write,create:fc,fw,fr,fa,fm
• 280:AUE_OPENAT_RWT:openat(2) - read,write,trunc:fd,fw,fr,fa,fm
• 281:AUE_OPENAT_RWTC:openat(2) - read,write,creat,trunc:fc,fd,fw,fr,fa,fm

Note: Testing all possible combinations of audit events in success and failure mode of
open(2) and openat(2) would have required 192 test cases. In order to limit the number
test-cases and test only the most important aspects, the audit classes have been restricted
to fr and fw only.

Test Plan

Execute make && make install from test/sys/audit.
Execute kyua test from /usr/tests/sys/audit. All testcases should succeed.

[aniketp]

• Add the missing open.c source file

[asomers]

It looks ok, but it's incredibly repetitive. Do you think you could find a way to simplify it? One way would be to write macros to generate the individual test cases. libexec/tftpd/tests/functional.c takes that approach.

[aniketp]

• Update the test program to use macros for generating test cases

[asomers]

What happened to matching strings like read,create in the regex?

[aniketp]

• Include the specific regexes for individual audit events

[aniketp]

• Formatting corrections

[aniketp]

• Correct the format specifier of flag in test case description

No functional change

[asomers]

tests/sys/audit/open.c

67 ↗

(On Diff #43327)

Printing the flags in hex isn't very helpful. Can you print them symbolically instead? Displaying them in ORed form should be fine.

[aniketp]

Stringify the 'flag' macro argument using # preprocessing operator

[asomers]

tests/sys/audit/open.c

67 ↗

(On Diff #43327)

They're displayed correctly now, but the grammer is off. How about "... call with flags = %s" ?

[aniketp]

Update the test case description format