couple of getpwnam() questions

okuyamak at okuyamak at
Sat Nov 25 15:28:45 GMT 2000

I don't really know what is the "right" cases about
'Administorator's. But if I were....

>>>>> "GC" == Gerald Carter <gcarter at> writes:
GC> No one responded to this.  Should I threaten making 
GC> the change to issue #1 unless I hear differently?
GC> Does anyone depend on this behavior currently?

I don't even see the reason why current code uses this way.
Instead, I recommend using getpwent() function, take out each entry,
and do case insensitive match, or what ever match required.

# or, simply open the /etc/passwd file directly and look for
# entry.

I don't think 

>> o getpwnam("Administrator")
>> o getpwnam("administrator")
>> o getpwnam("ADMINISTRATOR")
>> o getpwnam("administratoR")
>> o getpwnam("AdministratoR")

are the only entries we should look at. There are chances like

 o getpwnam("aDministratOr")
 o getpwnam("adMinistraTor")
 o getpwnam("admInistrAtor")
 o getpwnam("admiNistRator")
 o getpwnam("adminIsTrator")
 o getpwnam("adminiStrator")

At least, getpwnam() will open(), close() and scan entire
/etc/passwd every time being called. This is large overhead, too
large. With 'getpwent() + case insensitive match', we only need
to scan once, though we might need more complex matching engine.

# We can always ask for regular express matching engine from GNU
# library. So even asking for regexp match is 'coding costy'.

best regards,
Kenichi Okuyama at Tokyo Research Lab. IBM-Japan, Co.

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