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Groups > comp.lang.c > #6905

Re: Query abt union

From Keith Thompson <kst-u@mib.org>
Newsgroups comp.lang.c
Subject Re: Query abt union
Date 2011-06-24 15:41 -0700
Organization None to speak of
Message-ID <lnboxmdf83.fsf@nuthaus.mib.org> (permalink)
References (2 earlier) <iu0g7a$b58$1@dont-email.me> <lnzkl8dqt2.fsf@nuthaus.mib.org> <iu2un1$ne7$1@nnrp.ngi.it> <lnk4cadhbs.fsf@nuthaus.mib.org> <iu3206$fsk$1@speranza.aioe.org>

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Edward Rutherford <edward.p.rutherford79@REMOVETHIS.gmail.com> writes:
> Keith Thompson wrote:
>> A function that is to strcpy() as strncat() is to strcat() would be
>> useful, and strncpy() would have been a good name for it. But there is
>> no such function in the standard library (thought it's easy enough to
>> roll your own), and the name strncpy() is already taken for this bizarre
>> thing.
>
> I think the function you're looking for is strlcpy(), present in most 
> modern C distributions but easy enough to write oneself should it be 
> absent. It helpfully returns the length of the source string, so you can 
> use constructions like
>
> if(strlcpy(buf, src, sizeof buf) >= sizeof buf) {
>   /* truncation happened */
> }

It's not necessarily what I'm looking for.  What I really had in mind
for what strncpy() *should* have been is a function that's to strcpy()
exactly as strncat() is to strcat().

(Note that strlcpy() may well be *better* than any of strcpy(),
strncpy(), or what-strncpy-should-have-been().)

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Nokia
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"

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Thread

Query abt union "sumit.sharma" <nospam@nospam.com> - 2011-06-23 20:07 +0000
  Re: Query abt union Ben Pfaff <blp@cs.stanford.edu> - 2011-06-23 13:18 -0700
  Re: Query abt union Shao Miller <sha0.miller@gmail.com> - 2011-06-23 17:20 -0500
    Re: Query abt union James Waldby <not@valid.invalid> - 2011-06-24 17:34 +0000
      Re: Query abt union Shao Miller <sha0.miller@gmail.com> - 2011-06-24 14:42 -0400
        Re: Query abt union James Waldby <not@valid.invalid> - 2011-06-24 21:13 +0000
          Re: Query abt union Shao Miller <sha0.miller@gmail.com> - 2011-06-26 14:08 -0500
            Re: Query abt union James Waldby <not@valid.invalid> - 2011-06-27 05:13 +0000
  Re: Query abt union John Gordon <gordon@panix.com> - 2011-06-23 22:27 +0000
  Re: Query abt union Lew Pitcher <lpitcher@teksavvy.com> - 2011-06-23 18:47 -0400
    Re: Query abt union Shao Miller <sha0.miller@gmail.com> - 2011-06-23 17:54 -0500
      Re: Query abt union Keith Thompson <kst-u@mib.org> - 2011-06-23 17:19 -0700
        Re: Query abt union Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-06-23 22:12 -0600
          Re: Query abt union Keith Thompson <kst-u@mib.org> - 2011-06-23 22:32 -0700
            Re: Query abt union Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-06-24 08:51 -0600
              Re: Query abt union Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-06-24 16:30 +0100
          Re: Query abt union pete <pfiland@mindspring.com> - 2011-06-24 12:46 -0400
            Re: Query abt union Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-06-24 16:18 -0600
        Re: Query abt union pozz <pozzugno@gmail.com> - 2011-06-24 23:14 +0200
          Re: Query abt union John Gordon <gordon@panix.com> - 2011-06-24 21:37 +0000
            Re: Query abt union Shao Miller <sha0.miller@gmail.com> - 2011-06-26 14:28 -0500
          Re: Query abt union Keith Thompson <kst-u@mib.org> - 2011-06-24 14:56 -0700
            Re: Query abt union Edward Rutherford <edward.p.rutherford79@REMOVETHIS.gmail.com> - 2011-06-24 22:10 +0000
              Re: Query abt union Keith Thompson <kst-u@mib.org> - 2011-06-24 15:41 -0700
          Re: Query abt union pete <pfiland@mindspring.com> - 2011-06-25 10:33 -0400
            Re: Query abt union pete <pfiland@mindspring.com> - 2011-06-25 15:30 -0400
          Re: Query abt union Shao Miller <sha0.miller@gmail.com> - 2011-06-26 14:12 -0500
    Re: Query abt union Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-06-23 17:13 -0600

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