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Re: Calling properly getpwuid_r
- From: Siddhesh Poyarekar <siddhesh dot poyarekar at gmail dot com>
- To: Thomas Segismont <tsegismo at redhat dot com>
- Cc: libc-help at sourceware dot org
- Date: Tue, 12 Feb 2013 21:17:40 +0530
- Subject: Re: Calling properly getpwuid_r
- References: <511A62AA.8020801@redhat.com>
On 12 February 2013 21:11, Thomas Segismont <tsegismo@redhat.com> wrote:
> On the libc manual, there is an example on how to call gethostbyname_r:
> http://www.gnu.org/software/libc/manual/html_node/Host-Names.html
>
> As getpwuid_r seems to be backed by the same code in getXXbyYY_r.c, is it
> also recommended to call it in a while loop to deal with erange errors?
Yes.
> Is there a particular reason for this?
The string fields in the struct paswd returned are stored in the
caller-supplied buffer. The call will return ERANGE if the buffer is
not large enough.
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