John Summerfield wrote:
>
> I have a code fragment:
> struct group *grp = getgrnam(group.data());
> if (grp == NULL)
> {
> int E=errno;
> cerr << "error=" << E << ": " << strerror(E) << " " <<
>ENOMEM<< endl;;
> cerr << "group " << group << " is unknown on this system."
><< endl;
> err=max(1,err);
> }
> else
> {
> gid = grp->gr_gid;
> }
I tried it using C, and it worked fine.
-------------
#include <stdio.h>
#include <string.h>
#include <grp.h>
#include <sys/types.h>
#include <errno.h>
main ( int argv, char *argc[])
{
struct group *grp;
char *gum;
gum=argc[1];
grp=getgrnam(gum);
if (grp == NULL)
{
printf("error %d : %s \n", errno, strerror(errno));
printf(" group %s\n", gum);
}
else
printf ("group %s : gid %d\n",gum, grp->gr_gid);
}
---------------
This returned the correct results for /etc/group
and the NIS group entries.
What does group.data() return?
Is it a char* or a C++ string?
Is there an auto cast for this?
In the error message you use group
as the string. should you i]use it instead of
the data() method?
-Thomas
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