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Sprite 1984 - 1993
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initgroups.c
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C/C++ Source or Header
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1989-07-21
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1KB
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51 lines
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)initgroups.c 5.3 (Berkeley) 4/27/86";
#endif LIBC_SCCS and not lint
/*
* initgroups
*/
#include <stdio.h>
#include <sys/param.h>
#include <grp.h>
struct group *getgrent();
initgroups(uname, agroup)
char *uname;
int agroup;
{
int groups[NGROUPS], ngroups = 0;
register struct group *grp;
register int i;
if (agroup >= 0)
groups[ngroups++] = agroup;
setgrent();
while (grp = getgrent()) {
if (grp->gr_gid == agroup)
continue;
for (i = 0; grp->gr_mem[i]; i++)
if (!strcmp(grp->gr_mem[i], uname)) {
if (ngroups == NGROUPS) {
fprintf(stderr, "initgroups: %s is in too many groups\n", uname);
goto toomany;
}
groups[ngroups++] = grp->gr_gid;
}
}
toomany:
endgrent();
if (setgroups(ngroups, groups) < 0) {
perror("setgroups");
return (-1);
}
return (0);
}