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/*
* This file is part of the sn package.
* Distribution of sn is covered by the GNU GPL. See file COPYING.
* Copyright 1998-2000 Harold Tay.
* Copyright 2000- Patrik Rdman.
*/
#include <unistd.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <out.h>
#include <pwd.h>
#include <grp.h>
#include <string.h>
static const char rcsid[] = "$Id$";
char *snroot = SNROOT;
uid_t snuid;
uid_t sngid;
void parameters (int wantwriteperms)
{
struct stat st;
if (!(snroot = getenv("SNROOT")))
snroot = SNROOT;
if (-1 == stat(snroot, &st))
fail(2, "Can't find \"%s\":%m");
if (!S_ISDIR(st.st_mode))
fail(2, "%s is not a directory");
snuid = st.st_uid;
sngid = st.st_gid;
if (0 == geteuid())
{
setgid(sngid);
setuid(snuid);
}
if (wantwriteperms)
if (snuid != geteuid() || sngid != getegid())
{
char euid_name[10], egid_name[10];
strncpy(euid_name, (getpwuid(geteuid()))->pw_name, 10);
strncpy(egid_name, (getgrgid(getegid()))->gr_name, 10);
fail(2, "Can't write in %s (I am %s.%s, must be %s.%s)", snroot,
euid_name, egid_name, (getpwuid(snuid))->pw_name, (getgrgid(sngid))->gr_name);
}
}
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