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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>
#include "config.h"
static const char ver_ctrl_id[] = "$Id: parameters.c 29 2004-04-24 23:02:38Z patrik $";
char *snroot = SNROOT;
uid_t snuid;
gid_t sngid;
void parameters (bool wantwriteperms)
{
struct stat st;
if (!(snroot = getenv("SNROOT")))
snroot = SNROOT;
if (-1 == stat(snroot, &st))
fail(2, "Can't find spool directory \"%s\":%m", snroot);
if (!S_ISDIR(st.st_mode))
fail(2, "\"%s\" is not a directory", snroot);
snuid = st.st_uid;
sngid = st.st_gid;
if (0 == geteuid())
{
setgid(sngid);
setuid(snuid);
}
if (wantwriteperms)
if (snuid != geteuid() || sngid != getegid())
{
struct passwd *pwuid;
struct group *grgid;
char euid_name[40], egid_name[40];
char snuid_name[40], sngid_name[40];
pwuid = getpwuid(geteuid());
grgid = getgrgid(getegid());
strncpy(euid_name, (pwuid ? pwuid->pw_name : "(unknown)"), 40);
strncpy(egid_name, (grgid ? grgid->gr_name : "(unknown)"), 40);
pwuid = getpwuid(snuid);
grgid = getgrgid(sngid);
strncpy(snuid_name, (pwuid ? pwuid->pw_name : "(unknown)"), 40);
strncpy(sngid_name, (grgid ? grgid->gr_name : "(unknown)"), 40);
fail(2, "Can't write in spool directory \"%s\" (I am %s:%s, must be %s:%s)",
snroot, euid_name, egid_name, snuid_name, sngid_name);
}
}
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