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Change euid while reading the user's .login_cap file in case the homedir

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is on a NFS partion without root read access.  Also, flip euid again for
the duration of the chdir() to the homedir for the same reason.

PR: 5145
Submitted by: Joel.Faedi@esial.u-nancy.fr
Also tested by: A Joseph Koshy <koshy@india.hp.com>
This commit is contained in:
Peter Wemm 1998-04-30 16:48:20 +00:00
parent d1793ae420
commit 159da44105
1 changed files with 8 additions and 2 deletions
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10
usr.bin/login/login.c
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@ -42,7 +42,7 @@ static char copyright[] =
static char sccsid[] = "@(#)login.c 8.4 (Berkeley) 4/2/94";
#endif
static const char rcsid[] =
"$Id: login.c,v 1.31 1998/02/05 18:37:02 guido Exp $";
"$Id: login.c,v 1.32 1998/02/13 21:02:53 ache Exp $";
#endif /* not lint */
/*
@ -157,7 +157,7 @@ main(argc, argv)
int ask, ch, cnt, fflag, hflag, pflag, quietlog, rootlogin, rval;
int changepass;
time_t warntime;
uid_t uid;
uid_t uid, eiud;
char *domain, *p, *ep, *salt, *ttyn;
char tbuf[MAXPATHLEN + 2], tname[sizeof(_PATH_TTY) + 10];
char localhost[MAXHOSTNAMELEN];
@ -199,6 +199,7 @@ main(argc, argv)
fflag = hflag = pflag = 0;
uid = getuid();
euid = geteuid();
while ((ch = getopt(argc, argv, "fh:p")) != -1)
switch (ch) {
case 'f':
@ -336,7 +337,10 @@ main(argc, argv)
* within the next block. pwd can be NULL since it
* falls back to the "default" class if it is.
*/
if (pwd != NULL)
(void)seteuid(rootlogin ? 0 : pwd->pw_uid);
lc = login_getpwclass(pwd);
seteuid(euid);
#endif /* LOGIN_CAP */
/*
@ -541,6 +545,7 @@ main(argc, argv)
#else
quietlog = 0;
#endif
(void)seteuid(rootlogin ? 0 : pwd->pw_uid);
if (!*pwd->pw_dir || chdir(pwd->pw_dir) < 0) {
#ifdef LOGIN_CAP
if (login_getcapbool(lc, "requirehome", 0))
@ -552,6 +557,7 @@ main(argc, argv)
if (!quietlog || *pwd->pw_dir)
printf("No home directory.\nLogging in with home = \"/\".\n");
}
(void)seteuid(euid);
if (!quietlog)
quietlog = access(_PATH_HUSHLOGIN, F_OK) == 0;