freebsd-dev/usr.sbin/sysinstall/user.c
Jordan K. Hubbard 5214787fd5 OK, I've got two ideas to file in the "really seemed like a good idea
at the time, but on further reflection..." bucket with these changes.

1. Checking the media before frobbing the disks was a fine idea, and
   I wish it could have worked, but that leads to a rather difficult
   situation when you need to mount the media someplace and you're about
   to:

	a) Chroot away from your present root.
	b) Newfs the root to be.

   You're basically screwed since there's no place to stick the mount
   point where it will be found following the newfs/chroot (and eliminating
   the chroot in favor of just using the "root bias" feature would work
   great for the distributions but not the pkg_add calls done by the
   package installer).

2. Automatic timeout handling.  I don't know why, but alarm() frequently
   returns no residual even when the alarm didn't go off, which defies
   the man page but hey, since when was that so unusual?  Take out timeouts
   but retain the code which temporarily replaces the SIGINT handler in
   favor of a more media-specific handler.  This way, at least, if it's hanging
   you can at least whap it.  I think the timeout code would have been losing
   over *really slow* links anyway, so it's probably best that it go.

This should fix NFS, tape & CDROM installs again (serves me right for getting
complacent and using just the FTP installs in my testing).
1997-01-24 19:24:51 +00:00

727 lines
18 KiB
C

/*
* $FreeBSD$
*
* Copyright (c) 1996
* Jörg Wunsch. All rights reserved.
*
* The basic structure has been taken from tcpip.c, which is:
*
* Copyright (c) 1995
* Gary J Palmer. All rights reserved.
* Jordan K Hubbard. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* verbatim and that no modifications are made prior to this
* point in the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "sysinstall.h"
#include <utmp.h>
#include <ctype.h>
#include <sys/param.h>
#include <sysexits.h>
/* The help file for the user mgmt screen */
#define USER_HELPFILE "usermgmt"
/* XXX should they be moved out to sysinstall.h? */
#define GNAME_FIELD_LEN 32
#define GID_FIELD_LEN 10
#define GMEMB_FIELD_LEN 64
#define UID_FIELD_LEN 10
#define UGROUP_FIELD_LEN GNAME_FIELD_LEN
#define GECOS_FIELD_LEN 64
#define UMEMB_FIELD_LEN GMEMB_FIELD_LEN
#define HOMEDIR_FIELD_LEN 48
#define SHELL_FIELD_LEN 48
#define PASSWD_FIELD_LEN 32
/* These are nasty, but they make the layout structure a lot easier ... */
static char gname[GNAME_FIELD_LEN],
gid[GID_FIELD_LEN],
gmemb[GMEMB_FIELD_LEN],
uname[UT_NAMESIZE + 1],
passwd[PASSWD_FIELD_LEN],
uid[UID_FIELD_LEN],
ugroup[UGROUP_FIELD_LEN],
gecos[GECOS_FIELD_LEN],
umemb[UMEMB_FIELD_LEN],
homedir[HOMEDIR_FIELD_LEN],
shell[SHELL_FIELD_LEN];
#define CLEAR(v) memset(v, 0, sizeof v)
static int okbutton, cancelbutton;
/* What the screen size is meant to be */
#define USER_DIALOG_Y 0
#define USER_DIALOG_X 8
#define USER_DIALOG_WIDTH COLS - 16
#define USER_DIALOG_HEIGHT LINES - 2
/* The group configuration menu. */
static Layout groupLayout[] = {
#define LAYOUT_GNAME 0
{ 4, 10, 20, GNAME_FIELD_LEN - 1,
"Group name:", "The alphanumeric name of the new group (mandatory)",
gname, STRINGOBJ, NULL },
#define LAYOUT_GID 1
{ 4, 38, 10, GID_FIELD_LEN - 1,
"GID:", "The numerical ID for this group (leave blank for automatic choice)",
gid, STRINGOBJ, NULL },
#define LAYOUT_GMEMB 2
{ 11, 10, 40, GMEMB_FIELD_LEN - 1,
"Group members:", "Who belongs to this group (i.e., gets access rights for it)",
gmemb, STRINGOBJ, NULL },
#define LAYOUT_OKBUTTON 3
{ 18, 15, 0, 0,
"OK", "Select this if you are happy with these settings",
&okbutton, BUTTONOBJ, NULL },
#define LAYOUT_CANCELBUTTON 4
{ 18, 35, 0, 0,
"CANCEL", "Select this if you wish to cancel this screen",
&cancelbutton, BUTTONOBJ, NULL },
{ NULL },
};
/* The user configuration menu. */
static Layout userLayout[] = {
#define LAYOUT_UNAME 0
{ 3, 6, UT_NAMESIZE, UT_NAMESIZE + 1,
"Login ID:", "The login name of the new user (mandatory)",
uname, STRINGOBJ, NULL },
#define LAYOUT_UID 1
{ 3, 23, 8, UID_FIELD_LEN - 1,
"UID:", "The numerical ID for this user (leave blank for automatic choice)",
uid, STRINGOBJ, NULL },
#define LAYOUT_UGROUP 2
{ 3, 33, 8, UGROUP_FIELD_LEN - 1,
"Group:", "The login group name for this user (leave blank for automatic choice)",
ugroup, STRINGOBJ, NULL },
#define LAYOUT_PASSWD 3
{ 3, 43, 15, PASSWD_FIELD_LEN - 1,
"Password:", "The password for this user (enter this field with care!)",
passwd, STRINGOBJ, NULL },
#define LAYOUT_GECOS 4
{ 8, 6, 33, GECOS_FIELD_LEN - 1,
"Full name:", "The user's full name (comment)",
gecos, STRINGOBJ, NULL },
#define LAYOUT_UMEMB 5
{ 8, 43, 15, UMEMB_FIELD_LEN - 1,
"Member groups:", "The groups this user belongs to (i.e. gets access rights for)",
umemb, STRINGOBJ, NULL },
#define LAYOUT_HOMEDIR 6
{ 13, 6, 20, HOMEDIR_FIELD_LEN - 1,
"Home directory:", "The user's home directory (leave blank for default)",
homedir, STRINGOBJ, NULL },
#define LAYOUT_SHELL 7
{ 13, 29, 29, SHELL_FIELD_LEN - 1,
"Login shell:", "The user's login shell (leave blank for default)",
shell, STRINGOBJ, NULL },
#define LAYOUT_U_OKBUTTON 8
{ 18, 15, 0, 0,
"OK", "Select this if you are happy with these settings",
&okbutton, BUTTONOBJ, NULL },
#define LAYOUT_U_CANCELBUTTON 9
{ 18, 35, 0, 0,
"CANCEL", "Select this if you wish to cancel this screen",
&cancelbutton, BUTTONOBJ, NULL },
{ NULL },
};
/* whine */
static void
feepout(char *msg)
{
beep();
dialog_notify(msg);
}
/* Check for the settings on the screen. */
static int
verifyGroupSettings(void)
{
char tmp[256], *cp;
long lgid;
if (strlen(gname) == 0) {
feepout("The group name field must not be empty!");
return 0;
}
snprintf(tmp, 256, "pw group show -q -n %s > /dev/null", gname);
if (vsystem(tmp) == 0) {
feepout("This group name is already in use.");
return 0;
}
if (strlen(gid) > 0) {
lgid = strtol(gid, &cp, 10);
if (lgid < 0 || lgid >= 65536 || (*cp != '\0' && !isspace(*cp))) {
feepout("The GID must be a number between 1 and 65535.");
return 0;
}
}
if (strlen(gmemb) > 0) {
if (strpbrk(gmemb, " \t") != NULL) {
feepout("The group member list must not contain any whitespace;\n"
"use commas to separate the names.");
return 0;
}
#ifndef notyet /* XXX */
feepout("Sorry, the group member list feature\n"
"is currently not yet implemented.");
return 0;
#endif
}
return 1;
}
/*
* Ask pw(8) to fill in the blanks for us.
* Works solely on the global variables.
*/
static void
completeGroup(void)
{
int pfd[2], i;
char tmp[256], *cp;
ssize_t l;
size_t amnt;
pid_t pid;
char *vec[4] =
{
"pw", "group", "next", 0
};
pipe (pfd);
if ((pid = fork()) == 0)
{
/* The kiddy. */
dup2(pfd[1], 1);
dup2(pfd[1], 2);
for (i = getdtablesize(); i > 2; i--)
close(i);
execv("/usr/sbin/pw", vec);
msgDebug("Cannot execv() /usr/sbin/pw.\n");
_exit(99);
}
else
{
/* The oldie. */
close(pfd[1]);
amnt = sizeof tmp;
i = 0;
while((l = read(pfd[0], &tmp[i], amnt)) > 0)
{
amnt -= l;
i += l;
if (amnt == 0)
{
close(pfd[0]);
break;
}
}
close(pfd[0]);
tmp[i] = '\0';
waitpid(pid, &i, 0);
if (WIFSIGNALED(i) || WEXITSTATUS(i) != 0)
/* ignore by now */
return;
if ((cp = strchr(tmp, '\n')) != NULL)
*cp = '\0';
strncpy(gid, tmp, sizeof gid);
}
}
static void
addGroup(WINDOW *ds_win)
{
char tmp[256];
int pfd[2], i;
ssize_t l;
size_t amnt;
pid_t pid;
char *vec[8] =
{
"pw", "group", "add", "-n", 0, "-g", 0, 0
};
#define VEC_GNAME 4
#define VEC_GID 6
msgNotify("Adding group \"%s\"...", gname);
pipe (pfd);
if ((pid = fork()) == 0)
{
/* The kiddy. */
dup2(pfd[1], 1);
dup2(pfd[1], 2);
for (i = getdtablesize(); i > 2; i--)
close(i);
vec[VEC_GNAME] = gname;
if (strlen(gid) > 0)
vec[VEC_GID] = gid;
else
vec[VEC_GID - 1] = 0;
execv("/usr/sbin/pw", vec);
msgDebug("Cannot execv() /usr/sbin/pw.\n");
_exit(99);
}
else
{
/* The oldie. */
close(pfd[1]);
amnt = sizeof tmp;
i = 0;
while((l = read(pfd[0], &tmp[i], amnt)) > 0)
{
amnt -= l;
i += l;
if (amnt == 0)
{
close(pfd[0]);
break;
}
}
close(pfd[0]);
tmp[i] = '\0';
waitpid(pid, &i, 0);
if (WIFSIGNALED(i))
msgDebug("pw(8) exited with signal %d.\n", WTERMSIG(i));
else if(WEXITSTATUS(i))
{
i = 0;
if(strncmp(tmp, "pw: ", 4) == 0)
i = 4;
tmp[sizeof tmp - 1] = '\0'; /* sanity */
msgConfirm("The `pw' command exited with an error status.\n"
"Its error message was:\n\n%s",
&tmp[i]);
}
}
#undef VEC_GNAME
#undef VEC_GID
}
int
userAddGroup(dialogMenuItem *self)
{
WINDOW *ds_win, *save;
ComposeObj *obj = NULL;
int n = 0, cancel = FALSE, ret;
int max, firsttime = TRUE;
if (RunningAsInit && !strstr(variable_get(SYSTEM_STATE), "install")) {
msgConfirm("This option may only be used after the system is installed, sorry!");
return DITEM_FAILURE;
}
save = savescr();
dialog_clear_norefresh();
/* We need a curses window */
if (!(ds_win = openLayoutDialog(USER_HELPFILE, " User and Group Management ",
USER_DIALOG_X, USER_DIALOG_Y, USER_DIALOG_WIDTH, USER_DIALOG_HEIGHT))) {
beep();
msgConfirm("Cannot open addgroup dialog window!!");
return(DITEM_FAILURE);
}
/* Draw a group entry box */
draw_box(ds_win, USER_DIALOG_Y + 2, USER_DIALOG_X + 8, USER_DIALOG_HEIGHT - 8,
USER_DIALOG_WIDTH - 17, dialog_attr, border_attr);
wattrset(ds_win, dialog_attr);
mvwaddstr(ds_win, USER_DIALOG_Y + 2, USER_DIALOG_X + 22, " Add a new group ");
CLEAR(gname);
CLEAR(gid);
CLEAR(gmemb);
/* Some more initialisation before we go into the main input loop */
obj = initLayoutDialog(ds_win, groupLayout, USER_DIALOG_X, USER_DIALOG_Y, &max);
reenter:
cancelbutton = okbutton = 0;
while (layoutDialogLoop(ds_win, groupLayout, &obj, &n, max, &cancelbutton, &cancel)) {
if (firsttime && n == LAYOUT_GNAME) {
/* fill in the blanks, well, just the GID */
completeGroup();
RefreshStringObj(groupLayout[LAYOUT_GID].obj);
firsttime = FALSE;
}
}
if (!cancel && !verifyGroupSettings())
goto reenter;
/* Clear this crap off the screen */
dialog_clear_norefresh();
use_helpfile(NULL);
if (!cancel) {
addGroup(ds_win);
ret = DITEM_SUCCESS;
}
else
ret = DITEM_FAILURE;
restorescr(save);
return ret;
}
/* Check for the settings on the screen. */
static int
verifyUserSettings(WINDOW *ds_win)
{
char tmp[256], *cp;
long luid;
WINDOW *save;
int rv;
if (strlen(uname) == 0) {
feepout("The user name field must not be empty!");
return 0;
}
snprintf(tmp, 256, "pw user show -q -n %s > /dev/null", uname);
if (vsystem(tmp) == 0) {
feepout("This user name is already in use.");
return 0;
}
if (strlen(uid) > 0) {
luid = strtol(uid, &cp, 10);
if (luid < 0 || luid >= 65536 || (*cp != '\0' && !isspace(*cp))) {
feepout("The UID must be a number between 1 and 65535.");
return 0;
}
}
if (strlen(shell) > 0) {
while((cp = getusershell()) != NULL)
if (strcmp(cp, shell) == 0)
break;
endusershell();
if (cp == NULL) {
save = savescr();
rv = msgYesNo("Warning:\n\n"
"The requested shell \"%s\" is not\n"
"a valid user shell.\n\n"
"Use it anyway?\n", shell);
restorescr(save);
wrefresh(ds_win);
if (rv != DITEM_SUCCESS)
return 0;
}
}
if (strlen(umemb) > 0) {
if (strpbrk(umemb, " \t") != NULL) {
feepout("The member groups list must not contain any whitespace;\n"
"use commas to separate the names.");
return 0;
}
}
return 1;
}
/*
* Ask pw(8) to fill in the blanks for us.
* Works solely on the global variables.
*/
static void
completeUser(void)
{
int pfd[2], i;
char tmp[256], *cp, *cp2;
ssize_t l;
size_t amnt;
pid_t pid;
char *vec[7] =
{
"pw", "user", "add", "-N", "-n", 0, 0
};
#define VEC_UNAME 5
pipe (pfd);
if ((pid = fork()) == 0)
{
/* The kiddy. */
dup2(pfd[1], 1);
dup2(pfd[1], 2);
for (i = getdtablesize(); i > 2; i--)
close(i);
vec[VEC_UNAME] = uname;
execv("/usr/sbin/pw", vec);
msgDebug("Cannot execv() /usr/sbin/pw.\n");
_exit(99);
}
else
{
/* The oldie. */
close(pfd[1]);
amnt = sizeof tmp;
i = 0;
while((l = read(pfd[0], &tmp[i], amnt)) > 0)
{
amnt -= l;
i += l;
if (amnt == 0)
{
close(pfd[0]);
break;
}
}
close(pfd[0]);
tmp[i] = '\0';
waitpid(pid, &i, 0);
if (WIFSIGNALED(i) || WEXITSTATUS(i) != 0)
/* ignore by now */
return;
if ((cp = strchr(tmp, '\n')) != NULL)
*cp = '\0';
if ((cp = strchr(tmp, ':')) == NULL || (cp = strchr(++cp, ':')) == NULL)
return;
cp++;
if ((cp2 = strchr(cp, ':')) == NULL)
return;
*cp2++ = '\0';
strncpy(uid, cp, sizeof uid);
cp = cp2;
if ((cp2 = strchr(cp, ':')) == NULL)
return;
*cp2++ = '\0';
#ifdef notyet /* XXX pw user add -g doesn't accept a numerical GID */
strncpy(ugroup, cp, sizeof ugroup);
#endif
cp = cp2;
if ((cp2 = strchr(cp, ':')) == NULL || (cp2 = strchr(++cp2, ':')) == NULL ||
(cp = cp2 = strchr(++cp2, ':')) == NULL || (cp2 = strchr(++cp2, ':')) == NULL)
return;
*cp2++ = '\0';
cp++;
strncpy(gecos, cp, sizeof gecos);
cp = cp2;
if ((cp2 = strchr(cp, ':')) == NULL)
return;
*cp2++ = '\0';
strncpy(homedir, cp, sizeof homedir);
if (*cp2)
strncpy(shell, cp2, sizeof shell);
}
#undef VEC_UNAME
}
static void
addUser(WINDOW *ds_win)
{
char tmp[256], *msg;
int pfd[2], ipfd[2], i, j;
ssize_t l;
size_t amnt;
pid_t pid;
/*
* Maximal list:
* pw user add -m -n uname -g grp -u uid -c comment -d homedir -s shell -G grplist -h 0
*/
char *vec[21] =
{
"pw", "user", "add", "-m", "-n", /* ... */
};
#define VEC_UNAME 5
msgNotify("Adding user \"%s\"...", uname);
pipe (pfd);
pipe (ipfd);
if ((pid = fork()) == 0)
{
/* The kiddy. */
dup2(ipfd[0], 0);
dup2(pfd[1], 1);
dup2(pfd[1], 2);
for (i = getdtablesize(); i > 2; i--)
close(i);
vec[i = VEC_UNAME] = uname;
i++;
#define ADDVEC(var, option) do { if (strlen(var) > 0) { vec[i++] = option; vec[i++] = var; } } while (0)
ADDVEC(ugroup, "-g");
ADDVEC(uid, "-u");
ADDVEC(gecos, "-c");
ADDVEC(homedir, "-d");
ADDVEC(shell, "-s");
ADDVEC(umemb, "-G");
if (passwd[0]) {
vec[i++] = "-h";
vec[i++] = "0";
}
vec[i] = 0;
execv("/usr/sbin/pw", vec);
msgDebug("Cannot execv() /usr/sbin/pw.\n");
_exit(99);
}
else
{
/* The oldie. */
close(pfd[1]);
close(ipfd[0]);
if (passwd[0])
write(ipfd[1], passwd, strlen(passwd));
close(ipfd[1]);
amnt = sizeof tmp;
i = 0;
while((l = read(pfd[0], &tmp[i], amnt)) > 0)
{
amnt -= l;
i += l;
if (amnt == 0)
{
close(pfd[0]);
break;
}
}
close(pfd[0]);
tmp[i] = '\0';
waitpid(pid, &i, 0);
if (WIFSIGNALED(i))
{
j = WTERMSIG(i);
msg = "The `pw' command exited with signal %d.\n";
goto sysfail;
}
else if((j = WEXITSTATUS(i)))
{
i = 0;
if(strncmp(tmp, "pw: ", 4) == 0)
i = 4;
tmp[sizeof tmp - 1] = '\0'; /* sanity */
if (j == EX_DATAERR || j == EX_NOUSER || j == EX_SOFTWARE)
msgConfirm("The `pw' command exited with an error status.\n"
"Its error message was:\n\n%s",
&tmp[i]);
else
{
msg = "The `pw' command exited with unexpected status %d.\n";
sysfail:
msgDebug(msg, j);
msgDebug("Command stdout and stderr was:\n\n%s", tmp);
msgConfirm(msg, j);
}
}
else if (!passwd[0])
msgConfirm("You will need to enter a password for this user\n"
"later, using the passwd(1) command from the shell.\n\n"
"The account for `%s' is currently still disabled.",
uname);
}
#undef VEC_UNAME
#undef ADDVEC
}
int
userAddUser(dialogMenuItem *self)
{
WINDOW *ds_win, *save;
ComposeObj *obj = NULL;
int n = 0, cancel = FALSE, ret;
int max, firsttime = TRUE;
if (RunningAsInit && !strstr(variable_get(SYSTEM_STATE), "install")) {
msgConfirm("This option may only be used after the system is installed, sorry!");
return DITEM_FAILURE;
}
save = savescr();
dialog_clear_norefresh();
/* We need a curses window */
if (!(ds_win = openLayoutDialog(USER_HELPFILE, " User and Group Management ",
USER_DIALOG_X, USER_DIALOG_Y, USER_DIALOG_WIDTH, USER_DIALOG_HEIGHT))) {
beep();
msgConfirm("Cannot open adduser dialog window!!");
return(DITEM_FAILURE);
}
/* Draw a user entry box */
draw_box(ds_win, USER_DIALOG_Y + 1, USER_DIALOG_X + 3, USER_DIALOG_HEIGHT - 6,
USER_DIALOG_WIDTH - 6, dialog_attr, border_attr);
wattrset(ds_win, dialog_attr);
mvwaddstr(ds_win, USER_DIALOG_Y + 1, USER_DIALOG_X + 22, " Add a new user ");
CLEAR(uname);
CLEAR(uid);
CLEAR(ugroup);
CLEAR(gecos);
CLEAR(passwd);
CLEAR(umemb);
CLEAR(homedir);
CLEAR(shell);
/* Some more initialisation before we go into the main input loop */
obj = initLayoutDialog(ds_win, userLayout, USER_DIALOG_X, USER_DIALOG_Y, &max);
reenter:
cancelbutton = okbutton = 0;
while (layoutDialogLoop(ds_win, userLayout, &obj, &n, max, &cancelbutton, &cancel)) {
if (firsttime && n == LAYOUT_UNAME) {
/* fill in the blanks, well, just the GID */
completeUser();
RefreshStringObj(userLayout[LAYOUT_UID].obj);
RefreshStringObj(userLayout[LAYOUT_UGROUP].obj);
RefreshStringObj(userLayout[LAYOUT_GECOS].obj);
RefreshStringObj(userLayout[LAYOUT_UMEMB].obj);
RefreshStringObj(userLayout[LAYOUT_HOMEDIR].obj);
RefreshStringObj(userLayout[LAYOUT_SHELL].obj);
firsttime = FALSE;
}
}
if (!cancel && !verifyUserSettings(ds_win))
goto reenter;
/* Clear this crap off the screen */
dialog_clear_norefresh();
use_helpfile(NULL);
if (!cancel) {
addUser(ds_win);
ret = DITEM_SUCCESS;
}
else
ret = DITEM_FAILURE;
restorescr(save);
return ret;
}