static uid_t
pw_uidpolicy(struct userconf * cnf, struct cargs * args)
{
struct passwd *pwd;
uid_t uid = (uid_t) - 1;
struct carg *a_uid = getarg(args, 'u');
/*
* Check the given uid, if any
*/
if (a_uid != NULL) {
uid = (uid_t) atol(a_uid->val);
if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL)
errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid);
} else {
struct bitmap bm;
/*
* We need to allocate the next available uid under one of
* two policies a) Grab the first unused uid b) Grab the
* highest possible unused uid
*/
if (cnf->min_uid >= cnf->max_uid) { /* Sanity
* claus^H^H^H^Hheck */
cnf->min_uid = 1000;
cnf->max_uid = 32000;
}
bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
/*
* Now, let's fill the bitmap from the password file
*/
SETPWENT();
while ((pwd = GETPWENT()) != NULL)
if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid)
bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
ENDPWENT();
/*
* Then apply the policy, with fallback to reuse if necessary
*/
if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
/*
* Another sanity check
*/
if (uid < cnf->min_uid || uid > cnf->max_uid)
errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used");
bm_dealloc(&bm);
}
return uid;
}
int
pw_user(struct userconf * cnf, int mode, struct cargs * args)
{
int rc, edited = 0;
char *p = NULL;
char *passtmp;
struct carg *a_name;
struct carg *a_uid;
struct carg *arg;
struct passwd *pwd = NULL;
struct group *grp;
struct stat st;
char line[_PASSWORD_LEN+1];
FILE *fp;
char *dmode_c;
void *set = NULL;
static struct passwd fakeuser =
{
NULL,
"*",
-1,
-1,
0,
"",
"User &",
"/nonexistent",
"/bin/sh",
0
#if defined(__FreeBSD__)
,0
#endif
};
/*
* With M_NEXT, we only need to return the
* next uid to stdout
*/
if (mode == M_NEXT)
{
uid_t next = pw_uidpolicy(cnf, args);
if (getarg(args, 'q'))
return next;
printf("%ld:", (long)next);
pw_group(cnf, mode, args);
return EXIT_SUCCESS;
}
/*
* We can do all of the common legwork here
*/
if ((arg = getarg(args, 'b')) != NULL) {
cnf->home = arg->val;
}
if ((arg = getarg(args, 'M')) != NULL) {
dmode_c = arg->val;
if ((set = setmode(dmode_c)) == NULL)
errx(EX_DATAERR, "invalid directory creation mode '%s'",
dmode_c);
cnf->homemode = getmode(set, _DEF_DIRMODE);
free(set);
}
/*
* If we'll need to use it or we're updating it,
* then create the base home directory if necessary
*/
if (arg != NULL || getarg(args, 'm') != NULL) {
int l = strlen(cnf->home);
if (l > 1 && cnf->home[l-1] == '/') /* Shave off any trailing path delimiter */
cnf->home[--l] = '\0';
if (l < 2 || *cnf->home != '/') /* Check for absolute path name */
errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home);
if (stat(cnf->home, &st) == -1) {
char dbuf[MAXPATHLEN];
/*
* This is a kludge especially for Joerg :)
* If the home directory would be created in the root partition, then
* we really create it under /usr which is likely to have more space.
* But we create a symlink from cnf->home -> "/usr" -> cnf->home
*/
if (strchr(cnf->home+1, '/') == NULL) {
strcpy(dbuf, "/usr");
strncat(dbuf, cnf->home, MAXPATHLEN-5);
if (mkdir(dbuf, _DEF_DIRMODE) != -1 || errno == EEXIST) {
chown(dbuf, 0, 0);
/*
* Skip first "/" and create symlink:
* /home -> usr/home
*/
symlink(dbuf+1, cnf->home);
}
/* If this falls, fall back to old method */
}
strlcpy(dbuf, cnf->home, sizeof(dbuf));
p = dbuf;
if (stat(dbuf, &st) == -1) {
while ((p = strchr(p + 1, '/')) != NULL) {
*p = '\0';
if (stat(dbuf, &st) == -1) {
if (mkdir(dbuf, _DEF_DIRMODE) == -1)
goto direrr;
chown(dbuf, 0, 0);
} else if (!S_ISDIR(st.st_mode))
errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf);
*p = '/';
}
}
if (stat(dbuf, &st) == -1) {
if (mkdir(dbuf, _DEF_DIRMODE) == -1) {
direrr: err(EX_OSFILE, "mkdir '%s'", dbuf);
}
chown(dbuf, 0, 0);
}
} else if (!S_ISDIR(st.st_mode))
errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home);
}
if ((arg = getarg(args, 'e')) != NULL)
cnf->expire_days = atoi(arg->val);
if ((arg = getarg(args, 'y')) != NULL)
cnf->nispasswd = arg->val;
if ((arg = getarg(args, 'p')) != NULL && arg->val)
cnf->password_days = atoi(arg->val);
if ((arg = getarg(args, 'g')) != NULL) {
if (!*(p = arg->val)) /* Handle empty group list specially */
cnf->default_group = "";
else {
if ((grp = GETGRNAM(p)) == NULL) {
if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
errx(EX_NOUSER, "group `%s' does not exist", p);
}
cnf->default_group = newstr(grp->gr_name);
}
}
if ((arg = getarg(args, 'L')) != NULL)
cnf->default_class = pw_checkname((u_char *)arg->val, 0);
if ((arg = getarg(args, 'G')) != NULL && arg->val) {
int i = 0;
for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
if ((grp = GETGRNAM(p)) == NULL) {
if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
errx(EX_NOUSER, "group `%s' does not exist", p);
}
if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1)
cnf->groups[i++] = newstr(grp->gr_name);
}
while (i < cnf->numgroups)
cnf->groups[i++] = NULL;
}
if ((arg = getarg(args, 'k')) != NULL) {
if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode))
errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir);
}
if ((arg = getarg(args, 's')) != NULL)
cnf->shell_default = arg->val;
if ((arg = getarg(args, 'w')) != NULL)
cnf->default_password = boolean_val(arg->val, cnf->default_password);
if (mode == M_ADD && getarg(args, 'D')) {
if (getarg(args, 'n') != NULL)
errx(EX_DATAERR, "can't combine `-D' with `-n name'");
if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
if ((cnf->min_uid = (uid_t) atoi(p)) == 0)
cnf->min_uid = 1000;
if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid)
cnf->max_uid = 32000;
}
if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
if ((cnf->min_gid = (gid_t) atoi(p)) == 0)
cnf->min_gid = 1000;
if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid)
cnf->max_gid = 32000;
}
arg = getarg(args, 'C');
if (write_userconfig(arg ? arg->val : NULL))
return EXIT_SUCCESS;
warn("config update");
return EX_IOERR;
}
if (mode == M_PRINT && getarg(args, 'a')) {
int pretty = getarg(args, 'P') != NULL;
int v7 = getarg(args, '7') != NULL;
SETPWENT();
while ((pwd = GETPWENT()) != NULL)
print_user(pwd, pretty, v7);
ENDPWENT();
return EXIT_SUCCESS;
}
if ((a_name = getarg(args, 'n')) != NULL)
pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0));
a_uid = getarg(args, 'u');
if (a_uid == NULL) {
if (a_name == NULL)
errx(EX_DATAERR, "user name or id required");
/*
* Determine whether 'n' switch is name or uid - we don't
* really don't really care which we have, but we need to
* know.
*/
if (mode != M_ADD && pwd == NULL
&& strspn(a_name->val, "0123456789") == strlen(a_name->val)
&& *a_name->val) {
(a_uid = a_name)->ch = 'u';
a_name = NULL;
}
}
/*
* Update, delete & print require that the user exists
*/
if (mode == M_UPDATE || mode == M_DELETE ||
mode == M_PRINT || mode == M_LOCK || mode == M_UNLOCK) {
if (a_name == NULL && pwd == NULL) /* Try harder */
pwd = GETPWUID(atoi(a_uid->val));
if (pwd == NULL) {
if (mode == M_PRINT && getarg(args, 'F')) {
fakeuser.pw_name = a_name ? a_name->val : "nouser";
fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1;
return print_user(&fakeuser,
getarg(args, 'P') != NULL,
getarg(args, '7') != NULL);
}
if (a_name == NULL)
errx(EX_NOUSER, "no such uid `%s'", a_uid->val);
errx(EX_NOUSER, "no such user `%s'", a_name->val);
}
if (a_name == NULL) /* May be needed later */
a_name = addarg(args, 'n', newstr(pwd->pw_name));
/*
* The M_LOCK and M_UNLOCK functions simply add or remove
* a "*LOCKED*" prefix from in front of the password to
* prevent it decoding correctly, and therefore prevents
* access. Of course, this only prevents access via
* password authentication (not ssh, kerberos or any
* other method that does not use the UNIX password) but
* that is a known limitation.
*/
if (mode == M_LOCK) {
if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0)
errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name);
passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str));
if (passtmp == NULL) /* disaster */
errx(EX_UNAVAILABLE, "out of memory");
strcpy(passtmp, locked_str);
strcat(passtmp, pwd->pw_passwd);
pwd->pw_passwd = passtmp;
edited = 1;
} else if (mode == M_UNLOCK) {
if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0)
errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name);
pwd->pw_passwd += sizeof(locked_str)-1;
edited = 1;
} else if (mode == M_DELETE) {
/*
* Handle deletions now
*/
char file[MAXPATHLEN];
char home[MAXPATHLEN];
uid_t uid = pwd->pw_uid;
struct group *gr;
char grname[LOGNAMESIZE];
if (strcmp(pwd->pw_name, "root") == 0)
errx(EX_DATAERR, "cannot remove user 'root'");
if (!PWALTDIR()) {
/*
* Remove opie record from /etc/opiekeys
*/
rmopie(pwd->pw_name);
/*
* Remove crontabs
*/
snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name);
if (access(file, F_OK) == 0) {
sprintf(file, "crontab -u %s -r", pwd->pw_name);
system(file);
}
}
/*
* Save these for later, since contents of pwd may be
* invalidated by deletion
*/
sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
strlcpy(home, pwd->pw_dir, sizeof(home));
gr = GETGRGID(pwd->pw_gid);
if (gr != NULL)
strlcpy(grname, gr->gr_name, LOGNAMESIZE);
else
grname[0] = '\0';
rc = delpwent(pwd);
if (rc == -1)
err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
else if (rc != 0) {
warn("passwd update");
return EX_IOERR;
}
if (cnf->nispasswd && *cnf->nispasswd=='/') {
rc = delnispwent(cnf->nispasswd, a_name->val);
if (rc == -1)
warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name);
else if (rc != 0)
warn("WARNING: NIS passwd update");
/* non-fatal */
}
grp = GETGRNAM(a_name->val);
if (grp != NULL &&
(grp->gr_mem == NULL || *grp->gr_mem == NULL) &&
strcmp(a_name->val, grname) == 0)
delgrent(GETGRNAM(a_name->val));
SETGRENT();
while ((grp = GETGRENT()) != NULL) {
int i, j;
char group[MAXLOGNAME];
if (grp->gr_mem != NULL) {
for (i = 0; grp->gr_mem[i] != NULL; i++) {
if (!strcmp(grp->gr_mem[i], a_name->val)) {
for (j = i; grp->gr_mem[j] != NULL; j++)
grp->gr_mem[j] = grp->gr_mem[j+1];
strlcpy(group, grp->gr_name, MAXLOGNAME);
chggrent(group, grp);
}
}
}
}
ENDGRENT();
pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid);
if (!PWALTDIR()) {
/*
* Remove mail file
*/
remove(file);
/*
* Remove at jobs
*/
if (getpwuid(uid) == NULL)
rmat(uid);
/*
* Remove home directory and contents
*/
if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) {
if (stat(home, &st) != -1) {
rm_r(home, uid);
pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved",
a_name->val, (long) uid, home,
stat(home, &st) == -1 ? "" : "not completely ");
}
}
}
return EXIT_SUCCESS;
} else if (mode == M_PRINT)
return print_user(pwd,
getarg(args, 'P') != NULL,
getarg(args, '7') != NULL);
/*
* The rest is edit code
*/
if ((arg = getarg(args, 'l')) != NULL) {
if (strcmp(pwd->pw_name, "root") == 0)
errx(EX_DATAERR, "can't rename `root' account");
pwd->pw_name = pw_checkname((u_char *)arg->val, 0);
edited = 1;
}
if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) {
pwd->pw_uid = (uid_t) atol(arg->val);
edited = 1;
if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
errx(EX_DATAERR, "can't change uid of `root' account");
if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name);
}
if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) { /* Already checked this */
gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid;
if (newgid != pwd->pw_gid) {
edited = 1;
pwd->pw_gid = newgid;
}
}
if ((arg = getarg(args, 'p')) != NULL) {
if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
if (pwd->pw_change != 0) {
pwd->pw_change = 0;
edited = 1;
}
}
else {
time_t now = time(NULL);
time_t expire = parse_date(now, arg->val);
if (pwd->pw_change != expire) {
pwd->pw_change = expire;
edited = 1;
}
}
}
if ((arg = getarg(args, 'e')) != NULL) {
if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
if (pwd->pw_expire != 0) {
pwd->pw_expire = 0;
edited = 1;
}
}
else {
time_t now = time(NULL);
time_t expire = parse_date(now, arg->val);
if (pwd->pw_expire != expire) {
pwd->pw_expire = expire;
edited = 1;
}
}
}
if ((arg = getarg(args, 's')) != NULL) {
char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val);
if (shell == NULL)
shell = "";
if (strcmp(shell, pwd->pw_shell) != 0) {
pwd->pw_shell = shell;
edited = 1;
}
}
if (getarg(args, 'L')) {
if (cnf->default_class == NULL)
cnf->default_class = "";
if (strcmp(pwd->pw_class, cnf->default_class) != 0) {
pwd->pw_class = cnf->default_class;
edited = 1;
}
}
if ((arg = getarg(args, 'd')) != NULL) {
if (strcmp(pwd->pw_dir, arg->val))
edited = 1;
if (stat(pwd->pw_dir = arg->val, &st) == -1) {
if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0)
warnx("WARNING: home `%s' does not exist", pwd->pw_dir);
} else if (!S_ISDIR(st.st_mode))
warnx("WARNING: home `%s' is not a directory", pwd->pw_dir);
}
if ((arg = getarg(args, 'w')) != NULL &&
getarg(args, 'h') == NULL && getarg(args, 'H') == NULL) {
login_cap_t *lc;
lc = login_getpwclass(pwd);
if (lc == NULL ||
login_setcryptfmt(lc, "sha512", NULL) == NULL)
warn("setting crypt(3) format");
login_close(lc);
pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
edited = 1;
}
} else {
login_cap_t *lc;
/*
* Add code
*/
if (a_name == NULL) /* Required */
errx(EX_DATAERR, "login name required");
else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */
errx(EX_DATAERR, "login name `%s' already exists", a_name->val);
/*
* Now, set up defaults for a new user
*/
pwd = &fakeuser;
pwd->pw_name = a_name->val;
pwd->pw_class = cnf->default_class ? cnf->default_class : "";
pwd->pw_uid = pw_uidpolicy(cnf, args);
pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid);
pwd->pw_change = pw_pwdpolicy(cnf, args);
pwd->pw_expire = pw_exppolicy(cnf, args);
pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name);
pwd->pw_shell = pw_shellpolicy(cnf, args, NULL);
lc = login_getpwclass(pwd);
if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL)
warn("setting crypt(3) format");
login_close(lc);
pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
edited = 1;
if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name);
}
/*
* Shared add/edit code
*/
if ((arg = getarg(args, 'c')) != NULL) {
char *gecos = pw_checkname((u_char *)arg->val, 1);
if (strcmp(pwd->pw_gecos, gecos) != 0) {
pwd->pw_gecos = gecos;
edited = 1;
}
}
if ((arg = getarg(args, 'h')) != NULL ||
(arg = getarg(args, 'H')) != NULL) {
if (strcmp(arg->val, "-") == 0) {
if (!pwd->pw_passwd || *pwd->pw_passwd != '*') {
pwd->pw_passwd = "*"; /* No access */
edited = 1;
}
} else {
int fd = atoi(arg->val);
int precrypt = (arg->ch == 'H');
int b;
int istty = isatty(fd);
struct termios t;
login_cap_t *lc;
if (istty) {
if (tcgetattr(fd, &t) == -1)
istty = 0;
else {
struct termios n = t;
/* Disable echo */
n.c_lflag &= ~(ECHO);
tcsetattr(fd, TCSANOW, &n);
printf("%s%spassword for user %s:",
(mode == M_UPDATE) ? "new " : "",
precrypt ? "encrypted " : "",
pwd->pw_name);
fflush(stdout);
}
}
b = read(fd, line, sizeof(line) - 1);
if (istty) { /* Restore state */
tcsetattr(fd, TCSANOW, &t);
fputc('\n', stdout);
fflush(stdout);
}
if (b < 0) {
warn("-%c file descriptor", precrypt ? 'H' :
'h');
return EX_IOERR;
}
line[b] = '\0';
if ((p = strpbrk(line, "\r\n")) != NULL)
*p = '\0';
if (!*line)
errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
if (precrypt) {
if (strchr(line, ':') != NULL)
return EX_DATAERR;
pwd->pw_passwd = line;
} else {
lc = login_getpwclass(pwd);
if (lc == NULL ||
login_setcryptfmt(lc, "sha512", NULL) == NULL)
warn("setting crypt(3) format");
login_close(lc);
pwd->pw_passwd = pw_pwcrypt(line);
}
edited = 1;
}
}
/*
* Special case: -N only displays & exits
*/
if (getarg(args, 'N') != NULL)
return print_user(pwd,
getarg(args, 'P') != NULL,
getarg(args, '7') != NULL);
if (mode == M_ADD) {
edited = 1; /* Always */
rc = addpwent(pwd);
if (rc == -1) {
warnx("user '%s' already exists", pwd->pw_name);
return EX_IOERR;
} else if (rc != 0) {
warn("passwd file update");
return EX_IOERR;
}
if (cnf->nispasswd && *cnf->nispasswd=='/') {
rc = addnispwent(cnf->nispasswd, pwd);
if (rc == -1)
warnx("User '%s' already exists in NIS passwd", pwd->pw_name);
else
warn("NIS passwd update");
/* NOTE: we treat NIS-only update errors as non-fatal */
}
} else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) {
if (edited) { /* Only updated this if required */
rc = chgpwent(a_name->val, pwd);
if (rc == -1) {
warnx("user '%s' does not exist (NIS?)", pwd->pw_name);
return EX_IOERR;
} else if (rc != 0) {
warn("passwd file update");
return EX_IOERR;
}
if ( cnf->nispasswd && *cnf->nispasswd=='/') {
rc = chgnispwent(cnf->nispasswd, a_name->val, pwd);
if (rc == -1)
warn("User '%s' not found in NIS passwd", pwd->pw_name);
else
warn("NIS passwd update");
/* NOTE: NIS-only update errors are not fatal */
}
}
}
/*
* Ok, user is created or changed - now edit group file
*/
if (mode == M_ADD || getarg(args, 'G') != NULL) {
int i;
for (i = 0; cnf->groups[i] != NULL; i++) {
grp = GETGRNAM(cnf->groups[i]);
grp = gr_add(grp, pwd->pw_name);
/*
* grp can only be NULL in 2 cases:
* - the new member is already a member
* - a problem with memory occurs
* in both cases we want to skip now.
*/
if (grp == NULL)
continue;
chggrent(cnf->groups[i], grp);
free(grp);
}
}
/* go get a current version of pwd */
pwd = GETPWNAM(a_name->val);
if (pwd == NULL) {
/* This will fail when we rename, so special case that */
if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) {
a_name->val = arg->val; /* update new name */
pwd = GETPWNAM(a_name->val); /* refetch renamed rec */
}
}
if (pwd == NULL) /* can't go on without this */
errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val);
grp = GETGRGID(pwd->pw_gid);
pw_log(cnf, mode, W_USER, "%s(%ld):%s(%ld):%s:%s:%s",
pwd->pw_name, (long) pwd->pw_uid,
grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1),
pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
/*
* If adding, let's touch and chown the user's mail file. This is not
* strictly necessary under BSD with a 0755 maildir but it also
* doesn't hurt anything to create the empty mailfile
*/
if (mode == M_ADD) {
if (!PWALTDIR()) {
sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
close(open(line, O_RDWR | O_CREAT, 0600)); /* Preserve contents &
* mtime */
chown(line, pwd->pw_uid, pwd->pw_gid);
}
}
/*
* Let's create and populate the user's home directory. Note
* that this also `works' for editing users if -m is used, but
* existing files will *not* be overwritten.
*/
if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
copymkdir(pwd->pw_dir, cnf->dotdir, cnf->homemode, pwd->pw_uid, pwd->pw_gid);
pw_log(cnf, mode, W_USER, "%s(%ld) home %s made",
pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir);
}
/*
* Finally, send mail to the new user as well, if we are asked to
*/
if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) {
FILE *pfp = popen(_PATH_SENDMAIL " -t", "w");
if (pfp == NULL)
warn("sendmail");
else {
fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name);
while (fgets(line, sizeof(line), fp) != NULL) {
/* Do substitutions? */
fputs(line, pfp);
}
pclose(pfp);
pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent",
pwd->pw_name, (long) pwd->pw_uid);
}
fclose(fp);
}
return EXIT_SUCCESS;
}
int
editgroups(char *name, char **groups)
{
int rc = 0;
int infd;
char groupfile[MAXPATHLEN];
char grouptmp[MAXPATHLEN];
strncpy(groupfile, getgrpath(_GROUP), MAXPATHLEN - 5);
groupfile[MAXPATHLEN - 5] = '\0';
strcpy(grouptmp, groupfile);
strcat(grouptmp, ".new");
if ((infd = open(groupfile, O_RDWR | O_CREAT | O_EXLOCK, 0644)) != -1) {
FILE *infp;
if ((infp = fdopen(infd, "r+")) == NULL)
close(infd);
else {
int outfd;
if ((outfd = open(grouptmp, O_RDWR | O_CREAT | O_TRUNC, 0644)) != -1) {
FILE *outfp;
if ((outfp = fdopen(outfd, "w+")) == NULL)
close(outfd);
else {
int linelen = PWBUFSZ;
int outlen = PWBUFSZ;
int memlen = 200; /* Arbitrary */
char *line = malloc(linelen);
char *outl = malloc(outlen);
char **mems = malloc(memlen * sizeof(char *));
int namlen = strlen(name);
if (line == NULL || outl == NULL || mems == NULL) {
mem_abort:
rc = 0;
} else {
while (fgets(line, linelen, infp) != NULL) {
char *p;
int l;
while ((p = strchr(line, '\n')) == NULL)
{
if (extendline(&line, &linelen, linelen + PWBUFSZ) == -1) {
goto mem_abort;
}
l = strlen(line);
if (fgets(line + l, linelen - l, infp) == NULL)
break; /* No newline terminator on last line */
}
l = strlen(line) + namlen + 1;
if (extendline(&outl, &outlen, l) == -1) {
goto mem_abort;
}
if (*line == '#')
strcpy(outl, line);
else if (*line == '\n')
*outl = '\0';
else {
int i,
mno = 0;
char *cp = line;
char const *sep = ":\n";
struct group grp;
memset(&grp, 0, sizeof grp);
for (i = 0; (p = strsep(&cp, sep)) != NULL; i++) {
switch (i) {
case 0: /* Group name */
grp.gr_name = p;
break;
case 1: /* Group password */
grp.gr_passwd = p;
break;
case 2: /* Group id */
grp.gr_gid = atoi(p);
break;
case 3: /* Member list */
cp = p;
sep = ",\n";
break;
default: /* Individual members */
if (*p) {
if (extendarray(&mems, &memlen, mno + 2) == -1) {
goto mem_abort;
}
mems[mno++] = p;
}
break;
}
}
if (i < 2) /* Bail out - insufficient fields */
continue;
grp.gr_mem = mems;
for (i = mno; i < memlen; i++)
mems[i] = NULL;
/*
* Delete from group, or add to group?
*/
if (groups == NULL || isingroup(grp.gr_name, groups) == -1) { /* Delete */
int idx;
while ((idx = isingroup(name, mems)) != -1) {
for (i = idx; i < (memlen - 1); i++)
mems[i] = mems[i + 1];
mems[i] = NULL;
--mno;
}
/*
* Special case - deleting user and group may be user's own
*/
if (groups == NULL && mems[0] == NULL && strcmp(name, grp.gr_name) == 0) {
/*
* First, make _sure_ we don't have other members
*/
struct passwd *pwd;
SETPWENT();
while ((pwd = GETPWENT()) != NULL && (gid_t)pwd->pw_gid != (gid_t)grp.gr_gid);
ENDPWENT();
if (pwd == NULL) /* No members at all */
continue; /* Drop the group */
}
} else if (isingroup(name, mems) == -1) {
if (extendarray(&mems, &memlen, mno + 2) == -1) {
goto mem_abort;
}
grp.gr_mem = mems; /* May have realloced() */
mems[mno++] = name;
mems[mno ] = NULL;
}
fmtgrentry(&outl, &outlen, &grp, PWF_GROUP);
}
fputs(outl, outfp);
}
if (fflush(outfp) != EOF) {
rc = 1;
/*
* Copy data back into the original file and truncate
*/
rewind(infp);
rewind(outfp);
while (fgets(outl, outlen, outfp) != NULL)
fputs(outl, infp);
/*
* This is a gross hack, but we may have corrupted the
* original file.
*/
if (fflush(infp) == EOF || ferror(infp))
rc = rename(grouptmp, groupfile) == 0;
else
ftruncate(infd, ftell(infp));
}
}
free(mems);
free(outl);
free(line);
fclose(outfp);
}
remove(grouptmp);
}
fclose(infp);
}
}
return rc;
}