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Add the groupmod '-d' option to pw to allow the deletion of existing users

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from a group without the need to perform the same operation by replacing
the existing list via the '-M' option.  The '-M' option requires someone
to fetch the existing members with pw, deleting the undesired members from
the list and sending the altered list back to pw.

Approved by:	wes (mentor)
MFC after:	5 days
This commit is contained in:
scf 2008-02-23 01:25:22 +00:00
parent 9787c9bf4e
commit c88c109632
3 changed files with 92 additions and 16 deletions
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10
usr.sbin/pw/pw.8
View File

@ -155,6 +155,7 @@
.Op Fl l Ar name
.Op Fl M Ar members
.Op Fl m Ar newmembers
.Op Fl d Ar oldmembers
.Op Fl h Ar fd | Fl H Ar fd
.Op Fl N
.Op Fl P
@ -779,6 +780,15 @@ of existing users to a group without replacing the existing list of
members.
Login names or user ids may be used, and duplicate users are
silently eliminated.
.It Fl d Ar oldmembers
Similar to
.Fl M ,
this option allows the
.Em deletion
of existing users from a group without replacing the existing list of
members.
Login names or user ids may be used, and duplicate users are
silently eliminated.
.El
.Pp
.Ar groupadd

3
usr.sbin/pw/pw.c
View File

@ -117,7 +117,7 @@ main(int argc, char *argv[])
{ /* grp */
"V:C:qn:g:h:H:M:opNPY",
"V:C:qn:g:Y",
"V:C:qn:g:l:h:H:FM:m:NPY",
"V:C:qn:d:g:l:h:H:FM:m:NPY",
"V:C:qn:g:FPa",
"V:C:q"
}
@ -409,6 +409,7 @@ cmdhelp(int mode, int which)
"\t-g gid group id\n"
"\t-M usr1,usr2 replaces users as group members\n"
"\t-m usr1,usr2 add users as group members\n"
"\t-d usr1,usr2 delete users as group members\n"
"\t-l name new group name\n"
"\t-Y update NIS maps\n"
"\t-N no update\n",

79
usr.sbin/pw/pw_group.c
View File

@ -32,12 +32,16 @@ static const char rcsid[] =
#include <ctype.h>
#include <err.h>
#include <termios.h>
#include <stdbool.h>
#include <unistd.h>
#include "pw.h"
#include "bitmap.h"
static struct passwd *lookup_pwent(const char *user);
static void delete_members(char ***members, int *grmembers, int *i,
struct carg *arg, struct group *grp);
static int print_group(struct group * grp, int pretty);
static gid_t gr_gidpolicy(struct userconf * cnf, struct cargs * args);
@ -207,14 +211,18 @@ pw_group(struct userconf * cnf, int mode, struct cargs * args)
}
}
if (((arg = getarg(args, 'M')) != NULL || (arg = getarg(args, 'm')) != NULL) && arg->val) {
if (((arg = getarg(args, 'M')) != NULL ||
(arg = getarg(args, 'd')) != NULL ||
(arg = getarg(args, 'm')) != NULL) && arg->val) {
int i = 0;
char *p;
struct passwd *pwd;
/* Make sure this is not stay NULL with -M "" */
extendarray(&members, &grmembers, 200);
if (arg->ch == 'm') {
if (arg->ch == 'd')
delete_members(&members, &grmembers, &i, arg, grp);
else if (arg->ch == 'm') {
int k = 0;
while (grp->gr_mem[k] != NULL) {
@ -223,16 +231,16 @@ pw_group(struct userconf * cnf, int mode, struct cargs * args)
k++;
}
}
if (arg->ch != 'd')
for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
int j;
if ((pwd = GETPWNAM(p)) == NULL) {
if (!isdigit((unsigned char)*p) || (pwd = getpwuid((uid_t) atoi(p))) == NULL)
errx(EX_NOUSER, "user `%s' does not exist", p);
}
/*
* Check for duplicates
*/
for (j = 0; j < i && strcmp(members[j], pwd->pw_name)!=0; j++)
pwd = lookup_pwent(p);
for (j = 0; j < i && strcmp(members[j], pwd->pw_name) != 0; j++)
;
if (j == i && extendarray(&members, &grmembers, i + 2) != -1)
members[i++] = newstr(pwd->pw_name);
@ -271,6 +279,63 @@ pw_group(struct userconf * cnf, int mode, struct cargs * args)
}
/*
* Lookup a passwd entry using a name or UID.
*/
static struct passwd *
lookup_pwent(const char *user)
{
struct passwd *pwd;
if ((pwd = GETPWNAM(user)) == NULL &&
(!isdigit((unsigned char)*user) ||
(pwd = getpwuid((uid_t) atoi(user))) == NULL))
errx(EX_NOUSER, "user `%s' does not exist", user);
return (pwd);
}
/*
* Delete requested members from a group.
*/
static void
delete_members(char ***members, int *grmembers, int *i, struct carg *arg,
struct group *grp)
{
bool matchFound;
char *user;
char *valueCopy;
char *valuePtr;
int k;
struct passwd *pwd;
k = 0;
while (grp->gr_mem[k] != NULL) {
matchFound = false;
if ((valueCopy = strdup(arg->val)) == NULL)
errx(EX_UNAVAILABLE, "out of memory");
valuePtr = valueCopy;
while ((user = strsep(&valuePtr, ", \t")) != NULL) {
pwd = lookup_pwent(user);
if (strcmp(grp->gr_mem[k], pwd->pw_name) == 0) {
matchFound = true;
break;
}
}
free(valueCopy);
if (!matchFound &&
extendarray(members, grmembers, *i + 2) != -1)
(*members)[(*i)++] = grp->gr_mem[k];
k++;
}
return;
}
static gid_t
gr_gidpolicy(struct userconf * cnf, struct cargs * args)
{