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/* groupdel.c - delete a group
*
* Copyright 2013 Ashwini Kumar <ak.ashwini1981@gmail.com>
* Copyright 2013 Kyungwan Han <asura321@gmail.com>
*
* See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/groupdel.html
USE_GROUPDEL(NEWTOY(groupdel, "<1>2", TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
USE_GROUPDEL(OLDTOY(delgroup, groupdel, TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
config GROUPDEL
bool "groupdel"
default n
help
usage: groupdel [USER] GROUP
Delete a group or remove a user from a group
*/
#define FOR_groupdel
#include "toys.h"
void groupdel_main(void)
{
struct group *grp = xgetgrnam(toys.optargs[toys.optc-1]);
char *entry = 0;
// delete user from group
if (toys.optc == 2) {
int i, len = 0, found = 0;
char *s;
xgetpwnam(*toys.optargs);
if (grp->gr_mem) for (i = 0; grp->gr_mem[i]; i++) {
if (!found && !strcmp(*toys.optargs, grp->gr_mem[i])) found++;
else len += strlen(grp->gr_mem[i]) + 1;
}
if (!found)
error_exit("user '%s' not in group '%s'", *toys.optargs, toys.optargs[1]);
entry = s = xmalloc(len);
for (i = 0; grp->gr_mem[i]; ) {
if (i) *(s++) = ',';
s = stpcpy(s, grp->gr_mem[i]);
}
// delete group
} else {
struct passwd *pw;
for (endpwent(); (pw = getpwent());)
if (pw->pw_gid == grp->gr_gid) break;
if (pw) error_exit("can't remove primary group of user '%s'", pw->pw_name);
if (CFG_TOYBOX_FREE) endpwent();
}
update_password("/etc/group", grp->gr_name, entry);
update_password("/etc/gshadow", grp->gr_name, entry);
if (CFG_TOYBOX_FREE) free(entry);
}
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