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annotate toys/pending/groupdel.c @ 1363:e65f9a9ba62d draft

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Cleanup pass on mkpasswd.c
author Rob Landley <rob@landley.net>
date Wed, 25 Jun 2014 22:54:59 -0500
parents f1c924e08e63
children ed28d4d9558d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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f1c924e08e63 Attached is an implementation for groupdel.
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1 /* groupdel.c - delete a group
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2 *
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3 * Copyright 2013 Ashwini Kumar <ak.ashwini1981@gmail.com>
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4 * Copyright 2013 Kyungwan Han <asura321@gmail.com>
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5 *
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6 * See http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/groupdel.html
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7
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8 USE_GROUPDEL(NEWTOY(groupdel, "<1>2", TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
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9 USE_GROUPDEL(OLDTOY(delgroup, groupdel, OPTSTR_groupdel, TOYFLAG_NEEDROOT|TOYFLAG_SBIN))
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10
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11 config GROUPDEL
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12 bool "groupdel"
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13 default n
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14 help
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15 usage: delgroup [USER] GROUP
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16 groupdel GROUP
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17
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18 Delete a group or delete a user from a group
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19 */
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20
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21 #define FOR_groupdel
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22 #include "toys.h"
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23
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24 void groupdel_main(void)
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25 {
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26 struct group *grp = NULL;
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27 char *entry = NULL;
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28
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29 if (toys.optc == 2) { //del user from group
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30 //toys.optargs[0]- user, toys.optargs[1] - group
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31 if (!getpwnam(toys.optargs[0]))
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32 error_exit("user '%s' does not exist", toys.optargs[0]);
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33 if (!(grp = getgrnam(toys.optargs[1])))
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34 error_exit("group '%s' does not exist", toys.optargs[1]);
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35 if (!(grp = getgrnam(toys.optargs[1])))
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36 error_exit("group '%s' does not exist", toys.optargs[1]);
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37 if (!grp->gr_mem) return;
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38 else {
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39 int i, found = -1;
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40
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41 for (i = 0; grp->gr_mem[i] && (found == -1); i++)
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42 if (!strcmp(grp->gr_mem[i], *toys.optargs)) found = i;
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43
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44 if (found == -1) {
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45 xprintf("%s: The user '%s' is not a member of '%s'\n", toys.which->name,
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46 toys.optargs[0], toys.optargs[1]);
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47 return;
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48 }
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49 entry = xstrdup("");
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50 for (i=0; grp->gr_mem[i]; i++) {
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51 if (found != i) { //leave out user from grp member list
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52 if (i && *entry) strcat(entry, ",");
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53 entry = xrealloc(entry, strlen(entry) + strlen(grp->gr_mem[i]) + 2);
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54 strcat(entry, grp->gr_mem[i]);
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55 }
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56 }
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57 }
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58 } else { //delete the group
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59 struct passwd *pw = NULL;
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60
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61 if (!(grp = getgrnam(*toys.optargs)))
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62 error_exit("group '%s' doesn't exist", *toys.optargs);
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63 //is it a primary grp of user
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64 while ((pw = getpwent())) {
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65 if (pw->pw_gid == grp->gr_gid) {
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66 endpwent();
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67 error_exit("can't remove primary group of user '%s'", pw->pw_name);
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68 }
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69 }
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70 endpwent();
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71 }
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72 update_password("/etc/group", grp->gr_name, entry);
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73 update_password("/etc/gshadow", grp->gr_name, entry);
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74 free(entry);
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75 }