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annotate toys/pending/groupdel.c @ 1634:5fac2769a159 draft

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Redo option parsing infrastructure so #define FORCE_FLAGS can unzero flag macros for a disabled command (needed when multiple commands share infrastructure with a common set of flags). This means the flag space is no longer packed, but leaves gaps where the zeroes go. (Actual flag bit positions are the same for all configs.) Since the option parsing needs to know where the holes are, the OPTSTR values are now generated as part of flags.h with ascii 1 values for the disabled values. (So generated/oldflags.h went away.) This also means that the option string argument for OLDTOY() went away, it now uses the same arguments as the NEWTOY() it references.
author Rob Landley <rob@landley.net>
date Wed, 31 Dec 2014 21:30:59 -0600
parents 3fa0b2931082
children
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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, 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: groupdel [USER] GROUP
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16
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17 Delete a group or remove a user from a group
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18 */
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19
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20 #define FOR_groupdel
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21 #include "toys.h"
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22
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23 void groupdel_main(void)
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24 {
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25 struct group *grp = xgetgrnam(toys.optargs[toys.optc-1]);
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26 char *entry = 0;
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27
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28 // delete user from group
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29 if (toys.optc == 2) {
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30 int i, len = 0, found = 0;
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31 char *s;
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33 xgetpwnam(*toys.optargs);
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34 if (grp->gr_mem) for (i = 0; grp->gr_mem[i]; i++) {
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35 if (!found && !strcmp(*toys.optargs, grp->gr_mem[i])) found++;
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36 else len += strlen(grp->gr_mem[i]) + 1;
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37 }
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38 if (!found)
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39 error_exit("user '%s' not in group '%s'", *toys.optargs, toys.optargs[1]);
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41 entry = s = xmalloc(len);
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42 for (i = 0; grp->gr_mem[i]; ) {
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43 if (i) *(s++) = ',';
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44 s = stpcpy(s, grp->gr_mem[i]);
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45 }
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46
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47 // delete group
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48 } else {
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49 struct passwd *pw;
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50
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51 for (endpwent(); (pw = getpwent());)
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52 if (pw->pw_gid == grp->gr_gid) break;
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53
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54 if (pw) error_exit("can't remove primary group of user '%s'", pw->pw_name);
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55 if (CFG_TOYBOX_FREE) endpwent();
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56 }
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57
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58 update_password("/etc/group", grp->gr_name, entry);
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59 update_password("/etc/gshadow", grp->gr_name, entry);
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60 if (CFG_TOYBOX_FREE) free(entry);
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61 }