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annotate lib/priv-set.c @ 16366:bb182ee4a09d

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maint: replace FSF snail-mail addresses with URLs * config/argz.mk, lib/accept4.c, lib/alignof.h, lib/alloca.in.h: * lib/alphasort.c, lib/arcfour.c, lib/arcfour.h, lib/arctwo.c: * lib/arctwo.h, lib/argz.c, lib/arpa_inet.in.h, lib/asnprintf.c: * lib/asprintf.c, lib/assert.in.h, lib/base32.c, lib/base32.h: * lib/base64.c, lib/base64.h, lib/c-ctype.c, lib/c-ctype.h: * lib/c-strcase.h, lib/c-strcasecmp.c, lib/c-strncasecmp.c: * lib/check-version.c, lib/check-version.h, lib/config.charset: * lib/ctype.in.h, lib/des.c, lib/des.h, lib/dup3.c, lib/errno.in.h: * lib/float+.h, lib/fnmatch.c, lib/fnmatch.in.h, lib/fnmatch_loop.c: * lib/fseeko.c, lib/gai_strerror.c, lib/gc-gnulib.c: * lib/gc-libgcrypt.c, lib/gc-pbkdf2-sha1.c, lib/gc.h: * lib/getaddrinfo.c, lib/getdelim.c, lib/getfilecon.c, lib/getline.c: * lib/getlogin_r.c, lib/getpass.c, lib/getpass.h, lib/gettext.h: * lib/gettimeofday.c, lib/glob.in.h, lib/glthread/cond.c: * lib/glthread/cond.h, lib/glthread/lock.c, lib/glthread/lock.h: * lib/glthread/thread.c, lib/glthread/thread.h: * lib/glthread/threadlib.c, lib/glthread/yield.h, lib/hmac-md5.c: * lib/hmac-sha1.c, lib/hmac.h, lib/iconv.c, lib/iconv.in.h: * lib/iconv_close.c, lib/iconv_open.c, lib/inet_ntop.c, lib/isfinite.c: * lib/isinf.c, lib/iswblank.c, lib/langinfo.in.h, lib/link.c: * lib/localcharset.c, lib/localcharset.h, lib/lseek.c, lib/malloc.c: * lib/malloca.c, lib/malloca.h, lib/md2.c, lib/md2.h, lib/md4.c: * lib/md4.h, lib/md5.c, lib/md5.h, lib/memmem.c, lib/mempcpy.c: * lib/memset.c, lib/memxor.c, lib/memxor.h, lib/minmax.h, lib/mktime.c: * lib/msvc-inval.c, lib/msvc-inval.h, lib/msvc-nothrow.c: * lib/msvc-nothrow.h, lib/netdb.in.h, lib/netinet_in.in.h, lib/nproc.c: * lib/nproc.h, lib/obstack_printf.c, lib/pathmax.h, lib/pipe.c: * lib/pipe2.c, lib/poll.c, lib/poll.in.h, lib/printf-args.c: * lib/printf-args.h, lib/printf-parse.c, lib/printf-parse.h: * lib/pselect.c, lib/pthread.in.h, lib/pty-private.h, lib/pty.in.h: * lib/read-file.c, lib/read-file.h, lib/ref-add.sin, lib/ref-del.sin: * lib/regcomp.c, lib/regex.c, lib/regex.h, lib/regex_internal.c: * lib/regex_internal.h, lib/regexec.c, lib/rijndael-alg-fst.c: * lib/rijndael-alg-fst.h, lib/rijndael-api-fst.c: * lib/rijndael-api-fst.h, lib/rint.c, lib/rintf.c, lib/rintl.c: * lib/round.c, lib/roundf.c, lib/roundl.c, lib/scandir.c, lib/select.c: * lib/sha1.c, lib/sha1.h, lib/size_max.h, lib/snprintf.c: * lib/stdalign.in.h, lib/stdarg.in.h, lib/stdbool.in.h: * lib/stddef.in.h, lib/stdint.in.h, lib/stdio.in.h, lib/str-kmp.h: * lib/str-two-way.h, lib/strcasecmp.c, lib/strcasestr.c, lib/strdup.c: * lib/striconv.c, lib/striconv.h, lib/string.in.h, lib/strings.in.h: * lib/strncasecmp.c, lib/strndup.c, lib/strnlen.c, lib/strpbrk.c: * lib/strptime.c, lib/strsep.c, lib/strstr.c, lib/strverscmp.c: * lib/sys_file.in.h, lib/sys_ioctl.in.h, lib/sys_select.in.h: * lib/sys_socket.in.h, lib/sys_stat.in.h, lib/sys_time.in.h: * lib/sys_times.in.h, lib/sys_types.in.h, lib/sys_uio.in.h: * lib/sys_utsname.in.h, lib/sys_wait.in.h, lib/tcgetsid.c: * lib/termios.in.h, lib/time.in.h, lib/time_r.c, lib/timegm.c: * lib/times.c, lib/unictype/3level.h, lib/unictype/3levelbit.h: * lib/unistd.in.h, lib/vasnprintf.c, lib/vasnprintf.h, lib/vasprintf.c: * lib/vsnprintf.c, lib/waitpid.c, lib/wchar.in.h, lib/wctype.in.h: * lib/xsize.h, tests/test-closein.c, tests/test-des.c: * tests/test-fclose.c, tests/test-fgetc.c, tests/test-filevercmp.c: * tests/test-fputc.c, tests/test-fread.c, tests/test-fwrite.c: * tests/test-gc-arcfour.c, tests/test-gc-arctwo.c, tests/test-gc-des.c: * tests/test-gc-hmac-md5.c, tests/test-gc-hmac-sha1.c: * tests/test-gc-md2.c, tests/test-gc-md4.c, tests/test-gc-md5.c: * tests/test-gc-pbkdf2-sha1.c, tests/test-gc-rijndael.c: * tests/test-gc-sha1.c, tests/test-gc.c, tests/test-getdelim.c: * tests/test-getline.c, tests/test-getndelim2.c, tests/test-md2.c: * tests/test-md4.c, tests/test-parse-datetime.c, tests/test-perror.c: * tests/test-perror2.c, tests/test-pipe.c, tests/test-pipe2.c: * tests/test-poll.c, tests/test-quotearg-simple.c: * tests/test-quotearg.c, tests/test-quotearg.h: * tests/test-round-ieee.c, tests/test-round1.c: * tests/test-roundf-ieee.c, tests/test-roundf1.c: * tests/test-roundl-ieee.c, tests/test-roundl.c: * tests/test-safe-alloc.c, tests/test-sigpipe.c: * tests/test-spawn-pipe-child.c, tests/test-spawn-pipe-main.c: * tests/test-strerror.c, tests/test-strerror_r.c: * tests/test-strsignal.c, tests/test-strverscmp.c: * tests/test-xmemdup0.c: Replace FSF snail mail addresses with URLs, as per GNU coding standards. See glibc bug <http://sourceware.org/bugzilla/show_bug.cgi?id=13673>.
author Paul Eggert <eggert@cs.ucla.edu>
date Thu, 09 Feb 2012 21:39:05 -0800
parents 8250f2777afc
children 16d02df1b46e
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1 /* Query, remove, or restore a Solaris privilege.
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2
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3 Copyright (C) 2009-2012 Free Software Foundation, Inc.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>.
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17
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18 Written by David Bartley. */
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19
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20 #include <config.h>
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21 #include "priv-set.h"
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22
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23 #if HAVE_GETPPRIV && HAVE_PRIV_H
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24
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25 # include <errno.h>
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26 # include <stdbool.h>
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27 # include <priv.h>
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28
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29 /* Holds a (cached) copy of the effective set. */
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30 static priv_set_t *eff_set;
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31
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32 /* Holds a set of privileges that we have removed. */
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33 static priv_set_t *rem_set;
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34
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35 static bool initialized;
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36
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37 static int
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38 priv_set_initialize (void)
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39 {
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40 if (! initialized)
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41 {
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42 eff_set = priv_allocset ();
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43 if (!eff_set)
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44 {
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45 return -1;
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46 }
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47 rem_set = priv_allocset ();
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48 if (!rem_set)
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49 {
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50 priv_freeset (eff_set);
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51 return -1;
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52 }
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53 if (getppriv (PRIV_EFFECTIVE, eff_set) != 0)
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54 {
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55 priv_freeset (eff_set);
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56 priv_freeset (rem_set);
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57 return -1;
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58 }
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59 priv_emptyset (rem_set);
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60 initialized = true;
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61 }
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62
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63 return 0;
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64 }
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65
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66
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67 /* Check if priv is in the effective set.
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68 Returns 1 if priv is a member and 0 if not.
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69 Returns -1 on error with errno set appropriately. */
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70 int
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71 priv_set_ismember (const char *priv)
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72 {
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73 if (! initialized && priv_set_initialize () != 0)
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74 return -1;
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75
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76 return priv_ismember (eff_set, priv);
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77 }
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78
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79
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80 /* Try to remove priv from the effective set.
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81 Returns 0 if priv was removed.
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82 Returns -1 on error with errno set appropriately. */
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83 int
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84 priv_set_remove (const char *priv)
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85 {
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86 if (! initialized && priv_set_initialize () != 0)
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87 return -1;
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88
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89 if (priv_ismember (eff_set, priv))
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90 {
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91 /* priv_addset/priv_delset can only fail if priv is invalid, which is
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92 checked above by the priv_ismember call. */
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93 priv_delset (eff_set, priv);
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94 if (setppriv (PRIV_SET, PRIV_EFFECTIVE, eff_set) != 0)
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95 {
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96 priv_addset (eff_set, priv);
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97 return -1;
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98 }
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99 priv_addset (rem_set, priv);
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100 }
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101 else
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102 {
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103 errno = EINVAL;
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104 return -1;
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105 }
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106
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107 return 0;
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108 }
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109
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110
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111 /* Try to restore priv to the effective set.
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112 Returns 0 if priv was re-added to the effective set (after being previously
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113 removed by a call to priv_set_remove).
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114 Returns -1 on error with errno set appropriately. */
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115 int
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116 priv_set_restore (const char *priv)
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117 {
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118 if (! initialized && priv_set_initialize () != 0)
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119 return -1;
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120
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121 if (priv_ismember (rem_set, priv))
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122 {
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123 /* priv_addset/priv_delset can only fail if priv is invalid, which is
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124 checked above by the priv_ismember call. */
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125 priv_addset (eff_set, priv);
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126 if (setppriv (PRIV_SET, PRIV_EFFECTIVE, eff_set) != 0)
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127 {
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128 priv_delset (eff_set, priv);
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129 return -1;
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130 }
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131 priv_delset (rem_set, priv);
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132 }
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133 else
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134 {
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135 errno = EINVAL;
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136 return -1;
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137 }
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138
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139 return 0;
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140 }
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141
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142 #endif