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annotate tests/test-userspec.c @ 40219:53cae2062bf4

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test-userspec.c: don't print NULL * tests/test-userspec.c (main): A test release of gcc, 9.0.1 20190310, warned that this test would attempt to print a NULL pointer via a %s printf format. Fix that and remove the unnecessary preceding "!diag" conjunct. Also add a comment.
author Jim Meyering <meyering@fb.com>
date Sat, 09 Mar 2019 21:38:03 -0800
parents b06060465f09
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* Test userspec.c
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2 Copyright (C) 2009-2019 Free Software Foundation, Inc.
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3
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4 This program is free software: you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
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16
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17 /* Written by Jim Meyering. */
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18
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19 #include <config.h>
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20
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21 #include "userspec.h"
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22
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23 #include <stdio.h>
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24 #include <assert.h>
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25 #include <string.h>
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26 #include <stdlib.h>
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27 #include <stdbool.h>
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28 #include <sys/types.h>
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29 #include <pwd.h>
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30 #include <grp.h>
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31
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32 #include "xalloc.h"
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33
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34 #define ARRAY_CARDINALITY(Array) (sizeof (Array) / sizeof *(Array))
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35
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36 struct test
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37 {
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38 const char *in;
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39 uid_t uid;
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40 gid_t gid;
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41 const char *user_name;
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42 const char *group_name;
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43 const char *result;
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44 };
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45
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46 static struct test T[] =
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47 {
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48 { "", -1, -1, "", "", NULL},
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49 { ":", -1, -1, "", "", NULL},
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50 { "+0:+0", 0, 0, "", "", NULL},
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51 { ":+1", -1, 1, "", "", NULL},
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52 { "+1", 1, -1, "", "", NULL},
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53 { ":+0", -1, 0, "", "", NULL},
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54 { "+22:+42", 22, 42, "", "", NULL},
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55 /* (uint32_t)-1 should be invalid everywhere */
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56 { "+4294967295:+4294967295", 0, 0, NULL, NULL, "invalid user"},
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57 /* likewise, but with only the group being invalid */
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58 { "+0:+4294967295", 0, 0, NULL, NULL, "invalid group"},
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59 { ":+4294967295", 0, 0, NULL, NULL, "invalid group"},
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60 /* and only the user being invalid */
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61 { "+4294967295:+0", 0, 0, NULL, NULL, "invalid user"},
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62 /* and using 2^32 */
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63 { "+4294967296:+4294967296", 0, 0, NULL, NULL, "invalid user"},
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64 { "+0:+4294967296", 0, 0, NULL, NULL, "invalid group"},
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65 { ":+4294967296", 0, 0, NULL, NULL, "invalid group"},
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66 { "+4294967296:+0", 0, 0, NULL, NULL, "invalid user"},
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67 /* numeric user and no group is invalid */
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68 { "+4294967295:", 0, 0, NULL, NULL, "invalid spec"},
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69 { "+4294967296:", 0, 0, NULL, NULL, "invalid spec"},
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70 { "+1:", 0, 0, NULL, NULL, "invalid spec"},
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71 { "+0:", 0, 0, NULL, NULL, "invalid spec"},
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72
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73 /* "username:" must expand to UID:GID where GID is username's login group */
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74 /* Add an entry like the following to the table, if possible.
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75 { "U_NAME:", UID,GID, U_NAME, G_NAME, NULL}, */
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76 { NULL, 0, 0, NULL, NULL, ""}, /* place-holder */
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77
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78 { NULL, 0, 0, NULL, NULL, ""}
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79 };
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80
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81 #define STREQ(a, b) (strcmp (a, b) == 0)
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82
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83 static char const *
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84 maybe_null (char const *s)
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85 {
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86 return s ? s : "NULL";
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87 }
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88
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89 static bool
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90 same_diag (char const *s, char const *t)
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91 {
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92 if (s == NULL && t == NULL)
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93 return true;
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94 if (s == NULL || t == NULL)
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95 return false;
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96 return STREQ (s, t);
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97 }
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98
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99 int
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100 main (void)
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101 {
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102 unsigned int i;
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103 int fail = 0;
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104
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105 /* Find a UID that has both a user name and login group name,
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106 but skip UID 0. */
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107 {
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108 uid_t uid;
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109 for (uid = 1200; 0 < uid; uid--)
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110 {
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111 struct group *gr;
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112 struct passwd *pw = getpwuid (uid);
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113 unsigned int j;
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114 size_t len;
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115 if (!pw || !pw->pw_name || !(gr = getgrgid (pw->pw_gid)) || !gr->gr_name)
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116 continue;
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117 j = ARRAY_CARDINALITY (T) - 2;
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118 assert (T[j].in == NULL);
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119 assert (T[j+1].in == NULL);
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120 len = strlen (pw->pw_name);
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121
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122 /* Store "username:" in T[j].in. */
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123 {
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124 char *t = xmalloc (len + 1 + 1);
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125 memcpy (t, pw->pw_name, len);
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126 t[len] = ':';
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127 t[len+1] = '\0';
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128 T[j].in = t;
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129 }
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130
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131 T[j].uid = uid;
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132 T[j].gid = gr->gr_gid;
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133 T[j].user_name = xstrdup (pw->pw_name);
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134 T[j].group_name = xstrdup (gr->gr_name);
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135 T[j].result = NULL;
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136 break;
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137 }
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138 }
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139
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140 for (i = 0; T[i].in; i++)
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141 {
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142 uid_t uid = (uid_t) -1;
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143 gid_t gid = (gid_t) -1;
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144 char *user_name;
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145 char *group_name;
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146 char const *diag = parse_user_spec (T[i].in, &uid, &gid,
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147 &user_name, &group_name);
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148 free (user_name);
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149 free (group_name);
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150 if (!same_diag (diag, T[i].result))
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151 {
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152 printf ("%s return value mismatch: got %s, expected %s\n",
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153 T[i].in, maybe_null (diag), maybe_null (T[i].result));
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154 fail = 1;
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155 continue;
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156 }
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157
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158 if (diag)
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159 continue;
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160
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161 if (uid != T[i].uid || gid != T[i].gid)
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162 {
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163 printf ("%s mismatch (-: expected uid,gid; +:actual)\n"
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164 "-%3lu,%3lu\n+%3lu,%3lu\n",
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165 T[i].in,
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166 (unsigned long int) T[i].uid,
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167 (unsigned long int) T[i].gid,
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168 (unsigned long int) uid,
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169 (unsigned long int) gid);
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170 fail = 1;
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171 }
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172
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173 if (!T[i].result)
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174 continue;
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175
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176 /* Expected a non-NULL result diagnostic, yet got NULL. */
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177 diag = "NULL";
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178 printf ("%s diagnostic mismatch (-: expected diagnostic; +:actual)\n"
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179 "-%s\n+%s\n", T[i].in, T[i].result, diag);
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180 fail = 1;
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181 }
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182
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183 /* Ensure NULL parameters are ignored. */
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184 {
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185 uid_t uid = (uid_t) -1;
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186 char const *diag = parse_user_spec ("", &uid, NULL, NULL, NULL);
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187 if (diag)
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188 {
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189 printf ("unexpected error: %s\n", diag);
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190 fail = 1;
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191 }
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192 }
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193
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194 return fail;
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195 }
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196
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197 /*
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198 Local Variables:
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199 indent-tabs-mode: nil
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200 End:
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201 */