1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * password utility routines.
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4 | *
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5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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6 | *
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7 | * Licensed under the GPL v2, see the file LICENSE in this tarball.
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8 | */
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9 |
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10 |
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11 | #ifdef L_bb_getgrgid
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12 | /* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
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13 | * flexible :
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14 | *
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15 | * if bufsize is > 0 char *group cannot be set to NULL.
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16 | * On success groupname is written on static allocated buffer
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17 | * group (and a pointer to it is returned).
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18 | * On failure gid as string is written to static allocated
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19 | * buffer group and NULL is returned.
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20 | * if bufsize is = 0 char *group can be set to NULL.
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21 | * On success groupname is returned.
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22 | * On failure NULL is returned.
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23 | * if bufsize is < 0 char *group can be set to NULL.
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24 | * On success groupname is returned.
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25 | * On failure an error message is printed and
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26 | * the program exits.
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27 | */
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28 |
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29 | #include "libbb.h"
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30 | #include "grp_.h"
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31 |
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32 | /* gets a groupname given a gid */
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33 | char * bb_getgrgid(char *group, long gid, int bufsize)
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34 | {
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35 | struct group *mygroup = getgrgid(gid);
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36 |
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37 | return bb_getug(group, (mygroup) ?
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38 | mygroup->gr_name : (char *)mygroup, gid, bufsize, 'g');
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39 | }
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40 | #endif /* L_bb_getgrgid */
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41 |
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42 | #ifdef L_bb_xgetgrnam
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43 | #include <stdio.h>
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44 | #include <string.h>
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45 | #include "libbb.h"
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46 | #include "pwd_.h"
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47 | #include "grp_.h"
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48 |
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49 |
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50 | /* returns a gid given a group name */
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51 | long bb_xgetgrnam(const char *name)
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52 | {
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53 | struct group *mygroup;
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54 |
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55 | mygroup = getgrnam(name);
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56 | if (mygroup==NULL)
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57 | bb_error_msg_and_die("unknown group name: %s", name);
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58 |
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59 | return (mygroup->gr_gid);
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60 | }
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61 | #endif /* L_bb_xgetgrnam */
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62 |
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63 | #ifdef L_bb_xgetpwnam
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64 | #include <stdio.h>
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65 | #include <string.h>
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66 | #include "libbb.h"
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67 | #include "pwd_.h"
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68 | #include "grp_.h"
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69 |
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70 |
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71 | /* returns a uid given a username */
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72 | long bb_xgetpwnam(const char *name)
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73 | {
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74 | struct passwd *myuser;
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75 |
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76 | myuser = getpwnam(name);
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77 | if (myuser==NULL)
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78 | bb_error_msg_and_die("unknown user name: %s", name);
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79 |
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80 | return myuser->pw_uid;
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81 | }
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82 | #endif /* L_bb_xgetpwnam */
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83 |
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84 | #ifdef L_bb_getpwuid
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85 | /* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
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86 | * flexible :
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87 | *
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88 | * if bufsize is > 0 char *name can not be set to NULL.
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89 | * On success username is written on the static allocated
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90 | * buffer name (and a pointer to it is returned).
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91 | * On failure uid as string is written to the static
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92 | * allocated buffer name and NULL is returned.
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93 | * if bufsize is = 0 char *name can be set to NULL.
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94 | * On success username is returned.
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95 | * On failure NULL is returned.
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96 | * if bufsize is < 0 char *name can be set to NULL
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97 | * On success username is returned.
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98 | * On failure an error message is printed and
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99 | * the program exits.
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100 | */
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101 |
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102 | #include "libbb.h"
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103 | #include "pwd_.h"
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104 |
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105 | /* gets a username given a uid */
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106 | char * bb_getpwuid(char *name, long uid, int bufsize)
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107 | {
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108 | struct passwd *myuser = getpwuid(uid);
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109 |
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110 | return bb_getug(name, (myuser) ?
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111 | myuser->pw_name : (char *)myuser , uid, bufsize, 'u');
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112 | }
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113 | #endif /* L_bb_getpwuid */
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114 |
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115 | #ifdef L_bb_getug
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116 | /*
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117 | * if bufsize is > 0 char *buffer can not be set to NULL.
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118 | * If idname is not NULL it is written on the static
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119 | * allocated buffer (and a pointer to it is returned).
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120 | * if idname is NULL, id as string is written to the static
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121 | * allocated buffer and NULL is returned.
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122 | * if bufsize is = 0 char *buffer can be set to NULL.
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123 | * If idname exists a pointer to it is returned,
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124 | * else NULL is returned.
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125 | * if bufsize is < 0 char *buffer can be set to NULL.
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126 | * If idname exists a pointer to it is returned,
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127 | * else an error message is printed and the program exits.
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128 | */
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129 |
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130 | #include <stdio.h>
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131 | #include <assert.h>
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132 | #include "libbb.h"
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133 |
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134 |
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135 | /* internal function for bb_getpwuid and bb_getgrgid */
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136 | char * bb_getug(char *buffer, char *idname, long id, int bufsize, char prefix)
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137 | {
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138 | if(bufsize > 0 ) {
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139 | assert(buffer!=NULL);
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140 | if(idname) {
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141 | return safe_strncpy(buffer, idname, bufsize);
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142 | }
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143 | snprintf(buffer, bufsize, "%ld", id);
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144 | } else if(bufsize < 0 && !idname) {
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145 | bb_error_msg_and_die("unknown %cid %ld", prefix, id);
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146 | }
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147 | return idname;
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148 | }
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149 | #endif /* L_bb_getug */
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150 |
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151 |
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152 | #ifdef L_get_ug_id
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153 | /* indirect dispatcher for pwd helpers. */
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154 | #include <stdlib.h>
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155 | #include "libbb.h"
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156 |
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157 | unsigned long get_ug_id(const char *s,
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158 | long (*__bb_getxxnam)(const char *))
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159 | {
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160 | unsigned long r;
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161 | char *p;
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162 |
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163 | r = strtoul(s, &p, 10);
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164 | if (*p || (s == p)) {
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165 | r = __bb_getxxnam(s);
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166 | }
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167 |
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168 | return r;
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169 | }
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170 | #endif /* L_get_ug_id */
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