1 | /* Copyright (C) 2003 Manuel Novoa III
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2 | *
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3 | * Licensed under GPL v2, or later. See file LICENSE in this tarball.
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4 | */
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5 |
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6 | /* Nov 6, 2003 Initial version.
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7 | *
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8 | * NOTE: This implementation is quite strict about requiring all
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9 | * field seperators. It also does not allow leading whitespace
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10 | * except when processing the numeric fields. glibc is more
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11 | * lenient. See the various glibc difference comments below.
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12 | *
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13 | * TODO:
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14 | * Move to dynamic allocation of (currently statically allocated)
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15 | * buffers; especially for the group-related functions since
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16 | * large group member lists will cause error returns.
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17 | *
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18 | */
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19 |
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20 | #include "libbb.h"
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21 | #include <features.h>
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22 | #include <stdio.h>
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23 | #include <stdlib.h>
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24 | #include <stdint.h>
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25 | #include <string.h>
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26 | #include <stddef.h>
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27 | #include <errno.h>
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28 | #include <assert.h>
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29 | #include <ctype.h>
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30 |
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31 | #include "shadow_.h"
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32 |
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33 | #ifndef _PATH_SHADOW
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34 | #define _PATH_SHADOW "/etc/shadow"
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35 | #endif
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36 | #ifndef _PATH_PASSWD
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37 | #define _PATH_PASSWD "/etc/passwd"
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38 | #endif
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39 | #ifndef _PATH_GROUP
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40 | #define _PATH_GROUP "/etc/group"
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41 | #endif
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42 |
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43 | /**********************************************************************/
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44 | /* Sizes for statically allocated buffers. */
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45 |
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46 | /* If you change these values, also change _SC_GETPW_R_SIZE_MAX and
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47 | * _SC_GETGR_R_SIZE_MAX in libc/unistd/sysconf.c to match */
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48 | #define PWD_BUFFER_SIZE 256
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49 | #define GRP_BUFFER_SIZE 256
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50 |
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51 | /**********************************************************************/
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52 | /* Prototypes for internal functions. */
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53 |
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54 | extern int __parsepwent(void *pw, char *line);
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55 | extern int __parsegrent(void *gr, char *line);
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56 | extern int __parsespent(void *sp, char *line);
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57 |
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58 | extern int __pgsreader(int (*__parserfunc)(void *d, char *line), void *data,
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59 | char *__restrict line_buff, size_t buflen, FILE *f);
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60 |
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61 | /**********************************************************************/
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62 | /* For the various fget??ent_r funcs, return
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63 | *
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64 | * 0: success
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65 | * ENOENT: end-of-file encountered
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66 | * ERANGE: buflen too small
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67 | * other error values possible. See __pgsreader.
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68 | *
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69 | * Also, *result == resultbuf on success and NULL on failure.
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70 | *
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71 | * NOTE: glibc difference - For the ENOENT case, glibc also sets errno.
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72 | * We do not, as it really isn't an error if we reach the end-of-file.
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73 | * Doing so is analogous to having fgetc() set errno on EOF.
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74 | */
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75 | /**********************************************************************/
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76 |
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77 | #ifdef L_fgetpwent_r
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78 |
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79 | int fgetpwent_r(FILE *__restrict stream, struct passwd *__restrict resultbuf,
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80 | char *__restrict buffer, size_t buflen,
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81 | struct passwd **__restrict result)
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82 | {
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83 | int rv;
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84 |
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85 | *result = NULL;
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86 |
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87 | if (!(rv = __pgsreader(__parsepwent, resultbuf, buffer, buflen, stream))) {
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88 | *result = resultbuf;
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89 | }
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90 |
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91 | return rv;
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92 | }
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93 |
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94 | #endif
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95 | /**********************************************************************/
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96 | #ifdef L_fgetgrent_r
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97 |
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98 | int fgetgrent_r(FILE *__restrict stream, struct group *__restrict resultbuf,
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99 | char *__restrict buffer, size_t buflen,
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100 | struct group **__restrict result)
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101 | {
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102 | int rv;
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103 |
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104 | *result = NULL;
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105 |
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106 | if (!(rv = __pgsreader(__parsegrent, resultbuf, buffer, buflen, stream))) {
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107 | *result = resultbuf;
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108 | }
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109 |
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110 | return rv;
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111 | }
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112 |
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113 | #endif
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114 | /**********************************************************************/
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115 | #ifdef L_fgetspent_r
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116 |
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117 | int fgetspent_r(FILE *__restrict stream, struct spwd *__restrict resultbuf,
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118 | char *__restrict buffer, size_t buflen,
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119 | struct spwd **__restrict result)
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120 | {
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121 | int rv;
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122 |
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123 | *result = NULL;
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124 |
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125 | if (!(rv = __pgsreader(__parsespent, resultbuf, buffer, buflen, stream))) {
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126 | *result = resultbuf;
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127 | }
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128 |
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129 | return rv;
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130 | }
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131 |
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132 | #endif
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133 | /**********************************************************************/
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134 | /* For the various fget??ent funcs, return NULL on failure and a
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135 | * pointer to the appropriate struct (statically allocated) on success.
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136 | */
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137 | /**********************************************************************/
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138 | #ifdef L_fgetpwent
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139 |
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140 | struct passwd *fgetpwent(FILE *stream)
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141 | {
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142 | static char buffer[PWD_BUFFER_SIZE];
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143 | static struct passwd resultbuf;
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144 | struct passwd *result;
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145 |
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146 | fgetpwent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
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147 | return result;
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148 | }
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149 |
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150 | #endif
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151 | /**********************************************************************/
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152 | #ifdef L_fgetgrent
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153 |
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154 | struct group *fgetgrent(FILE *stream)
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155 | {
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156 | static char buffer[GRP_BUFFER_SIZE];
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157 | static struct group resultbuf;
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158 | struct group *result;
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159 |
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160 | fgetgrent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
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161 | return result;
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162 | }
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163 |
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164 | #endif
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165 | /**********************************************************************/
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166 | #ifdef L_fgetspent
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167 |
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168 | extern int fgetspent_r(FILE *__restrict stream, struct spwd *__restrict resultbuf,
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169 | char *__restrict buffer, size_t buflen,
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170 | struct spwd **__restrict result);
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171 | struct spwd *fgetspent(FILE *stream)
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172 | {
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173 | static char buffer[PWD_BUFFER_SIZE];
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174 | static struct spwd resultbuf;
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175 | struct spwd *result;
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176 |
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177 | fgetspent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
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178 | return result;
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179 | }
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180 |
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181 | #endif
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182 | /**********************************************************************/
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183 | #ifdef L_sgetspent_r
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184 |
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185 | int sgetspent_r(const char *string, struct spwd *result_buf,
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186 | char *buffer, size_t buflen, struct spwd **result)
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187 | {
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188 | int rv = ERANGE;
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189 |
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190 | *result = NULL;
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191 |
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192 | if (buflen < PWD_BUFFER_SIZE) {
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193 | DO_ERANGE:
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194 | errno=rv;
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195 | goto DONE;
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196 | }
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197 |
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198 | if (string != buffer) {
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199 | if (strlen(string) >= buflen) {
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200 | goto DO_ERANGE;
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201 | }
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202 | strcpy(buffer, string);
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203 | }
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204 |
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205 | if (!(rv = __parsespent(result_buf, buffer))) {
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206 | *result = result_buf;
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207 | }
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208 |
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209 | DONE:
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210 | return rv;
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211 | }
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212 |
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213 | #endif
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214 | /**********************************************************************/
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215 |
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216 | #ifdef GETXXKEY_R_FUNC
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217 | #error GETXXKEY_R_FUNC is already defined!
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218 | #endif
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219 |
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220 | #ifdef L_getpwnam_r
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221 | #define GETXXKEY_R_FUNC getpwnam_r
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222 | #define GETXXKEY_R_PARSER __parsepwent
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223 | #define GETXXKEY_R_ENTTYPE struct passwd
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224 | #define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->pw_name, key))
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225 | #define DO_GETXXKEY_R_KEYTYPE const char *__restrict
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226 | #define DO_GETXXKEY_R_PATHNAME _PATH_PASSWD
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227 | #include "pwd_grp_internal.c"
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228 | #endif
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229 |
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230 | #ifdef L_getgrnam_r
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231 | #define GETXXKEY_R_FUNC getgrnam_r
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232 | #define GETXXKEY_R_PARSER __parsegrent
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233 | #define GETXXKEY_R_ENTTYPE struct group
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234 | #define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->gr_name, key))
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235 | #define DO_GETXXKEY_R_KEYTYPE const char *__restrict
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236 | #define DO_GETXXKEY_R_PATHNAME _PATH_GROUP
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237 | #include "pwd_grp_internal.c"
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238 | #endif
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239 |
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240 | #ifdef L_getspnam_r
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241 | #define GETXXKEY_R_FUNC getspnam_r
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242 | #define GETXXKEY_R_PARSER __parsespent
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243 | #define GETXXKEY_R_ENTTYPE struct spwd
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244 | #define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->sp_namp, key))
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245 | #define DO_GETXXKEY_R_KEYTYPE const char *__restrict
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246 | #define DO_GETXXKEY_R_PATHNAME _PATH_SHADOW
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247 | #include "pwd_grp_internal.c"
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248 | #endif
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249 |
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250 | #ifdef L_getpwuid_r
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251 | #define GETXXKEY_R_FUNC getpwuid_r
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252 | #define GETXXKEY_R_PARSER __parsepwent
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253 | #define GETXXKEY_R_ENTTYPE struct passwd
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254 | #define GETXXKEY_R_TEST(ENT) ((ENT)->pw_uid == key)
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255 | #define DO_GETXXKEY_R_KEYTYPE uid_t
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256 | #define DO_GETXXKEY_R_PATHNAME _PATH_PASSWD
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257 | #include "pwd_grp_internal.c"
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258 | #endif
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259 |
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260 | #ifdef L_getgrgid_r
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261 | #define GETXXKEY_R_FUNC getgrgid_r
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262 | #define GETXXKEY_R_PARSER __parsegrent
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263 | #define GETXXKEY_R_ENTTYPE struct group
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264 | #define GETXXKEY_R_TEST(ENT) ((ENT)->gr_gid == key)
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265 | #define DO_GETXXKEY_R_KEYTYPE gid_t
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266 | #define DO_GETXXKEY_R_PATHNAME _PATH_GROUP
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267 | #include "pwd_grp_internal.c"
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268 | #endif
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269 |
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270 | /**********************************************************************/
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271 | #ifdef L_getpwuid
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272 |
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273 | struct passwd *getpwuid(uid_t uid)
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274 | {
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275 | static char buffer[PWD_BUFFER_SIZE];
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276 | static struct passwd resultbuf;
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277 | struct passwd *result;
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278 |
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279 | getpwuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result);
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280 | return result;
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281 | }
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282 |
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283 | #endif
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284 | /**********************************************************************/
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285 | #ifdef L_getgrgid
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286 |
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287 | struct group *getgrgid(gid_t gid)
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288 | {
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289 | static char buffer[GRP_BUFFER_SIZE];
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290 | static struct group resultbuf;
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291 | struct group *result;
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292 |
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293 | getgrgid_r(gid, &resultbuf, buffer, sizeof(buffer), &result);
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294 | return result;
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295 | }
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296 |
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297 | #endif
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298 | /**********************************************************************/
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299 | #ifdef L_getspuid_r
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300 |
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301 | /* This function is non-standard and is currently not built. It seems
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302 | * to have been created as a reentrant version of the non-standard
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303 | * functions getspuid. Why getspuid was added, I do not know. */
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304 |
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305 | int getspuid_r(uid_t uid, struct spwd *__restrict resultbuf,
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306 | char *__restrict buffer, size_t buflen,
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307 | struct spwd **__restrict result)
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308 | {
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309 | int rv;
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310 | struct passwd *pp;
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311 | struct passwd password;
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312 | char pwd_buff[PWD_BUFFER_SIZE];
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313 |
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314 | *result = NULL;
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315 | if (!(rv = getpwuid_r(uid, &password, pwd_buff, sizeof(pwd_buff), &pp))) {
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316 | rv = getspnam_r(password.pw_name, resultbuf, buffer, buflen, result);
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317 | }
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318 |
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319 | return rv;
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320 | }
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321 |
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322 | #endif
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323 | /**********************************************************************/
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324 | #ifdef L_getspuid
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325 |
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326 | /* This function is non-standard and is currently not built.
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327 | * Why it was added, I do not know. */
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328 |
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329 | struct spwd *getspuid(uid_t uid)
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330 | {
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331 | static char buffer[PWD_BUFFER_SIZE];
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332 | static struct spwd resultbuf;
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333 | struct spwd *result;
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334 |
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335 | getspuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result);
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336 | return result;
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337 | }
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338 |
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339 | #endif
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340 | /**********************************************************************/
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341 | #ifdef L_getpwnam
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342 |
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343 | struct passwd *getpwnam(const char *name)
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344 | {
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345 | static char buffer[PWD_BUFFER_SIZE];
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346 | static struct passwd resultbuf;
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347 | struct passwd *result;
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348 |
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349 | getpwnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
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350 | return result;
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351 | }
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352 |
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353 | #endif
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354 | /**********************************************************************/
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355 | #ifdef L_getgrnam
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356 |
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357 | struct group *getgrnam(const char *name)
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358 | {
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359 | static char buffer[GRP_BUFFER_SIZE];
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360 | static struct group resultbuf;
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361 | struct group *result;
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362 |
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363 | getgrnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
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364 | return result;
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365 | }
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366 |
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367 | #endif
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368 | /**********************************************************************/
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369 | #ifdef L_getspnam
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370 |
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371 | struct spwd *getspnam(const char *name)
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372 | {
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373 | static char buffer[PWD_BUFFER_SIZE];
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374 | static struct spwd resultbuf;
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375 | struct spwd *result;
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376 |
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377 | getspnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
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378 | return result;
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379 | }
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380 |
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381 | #endif
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382 | /**********************************************************************/
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383 | #ifdef L_getpw
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384 |
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385 | int getpw(uid_t uid, char *buf)
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386 | {
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387 | struct passwd resultbuf;
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388 | struct passwd *result;
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389 | char buffer[PWD_BUFFER_SIZE];
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390 |
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391 | if (!buf) {
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392 | errno=EINVAL;
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393 | } else if (!getpwuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result)) {
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394 | if (sprintf(buf, "%s:%s:%lu:%lu:%s:%s:%s\n",
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395 | resultbuf.pw_name, resultbuf.pw_passwd,
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396 | (unsigned long)(resultbuf.pw_uid),
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397 | (unsigned long)(resultbuf.pw_gid),
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398 | resultbuf.pw_gecos, resultbuf.pw_dir,
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399 | resultbuf.pw_shell) >= 0
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400 | ) {
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401 | return 0;
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402 | }
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403 | }
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404 |
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405 | return -1;
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406 | }
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407 |
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408 | #endif
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409 | /**********************************************************************/
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410 |
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411 | #if defined(L_getpwent_r) || defined(L_getgrent_r) || defined(L_getspent_r)
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412 | #if defined CONFIG_USE_BB_THREADSAFE_SHADOW && defined PTHREAD_MUTEX_INITIALIZER
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413 | static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
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414 | # define LOCK pthread_mutex_lock(&mylock)
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415 | # define UNLOCK pthread_mutex_unlock(&mylock);
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416 | #else
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417 | # define LOCK ((void) 0)
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418 | # define UNLOCK ((void) 0)
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419 | #endif
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420 | #endif
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421 |
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422 | #ifdef L_getpwent_r
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423 | static FILE *pwf /*= NULL*/;
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424 | void setpwent(void)
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425 | {
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426 | LOCK;
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427 | if (pwf) {
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428 | rewind(pwf);
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429 | }
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430 | UNLOCK;
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431 | }
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432 |
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433 | void endpwent(void)
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434 | {
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435 | LOCK;
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436 | if (pwf) {
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437 | fclose(pwf);
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438 | pwf = NULL;
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439 | }
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440 | UNLOCK;
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441 | }
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442 |
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443 |
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444 | int getpwent_r(struct passwd *__restrict resultbuf,
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445 | char *__restrict buffer, size_t buflen,
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446 | struct passwd **__restrict result)
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447 | {
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448 | int rv;
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449 |
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450 | LOCK;
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451 | *result = NULL; /* In case of error... */
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452 |
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453 | if (!pwf) {
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454 | if (!(pwf = fopen(_PATH_PASSWD, "r"))) {
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455 | rv = errno;
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456 | goto ERR;
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457 | }
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458 | }
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459 |
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460 | if (!(rv = __pgsreader(__parsepwent, resultbuf,
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461 | buffer, buflen, pwf))) {
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462 | *result = resultbuf;
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463 | }
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464 |
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465 | ERR:
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466 | UNLOCK;
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467 | return rv;
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468 | }
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469 |
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470 | #endif
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471 | /**********************************************************************/
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472 | #ifdef L_getgrent_r
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473 |
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474 | static FILE *grf /*= NULL*/;
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475 | void setgrent(void)
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476 | {
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477 | LOCK;
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478 | if (grf) {
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479 | rewind(grf);
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480 | }
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481 | UNLOCK;
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482 | }
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483 |
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484 | void endgrent(void)
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485 | {
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486 | LOCK;
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487 | if (grf) {
|
---|
488 | fclose(grf);
|
---|
489 | grf = NULL;
|
---|
490 | }
|
---|
491 | UNLOCK;
|
---|
492 | }
|
---|
493 |
|
---|
494 | int getgrent_r(struct group *__restrict resultbuf,
|
---|
495 | char *__restrict buffer, size_t buflen,
|
---|
496 | struct group **__restrict result)
|
---|
497 | {
|
---|
498 | int rv;
|
---|
499 |
|
---|
500 | LOCK;
|
---|
501 | *result = NULL; /* In case of error... */
|
---|
502 |
|
---|
503 | if (!grf) {
|
---|
504 | if (!(grf = fopen(_PATH_GROUP, "r"))) {
|
---|
505 | rv = errno;
|
---|
506 | goto ERR;
|
---|
507 | }
|
---|
508 | }
|
---|
509 |
|
---|
510 | if (!(rv = __pgsreader(__parsegrent, resultbuf,
|
---|
511 | buffer, buflen, grf))) {
|
---|
512 | *result = resultbuf;
|
---|
513 | }
|
---|
514 |
|
---|
515 | ERR:
|
---|
516 | UNLOCK;
|
---|
517 | return rv;
|
---|
518 | }
|
---|
519 |
|
---|
520 | #endif
|
---|
521 | /**********************************************************************/
|
---|
522 | #ifdef L_getspent_r
|
---|
523 |
|
---|
524 | static FILE *spf /*= NULL*/;
|
---|
525 | void setspent(void)
|
---|
526 | {
|
---|
527 | LOCK;
|
---|
528 | if (spf) {
|
---|
529 | rewind(spf);
|
---|
530 | }
|
---|
531 | UNLOCK;
|
---|
532 | }
|
---|
533 |
|
---|
534 | void endspent(void)
|
---|
535 | {
|
---|
536 | LOCK;
|
---|
537 | if (spf) {
|
---|
538 | fclose(spf);
|
---|
539 | spf = NULL;
|
---|
540 | }
|
---|
541 | UNLOCK;
|
---|
542 | }
|
---|
543 |
|
---|
544 | int getspent_r(struct spwd *resultbuf, char *buffer,
|
---|
545 | size_t buflen, struct spwd **result)
|
---|
546 | {
|
---|
547 | int rv;
|
---|
548 |
|
---|
549 | LOCK;
|
---|
550 | *result = NULL; /* In case of error... */
|
---|
551 |
|
---|
552 | if (!spf) {
|
---|
553 | if (!(spf = fopen(_PATH_SHADOW, "r"))) {
|
---|
554 | rv = errno;
|
---|
555 | goto ERR;
|
---|
556 | }
|
---|
557 | }
|
---|
558 |
|
---|
559 | if (!(rv = __pgsreader(__parsespent, resultbuf,
|
---|
560 | buffer, buflen, spf))) {
|
---|
561 | *result = resultbuf;
|
---|
562 | }
|
---|
563 |
|
---|
564 | ERR:
|
---|
565 | UNLOCK;
|
---|
566 | return rv;
|
---|
567 | }
|
---|
568 |
|
---|
569 | #endif
|
---|
570 | /**********************************************************************/
|
---|
571 | #ifdef L_getpwent
|
---|
572 |
|
---|
573 | struct passwd *getpwent(void)
|
---|
574 | {
|
---|
575 | static char line_buff[PWD_BUFFER_SIZE];
|
---|
576 | static struct passwd pwd;
|
---|
577 | struct passwd *result;
|
---|
578 |
|
---|
579 | getpwent_r(&pwd, line_buff, sizeof(line_buff), &result);
|
---|
580 | return result;
|
---|
581 | }
|
---|
582 |
|
---|
583 | #endif
|
---|
584 | /**********************************************************************/
|
---|
585 | #ifdef L_getgrent
|
---|
586 |
|
---|
587 | struct group *getgrent(void)
|
---|
588 | {
|
---|
589 | static char line_buff[GRP_BUFFER_SIZE];
|
---|
590 | static struct group gr;
|
---|
591 | struct group *result;
|
---|
592 |
|
---|
593 | getgrent_r(&gr, line_buff, sizeof(line_buff), &result);
|
---|
594 | return result;
|
---|
595 | }
|
---|
596 |
|
---|
597 | #endif
|
---|
598 | /**********************************************************************/
|
---|
599 | #ifdef L_getspent
|
---|
600 |
|
---|
601 | struct spwd *getspent(void)
|
---|
602 | {
|
---|
603 | static char line_buff[PWD_BUFFER_SIZE];
|
---|
604 | static struct spwd spwd;
|
---|
605 | struct spwd *result;
|
---|
606 |
|
---|
607 | getspent_r(&spwd, line_buff, sizeof(line_buff), &result);
|
---|
608 | return result;
|
---|
609 | }
|
---|
610 |
|
---|
611 | #endif
|
---|
612 | /**********************************************************************/
|
---|
613 | #ifdef L_sgetspent
|
---|
614 |
|
---|
615 | struct spwd *sgetspent(const char *string)
|
---|
616 | {
|
---|
617 | static char line_buff[PWD_BUFFER_SIZE];
|
---|
618 | static struct spwd spwd;
|
---|
619 | struct spwd *result;
|
---|
620 |
|
---|
621 | sgetspent_r(string, &spwd, line_buff, sizeof(line_buff), &result);
|
---|
622 | return result;
|
---|
623 | }
|
---|
624 |
|
---|
625 | #endif
|
---|
626 | /**********************************************************************/
|
---|
627 | #ifdef L_initgroups
|
---|
628 |
|
---|
629 | int initgroups(const char *user, gid_t gid)
|
---|
630 | {
|
---|
631 | FILE *grfile;
|
---|
632 | gid_t *group_list;
|
---|
633 | int num_groups, rv;
|
---|
634 | char **m;
|
---|
635 | struct group group;
|
---|
636 | char buff[PWD_BUFFER_SIZE];
|
---|
637 |
|
---|
638 | rv = -1;
|
---|
639 |
|
---|
640 | /* We alloc space for 8 gids at a time. */
|
---|
641 | if (((group_list = (gid_t *) malloc(8*sizeof(gid_t *))) != NULL)
|
---|
642 | && ((grfile = fopen(_PATH_GROUP, "r")) != NULL)
|
---|
643 | ) {
|
---|
644 |
|
---|
645 | *group_list = gid;
|
---|
646 | num_groups = 1;
|
---|
647 |
|
---|
648 | while (!__pgsreader(__parsegrent, &group, buff, sizeof(buff), grfile)) {
|
---|
649 | assert(group.gr_mem); /* Must have at least a NULL terminator. */
|
---|
650 | if (group.gr_gid != gid) {
|
---|
651 | for (m=group.gr_mem ; *m ; m++) {
|
---|
652 | if (!strcmp(*m, user)) {
|
---|
653 | if (!(num_groups & 7)) {
|
---|
654 | gid_t *tmp = (gid_t *)
|
---|
655 | realloc(group_list,
|
---|
656 | (num_groups+8) * sizeof(gid_t *));
|
---|
657 | if (!tmp) {
|
---|
658 | rv = -1;
|
---|
659 | goto DO_CLOSE;
|
---|
660 | }
|
---|
661 | group_list = tmp;
|
---|
662 | }
|
---|
663 | group_list[num_groups++] = group.gr_gid;
|
---|
664 | break;
|
---|
665 | }
|
---|
666 | }
|
---|
667 | }
|
---|
668 | }
|
---|
669 |
|
---|
670 | rv = setgroups(num_groups, group_list);
|
---|
671 | DO_CLOSE:
|
---|
672 | fclose(grfile);
|
---|
673 | }
|
---|
674 |
|
---|
675 | /* group_list will be NULL if initial malloc failed, which may trigger
|
---|
676 | * warnings from various malloc debuggers. */
|
---|
677 | free(group_list);
|
---|
678 | return rv;
|
---|
679 | }
|
---|
680 |
|
---|
681 | #endif
|
---|
682 | /**********************************************************************/
|
---|
683 | #ifdef L_putpwent
|
---|
684 |
|
---|
685 | int putpwent(const struct passwd *__restrict p, FILE *__restrict f)
|
---|
686 | {
|
---|
687 | int rv = -1;
|
---|
688 |
|
---|
689 | if (!p || !f) {
|
---|
690 | errno=EINVAL;
|
---|
691 | } else {
|
---|
692 | /* No extra thread locking is needed above what fprintf does. */
|
---|
693 | if (fprintf(f, "%s:%s:%lu:%lu:%s:%s:%s\n",
|
---|
694 | p->pw_name, p->pw_passwd,
|
---|
695 | (unsigned long)(p->pw_uid),
|
---|
696 | (unsigned long)(p->pw_gid),
|
---|
697 | p->pw_gecos, p->pw_dir, p->pw_shell) >= 0
|
---|
698 | ) {
|
---|
699 | rv = 0;
|
---|
700 | }
|
---|
701 | }
|
---|
702 |
|
---|
703 | return rv;
|
---|
704 | }
|
---|
705 |
|
---|
706 | #endif
|
---|
707 | /**********************************************************************/
|
---|
708 | #ifdef L_putgrent
|
---|
709 |
|
---|
710 | int putgrent(const struct group *__restrict p, FILE *__restrict f)
|
---|
711 | {
|
---|
712 | static const char format[] = ",%s";
|
---|
713 | char **m;
|
---|
714 | const char *fmt;
|
---|
715 | int rv = -1;
|
---|
716 |
|
---|
717 | if (!p || !f) { /* Sigh... glibc checks. */
|
---|
718 | errno=EINVAL;
|
---|
719 | } else {
|
---|
720 | if (fprintf(f, "%s:%s:%lu:",
|
---|
721 | p->gr_name, p->gr_passwd,
|
---|
722 | (unsigned long)(p->gr_gid)) >= 0
|
---|
723 | ) {
|
---|
724 |
|
---|
725 | fmt = format + 1;
|
---|
726 |
|
---|
727 | assert(p->gr_mem);
|
---|
728 | m = p->gr_mem;
|
---|
729 |
|
---|
730 | do {
|
---|
731 | if (!*m) {
|
---|
732 | if (fputc('\n', f) >= 0) {
|
---|
733 | rv = 0;
|
---|
734 | }
|
---|
735 | break;
|
---|
736 | }
|
---|
737 | if (fprintf(f, fmt, *m) < 0) {
|
---|
738 | break;
|
---|
739 | }
|
---|
740 | ++m;
|
---|
741 | fmt = format;
|
---|
742 | } while (1);
|
---|
743 |
|
---|
744 | }
|
---|
745 |
|
---|
746 | }
|
---|
747 |
|
---|
748 | return rv;
|
---|
749 | }
|
---|
750 |
|
---|
751 | #endif
|
---|
752 | /**********************************************************************/
|
---|
753 | #ifdef L_putspent
|
---|
754 |
|
---|
755 | static const unsigned char _sp_off[] = {
|
---|
756 | offsetof(struct spwd, sp_lstchg), /* 2 - not a char ptr */
|
---|
757 | offsetof(struct spwd, sp_min), /* 3 - not a char ptr */
|
---|
758 | offsetof(struct spwd, sp_max), /* 4 - not a char ptr */
|
---|
759 | offsetof(struct spwd, sp_warn), /* 5 - not a char ptr */
|
---|
760 | offsetof(struct spwd, sp_inact), /* 6 - not a char ptr */
|
---|
761 | offsetof(struct spwd, sp_expire), /* 7 - not a char ptr */
|
---|
762 | };
|
---|
763 |
|
---|
764 | int putspent(const struct spwd *p, FILE *stream)
|
---|
765 | {
|
---|
766 | static const char ld_format[] = "%ld:";
|
---|
767 | const char *f;
|
---|
768 | long int x;
|
---|
769 | int i;
|
---|
770 | int rv = -1;
|
---|
771 |
|
---|
772 | /* Unlike putpwent and putgrent, glibc does not check the args. */
|
---|
773 | if (fprintf(stream, "%s:%s:", p->sp_namp,
|
---|
774 | (p->sp_pwdp ? p->sp_pwdp : "")) < 0
|
---|
775 | ) {
|
---|
776 | goto DO_UNLOCK;
|
---|
777 | }
|
---|
778 |
|
---|
779 | for (i=0 ; i < sizeof(_sp_off) ; i++) {
|
---|
780 | f = ld_format;
|
---|
781 | if ((x = *(const long int *)(((const char *) p) + _sp_off[i])) == -1) {
|
---|
782 | f += 3;
|
---|
783 | }
|
---|
784 | if (fprintf(stream, f, x) < 0) {
|
---|
785 | goto DO_UNLOCK;
|
---|
786 | }
|
---|
787 | }
|
---|
788 |
|
---|
789 | if ((p->sp_flag != ~0UL) && (fprintf(stream, "%lu", p->sp_flag) < 0)) {
|
---|
790 | goto DO_UNLOCK;
|
---|
791 | }
|
---|
792 |
|
---|
793 | if (fputc('\n', stream) > 0) {
|
---|
794 | rv = 0;
|
---|
795 | }
|
---|
796 |
|
---|
797 | DO_UNLOCK:
|
---|
798 | return rv;
|
---|
799 | }
|
---|
800 |
|
---|
801 | #endif
|
---|
802 | /**********************************************************************/
|
---|
803 | /* Internal uClibc functions. */
|
---|
804 | /**********************************************************************/
|
---|
805 | #ifdef L___parsepwent
|
---|
806 |
|
---|
807 | static const unsigned char pw_off[] = {
|
---|
808 | offsetof(struct passwd, pw_name), /* 0 */
|
---|
809 | offsetof(struct passwd, pw_passwd), /* 1 */
|
---|
810 | offsetof(struct passwd, pw_uid), /* 2 - not a char ptr */
|
---|
811 | offsetof(struct passwd, pw_gid), /* 3 - not a char ptr */
|
---|
812 | offsetof(struct passwd, pw_gecos), /* 4 */
|
---|
813 | offsetof(struct passwd, pw_dir), /* 5 */
|
---|
814 | offsetof(struct passwd, pw_shell) /* 6 */
|
---|
815 | };
|
---|
816 |
|
---|
817 | int __parsepwent(void *data, char *line)
|
---|
818 | {
|
---|
819 | char *endptr;
|
---|
820 | char *p;
|
---|
821 | int i;
|
---|
822 |
|
---|
823 | i = 0;
|
---|
824 | do {
|
---|
825 | p = ((char *) ((struct passwd *) data)) + pw_off[i];
|
---|
826 |
|
---|
827 | if ((i & 6) ^ 2) { /* i!=2 and i!=3 */
|
---|
828 | *((char **) p) = line;
|
---|
829 | if (i==6) {
|
---|
830 | return 0;
|
---|
831 | }
|
---|
832 | /* NOTE: glibc difference - glibc allows omission of
|
---|
833 | * ':' seperators after the gid field if all remaining
|
---|
834 | * entries are empty. We require all separators. */
|
---|
835 | if (!(line = strchr(line, ':'))) {
|
---|
836 | break;
|
---|
837 | }
|
---|
838 | } else {
|
---|
839 | unsigned long t = strtoul(line, &endptr, 10);
|
---|
840 | /* Make sure we had at least one digit, and that the
|
---|
841 | * failing char is the next field seperator ':'. See
|
---|
842 | * glibc difference note above. */
|
---|
843 | /* TODO: Also check for leading whitespace? */
|
---|
844 | if ((endptr == line) || (*endptr != ':')) {
|
---|
845 | break;
|
---|
846 | }
|
---|
847 | line = endptr;
|
---|
848 | if (i & 1) { /* i == 3 -- gid */
|
---|
849 | *((gid_t *) p) = t;
|
---|
850 | } else { /* i == 2 -- uid */
|
---|
851 | *((uid_t *) p) = t;
|
---|
852 | }
|
---|
853 | }
|
---|
854 |
|
---|
855 | *line++ = 0;
|
---|
856 | ++i;
|
---|
857 | } while (1);
|
---|
858 |
|
---|
859 | return -1;
|
---|
860 | }
|
---|
861 |
|
---|
862 | #endif
|
---|
863 | /**********************************************************************/
|
---|
864 | #ifdef L___parsegrent
|
---|
865 |
|
---|
866 | static const unsigned char gr_off[] = {
|
---|
867 | offsetof(struct group, gr_name), /* 0 */
|
---|
868 | offsetof(struct group, gr_passwd), /* 1 */
|
---|
869 | offsetof(struct group, gr_gid) /* 2 - not a char ptr */
|
---|
870 | };
|
---|
871 |
|
---|
872 | int __parsegrent(void *data, char *line)
|
---|
873 | {
|
---|
874 | char *endptr;
|
---|
875 | char *p;
|
---|
876 | int i;
|
---|
877 | char **members;
|
---|
878 | char *end_of_buf;
|
---|
879 |
|
---|
880 | end_of_buf = ((struct group *) data)->gr_name; /* Evil hack! */
|
---|
881 | i = 0;
|
---|
882 | do {
|
---|
883 | p = ((char *) ((struct group *) data)) + gr_off[i];
|
---|
884 |
|
---|
885 | if (i < 2) {
|
---|
886 | *((char **) p) = line;
|
---|
887 | if (!(line = strchr(line, ':'))) {
|
---|
888 | break;
|
---|
889 | }
|
---|
890 | *line++ = 0;
|
---|
891 | ++i;
|
---|
892 | } else {
|
---|
893 | *((gid_t *) p) = strtoul(line, &endptr, 10);
|
---|
894 |
|
---|
895 | /* NOTE: glibc difference - glibc allows omission of the
|
---|
896 | * trailing colon when there is no member list. We treat
|
---|
897 | * this as an error. */
|
---|
898 |
|
---|
899 | /* Make sure we had at least one digit, and that the
|
---|
900 | * failing char is the next field seperator ':'. See
|
---|
901 | * glibc difference note above. */
|
---|
902 | if ((endptr == line) || (*endptr != ':')) {
|
---|
903 | break;
|
---|
904 | }
|
---|
905 |
|
---|
906 | i = 1; /* Count terminating NULL ptr. */
|
---|
907 | p = endptr;
|
---|
908 |
|
---|
909 | if (p[1]) { /* We have a member list to process. */
|
---|
910 | /* Overwrite the last ':' with a ',' before counting.
|
---|
911 | * This allows us to test for initial ',' and adds
|
---|
912 | * one ',' so that the ',' count equals the member
|
---|
913 | * count. */
|
---|
914 | *p = ',';
|
---|
915 | do {
|
---|
916 | /* NOTE: glibc difference - glibc allows and trims leading
|
---|
917 | * (but not trailing) space. We treat this as an error. */
|
---|
918 | /* NOTE: glibc difference - glibc allows consecutive and
|
---|
919 | * trailing commas, and ignores "empty string" users. We
|
---|
920 | * treat this as an error. */
|
---|
921 | if (*p == ',') {
|
---|
922 | ++i;
|
---|
923 | *p = 0; /* nul-terminate each member string. */
|
---|
924 | if (!*++p || (*p == ',') || isspace(*p)) {
|
---|
925 | goto ERR;
|
---|
926 | }
|
---|
927 | }
|
---|
928 | } while (*++p);
|
---|
929 | }
|
---|
930 |
|
---|
931 | /* Now align (p+1), rounding up. */
|
---|
932 | /* Assumes sizeof(char **) is a power of 2. */
|
---|
933 | members = (char **)( (((intptr_t) p) + sizeof(char **))
|
---|
934 | & ~((intptr_t)(sizeof(char **) - 1)) );
|
---|
935 |
|
---|
936 | if (((char *)(members + i)) > end_of_buf) { /* No space. */
|
---|
937 | break;
|
---|
938 | }
|
---|
939 |
|
---|
940 | ((struct group *) data)->gr_mem = members;
|
---|
941 |
|
---|
942 | if (--i) {
|
---|
943 | p = endptr; /* Pointing to char prior to first member. */
|
---|
944 | do {
|
---|
945 | *members++ = ++p;
|
---|
946 | if (!--i) break;
|
---|
947 | while (*++p) {}
|
---|
948 | } while (1);
|
---|
949 | }
|
---|
950 | *members = NULL;
|
---|
951 |
|
---|
952 | return 0;
|
---|
953 | }
|
---|
954 | } while (1);
|
---|
955 |
|
---|
956 | ERR:
|
---|
957 | return -1;
|
---|
958 | }
|
---|
959 |
|
---|
960 | #endif
|
---|
961 | /**********************************************************************/
|
---|
962 | #ifdef L___parsespent
|
---|
963 |
|
---|
964 | static const unsigned char sp_off[] = {
|
---|
965 | offsetof(struct spwd, sp_namp), /* 0 */
|
---|
966 | offsetof(struct spwd, sp_pwdp), /* 1 */
|
---|
967 | offsetof(struct spwd, sp_lstchg), /* 2 - not a char ptr */
|
---|
968 | offsetof(struct spwd, sp_min), /* 3 - not a char ptr */
|
---|
969 | offsetof(struct spwd, sp_max), /* 4 - not a char ptr */
|
---|
970 | offsetof(struct spwd, sp_warn), /* 5 - not a char ptr */
|
---|
971 | offsetof(struct spwd, sp_inact), /* 6 - not a char ptr */
|
---|
972 | offsetof(struct spwd, sp_expire), /* 7 - not a char ptr */
|
---|
973 | offsetof(struct spwd, sp_flag) /* 8 - not a char ptr */
|
---|
974 | };
|
---|
975 |
|
---|
976 | int __parsespent(void *data, char * line)
|
---|
977 | {
|
---|
978 | char *endptr;
|
---|
979 | char *p;
|
---|
980 | int i;
|
---|
981 |
|
---|
982 | i = 0;
|
---|
983 | do {
|
---|
984 | p = ((char *) ((struct spwd *) data)) + sp_off[i];
|
---|
985 | if (i < 2) {
|
---|
986 | *((char **) p) = line;
|
---|
987 | if (!(line = strchr(line, ':'))) {
|
---|
988 | break;
|
---|
989 | }
|
---|
990 | } else {
|
---|
991 | #if 0
|
---|
992 | if (i==5) { /* Support for old format. */
|
---|
993 | while (isspace(*line)) ++line; /* glibc eats space here. */
|
---|
994 | if (!*line) {
|
---|
995 | ((struct spwd *) data)->sp_warn = -1;
|
---|
996 | ((struct spwd *) data)->sp_inact = -1;
|
---|
997 | ((struct spwd *) data)->sp_expire = -1;
|
---|
998 | ((struct spwd *) data)->sp_flag = ~0UL;
|
---|
999 | return 0;
|
---|
1000 | }
|
---|
1001 | }
|
---|
1002 | #endif
|
---|
1003 |
|
---|
1004 | *((long *) p) = (long) strtoul(line, &endptr, 10);
|
---|
1005 |
|
---|
1006 | if (endptr == line) {
|
---|
1007 | *((long *) p) = ((i != 8) ? -1L : ((long)(~0UL)));
|
---|
1008 | }
|
---|
1009 |
|
---|
1010 | line = endptr;
|
---|
1011 |
|
---|
1012 | if (i == 8) {
|
---|
1013 | if (!*endptr) {
|
---|
1014 | return 0;
|
---|
1015 | }
|
---|
1016 | break;
|
---|
1017 | }
|
---|
1018 |
|
---|
1019 | if (*endptr != ':') {
|
---|
1020 | break;
|
---|
1021 | }
|
---|
1022 |
|
---|
1023 | }
|
---|
1024 |
|
---|
1025 | *line++ = 0;
|
---|
1026 | ++i;
|
---|
1027 | } while (1);
|
---|
1028 |
|
---|
1029 | return EINVAL;
|
---|
1030 | }
|
---|
1031 |
|
---|
1032 | #endif
|
---|
1033 | /**********************************************************************/
|
---|
1034 | #ifdef L___pgsreader
|
---|
1035 |
|
---|
1036 | /* Reads until if EOF, or until if finds a line which fits in the buffer
|
---|
1037 | * and for which the parser function succeeds.
|
---|
1038 | *
|
---|
1039 | * Returns 0 on success and ENOENT for end-of-file (glibc concession).
|
---|
1040 | */
|
---|
1041 |
|
---|
1042 | int __pgsreader(int (*__parserfunc)(void *d, char *line), void *data,
|
---|
1043 | char *__restrict line_buff, size_t buflen, FILE *f)
|
---|
1044 | {
|
---|
1045 | int line_len;
|
---|
1046 | int skip;
|
---|
1047 | int rv = ERANGE;
|
---|
1048 |
|
---|
1049 | if (buflen < PWD_BUFFER_SIZE) {
|
---|
1050 | errno=rv;
|
---|
1051 | } else {
|
---|
1052 | skip = 0;
|
---|
1053 | do {
|
---|
1054 | if (!fgets(line_buff, buflen, f)) {
|
---|
1055 | if (feof(f)) {
|
---|
1056 | rv = ENOENT;
|
---|
1057 | }
|
---|
1058 | break;
|
---|
1059 | }
|
---|
1060 |
|
---|
1061 | line_len = strlen(line_buff) - 1; /* strlen() must be > 0. */
|
---|
1062 | if (line_buff[line_len] == '\n') {
|
---|
1063 | line_buff[line_len] = 0;
|
---|
1064 | } else if (line_len + 2 == buflen) { /* line too long */
|
---|
1065 | ++skip;
|
---|
1066 | continue;
|
---|
1067 | }
|
---|
1068 |
|
---|
1069 | if (skip) {
|
---|
1070 | --skip;
|
---|
1071 | continue;
|
---|
1072 | }
|
---|
1073 |
|
---|
1074 | /* NOTE: glibc difference - glibc strips leading whitespace from
|
---|
1075 | * records. We do not allow leading whitespace. */
|
---|
1076 |
|
---|
1077 | /* Skip empty lines, comment lines, and lines with leading
|
---|
1078 | * whitespace. */
|
---|
1079 | if (*line_buff && (*line_buff != '#') && !isspace(*line_buff)) {
|
---|
1080 | if (__parserfunc == __parsegrent) { /* Do evil group hack. */
|
---|
1081 | /* The group entry parsing function needs to know where
|
---|
1082 | * the end of the buffer is so that it can construct the
|
---|
1083 | * group member ptr table. */
|
---|
1084 | ((struct group *) data)->gr_name = line_buff + buflen;
|
---|
1085 | }
|
---|
1086 |
|
---|
1087 | if (!__parserfunc(data, line_buff)) {
|
---|
1088 | rv = 0;
|
---|
1089 | break;
|
---|
1090 | }
|
---|
1091 | }
|
---|
1092 | } while (1);
|
---|
1093 |
|
---|
1094 | }
|
---|
1095 |
|
---|
1096 | return rv;
|
---|
1097 | }
|
---|
1098 |
|
---|
1099 | #endif
|
---|
1100 | /**********************************************************************/
|
---|