1 | #
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2 | # For a description of the syntax of this configuration file,
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3 | # see scripts/kbuild/config-language.txt.
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4 | #
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5 |
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6 | menu "Login/Password Management Utilities"
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7 |
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8 | INSERT
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9 |
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10 | config FEATURE_SHADOWPASSWDS
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11 | bool "Support for shadow passwords"
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12 | default y
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13 | help
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14 | Build support for shadow password in /etc/shadow. This file is only
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15 | readable by root and thus the encrypted passwords are no longer
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16 | publicly readable.
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17 |
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18 | config USE_BB_PWD_GRP
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19 | bool "Use internal password and group functions rather than system functions"
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20 | default y
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21 | help
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22 | If you leave this disabled, busybox will use the system's password
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23 | and group functions. And if you are using the GNU C library
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24 | (glibc), you will then need to install the /etc/nsswitch.conf
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25 | configuration file and the required /lib/libnss_* libraries in
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26 | order for the password and group functions to work. This generally
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27 | makes your embedded system quite a bit larger.
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28 |
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29 | Enabling this option will cause busybox to directly access the
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30 | system's /etc/password, /etc/group files (and your system will be
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31 | smaller, and I will get fewer emails asking about how glibc NSS
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32 | works). When this option is enabled, you will not be able to use
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33 | PAM to access remote LDAP password servers and whatnot. And if you
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34 | want hostname resolution to work with glibc, you still need the
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35 | /lib/libnss_* libraries.
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36 |
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37 | If you need to use glibc's nsswitch.conf mechanism
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38 | (e.g. if user/group database is NOT stored in /etc/passwd etc),
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39 | you must NOT use this option.
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40 |
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41 | If you enable this option, it will add about 1.5k.
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42 |
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43 | config USE_BB_SHADOW
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44 | bool "Use internal shadow password functions"
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45 | default y
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46 | depends on USE_BB_PWD_GRP && FEATURE_SHADOWPASSWDS
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47 | help
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48 | If you leave this disabled, busybox will use the system's shadow
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49 | password handling functions. And if you are using the GNU C library
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50 | (glibc), you will then need to install the /etc/nsswitch.conf
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51 | configuration file and the required /lib/libnss_* libraries in
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52 | order for the shadow password functions to work. This generally
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53 | makes your embedded system quite a bit larger.
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54 |
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55 | Enabling this option will cause busybox to directly access the
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56 | system's /etc/shadow file when handling shadow passwords. This
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57 | makes your system smaller (and I will get fewer emails asking about
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58 | how glibc NSS works). When this option is enabled, you will not be
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59 | able to use PAM to access shadow passwords from remote LDAP
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60 | password servers and whatnot.
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61 |
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62 | config USE_BB_CRYPT
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63 | bool "Use internal crypt functions"
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64 | default y
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65 | help
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66 | Busybox has internal DES and MD5 crypt functions.
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67 | They produce results which are identical to corresponding
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68 | standard C library functions.
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69 |
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70 | If you leave this disabled, busybox will use the system's
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71 | crypt functions. Most C libraries use large (~70k)
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72 | static buffers there, and also combine them with more general
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73 | DES encryption/decryption.
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74 |
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75 | For busybox, having large static buffers is undesirable,
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76 | especially on NOMMU machines. Busybox also doesn't need
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77 | DES encryption/decryption and can do with smaller code.
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78 |
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79 | If you enable this option, it will add about 4.8k of code
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80 | if you are building dynamically linked executable.
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81 | In static build, it makes code _smaller_ by about 1.2k,
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82 | and likely many kilobytes less of bss.
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83 |
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84 | config USE_BB_CRYPT_SHA
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85 | bool "Enable SHA256/512 crypt functions"
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86 | default y
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87 | depends on USE_BB_CRYPT
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88 | help
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89 | Enable this if you have passwords starting with "$5$" or "$6$"
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90 | in your /etc/passwd or /etc/shadow files. These passwords
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91 | are hashed using SHA256 and SHA512 algorithms. Support for them
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92 | was added to glibc in 2008.
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93 | With this option off, login will fail password check for any
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94 | user which has password encrypted with these algorithms.
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95 |
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96 | config ADDUSER
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97 | bool "adduser"
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98 | default y
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99 | help
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100 | Utility for creating a new user account.
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101 |
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102 | config FEATURE_ADDUSER_LONG_OPTIONS
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103 | bool "Enable long options"
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104 | default y
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105 | depends on ADDUSER && LONG_OPTS
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106 | help
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107 | Support long options for the adduser applet.
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108 |
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109 | config FEATURE_CHECK_NAMES
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110 | bool "Enable sanity check on user/group names in adduser and addgroup"
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111 | default n
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112 | depends on ADDUSER || ADDGROUP
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113 | help
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114 | Enable sanity check on user and group names in adduser and addgroup.
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115 | To avoid problems, the user or group name should consist only of
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116 | letters, digits, underscores, periods, at signs and dashes,
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117 | and not start with a dash (as defined by IEEE Std 1003.1-2001).
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118 | For compatibility with Samba machine accounts "$" is also supported
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119 | at the end of the user or group name.
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120 |
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121 | config FIRST_SYSTEM_ID
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122 | int "First valid system uid or gid for adduser and addgroup"
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123 | depends on ADDUSER || ADDGROUP
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124 | range 0 64900
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125 | default 100
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126 | help
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127 | First valid system uid or gid for adduser and addgroup
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128 |
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129 | config LAST_SYSTEM_ID
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130 | int "Last valid system uid or gid for adduser and addgroup"
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131 | depends on ADDUSER || ADDGROUP
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132 | range 0 64900
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133 | default 999
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134 | help
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135 | Last valid system uid or gid for adduser and addgroup
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136 |
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137 | config ADDGROUP
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138 | bool "addgroup"
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139 | default y
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140 | help
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141 | Utility for creating a new group account.
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142 |
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143 | config FEATURE_ADDGROUP_LONG_OPTIONS
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144 | bool "Enable long options"
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145 | default y
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146 | depends on ADDGROUP && LONG_OPTS
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147 | help
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148 | Support long options for the addgroup applet.
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149 |
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150 | config FEATURE_ADDUSER_TO_GROUP
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151 | bool "Support for adding users to groups"
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152 | default y
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153 | depends on ADDGROUP
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154 | help
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155 | If called with two non-option arguments,
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156 | addgroup will add an existing user to an
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157 | existing group.
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158 |
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159 | config DELUSER
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160 | bool "deluser"
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161 | default y
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162 | help
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163 | Utility for deleting a user account.
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164 |
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165 | config DELGROUP
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166 | bool "delgroup"
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167 | default y
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168 | help
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169 | Utility for deleting a group account.
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170 |
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171 | config FEATURE_DEL_USER_FROM_GROUP
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172 | bool "Support for removing users from groups"
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173 | default y
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174 | depends on DELGROUP
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175 | help
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176 | If called with two non-option arguments, deluser
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177 | or delgroup will remove an user from a specified group.
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178 |
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179 | config GETTY
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180 | bool "getty"
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181 | default y
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182 | select FEATURE_SYSLOG
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183 | help
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184 | getty lets you log in on a tty. It is normally invoked by init.
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185 |
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186 | Note that you can save a few bytes by disabling it and
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187 | using login applet directly.
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188 | If you need to reset tty attributes before calling login,
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189 | this script approximates getty:
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190 |
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191 | exec </dev/$1 >/dev/$1 2>&1 || exit 1
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192 | reset
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193 | stty sane; stty ispeed 38400; stty ospeed 38400
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194 | printf "%s login: " "`hostname`"
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195 | read -r login
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196 | exec /bin/login "$login"
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197 |
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198 | config LOGIN
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199 | bool "login"
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200 | default y
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201 | select FEATURE_SYSLOG
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202 | help
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203 | login is used when signing onto a system.
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204 |
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205 | Note that Busybox binary must be setuid root for this applet to
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206 | work properly.
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207 |
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208 | config LOGIN_SESSION_AS_CHILD
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209 | bool "Run logged in session in a child process"
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210 | default y if PAM
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211 | depends on LOGIN
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212 | help
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213 | Run the logged in session in a child process. This allows
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214 | login to clean up things such as utmp entries or PAM sessions
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215 | when the login session is complete. If you use PAM, you
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216 | almost always would want this to be set to Y, else PAM session
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217 | will not be cleaned up.
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218 |
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219 | config PAM
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220 | bool "Support for PAM (Pluggable Authentication Modules)"
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221 | default n
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222 | depends on LOGIN
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223 | help
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224 | Use PAM in login(1) instead of direct access to password database.
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225 |
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226 | config LOGIN_SCRIPTS
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227 | bool "Support for login scripts"
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228 | depends on LOGIN
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229 | default y
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230 | help
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231 | Enable this if you want login to execute $LOGIN_PRE_SUID_SCRIPT
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232 | just prior to switching from root to logged-in user.
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233 |
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234 | config FEATURE_NOLOGIN
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235 | bool "Support for /etc/nologin"
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236 | default y
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237 | depends on LOGIN
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238 | help
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239 | The file /etc/nologin is used by (some versions of) login(1).
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240 | If it exists, non-root logins are prohibited.
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241 |
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242 | config FEATURE_SECURETTY
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243 | bool "Support for /etc/securetty"
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244 | default y
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245 | depends on LOGIN
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246 | help
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247 | The file /etc/securetty is used by (some versions of) login(1).
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248 | The file contains the device names of tty lines (one per line,
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249 | without leading /dev/) on which root is allowed to login.
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250 |
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251 | config PASSWD
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252 | bool "passwd"
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253 | default y
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254 | select FEATURE_SYSLOG
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255 | help
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256 | passwd changes passwords for user and group accounts. A normal user
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257 | may only change the password for his/her own account, the super user
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258 | may change the password for any account. The administrator of a group
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259 | may change the password for the group.
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260 |
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261 | Note that Busybox binary must be setuid root for this applet to
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262 | work properly.
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263 |
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264 | config FEATURE_PASSWD_WEAK_CHECK
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265 | bool "Check new passwords for weakness"
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266 | default y
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267 | depends on PASSWD
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268 | help
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269 | With this option passwd will refuse new passwords which are "weak".
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270 |
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271 | config CRYPTPW
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272 | bool "cryptpw"
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273 | default y
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274 | help
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275 | Encrypts the given password with the crypt(3) libc function
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276 | using the given salt. Debian has this utility under mkpasswd
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277 | name. Busybox provides mkpasswd as an alias for cryptpw.
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278 |
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279 | config CHPASSWD
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280 | bool "chpasswd"
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281 | default y
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282 | help
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283 | Reads a file of user name and password pairs from standard input
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284 | and uses this information to update a group of existing users.
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285 |
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286 | config FEATURE_DEFAULT_PASSWD_ALGO
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287 | string "Default password encryption method (passwd -a, cryptpw -m parameter)"
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288 | default "des"
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289 | depends on PASSWD || CRYPTPW
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290 | help
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291 | Possible choices are "d[es]", "m[d5]", "s[ha256]" or "sha512".
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292 |
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293 | config SU
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294 | bool "su"
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295 | default y
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296 | select FEATURE_SYSLOG
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297 | help
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298 | su is used to become another user during a login session.
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299 | Invoked without a username, su defaults to becoming the super user.
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300 |
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301 | Note that Busybox binary must be setuid root for this applet to
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302 | work properly.
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303 |
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304 | config FEATURE_SU_SYSLOG
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305 | bool "Enable su to write to syslog"
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306 | default y
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307 | depends on SU
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308 |
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309 | config FEATURE_SU_CHECKS_SHELLS
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310 | bool "Enable su to check user's shell to be listed in /etc/shells"
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311 | depends on SU
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312 | default y
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313 |
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314 | config SULOGIN
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315 | bool "sulogin"
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316 | default y
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317 | select FEATURE_SYSLOG
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318 | help
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319 | sulogin is invoked when the system goes into single user
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320 | mode (this is done through an entry in inittab).
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321 |
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322 | config VLOCK
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323 | bool "vlock"
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324 | default y
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325 | help
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326 | Build the "vlock" applet which allows you to lock (virtual) terminals.
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327 |
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328 | Note that Busybox binary must be setuid root for this applet to
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329 | work properly.
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330 |
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331 | endmenu
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