1 .\" Copyright (c) 1995 David Nugent <davidn@blaze.net.au>
2 .\" All rights reserved.
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, is permitted provided that the following conditions
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13 .\" 3. This work was done expressly for inclusion into FreeBSD. Other use
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28 .Nm setclassenvironment ,
29 .Nm setclassresources ,
31 .Nd "functions for using the login class capabilities database"
38 .Fn setclasscontext "const char *classname" "unsigned int flags"
40 .Fn setclasscpumask "login_cap_t *lc"
42 .Fn setclassenvironment "login_cap_t *lc" "const struct passwd *pwd" "int paths"
44 .Fn setclassresources "login_cap_t *lc"
46 .Fn setusercontext "login_cap_t *lc" "const struct passwd *pwd" "uid_t uid" "unsigned int flags"
48 These functions provide a higher level interface to the login class
49 database than those documented in
51 These functions are used to set resource limits, environment and
52 accounting settings for users on logging into the system and when
53 selecting an appropriate set of environment and resource settings
54 for system daemons based on login classes.
55 These functions may only be called if the current process is
56 running with root privileges.
57 If the LOGIN_SETLOGIN flag is used this function calls
59 and due care must be taken as detailed in the manpage for that
60 function and this affects all processes running in the same session
61 and not just the current process.
65 function sets various class context values (resource limits, umask and
66 process priorities) based on values for a specific named class.
70 function sets class context values based on a given login_cap_t
71 object and a specific passwd record (if login_cap_t is NULL),
72 the current session's login, and the current process
73 user and group ownership.
74 Each of these actions is selectable via bit-flags passed
77 parameter, which is comprised of one or more of the following:
78 .Bl -tag -width LOGIN_SETRESOURCES
80 Set the login associated with the current session to the user
81 specified in the passwd structure using
85 parameter must not be NULL if this option is used.
87 Set ownership of the current process to the uid specified in the
92 Set group ownership of the current process to the group id
93 specified in the passwd structure using
97 to set up the group access list for the current process.
100 parameter must not be NULL if this option is used.
101 .It LOGIN_SETRESOURCES
102 Set resource limits for the current process based on values
103 specified in the system login class database.
104 Class capability tags used, with and without -cur (soft limit)
105 or -max (hard limit) suffixes and the corresponding resource
109 filesize RLIMIT_FSIZE
111 stacksize RLIMIT_STACK
112 coredumpsize RLIMIT_CORE
114 memorylocked RLIMIT_MEMLOCK
116 openfiles RLIMIT_NOFILE
118 vmemoryuse RLIMIT_VMEM
120 .It LOGIN_SETPRIORITY
121 Set the scheduling priority for the current process based on the
122 value specified in the system login class database.
123 Class capability tags used:
128 Set the umask for the current process to a value in the user or
129 system login class database.
130 Class capability tags used:
135 Set the "path" and "manpath" environment variables based on values
136 in the user or system login class database.
137 Class capability tags used with the corresponding environment
144 Set various environment variables based on values in the user or
145 system login class database.
146 Class capability tags used with the corresponding environment
155 Additional environment variables may be set using the list type
156 capability "setenv=var1 val1,var2 val2..,varN valN".
158 Set the MAC label for the current process to the label specified
159 in system login class database.
164 and set the cpu affinity to the specified mask.
165 The string may contain a comma separated list of numbers and/or number
166 ranges as handled by the
168 utility or the case-insensitive string
172 no action will be taken.
174 Enables all of the above settings.
177 Note that when setting environment variables and a valid passwd
178 pointer is provided in the
180 parameter, the characters
184 are substituted for the user's home directory and login name
188 .Fn setclasscpumask ,
189 .Fn setclassresources
191 .Fn setclassenvironment
192 functions are subsets of the setcontext functions above, but may
193 be useful in isolation.
199 functions return -1 if an error occurred, or 0 on success.
200 If an error occurs when attempting to set the user, login, group
201 or resources, a message is reported to
203 with LOG_ERR priority and directed to the currently active facility.