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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2021-01-30 08:54:25 +0100 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2021-01-30 08:55:14 +0100 |
| commit | 241b015a62b75ca349d66a2cf78033279e3c479e (patch) | |
| tree | db9c054c8ac4adcebd77082b3a3e3193c8ca0eed /man7 | |
| parent | 37147e18b6cb697e3f52de8d561afe6bca8ecd08 (diff) | |
| download | man-pages-241b015a62b75ca349d66a2cf78033279e3c479e.tar.gz | |
environ.7: Various edits to Bastien Roucariès's patch
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Diffstat (limited to 'man7')
| -rw-r--r-- | man7/environ.7 | 27 |
1 files changed, 12 insertions, 15 deletions
diff --git a/man7/environ.7 b/man7/environ.7 index 2a8a045c02..08ce4845b8 100644 --- a/man7/environ.7 +++ b/man7/environ.7 @@ -280,28 +280,25 @@ and operations can be used to control the location of the process's environment. .PP The -.B HOME, -.B LOGNAME, -.B SHELL +.BR HOME , +.BR LOGNAME , +.BR SHELL , and .B USER -variables are only set when an user is changing using -session management interface, typically by program +variables are set when the user is changed via a +session management interface, typically by a program such as .B login(1) -from user database (for instance, but not limited, by using -.B password (5) -database). -Particularly, -.BR setuid (2) -family of function -does not set theses variables. Notes that as documented, -going to root by -.BR su (8) +from a user database (such as +.BR passwd (5)). +(Switching to the root user using +.BR su (1) may result in a mixed environment where .B LOGNAME and .B USER -are retained from old user. +are retained from old user; see the +.BR su (1) +manual page.) .SH BUGS Clearly there is a security risk here. Many a system command has been |