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| author | Karel Zak | 2019-03-06 13:12:23 +0100 |
|---|---|---|
| committer | Karel Zak | 2019-03-06 13:12:23 +0100 |
| commit | 64a87be1a4a899ee43b0960a669046e127cf46fa (patch) | |
| tree | 72d488d5f9eeae675da35e2a5555a6ad4e7a8b7f /login-utils | |
| parent | su: be sensitive to another SIGCHLD ssi_codes (diff) | |
| download | kernel-qcow2-util-linux-64a87be1a4a899ee43b0960a669046e127cf46fa.tar.gz kernel-qcow2-util-linux-64a87be1a4a899ee43b0960a669046e127cf46fa.tar.xz kernel-qcow2-util-linux-64a87be1a4a899ee43b0960a669046e127cf46fa.zip | |
su: add note about ECHO on --pty
Signed-off-by: Karel Zak <kzak@redhat.com>
Diffstat (limited to 'login-utils')
| -rw-r--r-- | login-utils/runuser.1 | 4 | ||||
| -rw-r--r-- | login-utils/su.1 | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/login-utils/runuser.1 b/login-utils/runuser.1 index e6b9a8e6b..4eecd9c6a 100644 --- a/login-utils/runuser.1 +++ b/login-utils/runuser.1 @@ -109,6 +109,10 @@ security attacks against terminal file descriptors. The all session is also possible to move to background (e.g. "runuser --pty -u username -- command &"). If the pseudo-terminal is enabled then runuser command works as a proxy between the sessions (copy stdin and stdout). +.sp +This feature is mostly designed for interactive sessions. If the standard input +is not a terminal, but for example pipe (e.g. echo "date" | runuser --pty -u user) +than ECHO flag for the pseudo-terminal is disabled to avoid messy output. .TP .BR \-m , " \-p" , " \-\-preserve\-environment" Preserve the entire environment, i.e. it does not set diff --git a/login-utils/su.1 b/login-utils/su.1 index f2b8fac8a..c09cb1c13 100644 --- a/login-utils/su.1 +++ b/login-utils/su.1 @@ -115,6 +115,10 @@ security attacks against terminal file descriptors. The all session is also possible to move to background (e.g. "su --pty - username -c application &"). If the pseudo-terminal is enabled then su command works as a proxy between the sessions (copy stdin and stdout). +.sp +This feature is mostly designed for interactive sessions. If the standard input +is not a terminal, but for example pipe (e.g. echo "date" | su --pty) than ECHO +flag for the pseudo-terminal is disabled to avoid messy output. .TP .BR \-s , " \-\-shell" = \fIshell Run the specified \fIshell\fR instead of the default. The shell to run is |