personality: Add support for setting execution domain.

Execution domains tell Linux how to map signal numbers into signal actions.
The execution domain system allows Linux to provide limited support for binaries
compiled under other UNIX-like operating systems.

Reference: https://man7.org/linux/man-pages/man2/personality.2.html

Signed-off-by: flouthoc <flouthoc.git@gmail.com>

2 files changed, 22 insertions, 2 deletions

diff --git a/docs/source/markdown/podman-create.1.md b/docs/source/markdown/podman-create.1.md
index b2f7260ae..51f51c10a 100644
--- a/docs/source/markdown/podman-create.1.md
+++ b/docs/source/markdown/podman-create.1.md
@@ -706,6 +706,10 @@ Tune the host's OOM preferences for containers (accepts -1000 to 1000)
 #### **--os**=*OS*
 Override the OS, defaults to hosts, of the image to be pulled. For example, `windows`.
 
+#### **--personality**=*persona*
+
+Personality sets the execution domain via Linux personality(2).
+
 #### **--pid**=*pid*
 
 Set the PID mode for the container
@@ -1429,6 +1433,12 @@ $ podman start --attach container3
 $ podman create -v /var/lib/design:/var/lib/design --group-add keep-groups ubi8
 ```
 
+### Configure execution domain for containers using personality flag
+
+```
+$ podman create --name container1 --personaity=LINUX32 fedora bash
+```
+
 ### Rootless Containers
 
 Podman runs as a non root user on most systems. This feature requires that a new enough version of shadow-utils
@@ -1491,7 +1501,7 @@ NOTE: Use the environment variable `TMPDIR` to change the temporary storage loca
 
 ## SEE ALSO
 **podman**(1), **podman-secret**(1), **podman-save**(1), **podman-ps**(1), **podman-attach**(1), **podman-pod-create**(1), **podman-port**(1), **podman-start*(1), **podman-kill**(1), **podman-stop**(1),
-**podman-generate-systemd**(1) **podman-rm**(1), **subgid**(5), **subuid**(5), **containers.conf**(5), **systemd.unit**(5), **setsebool**(8), **slirp4netns**(1), **fuse-overlayfs**(1), **proc**(5), **conmon**(8).
+**podman-generate-systemd**(1) **podman-rm**(1), **subgid**(5), **subuid**(5), **containers.conf**(5), **systemd.unit**(5), **setsebool**(8), **slirp4netns**(1), **fuse-overlayfs**(1), **proc**(5), **conmon**(8), **personality**(2).
 
 ## HISTORY
 October 2017, converted from Docker documentation to Podman by Dan Walsh for Podman `<dwalsh@redhat.com>`
diff --git a/docs/source/markdown/podman-run.1.md b/docs/source/markdown/podman-run.1.md
index f08561904..38ed44582 100644
--- a/docs/source/markdown/podman-run.1.md
+++ b/docs/source/markdown/podman-run.1.md
@@ -726,6 +726,10 @@ Tune the host's OOM preferences for containers (accepts values from **-1000** to
 #### **--os**=*OS*
 Override the OS, defaults to hosts, of the image to be pulled. For example, `windows`.
 
+#### **--personality**=*persona*
+
+Personality sets the execution domain via Linux personality(2).
+
 #### **--pid**=*mode*
 
 Set the PID namespace mode for the container.
@@ -1776,6 +1780,12 @@ $ podman run --name container3 --requires container1,container2 -t -i fedora bas
 $ podman run -v /var/lib/design:/var/lib/design --group-add keep-groups ubi8
 ```
 
+### Configure execution domain for containers using personality flag
+
+```
+$ podman run --name container1 --personaity=LINUX32 fedora bash
+```
+
 ### Rootless Containers
 
 Podman runs as a non root user on most systems. This feature requires that a new enough version of **shadow-utils**
@@ -1836,7 +1846,7 @@ NOTE: Use the environment variable `TMPDIR` to change the temporary storage loca
 
 ## SEE ALSO
 **podman**(1), **podman-save**(1), **podman-ps**(1), **podman-attach**(1), **podman-pod-create**(1), **podman-port**(1), **podman-start**(1), **podman-kill**(1), **podman-stop**(1),
-**podman-generate-systemd**(1) **podman-rm**(1), **subgid**(5), **subuid**(5), **containers.conf**(5), **systemd.unit**(5), **setsebool**(8), **slirp4netns**(1), **fuse-overlayfs**(1), **proc**(5), **conmon**(8).
+**podman-generate-systemd**(1) **podman-rm**(1), **subgid**(5), **subuid**(5), **containers.conf**(5), **systemd.unit**(5), **setsebool**(8), **slirp4netns**(1), **fuse-overlayfs**(1), **proc**(5), **conmon**(8), **personality**(2).
 
 ## HISTORY
 September 2018, updated by Kunal Kushwaha `<kushwaha_kunal_v7@lab.ntt.co.jp>`