Standardize apps use of -rand, etc.

Standardized the -rand flag and added a new one:
    -rand file...
            Always reads the specified files
    -writerand file
            Always writes to the file on exit

For apps that use a config file, the RANDFILE config parameter reads
the file at startup (to seed the RNG) and write to it on exit if
the -writerand flag isn't used.

Ensured that every app that took -rand also took -writerand, and
made sure all of that agreed with all the documentation.

Fix error reporting in write_file and -rand

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/3862)

1 files changed, 15 insertions, 0 deletions

diff --git a/doc/man1/passwd.pod b/doc/man1/passwd.pod
index 02f6339883..3c16946078 100644
--- a/doc/man1/passwd.pod
+++ b/doc/man1/passwd.pod
@@ -20,6 +20,8 @@ B<openssl passwd>
 [B<-noverify>]
 [B<-quiet>]
 [B<-table>]
+[B<-rand file...>]
+[B<-writerand file>]
 {I<password>}
 
 =head1 DESCRIPTION
@@ -88,6 +90,19 @@ Don't output warnings when passwords given at the command line are truncated.
 In the output list, prepend the cleartext password and a TAB character
 to each password hash.
 
+=item B<-rand file...>
+
+A file or files containing random data used to seed the random number
+generator.
+Multiple files can be specified separated by an OS-dependent character.
+The separator is B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for
+all others.
+
+=item [B<-writerand file>]
+
+Writes random data to the specified I<file> upon exit.
+This can be used with a subsequent B<-rand> flag.
+
 =back
 
 =head1 EXAMPLES