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    Subject2.1.85+Alan-2: strangeness with rm and sudo
    As root, I had done "cat /dev/vcs3>/tmp/vcs3" to save the text from a
    virtual console into a file. Later, when I tried to clean up /tmp as
    myself using sudo, I was unable to remove the file, even though it
    appeared to have the same permissions as others which I could remove. I
    logged in as root and could then delete it.

    ~> cd /tmp
    /tmp> ls -ls|sort
    4 -rw-r--r-- 1 root root 3200 Feb 5 14:57 vcs3
    4 -rw-r--r-- 1 root root 4072 Jan 22 20:56 awe_config.853
    4 -rw-r--r-- 1 root root 4072 Jan 22 20:56 awe_config.878
    4 -rw-r--r-- 1 root root 4072 Jan 25 20:26 awe_config.524
    4 -rw-r--r-- 1 root root 4072 Jan 25 20:26 awe_config.546
    4 -rw-r--r-- 1 root root 4072 Jan 25 20:27 awe_config.562
    65 -rw------- 1 root root 65536 Jan 31 19:07 elvis1.ses
    97 -rw------- 1 root root 98304 Jan 31 20:01 elvis3.ses
    145 -rw------- 1 root root 147456 Jan 31 19:48 elvis2.ses
    /tmp> sudo rm elvis*ses
    Password:
    /tmp> sudo rm awe_config.*
    /tmp> rm vcs3
    rm: remove `vcs3', overriding mode 0644? y
    rm: vcs3: Operation not permitted
    /tmp> ls -l vcs3
    -rw-r--r-- 1 root root 3200 Feb 5 14:57 vcs3

    ~# cd /tmp
    /tmp# rm vcs3
    /tmp#

    /tmp% what `which sudo`
    /usr/bin/sudo
    The Linux C library 5.3.5
    encrypt.c 3.4 19:44:23 12/10/90
    getpass.c 3.7 08:27:22 10/31/91
    rad64.c 3.3 20:38:01 3/7/92
    shadow.c 3.10 20:38:10 3/7/92
    patchlevel.h 1.6 01/31/92
    /tmp% ldd /usr/bin/sudo
    statically linked (ELF)

    My rm is from the GNU fileutils, version 3.16, and is dynamically linked
    to libc 2.0.5.
    ___
    Trevor Johnson

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