[screen-devel] [bug #28448] screen infloops/hangs when running it with username "none"

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?28448>

                 Summary: screen infloops/hangs when running it with username
"none"
                 Project: GNU Screen
            Submitted by: None
            Submitted on: Do 31 Dez 2009 00:52:58 UTC
                Category: Crash/Freeze/Infloop
                Severity: 3 - Normal
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                 Release: None
           Fixed Release: None
         Planned Release: None
           Work Required: None

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Details:

screen will not execute succesfully when you use 'none' (without the quotes)
as username. This was reproducable on Debian 4.0, Debian 5.0, OpenBSD, centOS
and OSX snow leopard.

This behavior seems to be present in (all?) releases up to 4.0.3

Excerpt of a strace:

setgid32(1000)                          = 0
setuid32(1000)                          = 0
rt_sigaction(SIGHUP, {0x806be00, [], SA_RESTORER, 0xb7e539e8}, {0x806be00,
[], SA_RESTORER, 0xb7e539e8}, 8) = 0
rt_sigaction(SIGHUP, {0x806be00, [], SA_RESTORER, 0xb7e539e8}, {0x806be00,
[], SA_RESTORER, 0xb7e539e8}, 8) = 0
rt_sigaction(SIGUSR1, {0x806bd70, [], SA_RESTORER, 0xb7e539e8}, {SIG_DFL}, 8)
= 0
rt_sigaction(SIGUSR2, {0x806b940, [], SA_RESTORER, 0xb7e539e8}, {SIG_DFL}, 8)
= 0
rt_sigaction(SIGINT, {0x806bdc0, [], SA_RESTORER, 0xb7e539e8}, {SIG_DFL}, 8)
= 0
rt_sigaction(SIGTSTP, {0x806b930, [], SA_RESTORER, 0xb7e539e8}, {SIG_DFL}, 8)
= 0
rt_sigaction(SIGWINCH, {0x806b950, [], SA_RESTORER, 0xb7e539e8}, {SIG_DFL},
8) = 0
rt_sigaction(SIGALRM, {0x806b920, [], SA_RESTORER, 0xb7e539e8}, {SIG_DFL}, 8)
= 0
alarm(15)                               = 0
pause()                                 = ? ERESTARTNOHAND (To be restarted)
--- SIGALRM (Alarm clock) @ 0 (0) ---
sigreturn()                             = ? (mask now [])
alarm(0)                                = 0
kill(5636, SIG_0)                       = 0
rt_sigaction(SIGALRM, {0x806b920, [], SA_RESTORER, 0xb7e539e8}, {0x806b920,
[], SA_RESTORER, 0xb7e539e8}, 8) = 0
alarm(15)                               = 0
pause()                                 = ? ERESTARTNOHAND (To be restarted)
--- SIGALRM (Alarm clock) @ 0 (0) ---
sigreturn()                             = ? (mask now [])
alarm(0)                                = 0
kill(5636, SIG_0)                       = 0
rt_sigaction(SIGALRM, {0x806b920, [], SA_RESTORER, 0xb7e539e8}, {0x806b920,
[], SA_RESTORER, 0xb7e539e8}, 8) = 0
alarm(15)                               = 0
pause()                                 = ? ERESTARTNOHAND (To be restarted)

... and so on





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