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builtin "exec -l" does not function as published


From: eric__lee
Subject: builtin "exec -l" does not function as published
Date: Tue, 15 Apr 2003 22:33:25 +0100

Configuration Information [Automatically generated, do not change]:
Machine: i386
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i386' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i386-redhat-linux-gnu' 
-DCONF_VENDOR='redhat' -DSHELL -DHAVE_CONFIG_H  -D_GNU_SOURCE 
-D_FILE_OFFSET_BITS=64  -I.  -I. -I./include -I./lib -I/usr/include -O2 
-march=i386 -mcpu=i686
uname output: Linux t-heads 2.4.18 #29 Thu Oct 10 22:39:59 BST 2002 i686 unknown
Machine Type: i386-redhat-linux-gnu

Bash Version: 2.05
Patch Level: 8
Release Status: release

Description:
        The man page suggests that the "-l" option causes "exec" to behave
        like the "login" command and create a "-" (dash) prefix to argument
        zero. When creating arg[0], login strips dirname and prefixes the
        simple filename with a dash. Bash does not strip dirname, but simply
        prefixes the whole pathname with a dash.


Repeat-By:
        execute:

        bash -c 'exec -l /bin/ps -f $$'

        produces:
        UID        PID  PPID  C STIME TTY      STAT   TIME CMD
        eric     24473 24406  0 22:24 pts/6    R      0:00 -/bin/ps -f 24473

        Rather than expected:
        UID        PID  PPID  C STIME TTY      STAT   TIME CMD
        eric     24473 24406  0 22:24 pts/6    R      0:00 -ps -f 24473




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