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Top Forums Programming Core File Not Being Generated in AIX Post 40511 by S.P.Prasad on Wednesday 17th of September 2003 05:52:51 AM
Old 09-17-2003
Core File Not Being Generated in AIX

I have created an executable using my login session in an AIX Version 5 Unix system. After to which I have change the file mode to set uid and rwsrwx--x and ownership to root:system by using the following Standard C Library functions.

chmod (name, S_ISUID|S_IRWXU|S_IRWXG|S_IXOTH|S_IROTH)
chown (name, 0, 1)

where name is the name of the executable whose permissions needs to be changed. When I execute my executable using my login session, the executable gives a segmentation fault but the core file is not being generated. When I saw the man page of core in the system it said that "A process with a saved user ID that differs from the real user ID does not produce a memory image. The same holds true for the group ID (GID) and effective
group ID" .

Is it possible that we can generate a core file through some technique which would aid me in tracing the cause of the segmentation fault.
 

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CHSH(1) 							   User Commands							   CHSH(1)

NAME
chsh - change your login shell SYNOPSIS
chsh [-s shell] [-l] [-u] [-v] [username] DESCRIPTION
chsh is used to change your login shell. If a shell is not given on the command line, chsh prompts for one. chsh is used to change local entries only. Use ypchsh, lchsh or any other implementation for non-local entries. OPTIONS
-s, --shell shell Specify your login shell. -l, --list-shells Print the list of shells listed in /etc/shells and exit. -u, --help Print a usage message and exit. -v, --version Print version information and exit. VALID SHELLS
chsh will accept the full pathname of any executable file on the system. However, it will issue a warning if the shell is not listed in the /etc/shells file. On the other hand, it can also be configured such that it will only accept shells listed in this file, unless you are root. EXIT STATUS
Returns 0 if operation was successful, 1 if operation failed or command syntax was not valid. SEE ALSO
login(1), passwd(5), shells(5) AUTHOR
Salvatore Valente <svalente@mit.edu> AVAILABILITY
The chsh command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/. util-linux July 2009 CHSH(1)
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