10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have the following bash script lines in a file named test.sh.
#!/bin/bash
#
# Write Date to cron.log
#
echo "Begin SSI Load $(date +%d%b%y_%T)"
#
# Get the latest rates file for processing.
#
d=$(ls -tr /rms/data/ssi | grep -v "processed" | tail -n 1)
filename=$d
export filename... (3 Replies)
Discussion started by: ginowms
3 Replies
2. UNIX for Advanced & Expert Users
Hi,
I need to delete the last N days file using find.
I am trying to use
find . -mtime -10 -print
which lists down required files.
but when i use
find . -mtime -10 -exec ls -lrt {} \;
it gives me all files in the directory including the required files but the required files... (7 Replies)
Discussion started by: v_m1986
7 Replies
3. UNIX for Dummies Questions & Answers
Hi,
i don't understand this part of one script
exec >> $Log_File 2>&1 (1 Reply)
Discussion started by: messi777
1 Replies
4. UNIX for Advanced & Expert Users
Hi,
on AIX 6.L
I want to copy the result of grep -v to test directory then :
`hostname`@oracle$ls -l | grep -v RINT -exec cp {} test
grep: can't open -exec
grep: can't open cp
grep: can't open {}
test:°`.
Can you help me ?
Thank you. (3 Replies)
Discussion started by: big123456
3 Replies
5. Shell Programming and Scripting
Hi folks
I am working on a script which lists files of a specific pattern on a remote m/c and tar&zip them to another remote m/c via a centralized server.
M/C details:
remote1 - OSF1 vayu V5.1 2650 alpha
remote2 - cygwin based windows server
central - SunOS phys-chenab 5.8... (2 Replies)
Discussion started by: royalbull
2 Replies
6. Shell Programming and Scripting
I have an expect script that interrogates several hundred unix servers for both access and directories therein using "ssh user@host ls -l /path". The combination of host/path are unique but the host may be interrogated multiple times if there are multiple paths to test.
The expect script is run... (2 Replies)
Discussion started by: twk
2 Replies
7. Shell Programming and Scripting
Hi all,
I had an issue regarding use of `` or exec in perl . `` are considered to be unsafe. Why? In my case an user would be giving some parameters as input and I will form an command of it and execute it using ``. It is important to capture output as i have to parse the output. As well as I need... (0 Replies)
Discussion started by: bharadiaam
0 Replies
8. UNIX for Advanced & Expert Users
I have read that exec "replaces the current process with a new one".
So I did
$ exec ls
and after this executed, my shell disappeared. I am assuming that my shell had PID xyz, and when I did exec ls, this ls got pid xyz, and when it terminated, there was no more shell process running, and... (5 Replies)
Discussion started by: JamesByars
5 Replies
9. AIX
Dears
we have an application that try to excute commands via using a (rexec.dll) to connect to an AIX box and running commnds but when we try to do that then the connection will be rejected by the AIX box, are there any pre-configurations or settings that must be done in order to gain the... (1 Reply)
Discussion started by: TheEngineer
1 Replies
10. Shell Programming and Scripting
In exec function say when i would like to remove the files
exec rm{}\;
Why is this "\" needed immediately after {} and what if i dont give it?
TIA,
Nisha (1 Reply)
Discussion started by: Nisha
1 Replies
exec(1) User Commands exec(1)
NAME
exec, eval, source - shell built-in functions to execute other commands
SYNOPSIS
sh
exec [argument...]
eval [argument...]
csh
exec command
eval argument...
source [-h] name
ksh
*exec [arg...]
*eval [arg...]
DESCRIPTION
sh
The exec command specified by the arguments is executed in place of this shell without creating a new process. Input/output arguments may
appear and, if no other arguments are given, cause the shell input/output to be modified.
The arguments to the eval built-in are read as input to the shell and the resulting command(s) executed.
csh
exec executes command in place of the current shell, which terminates.
eval reads its arguments as input to the shell and executes the resulting command(s). This is usually used to execute commands generated as
the result of command or variable substitution.
source reads commands from name. source commands may be nested, but if they are nested too deeply the shell may run out of file descrip-
tors. An error in a sourced file at any level terminates all nested source commands.
-h Place commands from the file name on the history list without executing them.
ksh
With the exec built-in, if arg is given, the command specified by the arguments is executed in place of this shell without creating a new
process. Input/output arguments may appear and affect the current process. If no arguments are given the effect of this command is to mod-
ify file descriptors as prescribed by the input/output redirection list. In this case, any file descriptor numbers greater than 2 that are
opened with this mechanism are closed when invoking another program.
The arguments to eval are read as input to the shell and the resulting command(s) executed.
On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not
performed.
EXIT STATUS
For ksh:
If command is not found, the exit status is 127. If command is found, but is not an executable utility, the exit status is 126. If a redi-
rection error occurs, the shell exits with a value in the range 1-125. Otherwise, exec returns a zero exit status.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
csh(1), ksh(1), sh(1), attributes(5)
SunOS 5.10 17 Jul 2002 exec(1)