I am programming the following simple shell program. It works for the most part, things like 'ls' and 'ps' work just fine. However when I add options, (example, ls -l) it does not execute the command. Also, I've been trying to add an "exit" command, so that I don't have to use the iterrupt; but every time I try..' if (buf == "exit") exit(0) ' in the child it doesn't seem to read the array for some reason. Any suggestions?
Thanks
Last edited by Perderabo; 03-11-2005 at 09:11 PM..
Reason: Add code tags for readability
Now, am in a very tight situation here. I really dont expect anyone to understand but please, try your best.
am trying to right a program that goes back to the previous entry to correct a mistake.
heres what am trying to do. i write a program like this
Name : James Holgston... (1 Reply)
Hellow every body
I am trying to write a very simple script in an executable file as following
if ($?PWD) then
echo "OK"
else
echo "No"
endif
but I am getting error during execution in c shell as
synthax error at line 4 , unexpected end of file
Please advise (2 Replies)
How to write a shell script which takes 3 strings as positional parameters,first and second are file names and third is a directory.if the two files exist in `pwd` and they contain a specific pattern and their size is greater than 32 bytes,moves these files into directory? (1 Reply)
in the beginners book i have it gives an exercise to try. saying to make a script that examines the time. it should keep examining every second or so and say some sort of message. Can anyone help me get going.
Thanks (3 Replies)
I want to print the value of variables a1, a2, a3 in for loop in the following program:
a1=this
a2=is
a3=printed
for((i=1;i<4;i++))
do
var=a$i
#w=`echo $var`
e=${var}
echo $e
done
But actually I get a1,a2,a3 as the output not the "this is printed"
So the main question is if I... (3 Replies)
Iam having file 1 as
wc -l file1 is 8
QWEERTYUU|7927836357398398398913 yuyuyu uyiuyuyuyuy yuiyuiyuyuyy
FDHGFSHAJK|1476887897877777777771 iopwiiwpoi e
.
.
.
.
I Need to read the abouve line in file1
so iam using the command as
tail -n 8... (8 Replies)
Hi all,
I am trying to get a file from an ftp server and i have the list of files which needs to be get from the ftp server.
grep unix_prg*.* log.txt > log1.txt
log1.txt (which has the list of files)
06-29-09 00:00AM 3550258 unix_prg090629
06-28-09 07:00PM ... (7 Replies)
Hi all,
I have an assignment from school to write a shell program in linux. the idea is to exercise fork() and execv() functions.. the shell program is supposed to be the master and every command that the user prints will run in a new process. we also need to try running the command in every... (1 Reply)
1. I've have to write a shell program that accepts Ctrl+T (in linux os in c language) and should print out the current time and date to the screen. I've written the following code but i've to type ^T individual rather than pressing ctrl+T(^T) to get the output. :
2. How do i make the shell... (2 Replies)
Discussion started by: zorro_phu
2 Replies
LEARN ABOUT HPUX
sh
sh(1) General Commands Manual sh(1)NAME
sh - overview of various system shells
SYNOPSIS
POSIX Shell
option] ... string] [arg ...]
option] ... string] [arg ...]
Korn Shell
option] ... string] [arg ...]
option] ... string] [arg ...]
C Shell
[command_file] [argument_list ...]
Key Shell
DESCRIPTION
Remarks
The POSIX .2 standard requires that, on a POSIX-compliant system, executing the command activates the POSIX shell (located in file on HP-UX
systems), and executing the command produces an on-line manual entry that displays the syntax of the POSIX shell command-line.
However, the command has historically been associated with the conventional Bourne shell, which could confuse some users. To meet stan-
dards requirements and also clarify the relationships of the various shells and where they reside on the system, this entry provides com-
mand-line syntax and a brief description of each shell, and lists the names of the manual entries where each shell is described in greater
detail.
The Bourne shell is removed from the system starting with HP-UX 11i Version 1.5. Please use the POSIX shell as an alternative.
Shell Descriptions
The HP-UX operating system supports the following shells:
POSIX-conforming command programming language and command interpreter
residing in file Can execute commands read from a terminal or a file. This shell conforms to current POSIX standards in
effect at the time the HP-UX system release was introduced, and is similar to the Korn shell in many respects. Similar in
many respects to the Korn shell, the POSIX shell contains a history mechanism, supports job control, and provides various
other useful features.
Korn-shell command programming language and commands interpreter
residing in file Can execute commands read from a terminal or a file. This shell, like the POSIX shell, contains a his-
tory mechanism, supports job control, and provides various other useful features.
A command language interpreter
that incorporates a command history buffer, C-language-like syntax, and job control facilities.
Restricted version of the POSIX shell command interpreter.
Sets up a login name and execution environment whose capabilities are more controlled (restricted) than normal user
shells.
restricted version of the Korn-shell command interpreter
Sets up a login name and execution environment whose capabilities are more controlled (restricted) than normal user
shells.
An extension of the standard Korn Shell
that uses hierarchical softkey menus and context-sensitive help.
+--------------+--------------------+
| To obtain: | Use the command: |
+--------------+--------------------+
| POSIX Shell | /usr/bin/sh ... |
| Korn Shell | /usr/bin/ksh ... |
| C Shell | /usr/bin/csh ... |
| Key Shell | /usr/bin/keysh |
+--------------+--------------------+
These shells can also be the default invocation, depending on the entry in the file. See also chsh(1).
WARNINGS
Many manual entries contain descriptions of shell behavior or describe program or application behavior similar to ``the shell'' with a ref-
erence to ``see sh(1)''.
SEE ALSO
For more information on the various individual shells, see:
keysh(1) Key Shell description.
ksh(1) Korn Shell description.
sh-posix(1) POSIX Shell description.
csh(1) C Shell description.
sh(1)