08-18-2005
Check your path variable by using echo $PATH . In this see if there is any instance of '.' (dot). If there is (and I think that there will be), then that is the source of your problem.
When the shell executes any command it looks for the full path of the command from the variable $PATH. Then the command is executed using the fork and exec mechanism.
Now I will use the example provided by you to explain:
Assume that you are in the directory /maldini/sh. The value of the '.' in the path is also /maldini/sh (pwd). Now when you run run_program, it runs with pwd as /maldini/sh. When the call to functiona is reached, the shell looks for the script in all the directories in the $PATH variable. Since functiona is also in /maldini/sh directory, the shell finds the full path of the script and can execute it. However if you run the command from /maldini, as sh/run_program, then when the call to functiona is reached, the shell again looks for the script in the $PATH. However, the '.' now refers to /maldini (as it is the pwd). So the shell cannot find the path to the functiona script and fails.
The solution to the problem is to use the full path of any of your own shell scripts that you may call in a script.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I have created a file generic.func and it has lots of functions. One of the functions is this:
Check_backup_size()
{
dsmc q b $BACKUP_DIR/"*.Z" | awk '{print $1}'|sed 's///g' > outputfile
X=`awk '{sum += $1} END {print sum }' outputfile'`
echo "$X"
ls -ltr $BACKUP_DIR/"*.Z" | awk... (5 Replies)
Discussion started by: ashika
5 Replies
2. UNIX for Dummies Questions & Answers
This may sounds dumb, but can I call on a function from a file? For example, I have a function file full of functions like below (no shell designation):
func { echo "blah blah blah 1" }
func2 { echo "blah blah blah 2" }
func3 { echo "blah blah blah 3" }
Am I able to call on any one... (3 Replies)
Discussion started by: douknownam
3 Replies
3. Shell Programming and Scripting
I have two scripts. script1.sh looks
--------------------------------
#!/bin/bash
display()
{
echo "Welcome to Unix"
}
display
-----------------------------
Script2.sh
#!/bin/bash
sh script1.sh //simply calling script1.sh
------------------------------ (1 Reply)
Discussion started by: mvictorvijayan
1 Replies
4. Shell Programming and Scripting
This is my function which is creating three variables based on counter & writing these variable to database by calling another function writeRecord
but only one record is getting wrote in DB.... Please advise ASAP...:confused:
function InsertFtg
{
FTGSTR=""
echo "Saurabh is GREAT $#"
let... (2 Replies)
Discussion started by: omkar.sonawane
2 Replies
5. Shell Programming and Scripting
Hi,
I have a shell script 'sample.sh' which has some functions as below.
#fun1
fun1()
{
date
}
#fun2()
{
echo hi
}
I want to run these functions as background processes and also redirect the output to a file. My function calling statements are in a different file 'sample.cfg' as... (3 Replies)
Discussion started by: rama_kodam
3 Replies
6. Shell Programming and Scripting
Hi I need to call a function written in a cpp file with arguments inside the shell script..Can anyone help me how to do this:( (1 Reply)
Discussion started by: rkrish
1 Replies
7. Shell Programming and Scripting
Hi,
I need to run start_load function for two tables.
Step 1: if HMAX_TBL_ID and GMAX_TBLI_D are same for tab_name1 then echo message "all table ids are processed"
Step 2: go back and call start_load for tab_name2 and check if table id are same for table 2 too.
Please let me know how to... (5 Replies)
Discussion started by: sandy162
5 Replies
8. Shell Programming and Scripting
I have a function which does awk proceessing
sub mergeDescription {
system (q@awk -F'~' '
NR == FNR {
A = $1
B = $2
C = $0
next
}
{
n = split ( C, V, "~" )
if... (3 Replies)
Discussion started by: crypto87
3 Replies
9. Shell Programming and Scripting
In my prog if i enter the input for the 1st time it is executing correctly,
but for the second time entire script is not executing it just exiting
my code is
#!/bin/sh
checkpo()
{
echo "Checking the entered PO to create output text file ";
IFS=$'\n'
set -f
var=0
for i in $(cat... (3 Replies)
Discussion started by: Padmanabhan
3 Replies
10. Shell Programming and Scripting
I have a script which does gunzip, zip and untar.
Input to the script is file name and file directory (where file is located)
I am reading the input parameters as follows:
FILENAME=$1
FILEDIR=$2
I have created 3 functions that are as follows:
1) gunzip file
2) unzip file... (2 Replies)
Discussion started by: pinnacle
2 Replies
PIDOF(8) Linux System Administrator's Manual PIDOF(8)
NAME
pidof -- find the process ID of a running program.
SYNOPSIS
pidof [-s] [-c] [-n] [-x] [-o omitpid[,omitpid..]] [-o omitpid[,omitpid..]..] program [program..]
DESCRIPTION
Pidof finds the process id's (pids) of the named programs. It prints those id's on the standard output. This program is on some systems
used in run-level change scripts, especially when the system has a System-V like rc structure. In that case these scripts are located in
/etc/rc?.d, where ? is the runlevel. If the system has a start-stop-daemon (8) program that should be used instead.
OPTIONS
-s Single shot - this instructs the program to only return one pid.
-c Only return process ids that are running with the same root directory. This option is ignored for non-root users, as they will be
unable to check the current root directory of processes they do not own.
-n Avoid stat(2) system function call on all binaries which are located on network based file systems like NFS. Instead of using this
option the the variable PIDOF_NETFS may be set and exported.
-x Scripts too - this causes the program to also return process id's of shells running the named scripts.
-o omitpid
Tells pidof to omit processes with that process id. The special pid %PPID can be used to name the parent process of the pidof pro-
gram, in other words the calling shell or shell script.
EXIT STATUS
0 At least one program was found with the requested name.
1 No program was found with the requested name.
NOTES
pidof is actually the same program as killall5; the program behaves according to the name under which it is called.
When pidof is invoked with a full pathname to the program it should find the pid of, it is reasonably safe. Otherwise it is possible that
it returns pids of running programs that happen to have the same name as the program you're after but are actually other programs. Note
that that the executable name of running processes is calculated with readlink(2), so symbolic links to executables will also match.
SEE ALSO
shutdown(8), init(8), halt(8), reboot(8), killall5(8)
AUTHOR
Miquel van Smoorenburg, miquels@cistron.nl
01 Sep 1998 PIDOF(8)