You want to know which program invoked script.sh? A ps listing will reveal the parent PID. It's possible for the parent to exit before the child does, though; then your process will show as orphaned.
Code:
ps wallx | { head -1; grep 'script\.sh'; }
ps options vary wildly between systems; see your local manual page for what will work for you.
The head is just to get the explanatory header as well; in a script, you don't want that.
Example:
Code:
vbvntv$ ps wallx | { head -1; grep to*tem ; }
F UID PID PPID PRI NI VSZ RSS WCHAN STAT TTY TIME COMMAND
0 1000 9478 1 15 0 113136 30536 - SLl ? 32:30 totem
Here, the parent's PID (PPID) is 1, which is typical for an orphan (the system's init process adopts any orphans).
Hi,
I just tried to call a simple script from a pretty simple C program. I could not succeed :-( a message was thrown saying
"sh: line 1: "Script name with path": Permission denied"
The C program and shell script are below, both are in the same directory and shell script is given... (7 Replies)
Hi,
I have a K shell
a.ksh
function abc {
// Some logic
}
In
b.ksh
i have included the a.ksh
./a.ksh
I want to call the abc function from this b.ksh script.
Thanks
Vijay (2 Replies)
Hi all,
I need to call some script (s1) from within my shell script (s2). s1 accepts parameters and I want to feed it with values of params from my script. I tried many things but none work (I am so much of a beginner), please help
one of my attempts :
.
.
.
param1="hehe"
param2="haha"
... (12 Replies)
Can someone offer some technical advice concerning an call to a IBM U2 (Universe) program?
When I use the following script from a unix shell, it works fine:
$ " xxx.sh "
(contains the following --->)
1. cd /links/ACCOUNT1
2. /shapps/ibm/uv/bin/uv "COUNT FILE1" ... (2 Replies)
On bash I run precompiled c Program as follows:
./create_cust 1 10000 US S > us_cust.csv
create_cust is a c program and requires 4 parameters.
I am redirecting the output of this program to csv file
I need to run this same program in perl
I am aware of exec command though not... (7 Replies)
Hi,
I have a shell script which connects to a database and fetches the count of the records from a table. I want to embed this whole script in a C program. Also the count fetched should be available in the C program for further usage.
Please let me know how this can be done.
Thanks
... (0 Replies)
Hi,
I have a shell script which connects to a database and fetches the count of the records from a table. I want to embed this whole script in a C program. Also the count fetched should be available in the C program for further usage.
Please let me know how this can be done.
Thanks (9 Replies)
Hi All,
Probably this is a repeated question. My knowledge in this is limited and i got confused on all those materials i got in google search.
We use #include <> to include a predefined library like stdio.h
i saw somewhere that #include "" includes a man made module(another C program). IS... (2 Replies)
Long story short: I'm working inside of a Unix SSH under a bash shell. I have to code a C program that generates a random number. Then I have to call the compiled C program with a Perl program to run the C program 20 times and put all the generated random #s into a text file, then print that text... (1 Reply)
Hi,
I am a newbie to linux programming. I have implemented msgqueue in C.
msgrcv() call at the client end is as below:
msgrcv( msgqid, msgptr, msgsize, msgtype, 0 );
My program works fine when msgrcv () from /lib/libc.so.6 is called.
However it crashes when __libc_msgrcv() is called.
... (3 Replies)
Discussion started by: praasanna
3 Replies
LEARN ABOUT REDHAT
fork
FORK(2) Linux Programmer's Manual FORK(2)NAME
fork - create a child process
SYNOPSIS
#include <sys/types.h>
#include <unistd.h>
pid_t fork(void);
DESCRIPTION
fork creates a child process that differs from the parent process only in its PID and PPID, and in the fact that resource utilizations are
set to 0. File locks and pending signals are not inherited.
Under Linux, fork is implemented using copy-on-write pages, so the only penalty incurred by fork is the time and memory required to dupli-
cate the parent's page tables, and to create a unique task structure for the child.
RETURN VALUE
On success, the PID of the child process is returned in the parent's thread of execution, and a 0 is returned in the child's thread of exe-
cution. On failure, a -1 will be returned in the parent's context, no child process will be created, and errno will be set appropriately.
ERRORS
EAGAIN fork cannot allocate sufficient memory to copy the parent's page tables and allocate a task structure for the child.
ENOMEM fork failed to allocate the necessary kernel structures because memory is tight.
CONFORMING TO
The fork call conforms to SVr4, SVID, POSIX, X/OPEN, BSD 4.3.
SEE ALSO clone(2), execve(2), vfork(2), wait(2)Linux 1.2.9 1995-06-10 FORK(2)