Thanks rovf,
That would mostly work I think but beside the language barrier, I don't like relying on error messages that could vary from one implementation to another. But that's the best answer so far.
Thanks MadeInGermany,
My problem is that on some systems, there are some processes that I just don't see as a normal user (not only no permission, really don't see) so I cannot rely on ps. Take the following example:
It looks like process 1 does not exists but kill and sudo prove otherwise:
I wasn't sure if I should post it here of in the Shell Script category, but I figured it was definitely a newbie question.
I'm trying to write a script that will check for the existence of a specific file (or for any files within the directory) and then take specific actions. I've removed all... (2 Replies)
Hey all,
I have total new with shell scripting so I don't know if what I need to do even possible, here it is...for a duration of time (say...1 hour) I need to check for the existence of a particular file, if it exists then I will invoke a java program or I will continue to check until a)... (2 Replies)
Hello,
I have this process app.fcgi and a directory containing images. I'd like to ensure that only app.cgi can access those images and more generally that folder.Thanks! (1 Reply)
Hi
I want to check a particular file is available or not. But i know only the pattern of that file sat AB1234*.txt.I need the latest file name and it ll be used in the script. How can i do this using ls -ltr command.
Thanks,
LathishSundar V (2 Replies)
Hi,
I want to make a bash script which is running like :
1.sh http://www. google.com
and check if the url does exist printing a message.
I want to save the source code of this page in a file.
Could you help me ? (4 Replies)
Hi
I'm using the below command in shell script to check for file exists in the path
if
.....
fi
path and test are variables
path and the file exists but the commands inside if condition is executed (! operator used)
Is the above way of checking for file existence is correct?
... (4 Replies)
Hope someone can help me on this
In a directory ,files are dynamically generated.I need a script to do the following
if files are not received for more than 2 hours or if the received file is empty
then do something
How can I put that in a script.Thank you
eg. in cd /dir_name the... (13 Replies)
I'm on AIX. I have triggered an infinite loop process (to keep looking for input file availability for further process). At present only I can kill the process.
In case my colleague wants to kill the process for any reason, how do I provide permission to others to kill the process?
Currently... (3 Replies)
Discussion started by: krishmaths
3 Replies
LEARN ABOUT MOJAVE
kill
KILL(2) BSD System Calls Manual KILL(2)NAME
kill -- send signal to a process
SYNOPSIS
#include <signal.h>
int
kill(pid_t pid, int sig);
DESCRIPTION
The kill() function sends the signal specified by sig to pid, a process or a group of processes. Typically, Sig will be one of the signals
specified in sigaction(2). A value of 0, however, will cause error checking to be performed (with no signal being sent). This can be used
to check the validity of pid.
For a process to have permission to send a signal to a process designated by pid, the real or effective user ID of the receiving process must
match that of the sending process or the user must have appropriate privileges (such as given by a set-user-ID program or the user is the
super-user). A single exception is the signal SIGCONT, which may always be sent to any descendant of the current process.
If pid is greater than zero:
Sig is sent to the process whose ID is equal to pid.
If pid is zero:
Sig is sent to all processes whose group ID is equal to the process group ID of the sender, and for which the process has permission;
this is a variant of killpg(2).
If pid is -1:
If the user has super-user privileges, the signal is sent to all processes excluding system processes and the process sending the
signal. If the user is not the super user, the signal is sent to all processes with the same uid as the user, excluding the process
sending the signal. No error is returned if any process could be signaled.
For compatibility with System V, if the process number is negative but not -1, the signal is sent to all processes whose process group ID is
equal to the absolute value of the process number. This is a variant of killpg(2).
RETURN VALUES
Upon successful completion, a value of 0 is returned. Otherwise, a value of -1 is returned and errno is set to indicate the error.
ERRORS
kill() will fail and no signal will be sent if:
[EINVAL] Sig is not a valid, supported signal number.
[EPERM] The sending process is not the super-user and its effective user id does not match the effective user-id of the receiving
process. When signaling a process group, this error is returned if any members of the group could not be signaled.
[ESRCH] No process or process group can be found corresponding to that specified by pid.
[ESRCH] The process id was given as 0, but the sending process does not have a process group.
SEE ALSO getpgrp(2), getpid(2), killpg(2), sigaction(2)STANDARDS
The kill() function is expected to conform to IEEE Std 1003.1-1988 (``POSIX.1'').
4th Berkeley Distribution April 19, 1994 4th Berkeley Distribution