Sponsored Content
Top Forums Programming Signal out from fork()'d shell script back to the C++ application Post 302888135 by mirni on Wednesday 12th of February 2014 07:14:17 PM
Old 02-12-2014
Signal out from fork()'d shell script back to the C++ application

Hi,
I am writing a C++ application; in which at one point I fork() a new process, which executes a shell script (via execv() call).
Now the shell script can take a while to finish (tarring, burning a cd, etc.) and I would like to update the parent application about the progress (while the script is running).
Any ideas on how to do this?
Thank you!
Miro
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

shell script signal handler

AIX 4.3.3 I am trying to write a signal handler into a ksh shell script. I would like to capture the SIGTERM, SIGINT, and the SIGTSTP signals, print out a message to the terminal, and continue executing the script. I have found a way to block the signals: #! /bin/ksh SIGTERM=15 SIGINT=2... (2 Replies)
Discussion started by: jalburger
2 Replies

2. UNIX for Advanced & Expert Users

signal handling in shell script

Hi can any please tell me is it possible to catch the signal in a shell script like we do in C. if yes please give me some idea or a link. (4 Replies)
Discussion started by: Raom
4 Replies

3. Shell Programming and Scripting

how to write shell script to take back up

Helo, I want to write shell script which takes back of all binaries (exe files). and when i uninstall the upgraded system which automatically restore the old binary which we have take as back up. can u tell me how to write such shell scripts. Regards, Amit (5 Replies)
Discussion started by: amitpansuria
5 Replies

4. Shell Programming and Scripting

Run shell script from C program by calling fork and execl

I need to write a c program that uses the fork and excel system calls to run the shell script mode invoked like this: "./mode 644 ls -l" (that is the argumetns will always be 644 ls -l) here's the mode script: #!/bin/sh octal="$1" shift find . -maxdepth 1 -perm $octal -exec $@ {} \; ... (3 Replies)
Discussion started by: computethis
3 Replies

5. Shell Programming and Scripting

How to ADD signal stop commands in Shell Script

Hi , I do have a shell which test the connectivity using ssh, soon after the login it should use the keys Ctrl + z or Ctrl + c to exit from login promt. So how do i need to implement these . (3 Replies)
Discussion started by: raghunsi
3 Replies

6. Shell Programming and Scripting

How trap a signal in shell script?

Hi , i have a scenario where...i have to put a check where if script is executing more than 15mins i have to kill that script and n retry again 2nd time. i this case i can use background process to do it but i feel trap will be the efficent way to do so... but i dont know much about it... (1 Reply)
Discussion started by: crackthehit007
1 Replies

7. Shell Programming and Scripting

how to suppress the status of fork in shell script

When command is executed by forking, the console displays the status of that command. I want to suppress it.. how to do it ? Example: var1=`date` & echo "hello world"; output: hello world + Done var1=`date` I want to suppress the second line "+ Done var1=`date`". I... (10 Replies)
Discussion started by: Arun_Linux
10 Replies

8. Shell Programming and Scripting

Help: how to call fork() in shell script? New to linux

Hi, I'm writing a shell script where I want to call fork(). However I wrote like this "var=fork()" in c style and got this error: "syntax error near unexpected token `(' " How could I call fork() in shell script? Thanks in advance. Duplicate Post - Continue Here - Please Do Not Cross Post... (0 Replies)
Discussion started by: Xiaoya
0 Replies

9. Ubuntu

Help: how to call fork() in shell script? New to linux

Hi, I'm writing a shell script where I want to call fork(). However I wrote like this "var=fork()" in c style and got this error: "syntax error near unexpected token `(' " How could I call fork() in shell script? Thanks in advance. (2 Replies)
Discussion started by: Xiaoya
2 Replies

10. Shell Programming and Scripting

Passing control back to the shell script

Hi All, I have a shell script(test_abc.sh) with the following shell commands, which are invoking the same shell script with different parameters. test_abc.sh . ./test.sh abc >> test.log . ./test.sh xyz >> test.log . ./test.sh pys >> test.log . ./test.sh abc >> test.log . . ... (4 Replies)
Discussion started by: dev.devil.1983
4 Replies
SCRIPT(1)						    BSD General Commands Manual 						 SCRIPT(1)

NAME
script -- make typescript of terminal session SYNOPSIS
script [-akq] [-t time] [file [command ...]] DESCRIPTION
The script utility makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1). If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript. If the argument command is given, script will run the specified command with an optional argument vector instead of an interactive shell. The following options are available: -a Append the output to file or typescript, retaining the prior contents. -k Log keys sent to program as well as output. -q Run in quiet mode, omit the start and stop status messages. -t time Specify time interval between flushing script output file. A value of 0 causes script to flush for every character I/O event. The default interval is 30 seconds. The script ends when the forked shell (or command) exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-D (if ignoreeof is not set) for the C-shell, csh(1)). Certain interactive commands, such as vi(1), create garbage in the typescript file. The script utility works best with commands that do not manipulate the screen. The results are meant to emulate a hardcopy terminal, not an addressable one. ENVIRONMENT
The following environment variable is utilized by script: SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most shells set this variable automatically). SEE ALSO
csh(1) (for the history mechanism). HISTORY
The script command appeared in 3.0BSD. BUGS
The script utility places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects. It is not possible to specify a command without also naming the script file because of argument parsing compatibility issues. When running in -k mode, echo cancelling is far from ideal. The slave terminal mode is checked for ECHO mode to check when to avoid manual echo logging. This does not work when in a raw mode where the program being run is doing manual echo. BSD
January 22, 2004 BSD
All times are GMT -4. The time now is 05:19 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy