./example1
bash: ./example1: No such file or directory
Though I did add the error that showed when I tried to run the first.c file:
Code:
./first.c: line 6: syntax error near unexpected token `!=0'
./first.c: line 6: `if( fork()!=0 )'
I didn't get what wrong in this line
Sorry, I missed that. I was thinking that you got it from running example1. What it wrong is that you can't execute source code. You have to compile it first and run the executable code that is produced from that source. But, as I implied with all of the questions about what errors you got when you tried to compile first.c (which you still haven't answered), I'm not at all surprised that you didn't get an executable file named example1. Fix all of the errors in your source code (missing #include lines for the headers that contain the prototypes for the functions you're using, misspelled function names, incorrect types on function arguments, and strongly consider checking return codes on functions like wait, execlp, and fork.
Note that fork returns 0 in the child after a successful fork, -1 after a failed fork, and the PID of the child to the parent after a successful fork. Just checking for non-zero doesn't give you enough information to understand what is going on in your code.
Hi,
I want to ask if anyone has any ideas, why the batch file i created to transfer files on my desktop doesn't run after i put this line in /etc/passwd and any idea to overcome it ? Thanks
user:!:xxx:xxx::/home/user:/usr/local/bin/ssh-dummy-shell (2 Replies)
Dear All
I have file a.sql, let's say the content is:
_________________________________
select * from dual;
exit;
_________________________________
and I have shell script a.sh, the content is:
_________________________________
ORACLE_SID=testing; export ORACLE_SID... (0 Replies)
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After login to the server we are explicitly calling /usr/local/bin/bash to activate bash shell properly.
But since commands are not executing properly so I think it is not initialized well. I am facing following problems:
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(
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hai
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You might help a newbie like me, I am trying to run a .sh inside my shell script. After running that I need to execute below commands. Here's how my scripts looks like. Hope you can help:
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Discussion started by: kamauv234
1 Replies
LEARN ABOUT PHP
pthread_atfork
PTHREAD_ATFORK(3) Library Functions Manual PTHREAD_ATFORK(3)NAME
pthread_atfork - register handlers to be called at fork(2) time
SYNOPSIS
#include <pthread.h>
int pthread_atfork(void (*prepare)(void), void (*parent)(void), void (*child)(void));
DESCRIPTION
pthread_atfork registers handler functions to be called just before and just after a new process is created with fork(2). The prepare han-
dler will be called from the parent process, just before the new process is created. The parent handler will be called from the parent
process, just before fork(2) returns. The child handler will be called from the child process, just before fork(2) returns.
One or several of the three handlers prepare, parent and child can be given as NULL, meaning that no handler needs to be called at the cor-
responding point.
pthread_atfork can be called several times to install several sets of handlers. At fork(2) time, the prepare handlers are called in LIFO
order (last added with pthread_atfork, first called before fork), while the parent and child handlers are called in FIFO order (first
added, first called).
To understand the purpose of pthread_atfork, recall that fork(2) duplicates the whole memory space, including mutexes in their current
locking state, but only the calling thread: other threads are not running in the child process. The mutexes are not usable after the fork
and must be initialized with pthread_mutex_init in the child process. This is a limitation of the current implementation and might or
might not be present in future versions.
RETURN VALUE
pthread_atfork returns 0 on success and a non-zero error code on error.
ERRORS
ENOMEM insufficient memory available to register the handlers.
AUTHOR
Xavier Leroy <Xavier.Leroy@inria.fr>
SEE ALSO fork(2), pthread_mutex_lock(3), pthread_mutex_unlock(3).
LinuxThreads PTHREAD_ATFORK(3)
04-11-2018
What it wrong is that you can't execute source code. You have to compile it first and run the executable code that is produced from that source. But, as I implied with all of the questions about what errors you got when you tried to compile first.c (which you still haven't answered), I'm not at all surprised that you didn't get an executable file named example1. Fix all of the errors in your source code (missing #include lines for the headers that contain the prototypes for the functions you're using, misspelled function names, incorrect types on function arguments, and strongly consider checking return codes on functions like wait, execlp, and fork.