Linux Red Hat. I've build it also on openvms alpha 8.3. May be I can check it on a small example, where a stack corruption will be practically impossible.
---------- Post updated at 05:25 AM ---------- Previous update was at 04:44 AM ----------
So the experiment:
1. Without copying main.c Result:
$ ./a.out
123 - 321
Segmentation fault
I need to create a shared library to access an in memory DB. The DB is not huge, but big enough to make it cumbersome to carry around in every single process using the shared library. Luckily, it is pretty static information, so I don't need to worry much about synchronizing the data between... (12 Replies)
Hi all,
Well I've had a bit more experience with Unix-like environments since my last post, now that I have started working on my website in earnest and am doing much of the file manipulation via the command line through SSH.
The thing is, I want to be able to log all console activity,... (4 Replies)
I am writing a shared library in Linux (but compatible with other UNIXes) and I want to allow multiple instances to share a piece of memory -- 1 byte is enough. What's the "best" way to do this? I want to optimize for speed and portability.
Obviously, I'll have to worry about mutual exclusion. (0 Replies)
I am trying to figure a way to have a log file and still keep the output in the terminal in a script.
The example below logs to a file nicely but i still want the output in the terminal as well
#!/bin/bash
#Create a log
exec >> /path/to/my/logfile
echo "hello world"
Any help would be... (3 Replies)
We are trying to install third party software on this unix server...
Here is the error message we are getting...
error while loading shared libraries: libodbc.so.1: cannot open shared object file: No such file or directory
It seems like odbc driver is not installed...
>rpm -q unixODBC... (1 Reply)
Hello.
I am new to this forum and I would like to ask for advice about low level POSIX programming.
I have to implement a POSIX compliant C shared library.
A file will have some variables and the shared library will have some functions which need those variables.
There is one special... (5 Replies)
Hi,
I've the following code to log the errors any after the command is executed.
# Ksh 88 Version
log_path=/home/etc/fls/fls_log.log
del_path=/home/etc/fls/to_day
rm $del_path/* >> $log_path 2>&1
But I even want to log if the rm command is success without any error along with... (1 Reply)
When unlocking a Linux server's console there's no event indicating successful logging
Is there a way I can fix this ?
I have the following in my rsyslog.conf
auth.info /var/log/secure
authpriv.info /var/log/secure (1 Reply)
Hi,
While running tcpdump command on my Fedora 16 machine I am get shared library issue.
# tcpdump
tcpdump: error while loading shared libraries: libcrypto.so.6: cannot open shared object file: No such file or directory
# which tcpdump
/usr/software/sbin/tcpdump
I have tried... (3 Replies)
Discussion started by: muzaffar.k
3 Replies
LEARN ABOUT FREEBSD
sem_init
SEM_INIT(3) BSD Library Functions Manual SEM_INIT(3)NAME
sem_init -- initialize an unnamed semaphore
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <semaphore.h>
int
sem_init(sem_t *sem, int pshared, unsigned int value);
DESCRIPTION
The sem_init() function initializes the unnamed semaphore pointed to by sem to have the value value.
A non-zero value for pshared specifies a shared semaphore that can be used by multiple processes, the semaphore should be located in shared
memory region (see mmap(2), shm_open(2), and shmget(2)), any process having read and write access to address sem can perform semaphore opera-
tions on sem.
Following a successful call to sem_init(), sem can be used as an argument in subsequent calls to sem_wait(3), sem_trywait(3), sem_post(3),
and sem_destroy(3). The sem argument is no longer valid after a successful call to sem_destroy(3).
RETURN VALUES
The sem_init() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indi-
cate the error.
ERRORS
The sem_init() function will fail if:
[EINVAL] The value argument exceeds SEM_VALUE_MAX.
[ENOSPC] Memory allocation error.
SEE ALSO sem_destroy(3), sem_getvalue(3), sem_post(3), sem_trywait(3), sem_wait(3)STANDARDS
The sem_init() function conforms to ISO/IEC 9945-1:1996 (``POSIX.1'').
BSD January 9, 2010 BSD