08-17-2006
if you are using glibc it may be better to use:
#define _GNU_SOURCE
#include <stdio.h>
char *buf;
asprintf(&buf,"cp %s/%s",src,dst); /* do not forget error check */
system(buf);
free(buf);
the advantage is that you have no limits for pathlenght.
you can also emulate asprintf with 2 calls to snprintf()
9 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hi,
Ho do I differentiate system call from library call?
for example if I am using chmod , how do I find out if it is a system call or library call?
Thanks
Muru (2 Replies)
Discussion started by: muru
2 Replies
2. Shell Programming and Scripting
Hello, I was wondering if it were possible to call arguments passed to a script using a variable.
For example:
sh script.sh yes no good bad
x=$#
while
do
echo (last argument, then second last etc until first argument)
let x=($x-1)
done
should print out
bad
good
no (4 Replies)
Discussion started by: VanK
4 Replies
3. Shell Programming and Scripting
Folks ,
can anyone post a sample showing a way to parse a variable containing a string to a .exe file .
Thanks
Venu (2 Replies)
Discussion started by: venu
2 Replies
4. UNIX for Dummies Questions & Answers
Hi,
I'm trying to understand the arguments from this system call, can someone help me figure it out?
write(1, "/home/nick/11sp/fred\n", 27/home/nick/11sp/fred) = 27
for argument 1, i know it is a file descriptor which specifies standard output. Argument 2, i believe is "what is to be... (4 Replies)
Discussion started by: l flipboi l
4 Replies
5. Homework & Coursework Questions
Write a program using select, which will create some number of child processes that continuously send text messages to the parent process using pipes. Each child has its own pipe that it uses to communicate with the parent. The parent uses select () to decide what pipes should be processed to... (1 Reply)
Discussion started by: ripssingh
1 Replies
6. Shell Programming and Scripting
This command successfully gives me the clearcase views I want in stdout, one line per view name. Each view name appears to have no spaces.
cleartool lsview | grep -i `uname -n` | grep -v "ViewStorage\\|vgr_tools_sv" | cut -f 3 -d ' '
How can write a cygwin bash "for" loop that will iterate... (4 Replies)
Discussion started by: siegfried
4 Replies
7. Shell Programming and Scripting
I need to call a function within a code with $database and $ service as the arguments How do I proceed ? and how would a function be defined and these two arguments would be used inside the function?
calc_pref_avail $database $service
Best regards,
Vishal (7 Replies)
Discussion started by: Vishal_dba
7 Replies
8. Shell Programming and Scripting
Dear All,
I want to know how can i call oracle function from shell script code . My oracle function have around 5 input parameters and one return value.
for name in *.csv;
do
echo "connecting to DB and start processing '$name' file at "
echo "csv file name=$x"
sqlplus -s scoot/tiger <!... (2 Replies)
Discussion started by: Balraj
2 Replies
9. Shell Programming and Scripting
I have a script that uses 2 arguments. I want to call the function part within this script using these same arguments. Below is what I came up with below script so far, any guidance would be helpful. Thank you!
cat backup.sh
#!/bin/bash
function usage {
echo "USAGE: $(basename $0)... (6 Replies)
Discussion started by: mbak
6 Replies
PASS(4) BSD Kernel Interfaces Manual PASS(4)
NAME
pass -- CAM application passthrough driver
SYNOPSIS
device pass
DESCRIPTION
The pass driver provides a way for userland applications to issue CAM CCBs to the kernel.
Since the pass driver allows direct access to the CAM subsystem, system administrators should exercise caution when granting access to this
driver. If used improperly, this driver can allow userland applications to crash a machine or cause data loss.
The pass driver attaches to every SCSI device found in the system. Since it attaches to every device, it provides a generic means of access-
ing SCSI devices, and allows the user to access devices which have no "standard" peripheral driver associated with them.
KERNEL CONFIGURATION
It is only necessary to configure one pass device in the kernel; pass devices are automatically allocated as SCSI devices are found.
IOCTLS
CAMIOCOMMAND This ioctl takes most kinds of CAM CCBs and passes them through to the CAM transport layer for action. Note that some CCB
types are not allowed through the passthrough device, and must be sent through the xpt(4) device instead. Some examples of
xpt-only CCBs are XPT_SCAN_BUS, XPT_DEV_MATCH, XPT_RESET_BUS, XPT_SCAN_LUN, XPT_ENG_INQ, and XPT_ENG_EXEC. These CCB types
have various attributes that make it illogical or impossible to service them through the passthrough interface.
CAMGETPASSTHRU This ioctl takes an XPT_GDEVLIST CCB, and returns the passthrough device corresponding to the device in question. Although
this ioctl is available through the pass driver, it is of limited use, since the caller must already know that the device in
question is a passthrough device if they are issuing this ioctl. It is probably more useful to issue this ioctl through the
xpt(4) device.
FILES
/dev/passn Character device nodes for the pass driver. There should be one of these for each device accessed through the CAM subsystem.
DIAGNOSTICS
None.
SEE ALSO
cam(3), cam(4), cam_cdbparse(3), xpt(4), camcontrol(8)
HISTORY
The CAM passthrough driver first appeared in FreeBSD 3.0.
AUTHORS
Kenneth Merry <ken@FreeBSD.org>
BUGS
It might be nice to have a way to asynchronously send CCBs through the passthrough driver. This would probably require some sort of
read/write interface or an asynchronous ioctl interface.
BSD October 10, 1998 BSD