01-29-2009
10 More Discussions You Might Find Interesting
1. Programming
hi guys, I'have a question 4 u.
Why this code give me the right output (an integer on the stdout):
read(fd,&mpid,sizeof(pid_t));
printf("%d\n",mpid);
Instead this code give me only a blank line:
read(fd,&mpid,sizeof(pid_t));
write(STDOUT_FILENO,&mpid,sizeof(pid_t));
... (2 Replies)
Discussion started by: M3xican
2 Replies
2. Shell Programming and Scripting
Hi folks,
Need your help.
I am writing a KSH script to read a few commands from a file & execute.
I am using the following code to read the file line by line & excute each command. When I am printing each line I see it is printing properly but while excuting, the particular "ps" command... (5 Replies)
Discussion started by: tipsy
5 Replies
3. Programming
Hello mates:
I met problem with using read() & write(). I m trying to use read twice on client first time is the size of buffer, 2nd time is the buffer. I think I have to, coz I dnot know file size. So, I write twice on server as well -- 1st, filesize; 2nd, buffer.
The problem is, sometimes,... (11 Replies)
Discussion started by: EltonSky
11 Replies
4. UNIX for Dummies Questions & Answers
I am perplexed that my script execution is not always consistent in creating new files. Specifically, my group read/write/execute permissions. For instance, take a look at the following:
-rw-rw---- 1 jg dp 18648 Aug 22 10:06 nx081508.txt
-rw-rw---- 1 jg dp 22422 Aug 22 10:06... (1 Reply)
Discussion started by: joeyg
1 Replies
5. UNIX for Dummies Questions & Answers
Hi all,
I want to know what is difference between read & execute permission for a directory.
Thanx in advance (1 Reply)
Discussion started by: vishwasrao
1 Replies
6. Shell Programming and Scripting
Hi,
root@server] df -h
121G 14G 101G 12% /home
147G 126G 14G 91% /backup
We having our site files and images are storing in
/backup/home/user/files/ through symbolic link created in /home directory pointing in /backup directory as following.
root@server] cd /home... (1 Reply)
Discussion started by: mirfan
1 Replies
7. Shell Programming and Scripting
Hi, I hope the title does not scare people to look into this thread but it describes roughly what I'm trying to do. I need a solution in PHP.
I'm a programming beginner, so it might be that the approach to solve this, might be easier to solve with an other approach of someone else, so if you... (0 Replies)
Discussion started by: lowmaster
0 Replies
8. Shell Programming and Scripting
I want to check access rights permissions not for 'user', not for 'group', but for 'others'.
I want to do it by system command in which i want to use 'ls -l' and 'awk' command.
I have written the following program :
#!/usr/bin/local/perl
#include <stdlib.h>
system ("ls -l | awk... (1 Reply)
Discussion started by: shubhamsachdeva
1 Replies
9. UNIX for Dummies Questions & Answers
How to use MAN to find information about read() and write() function ?
The command "man read" show some rubbish, for example "man open" show great information about function I need. (2 Replies)
Discussion started by: bbqtoss
2 Replies
10. Shell Programming and Scripting
Hi,
I'm writing a post-upgrade script and I want to find which files don't have read and execute to everyone.
I can run a find . ! -perm, but then I have to use a list of the possible permissions (777,775, 755 etc). Is there a more elegant solution?
Thanks (2 Replies)
Discussion started by: Catullus
2 Replies
CHMOD(2) System Calls Manual CHMOD(2)
NAME
chmod - change mode of file
SYNOPSIS
chmod(name, mode)
char *name;
DESCRIPTION
The file whose name is given as the null-terminated string pointed to by name has its mode changed to mode. Modes are constructed by ORing
together some combination of the following:
04000 set user ID on execution
02000 set group ID on execution
01000 save text image after execution
00400 read by owner
00200 write by owner
00100 execute (search on directory) by owner
00070 read, write, execute (search) by group
00007 read, write, execute (search) by others
If an executable file is set up for sharing (-n or -i option of ld(1)) then mode 1000 prevents the system from abandoning the swap-space
image of the program-text portion of the file when its last user terminates. Thus when the next user of the file executes it, the text
need not be read from the file system but can simply be swapped in, saving time. Ability to set this bit is restricted to the super-user
since swap space is consumed by the images; it is only worth while for heavily used commands.
Only the owner of a file (or the super-user) may change the mode. Only the super-user can set the 1000 mode.
SEE ALSO
chmod(1)
DIAGNOSTIC
Zero is returned if the mode is changed; -1 is returned if name cannot be found or if current user is neither the owner of the file nor the
super-user.
ASSEMBLER
(chmod = 15.)
sys chmod; name; mode
CHMOD(2)