Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: fcntl works in linux but not in mac os x
Top Forums Programming fcntl works in linux but not in mac os x Post 302295416 by jim mcnamara on Sunday 8th of March 2009 06:22:23 AM
Old 03-08-2009
POSIX standards specify what has to be in a struct, the standards do not restrict additional struct members.

From POSIX on struct fl:
Code:
The structure flock describes a file lock. It shall include the following members:

short  l_type   Type of lock; F_RDLCK, F_WRLCK, F_UNLCK. 
short  l_whence Flag for starting offset. 
off_t  l_start  Relative offset in bytes. 
off_t  l_len    Size; if 0 then until EOF. 
pid_t  l_pid    Process ID of the process holding the lock; returned with F_GETLK. 

The mode_t, off_t, and pid_t types shall be defined as described in <sys/types.h>.

 

10 More Discussions You Might Find Interesting

1. Programming

I have no clue what's the point - fcntl() ?

hi, I need to know how to lock a file. I used the following code, but after executing the program the file 'write.txt' remined empty, and I have no idea why.Maybe I'm not using the corresponding syntax for blocking a file. But I deleted then the blocking part and the problem persisted. see to... (2 Replies)
Discussion started by: atticus
2 Replies

2. Shell Programming and Scripting

Script works on Solaris, not on Linux

I'm in the same boat as Barbus - same exercis (https://www.unix.com/shell-programming-scripting/43609-processes-users.html) The following script works on a solaris server I have access to. It doesn't however, work on the companies Linux machine. Any idea what's up? I have very little shell... (0 Replies)
Discussion started by: Silverhood
0 Replies

3. Programming

fcntl on socket

I have very simple client - server setup, where client connects, exchanges some messages with the server and then closes socket and exits. Everythink works OK, except when I am trying to change socket to be non-blocking AND the shell happens to be plain old Bourne. It runs no problem under ksh or... (3 Replies)
Discussion started by: migurus
3 Replies

4. Shell Programming and Scripting

awk -F works on Linux, but not on Solaris

Hello, I found this command works on Linux: $ echo `uptime` | awk -F "load average: " '{ print $2 }' 1.60, 1.53, 1.46 but got error on Solaris: $ echo `uptime` | awk -F "load average: " '{ print $2 }' awk: syntax error near line 1 awk: bailing out near line 1 $ which awk... (2 Replies)
Discussion started by: seafan
2 Replies

5. Shell Programming and Scripting

File Locking with fcntl on Darwin Mac OSX

Hello I have a Perl script that works on non-darwin Mac OS X environments and I think I have narrowed down the issue to a file locking problem. In other linux environments, the flock struct is defined differently. I have adjusted this via the reference for Mac OS X fcntl(2) man page. The... (4 Replies)
Discussion started by: flagman5
4 Replies

6. Shell Programming and Scripting

sed command works on Fedora/Ubuntu, but doesn't work in Mac

Hi, I have a question. I define a function using sed command: replace() { searchterm=$1 replaceterm=$2 sed -e "s/$searchterm/$replaceterm/ig" $3 > $WORK'tempfile.tmp' mv $WORK'tempfile.tmp' $3 } Then I call replace 'test = 0' 'test = 1' $myfileThis code works well in... (1 Reply)
Discussion started by: Dark2Bright
1 Replies

7. Shell Programming and Scripting

sed command works on Fedora/Ubuntu, but doesn't work in Mac

Hi, I have a question. I define a function using sed command: replace() { searchterm=$1 replaceterm=$2 sed -e "s/$searchterm/$replaceterm/ig" $3 > $WORK'tempfile.tmp' mv $WORK'tempfile.tmp' $3 } Then I call replace 'test = 0' 'test = 1' $myfile This code... (1 Reply)
Discussion started by: Dark2Bright
1 Replies

8. Linux

Block with fcntl

Good evening, friends I'm learning with a book: Programming Linux by Kurt Wall (Prentice Hall) The code below could run in two windows (./lockit /tmp/foo in both for example). There is not problem with the read block (first byte) but when one, apply the write block while in the other is... (1 Reply)
Discussion started by: joe_cosmo
1 Replies

9. Shell Programming and Scripting

Why statement works in LINUX and not UNIX?

Hello, I have a ksh script that uses code below. For some reason it works under linux but fails in unix. Any idea why? if ]; then ... Thanks (9 Replies)
Discussion started by: rdogadin
9 Replies

10. Hardware

Does this hardware works with Linux

Hello folks, I pretend acquire this hardware: 1-Motherboard Asus Skt1151 - H110M-A/M.2 (https://www.asus.com/pt/Motherboards...cifications/); 2-Intel i5 6400 2.7Ghz QuadCore Skt1151; or 2-Intel i5 6500 3.2Ghz QuadCore Skt1151; 3-Dimm 8GB DDR4 Kingston CL15 2133Mhz; Obvious I pretend... (1 Reply)
Discussion started by: enodev
1 Replies

LEARN ABOUT DEBIAN

mkfs.bfs

MKFS.BFS(8)						       System Administration						       MKFS.BFS(8)

NAME

       mkfs.bfs - make an SCO bfs filesystem

SYNOPSIS

       mkfs.bfs [options] device [block-count]

DESCRIPTION

       mkfs.bfs creates an SCO bfs filesystem on a block device (usually a disk partition or a file accessed via the loop device).

       The block-count parameter is the desired size of the filesystem, in blocks.  If nothing is specified, the entire partition will be used.

OPTIONS

       -N, --inodes number
	      Specify  the  desired  number  of  inodes (at most 512).	If nothing is specified, some default number in the range 48-512 is picked
	      depending on the size of the partition.

       -V, --vname label
	      Specify the volume label.  I have no idea if/where this is used.

       -F, --fname name
	      Specify the filesystem name.  I have no idea if/where this is used.

       -v, --verbose
	      Explain what is being done.

       -c     This option is silently ignored.

       -l     This option is silently ignored.

       -h, --help
	      Display help text and exit.

       -V, --version
	      Output version information and exit.  Option -V only works as --version when it is the only option.

EXIT CODES

       The exit code returned by mkfs.bfs is 0 when all went well, and 1 when something went wrong.

SEE ALSO

       mkfs(8).

AVAILABILITY

       The mkfs.bfs command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

util-linux							     July 2011							       MKFS.BFS(8)
All times are GMT -4. The time now is 02:06 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy