Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

vop_access(9) [osx man page]

VOP_ACCESS(9)						   BSD Kernel Developer's Manual					     VOP_ACCESS(9)

NAME
VOP_ACCESS, VOP_ACCESSX -- check access permissions of a file or Unix domain socket SYNOPSIS
#include <sys/param.h> #include <sys/vnode.h> int VOP_ACCESS(struct vnode *vp, accmode_t accmode, struct ucred *cred, struct thread *td); int VOP_ACCESSX(struct vnode *vp, accmode_t accmode, struct ucred *cred, struct thread *td); DESCRIPTION
This entry point checks the access permissions of the file against the given credentials. Its arguments are: vp The vnode of the file to check. accmode The type of access required. cred The user credentials to check. td The thread which is checking. The accmode is a mask which can contain flags described in <sys/vnode.h>, e.g. VREAD, VWRITE or VEXEC. For VOP_ACCESS(), the only flags that may be set in accmode are VEXEC, VWRITE, VREAD, VADMIN and VAPPEND. To check for other flags, one has to use VOP_ACCESSX() instead. LOCKS
The vnode will be locked on entry and should remain locked on return. RETURN VALUES
If the file is accessible in the specified way, then zero is returned, otherwise an appropriate error code is returned. ERRORS
[EPERM] An attempt was made to change an immutable file. [EACCES] The permission bits the file mode or the ACL do not permit the requested access. SEE ALSO
vaccess(9), vaccess_acl_nfs4(9), vaccess_acl_posix1e(9), vnode(9) AUTHORS
This manual page was written by Doug Rabson. BSD
September 18, 2009 BSD

Check Out this Related Man Page

VOP_ACCESS(9)						   BSD Kernel Developer's Manual					     VOP_ACCESS(9)

NAME
VOP_ACCESS, VOP_ACCESSX -- check access permissions of a file or Unix domain socket SYNOPSIS
#include <sys/param.h> #include <sys/vnode.h> int VOP_ACCESS(struct vnode *vp, accmode_t accmode, struct ucred *cred, struct thread *td); int VOP_ACCESSX(struct vnode *vp, accmode_t accmode, struct ucred *cred, struct thread *td); DESCRIPTION
This entry point checks the access permissions of the file against the given credentials. Its arguments are: vp The vnode of the file to check. accmode The type of access required. cred The user credentials to check. td The thread which is checking. The accmode is a mask which can contain flags described in <sys/vnode.h>, e.g. VREAD, VWRITE or VEXEC. For VOP_ACCESS(), the only flags that may be set in accmode are VEXEC, VWRITE, VREAD, VADMIN and VAPPEND. To check for other flags, one has to use VOP_ACCESSX() instead. LOCKS
The vnode will be locked on entry and should remain locked on return. RETURN VALUES
If the file is accessible in the specified way, then zero is returned, otherwise an appropriate error code is returned. ERRORS
[EPERM] An attempt was made to change an immutable file. [EACCES] The permission bits the file mode or the ACL do not permit the requested access. SEE ALSO
vaccess(9), vaccess_acl_nfs4(9), vaccess_acl_posix1e(9), vnode(9) AUTHORS
This manual page was written by Doug Rabson. BSD
September 18, 2009 BSD
Man Page

13 More Discussions You Might Find Interesting

1. AIX

AIX Links

Manufacturer Links General Information Home Page: IBM United States Documentation/Information: IBM System p - UNIX servers: Support and services pSeries and AIX Information Center Developerworks AIX Wiki: AIX Wiki AIX for System Administrators In-depth information from IBM: IBM... (0 Replies)
Discussion started by: Perderabo
0 Replies

2. OS X (Apple)

Mac OS X: Based on UNIX - Solid As a Rock

See this threads: Page Not Found - Apple Open Source - Apple (0 Replies)
Discussion started by: Neo
0 Replies

3. Shell Programming and Scripting

At A Glance Coloured Real Time Bargraph Generator...

Not sure if anyone is interested but I am just getting into UNIX like shell scripting... I have great interest in pseudo-animations in text mode and accessing HW like /dev/dsp for example... ... Have fun, I do... ;o) # !/bin/sh # # Bargraph_Generator.sh # # A DEMO 6 bit coloured... (0 Replies)
Discussion started by: wisecracker
0 Replies

4. UNIX for Advanced & Expert Users

When is a _function_ not a _function_?

For a starter I know the braces are NOT in the code... Consider these code snippets:- #!/bin/bash --posix x=0 somefunction() if then echo "I am here." fi # somefunction #!/bin/bash --posix x=0 somefunction() if (2 Replies)
Discussion started by: wisecracker
2 Replies

5. OS X (Apple)

Installing Dash Shell on OS X Lion

For those interested in installing dash shell on OSX Lion to help test POSIX compliancy of shell scripts, it is quite easy. I did it like this: If you don't have gcc on your system: 0. Download and install the Command Line Tools for Xcode package from Sign In - Apple * 1. Download the dash... (2 Replies)
Discussion started by: Scrutinizer
2 Replies

6. OS X (Apple)

Hearing Aid for OSX 10.12.x and greater.

Hearing Aid... Hi folks yet another bizarre piece of code that is Apple OSX 10.12.x to at least 10.14.1 specific. It requires only a default OSX install, and the internal microphone along with an external headphone assembly. Pre-amble, 14-02-2019: For over 3 weeks now I have been suffering a... (3 Replies)
Discussion started by: wisecracker
3 Replies

7. UNIX for Advanced & Expert Users

Shopt -s histappend

What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file. # When the shell exits, append to the history file instead of overwriting it shopt -s histappend (3 Replies)
Discussion started by: cokedude
3 Replies

8. OS X (Apple)

Undeletable file

Greetings, I'm trying to delete a file with a weird name from within Terminal on a Mac. It's a very old file (1992) with null characters in the name: ␀␀Word Finder® Plus™. Here are some examples of what I've tried: 12FX009:5 dpontius$ ls ␀␀Word Finder® Plus™ 12FX009:5 dpontius$ rm... (29 Replies)
Discussion started by: dpontius
29 Replies

9. Shell Programming and Scripting

To print diamond asterisk pattern based on inputs

I have to print the number of stars that increases on each line from the minimum number until it reaches the maximum number, and then decreases until it goes back to the minimum number. After printing out the lines of stars, it should also print the total number of stars printed. I have tried... (13 Replies)
Discussion started by: rohit_shinez
13 Replies

10. Programming

My first PERL incarnation... Audio Oscillograph

Hi all... Well guys and gals, I jumped in at the deep end and found things that PERL cannot do by default. Many tricky terminal escape codes are not catered for so I had to create workarounds. One thing I searched for was this: Passing perl variable to shell command AND, @Neo this was... (15 Replies)
Discussion started by: wisecracker
15 Replies

11. Shell Programming and Scripting

A dash to GOTO or a dash from GOTO, that is the question...

Well, guys I saw a question about GOTO for Python. So this gave me the inspiration to attempt a GOTO function for 'dash', (bash and ksh too). Machine: MBP OSX 10.14.3, default bash terminal, calling '#!/usr/local/bin/dash'... This is purely a fun project to see if it is possible in PURE... (3 Replies)
Discussion started by: wisecracker
3 Replies

12. Shell Programming and Scripting

Syntax error in subtraction in Bash

I am sharing a code snippet. for (( i=0; i<=$(( $count -1 )); i++ )) do first=${barr2} search=${barr1} echo $first echo "loop begins" for (( j=0; j<=5000; j++ )) do if } == $search ]]; then echo $j break; fi done second=${harr2} echo $second (2 Replies)
Discussion started by: ngabrani
2 Replies

13. Shell Programming and Scripting

Python: Refer a properties file from different location

Hi All, I'm having a python script: test.py in /path/to/script/test.py I'm using a properties file: test_properties.py (it is having values as dictionary{}) which is in same DIR as the script. Sample Properties file: params = { 'target_db' : 'a1_db' 'src_db' : ... (15 Replies)
Discussion started by: saps19
15 Replies