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Full Discussion: File Locking in Unix
Top Forums UNIX for Dummies Questions & Answers File Locking in Unix Post 54318 by solea on Tuesday 10th of August 2004 07:50:47 AM
Old 08-10-2004
I was talking of the "file permission kludge" (sorry, translation are sometimes difficults). I never used it so far but I understand from the man page that some applications can use this file permission (if exists) to lock file while using it. Is it correct?

Anyway thanks for the code, I'm almost certain I will use it one day.
Thanks.
 

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ACL_GET_PERM_NP(3)					   BSD Library Functions Manual 					ACL_GET_PERM_NP(3)

NAME
acl_get_perm_np -- check if a permission is set in a permission set LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <sys/types.h> #include <sys/acl.h> int acl_get_perm_np(acl_permset_t permset_d, acl_perm_t perm); DESCRIPTION
The acl_get_perm_np() function is a non-portable function that checks if a permission is set in a permission set. RETURN VALUES
If the permission in perm is set in the permission set permset_d, a value of 1 is returned, otherwise a value of 0 is returned. ERRORS
If any of the following conditions occur, the acl_get_perm_np() function will return a value of -1 and set global variable errno to the cor- responding value: [EINVAL] Argument perm does not contain a valid ACL permission or argument permset_d is not a valid ACL permset. SEE ALSO
acl(3), acl_add_perm(3), acl_clear_perms(3), acl_delete_perm(3), acl_get_permset(3), acl_set_permset(3), posix1e(3) STANDARDS
POSIX.1e is described in IEEE POSIX.1e draft 17. AUTHORS
Michael Smith Chris D. Faulhaber BSD
April 10, 2001 BSD
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