diff options
Diffstat (limited to 'tcl8.6/doc/Access.3')
| -rw-r--r-- | tcl8.6/doc/Access.3 | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/tcl8.6/doc/Access.3 b/tcl8.6/doc/Access.3 new file mode 100644 index 0000000..699d7ed --- /dev/null +++ b/tcl8.6/doc/Access.3 @@ -0,0 +1,71 @@ +'\" +'\" Copyright (c) 1998-1999 Scriptics Corporation +'\" +'\" See the file "license.terms" for information on usage and redistribution +'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. +'\" +.TH Tcl_Access 3 8.1 Tcl "Tcl Library Procedures" +.so man.macros +.BS +.SH NAME +Tcl_Access, Tcl_Stat \- check file permissions and other attributes +.SH SYNOPSIS +.nf +\fB#include <tcl.h>\fR +.sp +int +\fBTcl_Access\fR(\fIpath\fR, \fImode\fR) +.sp +int +\fBTcl_Stat\fR(\fIpath\fR, \fIstatPtr\fR) +.SH ARGUMENTS +.AS "struct stat" *statPtr out +.AP char *path in +Native name of the file to check the attributes of. +.AP int mode in +Mask consisting of one or more of \fBR_OK\fR, \fBW_OK\fR, \fBX_OK\fR and +\fBF_OK\fR. \fBR_OK\fR, \fBW_OK\fR and \fBX_OK\fR request checking whether the +file exists and has read, write and execute permissions, respectively. +\fBF_OK\fR just requests a check for the existence of the file. +.AP "struct stat" *statPtr out +The structure that contains the result. +.BE +.SH DESCRIPTION +.PP +As of Tcl 8.4, the object-based APIs \fBTcl_FSAccess\fR and \fBTcl_FSStat\fR +should be used in preference to \fBTcl_Access\fR and \fBTcl_Stat\fR, wherever +possible. Those functions also support Tcl's virtual filesystem layer, which +these do not. +.SS "OBSOLETE FUNCTIONS" +.PP +There are two reasons for calling \fBTcl_Access\fR and \fBTcl_Stat\fR rather +than calling system level functions \fBaccess\fR and \fBstat\fR directly. +First, the Windows implementation of both functions fixes some bugs in the +system level calls. Second, both \fBTcl_Access\fR and \fBTcl_Stat\fR (as well +as \fBTcl_OpenFileChannelProc\fR) hook into a linked list of functions. This +allows the possibility to reroute file access to alternative media or access +methods. +.PP +\fBTcl_Access\fR checks whether the process would be allowed to read, write or +test for existence of the file (or other file system object) whose name is +\fIpath\fR. If \fIpath\fR is a symbolic link on Unix, then permissions of the +file referred by this symbolic link are tested. +.PP +On success (all requested permissions granted), zero is returned. On error (at +least one bit in mode asked for a permission that is denied, or some other +error occurred), -1 is returned. +.PP +\fBTcl_Stat\fR fills the stat structure \fIstatPtr\fR with information about +the specified file. You do not need any access rights to the file to get this +information but you need search rights to all directories named in the path +leading to the file. The stat structure includes info regarding device, inode +(always 0 on Windows), privilege mode, nlink (always 1 on Windows), user id +(always 0 on Windows), group id (always 0 on Windows), rdev (same as device on +Windows), size, last access time, last modification time, and creation time. +.PP +If \fIpath\fR exists, \fBTcl_Stat\fR returns 0 and the stat structure is +filled with data. Otherwise, -1 is returned, and no stat info is given. +.SH KEYWORDS +stat, access +.SH "SEE ALSO" +Tcl_FSAccess(3), Tcl_FSStat(3) |