author | Graeme Price <GRAEME.PRICE@NOKIA.COM> |
Fri, 15 Oct 2010 14:32:18 +0100 | |
changeset 15 | 307f4279f433 |
parent 14 | 578be2adaf3e |
permissions | -rw-r--r-- |
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<?xml version="1.0" encoding="utf-8"?> |
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. --> |
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<!-- This component and the accompanying materials are made available under the terms of the License |
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"Eclipse Public License v1.0" which accompanies this distribution, |
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". --> |
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<!-- Initial Contributors: |
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Nokia Corporation - initial contribution. |
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Contributors: |
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--> |
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<!DOCTYPE concept |
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PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
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<concept id="GUID-5777D16D-71FA-5929-9557-4C532C59ECBF" xml:lang="en"><title>Platform |
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Security Considerations</title><prolog><metadata><keywords/></metadata></prolog><conbody> |
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<p>Symbian platform v9.1 introduced <xref href="GUID-4BFEDD79-9502-526A-BA7B-97550A6F0601.dita">Platform |
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Security</xref> (the concept of Capabilities, Signing and Data Caging) to |
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protect a phone against malicious code. Granting a program certain capabilities |
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enables it to use protected operating system functionality, and signing an |
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installation file enables it to be installed onto different phones. </p> |
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<p>A program using the P.I.P.S. libraries may need certain capabilities in |
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order to use protected functionality to be available. The capabilities required |
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are listed in the program's makefile (or an MMP file on the Symbian |
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platform). For example, the following line added to a Symbian MMP file will |
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grant network access to a program. </p> |
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<codeblock id="GUID-4D511177-F8F2-56A1-AB6C-91B3B1F04FE5" xml:space="preserve">CAPABILITY NetworkServices</codeblock> |
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<p>Each Symbian program has access to a private area of storage in a <filepath>/private/<secureid>/</filepath> directory |
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where <codeph>secureid</codeph> is an identifier specified in the MMP file. |
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If a <codeph>secureid</codeph> is not specified in the MMP file, the <codeph>secureid</codeph> is |
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set from the program's third UID (Unique Identifier). Some extra capabilities |
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are required if the program wishes to have access to another program's private |
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area. Also it is worth noting that P.I.P.S. does not allow file descriptors |
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in private directories to be inherited. </p> |
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<section id="GUID-A4D36A90-314A-5EEA-A025-7135A9A60177"><title>Capabilities |
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supported for P.I.P.S. APIs</title> <p>The following table provides details |
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of the P.I.P.S. APIs and the capabilities that may need to be added. </p> <table id="GUID-4DF992C4-AE1E-56BC-B97F-BC411D02E3FF"> |
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<tgroup cols="2"><colspec colname="col0"/><colspec colname="col1"/> |
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<tbody> |
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<row> |
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<entry><p> <b>P.I.P.S. API</b> </p> </entry> |
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<entry><p> <b>Capabilities required</b> </p> </entry> |
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</row> |
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<row> |
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<entry><p> <xref href="GUID-D926453F-9D3F-3604-B6E1-9782C3779DDF.dita"><apiname>lstat()</apiname></xref>, <xref href="GUID-A89FA772-80F2-39E8-AEFB-B9B4E833A1FA.dita"><apiname>stat()</apiname></xref>, <xref href="GUID-BEE67FC6-54F4-3711-B367-87EF751472A7.dita"><apiname>tmpnam()</apiname></xref>, <xref href="GUID-C8EA1CF0-D221-3A9D-84B1-5ED8A6DA933F.dita"><apiname>tempnam()</apiname></xref>, <xref href="GUID-875BC63B-B23B-374C-A932-24701D8C8220.dita"><apiname>wstat()</apiname></xref> </p> </entry> |
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<entry><p> <codeph>None</codeph> if the path is not in the protected /sys/ |
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or /private/ directory. </p> <p> <codeph>AllFiles</codeph> if the path contains |
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the protected /sys/ directory. </p> <p> <codeph>AllFiles</codeph> if the path |
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contains the protected /private/ directory using another program's Secure |
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Identifier. </p> </entry> |
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</row> |
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<row> |
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<entry><p> <xref href="GUID-A9330ABF-23DD-3DAE-BCB5-1B2448EF34E3.dita"><apiname>open()</apiname></xref>, <xref href="GUID-FA8FEC6E-622F-3F06-B15F-7B9769616149.dita"><apiname>wfopen()</apiname></xref> </p> </entry> |
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<entry><p> <codeph>None</codeph> if the path is not in the protected /sys/ |
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or /private/ directory. </p> <p> <codeph>AllFiles</codeph> if the path contains |
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the protected /sys/ directory and read mode is specified. </p> <p> <codeph>TCB</codeph> if |
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the path contains the protected /sys/ directory and write mode is specified. |
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P.I.P.S. libraries do not have the TCB capability, and so it is not possible |
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to write to this directory. </p> <p> <codeph>AllFiles</codeph> if the path |
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contains the protected /private/ directory using another program's Secure |
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Identifier. </p> </entry> |
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</row> |
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<row> |
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<entry><p> <xref href="GUID-9AE17F91-D9F7-3DD5-8D6C-AC6BDD0BBF7D.dita"><apiname>access()</apiname></xref>, <xref href="GUID-96A8BB01-07F4-3701-8390-858E47B11068.dita"><apiname>chdir()</apiname></xref>, <xref href="GUID-F5DE6335-1C8B-31F6-A70F-DCA12C050836.dita"><apiname>chmod()</apiname></xref>, <xref href="GUID-7AE53522-A016-3CF2-9394-38A65A628FDF.dita"><apiname>creat()</apiname></xref>, <xref href="GUID-D441A5DF-C7B8-38A7-B386-62DB47D95DE2.dita"><apiname>fchmod()</apiname></xref>, <xref href="GUID-A745D453-FD35-36AC-B2A6-1B118FC0ECE7.dita"><apiname>ftok()</apiname></xref>, <xref href="GUID-5EA72F64-E826-3B15-9468-902BD57F6AA7.dita"><apiname>mkdir()</apiname></xref>, <xref href="GUID-F4749DAA-1B29-3D1D-A3AA-0D52B851E501.dita"><apiname>mkfifo()</apiname></xref>, <xref href="GUID-28E8C6E1-93F6-326B-8B10-6EFCC19A71B8.dita"><apiname>rename()</apiname></xref>, <xref href="GUID-0A4E12DC-191F-3093-8FCC-1F09BC057EF8.dita"><apiname>rmdir()</apiname></xref>, <xref href="GUID-D8A63E18-878B-3AD4-863D-269E974ED8B2.dita"><apiname>utimes()</apiname></xref>, <xref href="GUID-7F392C01-C20D-3625-A964-F41BB925A5CC.dita"><apiname>waccess()</apiname></xref>, <xref href="GUID-13413FF7-5CAB-38DB-97FC-A4E45E076696.dita"><apiname>wchdir()</apiname></xref>, <xref href="GUID-48438139-E717-3E86-ACD4-E81D6482B659.dita"><apiname>wcreat()</apiname></xref>, <xref href="GUID-F173F204-ECCE-3FC8-B3BF-4F58513A7D0C.dita"><apiname>wmkdir()</apiname></xref>, <xref href="GUID-16518B7B-C146-32E6-9360-A4EEF268CA98.dita"><apiname>wrmdir()</apiname></xref>, <xref href="GUID-F33C1971-5E72-331A-B699-CC32D36B7584.dita"><apiname>wunlink()</apiname></xref>, <xref href="GUID-5F612E71-362E-37D8-A457-8AF1AB545496.dita"><apiname>unlink()</apiname></xref>, <xref href="GUID-234DE8F8-1D41-3BE0-980B-37ACF281DDA6.dita"><apiname>utime()</apiname></xref> </p> </entry> |
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<entry><p> <codeph>None</codeph> if the path is not in the protected /sys/, |
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/resource/ or /private/ directory. </p> <p> <codeph>TCB</codeph> if the path |
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contains the protected /sys/ or /resource/ directory. P.I.P.S. libraries do |
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not have the TCB capability, and so it is not possible to write to this directory. </p> <p> <codeph>AllFiles</codeph> if |
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the path contains the protected /private/ directory using another program's |
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Secure Identifier. </p> </entry> |
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</row> |
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<row> |
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<entry><p> <xref href="GUID-8B08EBCD-937C-3704-8E6A-08A45881F70D.dita"><apiname>accept()</apiname></xref>, <xref href="GUID-DD961B2B-AAEE-3A83-81E2-0B9F7BE58BE6.dita"><apiname>bind()</apiname></xref>, <xref href="GUID-B1E46044-267D-3F35-9712-F1A0D7E8F03F.dita"><apiname>connect()</apiname></xref>, <xref href="GUID-F923CE02-3850-3494-95FE-094506318F10.dita"><apiname>ioctl()</apiname></xref>, <xref href="GUID-4BE12A23-0E4D-37CC-891C-6B9931CA2E7A.dita"><apiname>recv()</apiname></xref>, <xref href="GUID-45F73DAA-7E14-307A-BE55-FFCAEA898A86.dita"><apiname>recvfrom()</apiname></xref>, <xref href="GUID-0D328B4A-15D0-36EB-B92E-E285A11F1ABC.dita"><apiname>send()</apiname></xref>, <xref href="GUID-2E55A695-EE36-37F3-A088-2BA282B8EA9F.dita"><apiname>sendto()</apiname></xref>, <xref href="GUID-CCE203C4-7985-3FF7-829B-CF3873D62098.dita"><apiname>recvmsg()</apiname></xref>, <xref href="GUID-F580A280-7797-3D55-B1C3-1CACC0429830.dita"><apiname>sendmsg()</apiname></xref> </p> </entry> |
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<entry><p> <codeph>None</codeph> if the descriptor does not refer to a socket. </p> <p> <codeph>NetworkServices</codeph> if |
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the descriptor is a socket. </p> </entry> |
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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73 |
</row> |
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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74 |
</tbody> |
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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75 |
</tgroup> |
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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76 |
</table> </section> |
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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<example><title>A P.I.P.S. platform security example</title> <p>The following |
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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code illustrates how P.I.P.S. conforms to Data Caging rules while creating |
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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a file with and without capabilities. </p> <codeblock id="GUID-680669E9-0261-5A1C-9A20-67A5148C440B" xml:space="preserve">#include <stdio.h> |
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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80 |
|
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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81 |
int main(int argc, char *argv[]) |
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82 |
{ |
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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FILE* file; |
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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84 |
|
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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85 |
//Create the file in another program's private directory |
578be2adaf3e
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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file = fopen("/private/10004902/out.file", "w"); |
578be2adaf3e
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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87 |
if (file == NULL) |
578be2adaf3e
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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88 |
{ |
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89 |
int I = errno; |
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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90 |
|
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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//Error occurred |
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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printf("\nError creating file, error=%d", errno); |
578be2adaf3e
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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return EXIT_FAILURE; |
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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94 |
} |
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95 |
else |
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Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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96 |
{ |
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//File created |
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98 |
fprintf(file, "Sample File Output"); |
578be2adaf3e
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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fclose(file); |
578be2adaf3e
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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100 |
|
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printf("\nFile created"); |
578be2adaf3e
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102 |
} |
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103 |
|
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return EXIT_SUCCESS; |
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}</codeblock> <p>If no capabilities are provided, the code will print out |
578be2adaf3e
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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an error message due to the attempted use of <xref href="GUID-64886CC6-072F-3542-855A-5D733FC761E8.dita"><apiname>fopen()</apiname></xref> on |
578be2adaf3e
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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another program's <filepath>/private/</filepath> directory. The error code |
578be2adaf3e
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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displayed will be <xref href="GUID-3148D2B9-FF17-35E1-A74B-50EBF1B79679.dita"><apiname>EACCESS</apiname></xref>, showing a security error. </p> <p>If, |
578be2adaf3e
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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however, the <codeph>AllFiles</codeph> capability is listed in the program's |
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MMP file, the file will be generated successfully. </p> <p> <b>Note:</b> Here, <codeph>AllFiles</codeph> represents |
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a system capability and is not something your application should require or |
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use, in most of the cases. </p> </example> |
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Week 12 contribution of PDK documentation_content. See release notes for details. Fixes Bug 2054, Bug 1583, Bug 381, Bug 390, Bug 463, Bug 1897, Bug 344, Bug 1319, Bug 394, Bug 1520, Bug 1522, Bug 1892"
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</conbody></concept> |