From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,7e32386ac8078f13 X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!postnews.google.com!c13g2000cwb.googlegroups.com!not-for-mail From: "Adrian Hoe" Newsgroups: comp.lang.ada Subject: Re: POSIX.Memory_Mapping.Map_Memory Date: 30 Jan 2005 08:05:56 -0800 Organization: http://groups.google.com Message-ID: <1107101156.021780.150590@c13g2000cwb.googlegroups.com> References: <1107014307.952357.216870@f14g2000cwb.googlegroups.com> <1107016260.265640.138990@z14g2000cwz.googlegroups.com> <1107053159.644479.173850@z14g2000cwz.googlegroups.com> NNTP-Posting-Host: 219.95.187.180 Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" X-Trace: posting.google.com 1107101159 1842 127.0.0.1 (30 Jan 2005 16:05:59 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Sun, 30 Jan 2005 16:05:59 +0000 (UTC) In-Reply-To: User-Agent: G2/0.2 Complaints-To: groups-abuse@google.com Injection-Info: c13g2000cwb.googlegroups.com; posting-host=219.95.187.180; posting-account=LKUaWwwAAABzCo8SD2jIIt5LtkPzH8ot Xref: g2news1.google.com comp.lang.ada:8079 Date: 2005-01-30T08:05:56-08:00 List-Id: Mark Lorenzen wrote: > > Note that mmap wil NEVER return 0, so the check should be "if (buf == > MAP_FAILED)". > > > I corrected the above mentioned problem and successfully opened and > mapped a file. Strange. > Did you managed to open and map /dev/video0 after you change the line to if (buf == MAP_FAILED)? Or could it be a problem with distro? Which Linux distro are you using? -- Adrian Hoe