2009-09-08 09:23:52     about mmap function

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2009-09-08 09:23:52     about mmap function

xm ye (CHINA)

Message: 79678   

 

hi,

i use an test application that used mmap function, here is snippets:

 

mem = mmap(0 /* start anywhere */ ,

                vlength, PROT_READ, MAP_SHARED, fd,offset);

     

 

if (mem == MAP_FAILED) {

            perror("Unable to map buffer");

            goto fatal;

        }

 

 

 

the application can't run ,the mem's value is MAP_FAILED. Dose mmap fucntion work need some condtion??

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2009-09-08 10:20:52     Re: about mmap function

Mike Frysinger (UNITED STATES)

Message: 79682   

 

like the documentation says everywhere, dont use MAP_SHARED

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