29 lines
588 B
C
29 lines
588 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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int main()
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{
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char *buffer;
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struct stat s;
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int fd = open("readentirefile_mm.c", O_RDONLY);
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if (fd < 0 ) return EXIT_FAILURE;
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fstat(fd, &s);
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/* PROT_READ disallows writing to buffer: will segv */
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buffer = mmap(0, s.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
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if ( buffer != (void*)-1 )
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{
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/* do something */
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fwrite(buffer, s.st_size, 1, stdout);
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munmap(buffer, s.st_size);
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}
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close(fd);
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return EXIT_SUCCESS;
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}
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