mmap_private opens the file for reading, not for writing
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mmap.h
2
mmap.h
@ -15,7 +15,7 @@ const char* mmap_read(const char *filename,size_t* filesize);
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/* like mmap_read but use openat instead of open */
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const char* mmap_readat(const char *filename,size_t* filesize,int dirfd);
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/* open file for writing, mmap whole file privately (copy on write),
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/* open file for reading, mmap whole file privately (copy on write),
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* close file, write length of map in filesize and return pointer to
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* map. */
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char* mmap_private(const char *filename,size_t* filesize);
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