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#ifndef OPEN_H
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#define OPEN_H
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/* open filename for reading and return the file handle or -1 on error */
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int open_read(const char *filename);
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/* create filename for exclusive write only use (mode 0600) and return
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* the file handle or -1 on error */
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int open_excl(const char *filename);
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/* open filename for appending write only use (mode 0600)
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* and return the file handle or -1 on error.
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* All write operation will append after the last byte, regardless of
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* seeking or other processes also appending to the file. The file will
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* be created if it does not exist. */
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int open_append(const char *filename);
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/* open filename for writing (mode 0644). Create the file if it does
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* not exist, truncate it to zero length otherwise. Return the file
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* handle or -1 on error. */
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int open_trunc(const char *filename);
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/* open filename for writing. Create the file if it does not exist.
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* Return the file handle or -1 on error. */
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int open_write(const char *filename);
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#endif
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