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19 #define O_RDWR (O_RDONLY | O_WRONLY)
35 #define O_NOWAIT 32768
37 #define O_ASYNC O_NOWAIT
60 #define open(filename, flags, ...) \
67 int open(
char *filename,
int flags);
68 int read(
int d,
void *buf,
int nbytes);
70 int lseek(
int fildes,
int offset,
int whence);