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an unsigned value; it returns -1 if an error occurs so it must return a signed value.
The write function returns the number of bytes successfully written into the file, which may at times be less than the specified nbytes. It returns -1 if an exceptional condition is encountered, see section on errors below.

Linux

Historically, Linux would use different system call tables for different architectures. write has the call number 1 on x86-64,

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