RV-NONAME(3)               Library Functions Manual               RV-NONAME(3)

NNAAMMEE
     - return value macro without an available name

RREETTUURRNN VVAALLUUEESS
     no arguments:
     Upon successful completion, the value 0 is returned; otherwise the
     value -1 is returned and the global variable _e_r_r_n_o is set to indicate the
     error.

     one argument:
     The oonnee() function returns the value 0 if successful; otherwise the
     value -1 is returned and the global variable _e_r_r_n_o is set to indicate the
     error.

     two arguments:
     The oonnee() and ttwwoo() functions return the value 0 if successful; otherwise
     the value -1 is returned and the global variable _e_r_r_n_o is set to indicate
     the error.

OpenBSD                          July 4, 2017                          OpenBSD