ST_READY status confusion in st.c

[pradeep singh <2500.pradeep@xxxxxxxxx>]

Hi all

in file st.c 

598    if( STp->ready ! = ST_READY )  /* here ST_READY is a macro eq to 0 declared in st.h */
599            return 0;

well it means if the tape is not ready return 0.
why are we returning 0 in when tape in not ready? shouldnt it be return a positive value as required? 

can anybody explain this to me?

thank you

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