4.21 fputs—write a character string in a file or stream

Synopsis

     #include <stdio.h>
     int fputs(const char *s, FILE *fp);
     
     #include <stdio.h>
     int _fputs_r(struct _reent *ptr, const char *s, FILE *fp);
     

Description
fputs writes the string at s (but without the trailing null) to the file or stream identified by fp.

_fputs_r is simply the reentrant version of fputs that takes an additional reentrant struct pointer argument: ptr.

Returns
If successful, the result is 0; otherwise, the result is EOF.

Portability
ANSI C requires fputs, but does not specify that the result on success must be 0; any non-negative value is permitted.

Supporting OS subroutines required: close, fstat, isatty, lseek, read, sbrk, write.