pSOSystem System Calls - Read

pREPC+ System Calls ungetc
ungetc Ungets a character.
#include
#include
int ungetc(
int c, /* character */
FILE *stream /* stream pointer */
)
Description
Arguments
Return Value
Error Codes
The ungetc() function pushes a character (c), converted to an unsigned char,
back to the specified stream. The character is returned on the next read operation
on the stream. A call to fseek(), fsetpos(), rewind(), or fflush() ignores the
character.
The stream’s position indicator is not changed by this call.
c Specifies the character to be pushed.
stream Points to an open pREPC+ stream.
This function returns the contents of c. If an error occurs, the function returns EOF
and sets errno.
Refer to Appendix B.
pSOSystem System Calls 3-181
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