fgetc(3)                                              Library Functions Manual                                             fgetc(3)

       fgetc, fgets, getc, getchar, ungetc - input of characters and strings

       Standard C library (libc, -lc)

       #include <stdio.h>

       int fgetc(FILE *stream);
       int getc(FILE *stream);
       int getchar(void);

       char *fgets(char s[restrict .size], int size, FILE *restrict stream);

       int ungetc(int c, FILE *stream);

       fgetc() reads the next character from stream and returns it as an unsigned char cast to an int, or EOF on end of file or er‐

       getc() is equivalent to fgetc() except that it may be implemented as a macro which evaluates stream more than once.

       getchar() is equivalent to getc(stdin).

       fgets() reads in at most one less than size characters from stream and stores them into the buffer pointed to by s.  Reading
       stops  after  an  EOF  or a newline.  If a newline is read, it is stored into the buffer.  A terminating null byte ('\0') is
       stored after the last character in the buffer.

       ungetc() pushes c back to stream, cast to unsigned char, where it is available for subsequent read operations.   Pushed-back
       characters will be returned in reverse order; only one pushback is guaranteed.

       Calls  to  the  functions described here can be mixed with each other and with calls to other input functions from the stdio
       library for the same input stream.

       For nonlocking counterparts, see unlocked_stdio(3).

       fgetc(), getc(), and getchar() return the character read as an unsigned char cast to an int or EOF on end of file or error.

       fgets() returns s on success, and NULL on error or when end of file occurs while no characters have been read.

       ungetc() returns c on success, or EOF on error.

       For an explanation of the terms used in this section, see attributes(7).

       │Interface                                                                                        │ Attribute     │ Value   │
       │fgetc(), fgets(), getc(), getchar(), ungetc()                                                    │ Thread safety │ MT-Safe │

       POSIX.1-2001, POSIX.1-2008, C99.

       It is not advisable to mix calls to input functions from the stdio library with low-level calls to read(2) for the file  de‐
       scriptor associated with the input stream; the results will be undefined and very probably not what you want.

       read(2), write(2), ferror(3), fgetwc(3), fgetws(3), fopen(3), fread(3), fseek(3), getline(3), gets(3), getwchar(3), puts(3),
       scanf(3), ungetwc(3), unlocked_stdio(3), feature_test_macros(7)

Linux man-pages 6.03                                         2023-02-05                                                    fgetc(3)