1PUTS(3)                    Linux Programmer's Manual                   PUTS(3)
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NAME

6       fputc, fputs, putc, putchar, puts - output of characters and strings
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SYNOPSIS

9       #include <stdio.h>
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11       int fputc(int c, FILE *stream);
12       int putc(int c, FILE *stream);
13       int putchar(int c);
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15       int fputs(const char *restrict s, FILE *restrict stream);
16       int puts(const char *s);
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DESCRIPTION

19       fputc() writes the character c, cast to an unsigned char, to stream.
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21       putc()  is equivalent to fputc() except that it may be implemented as a
22       macro which evaluates stream more than once.
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24       putchar(c) is equivalent to putc(c, stdout).
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26       fputs() writes the string s to stream,  without  its  terminating  null
27       byte ('\0').
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29       puts() writes the string s and a trailing newline to stdout.
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31       Calls  to the functions described here can be mixed with each other and
32       with calls to other output functions from the  stdio  library  for  the
33       same output stream.
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35       For nonlocking counterparts, see unlocked_stdio(3).
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RETURN VALUE

38       fputc(),  putc(),  and putchar() return the character written as an un‐
39       signed char cast to an int or EOF on error.
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41       puts() and fputs() return a nonnegative number on success,  or  EOF  on
42       error.
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ATTRIBUTES

45       For  an  explanation  of  the  terms  used  in  this  section,  see at‐
46       tributes(7).
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48       ┌────────────────────────────────────────────┬───────────────┬─────────┐
49       │Interface                                   │ Attribute     │ Value   │
50       ├────────────────────────────────────────────┼───────────────┼─────────┤
51       │fputc(), fputs(), putc(), putchar(), puts() │ Thread safety │ MT-Safe │
52       └────────────────────────────────────────────┴───────────────┴─────────┘
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CONFORMING TO

55       POSIX.1-2001, POSIX.1-2008, C89, C99.
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BUGS

58       It is not advisable to mix calls to output functions from the stdio li‐
59       brary  with low-level calls to write(2) for the file descriptor associ‐
60       ated with the same output stream; the results  will  be  undefined  and
61       very probably not what you want.
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SEE ALSO

64       write(2),   ferror(3),   fgets(3),   fopen(3),   fputwc(3),  fputws(3),
65       fseek(3), fwrite(3), putwchar(3), scanf(3), unlocked_stdio(3)
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COLOPHON

68       This page is part of release 5.13 of the Linux  man-pages  project.   A
69       description  of  the project, information about reporting bugs, and the
70       latest    version    of    this    page,    can     be     found     at
71       https://www.kernel.org/doc/man-pages/.
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75GNU                               2021-03-22                           PUTS(3)
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