Write a string to an open stream
Integer_Type fputs (String_Type s, File_Type fp);
The fputs function writes the string s to the open file
pointer fp. It returns -1 upon failure and sets errno,
otherwise it returns the length of the string.
The following function opens a file in append mode and uses the
fputs function to write to it.
define append_string_to_file (str, file)
{
variable fp;
fp = fopen (file, "a");
if (fp == NULL) verror ("Unable to open %s", file);
if ((-1 == fputs (s, fp))
or (-1 == fclose (fp)))
verror ("Error writing to %s", file);
}
One must not disregard the return value from the fputs
function, as many C programmers do. Doing so may lead to a stack
overflow error.
To write an object that contains embedded null characters, use the
fwrite function.
- slangrtl
-
clearerr,
close,
fclose,
fdopen,
feof,
ferror,
fflush,
fgets,
fgetslines,
fileno,
fopen,
fprintf,
fread,
fseek,
ftell,
fwrite,
isatty,
mkdir,
open,
pclose,
popen,
printf,
write
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