NAME
bgets() — read stream up to next delimiter
SYNOPSIS
#include <libgen.h>
char *bgets(
char *buffer,
size_t *count,
FILE *stream,
const char *breakstring
);
DESCRIPTION
bgets
reads characters from
stream
into
buffer
until either
count
is exhausted or one of the characters in
breakstring
is encountered in the stream.
The read data is terminated with a null byte
(\0)
and a pointer to the trailing null is returned.
If a
breakstring
character is encountered, the last nonnull
is the delimiter character that terminated the scan.
Note that, except for the fact that the returned value points to the
end
of the read string rather than to the beginning, the call
bgets(buffer, sizeof buffer, stream, \n);
is identical to
fgets(buffer, sizeof buffer, stream);
There is always enough room reserved in the buffer for the trailing
null.
If
breakstring
is a null pointer, the value of
breakstring
from the previous call is used.
If
breakstring
is null at the first call, no characters will be
used to delimit the string.
To use this interface, link in the libgen library by specifying
-lgen.
For example:
RETURN VALUE
NULL
is returned on error or end-of-file.
Reporting the condition is delayed to the next
call if any characters were read but not yet returned.
EXAMPLES
#include <libgen.h>
char buffer[8];
/* read in first user name from /etc/passwd */
fp = fopen("/etc/passwd","r");
bgets(buffer, 8, fp, ":");
Printable version
