HP-UX Reference (11i v1 00/12) - 3 Library Functions A-M (vol 6)

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bgets(3G) bgets(3G)

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 non-null 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.

RETURN VALUE

NULL is returned on error or end-of-ﬁle. Reporting the condition is delayed to the next call if any charac-

ters were read but not yet returned.

APPLICATION USAGE

bgets is thread-safe. It is not async-cancel-safe. A cancellation point may occur when a thread is execut-

ing bgets.

EXAMPLES

#include <libgen.h>

char buffer[8];

/* read in first user name from /etc/passwd */

fp = fopen("/etc/passwd","r");

bgets(buffer, 8, fp, ":");