* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+/* ** NOTE ** All API documentation is in the manual page.
+ *
+ * To read the manual page from the source directory, do:
+ * man ./miniexpect.3
+ * If you have installed miniexpect, do:
+ * man 3 miniexpect
+ *
+ * The source for the manual page is miniexpect.pod.
+ */
+
#ifndef MINIEXPECT_H_
#define MINIEXPECT_H_
/* This handle is created per subprocess that is spawned. */
struct mexp_h {
- int fd; /* File descriptor pointing to pty. */
- pid_t pid; /* Subprocess PID. */
-
- /* Timeout (milliseconds, 1/1000th seconds). The caller may set
- * this before calling mexp_expect. Set it to -1 to mean no
- * timeout. The default is 60000 (= 60 seconds).
- */
+ int fd;
+ pid_t pid;
int timeout;
-
- /* The read buffer is allocated by the library when mexp_expect is
- * called. It is available so you can examine the buffer to see
- * what part of the regexp matched. Note this buffer does not
- * contain the full input from the process, but it will contain at
- * least the part matched by the regular expression (and maybe some
- * more).
- */
- char *buffer; /* Read buffer. */
- size_t len; /* Length of data in the buffer. */
- size_t alloc; /* Allocated size of the buffer. */
-
- /* The caller may set this to set the size (in bytes) for reads from
- * the subprocess. The default is 1024.
- */
+ char *buffer;
+ size_t len;
+ size_t alloc;
+ ssize_t next_match;
size_t read_size;
-
- /* Opaque pointers for use of the caller. The library will not
- * touch these.
- */
+ int pcre_error;
void *user1;
void *user2;
void *user3;
};
typedef struct mexp_h mexp_h;
-/* Spawn a subprocess.
- *
- * If successful it returns a handle. If it fails, it returns NULL
- * and sets errno.
- */
+/* Spawn a subprocess. */
extern mexp_h *mexp_spawnv (const char *file, char **argv);
-
-/* Same as mexp_spawnv, but it uses a NULL-terminated variable length
- * list of arguments.
- */
extern mexp_h *mexp_spawnl (const char *file, const char *arg, ...);
-/* Close the handle and clean up the subprocess.
- *
- * This returns:
- * 0: successful close, subprocess exited cleanly.
- * -1: error in system call, see errno.
- * > 0: exit status of subprocess if it didn't exit cleanly. Use
- * WIFEXITED, WEXITSTATUS, WIFSIGNALED, WTERMSIG etc macros to
- * examine this.
- *
- * Notes:
- *
- * - Even in the error cases, the handle is always closed and
- * freed by this call.
- *
- * - It is normal for the kernel to send SIGHUP to the subprocess.
- * If the subprocess doesn't catch the SIGHUP, then it will die
- * (WIFSIGNALED (status) && WTERMSIG (status) == SIGHUP). This
- * case should not necessarily be considered an error.
- */
+/* Close the handle. */
extern int mexp_close (mexp_h *h);
+/* Expect. */
+struct mexp_regexp {
+ int r;
+ const pcre *re;
+ const pcre_extra *extra;
+ int options;
+};
+typedef struct mexp_regexp mexp_regexp;
+
enum mexp_status {
- MEXP_EOF = 0,
- MEXP_ERROR = 1,
- MEXP_TIMEOUT = 2,
- MEXP_MATCHED = 3,
- MEXP_PCRE_ERROR = 4,
+ MEXP_EOF = 0,
+ MEXP_ERROR = -1,
+ MEXP_PCRE_ERROR = -2,
+ MEXP_TIMEOUT = -3,
};
-/* Expect some output from the subprocess. Match the output against
- * the PCRE regular expression.
- *
- * 'code', 'extra', 'options', 'ovector' and 'ovecsize' are passed
- * through to the pcre_exec function. See pcreapi(3).
- *
- * If you want to match multiple strings, you have to combine them
- * into a single regexp, eg. "([Pp]assword)|([Ll]ogin)|([Ff]ailed)".
- * Then examine ovector[2], ovector[4], ovector[6] to see if they
- * contain '>= 0' or '-1'. See the pcreapi(3) man page for further
- * information.
- *
- * 'code' may be NULL, which means we don't match against a regular
- * expression. This is useful if you just want to wait for EOF or
- * timeout.
- *
- * This can return:
- *
- * MEXP_MATCHED:
- * The input matched the regular expression. Use ovector
- * to find out what matched in the buffer (mexp_h->buffer).
- * MEXP_TIMEOUT:
- * No input matched before the timeout (mexp_h->timeout) was reached.
- * MEXP_EOF:
- * The subprocess closed the connection.
- * MEXP_ERROR:
- * There was a system call error (eg. from the read call). See errno.
- * MEXP_PCRE_ERROR
- * There was a pcre_exec error. *pcre_ret is set to the error code
- * (see pcreapi(3) for a list of PCRE_* error codes and what they mean).
- */
-extern enum mexp_status mexp_expect (mexp_h *h, const pcre *code,
- const pcre_extra *extra,
- int options, int *ovector, int ovecsize,
- int *pcre_ret);
+extern int mexp_expect (mexp_h *h, const mexp_regexp *regexps,
+ int *ovector, int ovecsize);
-/* This is a convenience function for writing something (eg. a
- * password or command) to the subprocess. You could do this by
- * writing directly to 'h->fd', but this function does all the error
- * checking for you.
- *
- * Returns the number of bytes if the whole message was written OK
- * (partial writes are not possible with this function), or -1 if
- * there was an error (check errno).
- */
extern int mexp_printf (mexp_h *h, const char *fs, ...)
__attribute__((format(printf,2,3)));