#include "libserialport.h"
#include "libserialport_internal.h"
-enum sp_return get_port_details(struct sp_port *port)
+SP_PRIV enum sp_return get_port_details(struct sp_port *port)
{
/* Description limited to 127 char,
anything longer would not be user friendly anyway */
int i, count;
if (strncmp(port->name, "/dev/", 5))
- RETURN_ERROR(SP_ERR_ARG, "Device name not recognized (%s)", port->name);
+ RETURN_ERROR(SP_ERR_ARG, "Device name not recognized.");
snprintf(file_name, sizeof(file_name), "/sys/class/tty/%s", dev);
count = readlink(file_name, file_name, sizeof(file_name));
if (count <= 0 || count >= (int) sizeof(file_name)-1)
- RETURN_ERROR(SP_ERR_ARG, "Device not found (%s)", port->name);
+ RETURN_ERROR(SP_ERR_ARG, "Device not found.");
file_name[count] = 0;
if (strstr(file_name, "bluetooth"))
port->transport = SP_TRANSPORT_BLUETOOTH;
RETURN_OK();
}
+
+SP_PRIV enum sp_return list_ports(struct sp_port ***list)
+{
+ char name[PATH_MAX], target[PATH_MAX];
+ struct dirent entry, *result;
+#ifdef HAVE_SERIAL_STRUCT
+ struct serial_struct serial_info;
+ int ioctl_result;
+#endif
+#ifndef HAVE_READLINKAT
+ char buf[sizeof(entry.d_name) + 16];
+#endif
+ int len, fd;
+ DIR *dir;
+ int ret = SP_OK;
+
+ DEBUG("Enumerating tty devices");
+ if (!(dir = opendir("/sys/class/tty")))
+ RETURN_FAIL("could not open /sys/class/tty");
+
+ DEBUG("Iterating over results");
+ while (!readdir_r(dir, &entry, &result) && result) {
+#ifdef HAVE_READLINKAT
+ len = readlinkat(dirfd(dir), entry.d_name, target, sizeof(target));
+#else
+ snprintf(buf, sizeof(buf), "/sys/class/tty/%s", entry.d_name);
+ len = readlink(buf, target, sizeof(target));
+#endif
+ if (len <= 0 || len >= (int) sizeof(target)-1)
+ continue;
+ target[len] = 0;
+ if (strstr(target, "virtual"))
+ continue;
+ snprintf(name, sizeof(name), "/dev/%s", entry.d_name);
+ DEBUG_FMT("Found device %s", name);
+ if (strstr(target, "serial8250")) {
+ /* The serial8250 driver has a hardcoded number of ports.
+ * The only way to tell which actually exist on a given system
+ * is to try to open them and make an ioctl call. */
+ DEBUG("serial8250 device, attempting to open");
+ if ((fd = open(name, O_RDWR | O_NONBLOCK | O_NOCTTY)) < 0) {
+ DEBUG("open failed, skipping");
+ continue;
+ }
+#ifdef HAVE_SERIAL_STRUCT
+ ioctl_result = ioctl(fd, TIOCGSERIAL, &serial_info);
+#endif
+ close(fd);
+#ifdef HAVE_SERIAL_STRUCT
+ if (ioctl_result != 0) {
+ DEBUG("ioctl failed, skipping");
+ continue;
+ }
+ if (serial_info.type == PORT_UNKNOWN) {
+ DEBUG("port type is unknown, skipping");
+ continue;
+ }
+#endif
+ }
+ DEBUG_FMT("Found port %s", name);
+ *list = list_append(*list, name);
+ if (!list) {
+ SET_ERROR(ret, SP_ERR_MEM, "list append failed");
+ break;
+ }
+ }
+ closedir(dir);
+
+ return ret;
+}