Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 1 | /* Industrialio event test code. |
| 2 | * |
| 3 | * Copyright (c) 2011-2012 Lars-Peter Clausen <lars@metafoo.de> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 as published by |
| 7 | * the Free Software Foundation. |
| 8 | * |
| 9 | * This program is primarily intended as an example application. |
| 10 | * Reads the current buffer setup from sysfs and starts a short capture |
| 11 | * from the specified device, pretty printing the result after appropriate |
| 12 | * conversion. |
| 13 | * |
| 14 | * Usage: |
| 15 | * iio_event_monitor <device_name> |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 16 | */ |
| 17 | |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 18 | #include <unistd.h> |
Roberta Dobrescu | bdcb31d | 2015-02-26 10:49:24 +0200 | [diff] [blame] | 19 | #include <stdlib.h> |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 20 | #include <stdbool.h> |
| 21 | #include <stdio.h> |
| 22 | #include <errno.h> |
| 23 | #include <string.h> |
| 24 | #include <poll.h> |
| 25 | #include <fcntl.h> |
| 26 | #include <sys/ioctl.h> |
| 27 | #include "iio_utils.h" |
Jonathan Cameron | 06458e2 | 2012-04-25 15:54:58 +0100 | [diff] [blame] | 28 | #include <linux/iio/events.h> |
Roberta Dobrescu | 9576385 | 2015-02-26 10:49:23 +0200 | [diff] [blame] | 29 | #include <linux/iio/types.h> |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 30 | |
| 31 | static const char * const iio_chan_type_name_spec[] = { |
| 32 | [IIO_VOLTAGE] = "voltage", |
| 33 | [IIO_CURRENT] = "current", |
| 34 | [IIO_POWER] = "power", |
| 35 | [IIO_ACCEL] = "accel", |
| 36 | [IIO_ANGL_VEL] = "anglvel", |
| 37 | [IIO_MAGN] = "magn", |
| 38 | [IIO_LIGHT] = "illuminance", |
| 39 | [IIO_INTENSITY] = "intensity", |
| 40 | [IIO_PROXIMITY] = "proximity", |
| 41 | [IIO_TEMP] = "temp", |
| 42 | [IIO_INCLI] = "incli", |
| 43 | [IIO_ROT] = "rot", |
| 44 | [IIO_ANGL] = "angl", |
| 45 | [IIO_TIMESTAMP] = "timestamp", |
| 46 | [IIO_CAPACITANCE] = "capacitance", |
Peter Meerwald | a216014 | 2012-06-15 19:25:26 +0200 | [diff] [blame] | 47 | [IIO_ALTVOLTAGE] = "altvoltage", |
Peter Meerwald | 0378250 | 2014-12-06 06:00:00 +0000 | [diff] [blame] | 48 | [IIO_CCT] = "cct", |
| 49 | [IIO_PRESSURE] = "pressure", |
| 50 | [IIO_HUMIDITYRELATIVE] = "humidityrelative", |
Daniel Baluta | 282a566 | 2014-11-10 14:45:35 +0200 | [diff] [blame] | 51 | [IIO_ACTIVITY] = "activity", |
| 52 | [IIO_STEPS] = "steps", |
Peter Meerwald | 30e8326 | 2015-06-20 23:52:31 +0200 | [diff] [blame] | 53 | [IIO_ENERGY] = "energy", |
| 54 | [IIO_DISTANCE] = "distance", |
| 55 | [IIO_VELOCITY] = "velocity", |
Peter Meerwald-Stadler | 6ad515c | 2016-03-15 22:54:51 +0100 | [diff] [blame] | 56 | [IIO_CONCENTRATION] = "concentration", |
| 57 | [IIO_RESISTANCE] = "resistance", |
| 58 | [IIO_PH] = "ph", |
Peter Meerwald-Stadler | d409404 | 2016-03-20 16:20:23 +0100 | [diff] [blame^] | 59 | [IIO_UVINDEX] = "uvindex", |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 60 | }; |
| 61 | |
| 62 | static const char * const iio_ev_type_text[] = { |
| 63 | [IIO_EV_TYPE_THRESH] = "thresh", |
| 64 | [IIO_EV_TYPE_MAG] = "mag", |
| 65 | [IIO_EV_TYPE_ROC] = "roc", |
| 66 | [IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive", |
| 67 | [IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive", |
Irina Tirdea | 27be842 | 2015-01-11 21:10:11 +0200 | [diff] [blame] | 68 | [IIO_EV_TYPE_CHANGE] = "change", |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 69 | }; |
| 70 | |
| 71 | static const char * const iio_ev_dir_text[] = { |
| 72 | [IIO_EV_DIR_EITHER] = "either", |
| 73 | [IIO_EV_DIR_RISING] = "rising", |
| 74 | [IIO_EV_DIR_FALLING] = "falling" |
| 75 | }; |
| 76 | |
| 77 | static const char * const iio_modifier_names[] = { |
| 78 | [IIO_MOD_X] = "x", |
| 79 | [IIO_MOD_Y] = "y", |
| 80 | [IIO_MOD_Z] = "z", |
Roberta Dobrescu | 0a6e217 | 2014-10-22 16:50:17 +0300 | [diff] [blame] | 81 | [IIO_MOD_X_AND_Y] = "x&y", |
| 82 | [IIO_MOD_X_AND_Z] = "x&z", |
| 83 | [IIO_MOD_Y_AND_Z] = "y&z", |
| 84 | [IIO_MOD_X_AND_Y_AND_Z] = "x&y&z", |
| 85 | [IIO_MOD_X_OR_Y] = "x|y", |
| 86 | [IIO_MOD_X_OR_Z] = "x|z", |
| 87 | [IIO_MOD_Y_OR_Z] = "y|z", |
| 88 | [IIO_MOD_X_OR_Y_OR_Z] = "x|y|z", |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 89 | [IIO_MOD_LIGHT_BOTH] = "both", |
| 90 | [IIO_MOD_LIGHT_IR] = "ir", |
Peter Meerwald | da4db94 | 2012-07-01 12:20:13 +0200 | [diff] [blame] | 91 | [IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)", |
| 92 | [IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2", |
| 93 | [IIO_MOD_LIGHT_CLEAR] = "clear", |
| 94 | [IIO_MOD_LIGHT_RED] = "red", |
| 95 | [IIO_MOD_LIGHT_GREEN] = "green", |
| 96 | [IIO_MOD_LIGHT_BLUE] = "blue", |
Peter Meerwald-Stadler | 2c5ff1f | 2016-03-20 16:20:22 +0100 | [diff] [blame] | 97 | [IIO_MOD_LIGHT_UV] = "uv", |
Roberta Dobrescu | 0a6e217 | 2014-10-22 16:50:17 +0300 | [diff] [blame] | 98 | [IIO_MOD_QUATERNION] = "quaternion", |
| 99 | [IIO_MOD_TEMP_AMBIENT] = "ambient", |
| 100 | [IIO_MOD_TEMP_OBJECT] = "object", |
| 101 | [IIO_MOD_NORTH_MAGN] = "from_north_magnetic", |
| 102 | [IIO_MOD_NORTH_TRUE] = "from_north_true", |
| 103 | [IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp", |
| 104 | [IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp", |
Daniel Baluta | 282a566 | 2014-11-10 14:45:35 +0200 | [diff] [blame] | 105 | [IIO_MOD_RUNNING] = "running", |
| 106 | [IIO_MOD_JOGGING] = "jogging", |
| 107 | [IIO_MOD_WALKING] = "walking", |
| 108 | [IIO_MOD_STILL] = "still", |
Peter Meerwald | 30e8326 | 2015-06-20 23:52:31 +0200 | [diff] [blame] | 109 | [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)", |
Peter Meerwald-Stadler | 6ad515c | 2016-03-15 22:54:51 +0100 | [diff] [blame] | 110 | [IIO_MOD_I] = "i", |
| 111 | [IIO_MOD_Q] = "q", |
| 112 | [IIO_MOD_CO2] = "co2", |
| 113 | [IIO_MOD_VOC] = "voc", |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 114 | }; |
| 115 | |
| 116 | static bool event_is_known(struct iio_event_data *event) |
| 117 | { |
| 118 | enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id); |
| 119 | enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id); |
| 120 | enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id); |
| 121 | enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id); |
| 122 | |
| 123 | switch (type) { |
| 124 | case IIO_VOLTAGE: |
| 125 | case IIO_CURRENT: |
| 126 | case IIO_POWER: |
| 127 | case IIO_ACCEL: |
| 128 | case IIO_ANGL_VEL: |
| 129 | case IIO_MAGN: |
| 130 | case IIO_LIGHT: |
| 131 | case IIO_INTENSITY: |
| 132 | case IIO_PROXIMITY: |
| 133 | case IIO_TEMP: |
| 134 | case IIO_INCLI: |
| 135 | case IIO_ROT: |
| 136 | case IIO_ANGL: |
| 137 | case IIO_TIMESTAMP: |
| 138 | case IIO_CAPACITANCE: |
Peter Meerwald | a216014 | 2012-06-15 19:25:26 +0200 | [diff] [blame] | 139 | case IIO_ALTVOLTAGE: |
Peter Meerwald | 0378250 | 2014-12-06 06:00:00 +0000 | [diff] [blame] | 140 | case IIO_CCT: |
| 141 | case IIO_PRESSURE: |
| 142 | case IIO_HUMIDITYRELATIVE: |
Daniel Baluta | 282a566 | 2014-11-10 14:45:35 +0200 | [diff] [blame] | 143 | case IIO_ACTIVITY: |
| 144 | case IIO_STEPS: |
Peter Meerwald | 30e8326 | 2015-06-20 23:52:31 +0200 | [diff] [blame] | 145 | case IIO_ENERGY: |
| 146 | case IIO_DISTANCE: |
| 147 | case IIO_VELOCITY: |
Peter Meerwald-Stadler | 6ad515c | 2016-03-15 22:54:51 +0100 | [diff] [blame] | 148 | case IIO_CONCENTRATION: |
| 149 | case IIO_RESISTANCE: |
| 150 | case IIO_PH: |
Peter Meerwald-Stadler | d409404 | 2016-03-20 16:20:23 +0100 | [diff] [blame^] | 151 | case IIO_UVINDEX: |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 152 | break; |
| 153 | default: |
| 154 | return false; |
| 155 | } |
| 156 | |
| 157 | switch (mod) { |
| 158 | case IIO_NO_MOD: |
| 159 | case IIO_MOD_X: |
| 160 | case IIO_MOD_Y: |
| 161 | case IIO_MOD_Z: |
Roberta Dobrescu | 0a6e217 | 2014-10-22 16:50:17 +0300 | [diff] [blame] | 162 | case IIO_MOD_X_AND_Y: |
| 163 | case IIO_MOD_X_AND_Z: |
| 164 | case IIO_MOD_Y_AND_Z: |
| 165 | case IIO_MOD_X_AND_Y_AND_Z: |
| 166 | case IIO_MOD_X_OR_Y: |
| 167 | case IIO_MOD_X_OR_Z: |
| 168 | case IIO_MOD_Y_OR_Z: |
| 169 | case IIO_MOD_X_OR_Y_OR_Z: |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 170 | case IIO_MOD_LIGHT_BOTH: |
| 171 | case IIO_MOD_LIGHT_IR: |
Peter Meerwald | da4db94 | 2012-07-01 12:20:13 +0200 | [diff] [blame] | 172 | case IIO_MOD_ROOT_SUM_SQUARED_X_Y: |
| 173 | case IIO_MOD_SUM_SQUARED_X_Y_Z: |
| 174 | case IIO_MOD_LIGHT_CLEAR: |
| 175 | case IIO_MOD_LIGHT_RED: |
| 176 | case IIO_MOD_LIGHT_GREEN: |
| 177 | case IIO_MOD_LIGHT_BLUE: |
Peter Meerwald-Stadler | 2c5ff1f | 2016-03-20 16:20:22 +0100 | [diff] [blame] | 178 | case IIO_MOD_LIGHT_UV: |
Roberta Dobrescu | 0a6e217 | 2014-10-22 16:50:17 +0300 | [diff] [blame] | 179 | case IIO_MOD_QUATERNION: |
| 180 | case IIO_MOD_TEMP_AMBIENT: |
| 181 | case IIO_MOD_TEMP_OBJECT: |
| 182 | case IIO_MOD_NORTH_MAGN: |
| 183 | case IIO_MOD_NORTH_TRUE: |
| 184 | case IIO_MOD_NORTH_MAGN_TILT_COMP: |
| 185 | case IIO_MOD_NORTH_TRUE_TILT_COMP: |
Daniel Baluta | 282a566 | 2014-11-10 14:45:35 +0200 | [diff] [blame] | 186 | case IIO_MOD_RUNNING: |
| 187 | case IIO_MOD_JOGGING: |
| 188 | case IIO_MOD_WALKING: |
| 189 | case IIO_MOD_STILL: |
Peter Meerwald | 30e8326 | 2015-06-20 23:52:31 +0200 | [diff] [blame] | 190 | case IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z: |
Peter Meerwald-Stadler | 6ad515c | 2016-03-15 22:54:51 +0100 | [diff] [blame] | 191 | case IIO_MOD_I: |
| 192 | case IIO_MOD_Q: |
| 193 | case IIO_MOD_CO2: |
| 194 | case IIO_MOD_VOC: |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 195 | break; |
| 196 | default: |
| 197 | return false; |
| 198 | } |
| 199 | |
| 200 | switch (ev_type) { |
| 201 | case IIO_EV_TYPE_THRESH: |
| 202 | case IIO_EV_TYPE_MAG: |
| 203 | case IIO_EV_TYPE_ROC: |
| 204 | case IIO_EV_TYPE_THRESH_ADAPTIVE: |
| 205 | case IIO_EV_TYPE_MAG_ADAPTIVE: |
Irina Tirdea | 27be842 | 2015-01-11 21:10:11 +0200 | [diff] [blame] | 206 | case IIO_EV_TYPE_CHANGE: |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 207 | break; |
| 208 | default: |
| 209 | return false; |
| 210 | } |
| 211 | |
| 212 | switch (dir) { |
| 213 | case IIO_EV_DIR_EITHER: |
| 214 | case IIO_EV_DIR_RISING: |
| 215 | case IIO_EV_DIR_FALLING: |
Daniel Baluta | 282a566 | 2014-11-10 14:45:35 +0200 | [diff] [blame] | 216 | case IIO_EV_DIR_NONE: |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 217 | break; |
| 218 | default: |
| 219 | return false; |
| 220 | } |
| 221 | |
| 222 | return true; |
| 223 | } |
| 224 | |
| 225 | static void print_event(struct iio_event_data *event) |
| 226 | { |
| 227 | enum iio_chan_type type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event->id); |
| 228 | enum iio_modifier mod = IIO_EVENT_CODE_EXTRACT_MODIFIER(event->id); |
| 229 | enum iio_event_type ev_type = IIO_EVENT_CODE_EXTRACT_TYPE(event->id); |
| 230 | enum iio_event_direction dir = IIO_EVENT_CODE_EXTRACT_DIR(event->id); |
| 231 | int chan = IIO_EVENT_CODE_EXTRACT_CHAN(event->id); |
| 232 | int chan2 = IIO_EVENT_CODE_EXTRACT_CHAN2(event->id); |
| 233 | bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id); |
| 234 | |
| 235 | if (!event_is_known(event)) { |
Cristina Opriceana | d9abc61 | 2015-07-17 18:43:42 +0300 | [diff] [blame] | 236 | fprintf(stderr, "Unknown event: time: %lld, id: %llx\n", |
| 237 | event->timestamp, event->id); |
Hartmut Knaack | 7663a4a | 2015-06-10 21:51:20 +0200 | [diff] [blame] | 238 | |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 239 | return; |
| 240 | } |
| 241 | |
Hartmut Knaack | 916e89e | 2015-05-31 14:40:18 +0200 | [diff] [blame] | 242 | printf("Event: time: %lld, type: %s", event->timestamp, |
| 243 | iio_chan_type_name_spec[type]); |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 244 | |
Hartmut Knaack | 916e89e | 2015-05-31 14:40:18 +0200 | [diff] [blame] | 245 | if (mod != IIO_NO_MOD) |
| 246 | printf("(%s)", iio_modifier_names[mod]); |
| 247 | |
| 248 | if (chan >= 0) { |
| 249 | printf(", channel: %d", chan); |
| 250 | if (diff && chan2 >= 0) |
| 251 | printf("-%d", chan2); |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 252 | } |
| 253 | |
Hartmut Knaack | 916e89e | 2015-05-31 14:40:18 +0200 | [diff] [blame] | 254 | printf(", evtype: %s", iio_ev_type_text[ev_type]); |
Daniel Baluta | 282a566 | 2014-11-10 14:45:35 +0200 | [diff] [blame] | 255 | |
| 256 | if (dir != IIO_EV_DIR_NONE) |
| 257 | printf(", direction: %s", iio_ev_dir_text[dir]); |
Hartmut Knaack | 7663a4a | 2015-06-10 21:51:20 +0200 | [diff] [blame] | 258 | |
Daniel Baluta | 282a566 | 2014-11-10 14:45:35 +0200 | [diff] [blame] | 259 | printf("\n"); |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 260 | } |
| 261 | |
| 262 | int main(int argc, char **argv) |
| 263 | { |
| 264 | struct iio_event_data event; |
| 265 | const char *device_name; |
| 266 | char *chrdev_name; |
| 267 | int ret; |
| 268 | int dev_num; |
| 269 | int fd, event_fd; |
| 270 | |
| 271 | if (argc <= 1) { |
Cristina Opriceana | d9abc61 | 2015-07-17 18:43:42 +0300 | [diff] [blame] | 272 | fprintf(stderr, "Usage: %s <device_name>\n", argv[0]); |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 273 | return -1; |
| 274 | } |
| 275 | |
| 276 | device_name = argv[1]; |
| 277 | |
| 278 | dev_num = find_type_by_name(device_name, "iio:device"); |
| 279 | if (dev_num >= 0) { |
| 280 | printf("Found IIO device with name %s with device number %d\n", |
Hartmut Knaack | 7663a4a | 2015-06-10 21:51:20 +0200 | [diff] [blame] | 281 | device_name, dev_num); |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 282 | ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num); |
Cristina Opriceana | 37d38e2 | 2015-07-13 16:17:47 +0300 | [diff] [blame] | 283 | if (ret < 0) |
Hartmut Knaack | 0e79987 | 2015-05-31 14:40:17 +0200 | [diff] [blame] | 284 | return -ENOMEM; |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 285 | } else { |
Hartmut Knaack | 7663a4a | 2015-06-10 21:51:20 +0200 | [diff] [blame] | 286 | /* |
| 287 | * If we can't find an IIO device by name assume device_name is |
| 288 | * an IIO chrdev |
| 289 | */ |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 290 | chrdev_name = strdup(device_name); |
Hartmut Knaack | e9e45b4 | 2015-05-31 14:40:02 +0200 | [diff] [blame] | 291 | if (!chrdev_name) |
| 292 | return -ENOMEM; |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 293 | } |
| 294 | |
| 295 | fd = open(chrdev_name, 0); |
| 296 | if (fd == -1) { |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 297 | ret = -errno; |
Cristina Opriceana | d9abc61 | 2015-07-17 18:43:42 +0300 | [diff] [blame] | 298 | fprintf(stderr, "Failed to open %s\n", chrdev_name); |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 299 | goto error_free_chrdev_name; |
| 300 | } |
| 301 | |
| 302 | ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd); |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 303 | if (ret == -1 || event_fd == -1) { |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 304 | ret = -errno; |
Linus Walleij | 672f93b | 2015-08-11 14:34:38 +0200 | [diff] [blame] | 305 | if (ret == -ENODEV) |
| 306 | fprintf(stderr, |
| 307 | "This device does not support events\n"); |
| 308 | else |
| 309 | fprintf(stderr, "Failed to retrieve event fd\n"); |
Hartmut Knaack | 5fdb8c6 | 2015-05-31 14:39:49 +0200 | [diff] [blame] | 310 | if (close(fd) == -1) |
| 311 | perror("Failed to close character device file"); |
| 312 | |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 313 | goto error_free_chrdev_name; |
| 314 | } |
| 315 | |
Hartmut Knaack | 963f54c | 2015-05-31 14:40:05 +0200 | [diff] [blame] | 316 | if (close(fd) == -1) { |
| 317 | ret = -errno; |
| 318 | goto error_free_chrdev_name; |
| 319 | } |
Hartmut Knaack | 5fdb8c6 | 2015-05-31 14:39:49 +0200 | [diff] [blame] | 320 | |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 321 | while (true) { |
| 322 | ret = read(event_fd, &event, sizeof(event)); |
| 323 | if (ret == -1) { |
| 324 | if (errno == EAGAIN) { |
Cristina Opriceana | d9abc61 | 2015-07-17 18:43:42 +0300 | [diff] [blame] | 325 | fprintf(stderr, "nothing available\n"); |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 326 | continue; |
| 327 | } else { |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 328 | ret = -errno; |
Hartmut Knaack | 2b6a6e6 | 2015-05-31 14:39:48 +0200 | [diff] [blame] | 329 | perror("Failed to read event from device"); |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 330 | break; |
| 331 | } |
| 332 | } |
| 333 | |
Hartmut Knaack | 09a33f0 | 2015-06-10 21:51:19 +0200 | [diff] [blame] | 334 | if (ret != sizeof(event)) { |
Cristina Opriceana | d9abc61 | 2015-07-17 18:43:42 +0300 | [diff] [blame] | 335 | fprintf(stderr, "Reading event failed!\n"); |
Hartmut Knaack | 09a33f0 | 2015-06-10 21:51:19 +0200 | [diff] [blame] | 336 | ret = -EIO; |
| 337 | break; |
| 338 | } |
| 339 | |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 340 | print_event(&event); |
| 341 | } |
| 342 | |
Hartmut Knaack | 963f54c | 2015-05-31 14:40:05 +0200 | [diff] [blame] | 343 | if (close(event_fd) == -1) |
| 344 | perror("Failed to close event file"); |
| 345 | |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 346 | error_free_chrdev_name: |
| 347 | free(chrdev_name); |
Hartmut Knaack | 0e79987 | 2015-05-31 14:40:17 +0200 | [diff] [blame] | 348 | |
Lars-Peter Clausen | 7042122 | 2012-02-13 10:25:34 +0100 | [diff] [blame] | 349 | return ret; |
| 350 | } |