diff --git a/tools/iio/generic_buffer.c b/tools/iio/generic_buffer.c
index 9535c2dc25af6..32f389ebb94da 100644
--- a/tools/iio/generic_buffer.c
+++ b/tools/iio/generic_buffer.c
@@ -193,15 +193,15 @@ void process_scan(char *data,
void print_usage(void)
{
- printf("Usage: generic_buffer [options]...\n"
- "Capture, convert and output data from IIO device buffer\n"
- " -c <n> Do n conversions\n"
- " -e Disable wait for event (new data)\n"
- " -g Use trigger-less mode\n"
- " -l <n> Set buffer length to n samples\n"
- " -n <name> Set device name (mandatory)\n"
- " -t <name> Set trigger name\n"
- " -w <n> Set delay between reads in us (event-less mode)\n");
+ fprintf(stderr, "Usage: generic_buffer [options]...\n"
+ "Capture, convert and output data from IIO device buffer\n"
+ " -c <n> Do n conversions\n"
+ " -e Disable wait for event (new data)\n"
+ " -g Use trigger-less mode\n"
+ " -l <n> Set buffer length to n samples\n"
+ " -n <name> Set device name (mandatory)\n"
+ " -t <name> Set trigger name\n"
+ " -w <n> Set delay between reads in us (event-less mode)\n");
}
int main(int argc, char **argv)
@@ -271,7 +271,7 @@ int main(int argc, char **argv)
}
if (!device_name) {
- printf("Device name not set\n");
+ fprintf(stderr, "Device name not set\n");
print_usage();
return -1;
}
@@ -279,7 +279,7 @@ int main(int argc, char **argv)
/* Find the device requested */
dev_num = find_type_by_name(device_name, "iio:device");
if (dev_num < 0) {
- printf("Failed to find the %s\n", device_name);
+ fprintf(stderr, "Failed to find the %s\n", device_name);
return dev_num;
}
@@ -307,7 +307,8 @@ int main(int argc, char **argv)
/* Verify the trigger exists */
trig_num = find_type_by_name(trigger_name, "trigger");
if (trig_num < 0) {
- printf("Failed to find the trigger %s\n", trigger_name);
+ fprintf(stderr, "Failed to find the trigger %s\n",
+ trigger_name);
ret = trig_num;
goto error_free_triggername;
}
@@ -323,8 +324,8 @@ int main(int argc, char **argv)
*/
ret = build_channel_array(dev_dir_name, &channels, &num_channels);
if (ret) {
- printf("Problem reading scan element information\n");
- printf("diag %s\n", dev_dir_name);
+ fprintf(stderr, "Problem reading scan element information\n"
+ "diag %s\n", dev_dir_name);
goto error_free_triggername;
}
@@ -350,7 +351,8 @@ int main(int argc, char **argv)
dev_dir_name,
trigger_name);
if (ret < 0) {
- printf("Failed to write current_trigger file\n");
+ fprintf(stderr,
+ "Failed to write current_trigger file\n");
goto error_free_buf_dir_name;
}
}
@@ -382,7 +384,7 @@ int main(int argc, char **argv)
fp = open(buffer_access, O_RDONLY | O_NONBLOCK);
if (fp == -1) { /* TODO: If it isn't there make the node */
ret = -errno;
- printf("Failed to open %s\n", buffer_access);
+ fprintf(stderr, "Failed to open %s\n", buffer_access);
goto error_free_buffer_access;
}
@@ -410,7 +412,7 @@ int main(int argc, char **argv)
read_size = read(fp, data, toread * scan_size);
if (read_size < 0) {
if (errno == EAGAIN) {
- printf("nothing available\n");
+ fprintf(stderr, "nothing available\n");
continue;
} else {
break;
@@ -431,7 +433,8 @@ int main(int argc, char **argv)
ret = write_sysfs_string("trigger/current_trigger",
dev_dir_name, "NULL");
if (ret < 0)
- printf("Failed to write to %s\n", dev_dir_name);
+ fprintf(stderr, "Failed to write to %s\n",
+ dev_dir_name);
error_close_buffer_access:
if (close(fp) == -1)
diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c
index 9ee195949a4a5..cd3fd41b481dc 100644
--- a/tools/iio/iio_event_monitor.c
+++ b/tools/iio/iio_event_monitor.c
@@ -215,8 +215,8 @@ static void print_event(struct iio_event_data *event)
bool diff = IIO_EVENT_CODE_EXTRACT_DIFF(event->id);
if (!event_is_known(event)) {
- printf("Unknown event: time: %lld, id: %llx\n",
- event->timestamp, event->id);
+ fprintf(stderr, "Unknown event: time: %lld, id: %llx\n",
+ event->timestamp, event->id);
return;
}
@@ -251,7 +251,7 @@ int main(int argc, char **argv)
int fd, event_fd;
if (argc <= 1) {
- printf("Usage: %s <device_name>\n", argv[0]);
+ fprintf(stderr, "Usage: %s <device_name>\n", argv[0]);
return -1;
}
@@ -277,14 +277,14 @@ int main(int argc, char **argv)
fd = open(chrdev_name, 0);
if (fd == -1) {
ret = -errno;
- fprintf(stdout, "Failed to open %s\n", chrdev_name);
+ fprintf(stderr, "Failed to open %s\n", chrdev_name);
goto error_free_chrdev_name;
}
ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd);
if (ret == -1 || event_fd == -1) {
ret = -errno;
- fprintf(stdout, "Failed to retrieve event fd\n");
+ fprintf(stderr, "Failed to retrieve event fd\n");
if (close(fd) == -1)
perror("Failed to close character device file");
@@ -300,7 +300,7 @@ int main(int argc, char **argv)
ret = read(event_fd, &event, sizeof(event));
if (ret == -1) {
if (errno == EAGAIN) {
- printf("nothing available\n");
+ fprintf(stderr, "nothing available\n");
continue;
} else {
ret = -errno;
@@ -310,7 +310,7 @@ int main(int argc, char **argv)
}
if (ret != sizeof(event)) {
- printf("Reading event failed!\n");
+ fprintf(stderr, "Reading event failed!\n");
ret = -EIO;
break;
}
diff --git a/tools/iio/iio_utils.c b/tools/iio/iio_utils.c
index e177f4022d400..c3f9e37333e73 100644
--- a/tools/iio/iio_utils.c
+++ b/tools/iio/iio_utils.c
@@ -140,7 +140,8 @@ int iioutils_get_type(unsigned *is_signed, unsigned *bytes, unsigned *bits_used,
sysfsfp = fopen(filename, "r");
if (!sysfsfp) {
ret = -errno;
- printf("failed to open %s\n", filename);
+ fprintf(stderr, "failed to open %s\n",
+ filename);
goto error_free_filename;
}
@@ -152,11 +153,13 @@ int iioutils_get_type(unsigned *is_signed, unsigned *bytes, unsigned *bits_used,
&padint, shift);
if (ret < 0) {
ret = -errno;
- printf("failed to pass scan type description\n");
+ fprintf(stderr,
+ "failed to pass scan type description\n");
goto error_close_sysfsfp;
} else if (ret != 5) {
ret = -EIO;
- printf("scan type description didn't match\n");
+ fprintf(stderr,
+ "scan type description didn't match\n");
goto error_close_sysfsfp;
}
@@ -170,7 +173,8 @@ int iioutils_get_type(unsigned *is_signed, unsigned *bytes, unsigned *bits_used,
*is_signed = (signchar == 's');
if (fclose(sysfsfp)) {
ret = -errno;
- printf("Failed to close %s\n", filename);
+ fprintf(stderr, "Failed to close %s\n",
+ filename);
goto error_free_filename;
}
@@ -454,7 +458,8 @@ int build_channel_array(const char *device_dir,
sysfsfp = fopen(filename, "r");
if (!sysfsfp) {
ret = -errno;
- printf("failed to open %s\n", filename);
+ fprintf(stderr, "failed to open %s\n",
+ filename);
free(filename);
goto error_cleanup_array;
}
@@ -568,7 +573,7 @@ int find_type_by_name(const char *name, const char *type)
dp = opendir(iio_dir);
if (!dp) {
- printf("No industrialio devices available\n");
+ fprintf(stderr, "No industrialio devices available\n");
return -ENODEV;
}
@@ -581,11 +586,13 @@ int find_type_by_name(const char *name, const char *type)
ret = sscanf(ent->d_name + strlen(type), "%d", &number);
if (ret < 0) {
ret = -errno;
- printf("failed to read element number\n");
+ fprintf(stderr,
+ "failed to read element number\n");
goto error_close_dir;
} else if (ret != 1) {
ret = -EIO;
- printf("failed to match element number\n");
+ fprintf(stderr,
+ "failed to match element number\n");
goto error_close_dir;
}
@@ -664,7 +671,7 @@ static int _write_sysfs_int(const char *filename, const char *basedir, int val,
sysfsfp = fopen(temp, "w");
if (!sysfsfp) {
ret = -errno;
- printf("failed to open %s\n", temp);
+ fprintf(stderr, "failed to open %s\n", temp);
goto error_free;
}
@@ -685,7 +692,7 @@ static int _write_sysfs_int(const char *filename, const char *basedir, int val,
sysfsfp = fopen(temp, "r");
if (!sysfsfp) {
ret = -errno;
- printf("failed to open %s\n", temp);
+ fprintf(stderr, "failed to open %s\n", temp);
goto error_free;
}
@@ -703,8 +710,9 @@ static int _write_sysfs_int(const char *filename, const char *basedir, int val,
}
if (test != val) {
- printf("Possible failure in int write %d to %s/%s\n",
- val, basedir, filename);
+ fprintf(stderr,
+ "Possible failure in int write %d to %s/%s\n",
+ val, basedir, filename);
ret = -1;
}
}
@@ -750,7 +758,7 @@ static int _write_sysfs_string(const char *filename, const char *basedir,
char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
if (!temp) {
- printf("Memory allocation failed\n");
+ fprintf(stderr, "Memory allocation failed\n");
return -ENOMEM;
}
@@ -761,7 +769,7 @@ static int _write_sysfs_string(const char *filename, const char *basedir,
sysfsfp = fopen(temp, "w");
if (!sysfsfp) {
ret = -errno;
- printf("Could not open %s\n", temp);
+ fprintf(stderr, "Could not open %s\n", temp);
goto error_free;
}
@@ -782,7 +790,7 @@ static int _write_sysfs_string(const char *filename, const char *basedir,
sysfsfp = fopen(temp, "r");
if (!sysfsfp) {
ret = -errno;
- printf("Could not open file to verify\n");
+ fprintf(stderr, "Could not open file to verify\n");
goto error_free;
}
@@ -800,9 +808,10 @@ static int _write_sysfs_string(const char *filename, const char *basedir,
}
if (strcmp(temp, val) != 0) {
- printf("Possible failure in string write of %s "
- "Should be %s written to %s/%s\n", temp, val,
- basedir, filename);
+ fprintf(stderr,
+ "Possible failure in string write of %s "
+ "Should be %s written to %s/%s\n", temp, val,
+ basedir, filename);
ret = -1;
}
}
@@ -856,7 +865,7 @@ int read_sysfs_posint(const char *filename, const char *basedir)
char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
if (!temp) {
- printf("Memory allocation failed");
+ fprintf(stderr, "Memory allocation failed");
return -ENOMEM;
}
@@ -903,7 +912,7 @@ int read_sysfs_float(const char *filename, const char *basedir, float *val)
char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
if (!temp) {
- printf("Memory allocation failed");
+ fprintf(stderr, "Memory allocation failed");
return -ENOMEM;
}
@@ -950,7 +959,7 @@ int read_sysfs_string(const char *filename, const char *basedir, char *str)
char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
if (!temp) {
- printf("Memory allocation failed");
+ fprintf(stderr, "Memory allocation failed");
return -ENOMEM;
}
diff --git a/tools/iio/lsiio.c b/tools/iio/lsiio.c
index 4f8172fe78815..b271a9a796d21 100644
--- a/tools/iio/lsiio.c
+++ b/tools/iio/lsiio.c
@@ -108,7 +108,7 @@ static int dump_devices(void)
dp = opendir(iio_dir);
if (!dp) {
- printf("No industrial I/O devices available\n");
+ fprintf(stderr, "No industrial I/O devices available\n");
return -ENODEV;
}