From e5fd91f1ef340da553f7a79da9540c3db711c937 Mon Sep 17 00:00:00 2001 From: AndrĂ© Fabian Silva Delgado Date: Tue, 8 Sep 2015 01:01:14 -0300 Subject: Linux-libre 4.2-gnu --- tools/iio/Makefile | 4 +- tools/iio/generic_buffer.c | 200 ++++++++++++------ tools/iio/iio_event_monitor.c | 50 ++--- tools/iio/iio_utils.c | 469 ++++++++++++++++++++++++++++++++++-------- tools/iio/iio_utils.h | 20 +- tools/iio/lsiio.c | 63 ++++-- 6 files changed, 605 insertions(+), 201 deletions(-) (limited to 'tools/iio') diff --git a/tools/iio/Makefile b/tools/iio/Makefile index bf7ae6d66..3a7a54f59 100644 --- a/tools/iio/Makefile +++ b/tools/iio/Makefile @@ -1,5 +1,5 @@ -CC = gcc -CFLAGS = -Wall -g -D_GNU_SOURCE +CC = $(CROSS_COMPILE)gcc +CFLAGS += -Wall -g -D_GNU_SOURCE all: iio_event_monitor lsiio generic_buffer diff --git a/tools/iio/generic_buffer.c b/tools/iio/generic_buffer.c index f805493be..4eebb6616 100644 --- a/tools/iio/generic_buffer.c +++ b/tools/iio/generic_buffer.c @@ -59,33 +59,80 @@ int size_from_channelarray(struct iio_channel_info *channels, int num_channels) return bytes; } -void print2byte(int input, struct iio_channel_info *info) +void print2byte(uint16_t input, struct iio_channel_info *info) { /* First swap if incorrect endian */ if (info->be) - input = be16toh((uint16_t)input); + input = be16toh(input); else - input = le16toh((uint16_t)input); + input = le16toh(input); /* * Shift before conversion to avoid sign extension * of left aligned data */ input >>= info->shift; + input &= info->mask; if (info->is_signed) { - int16_t val = input; + int16_t val = (int16_t)(input << (16 - info->bits_used)) >> + (16 - info->bits_used); + printf("%05f ", ((float)val + info->offset) * info->scale); + } else { + printf("%05f ", ((float)input + info->offset) * info->scale); + } +} + +void print4byte(uint32_t input, struct iio_channel_info *info) +{ + /* First swap if incorrect endian */ + if (info->be) + input = be32toh(input); + else + input = le32toh(input); - val &= (1 << info->bits_used) - 1; - val = (int16_t)(val << (16 - info->bits_used)) >> - (16 - info->bits_used); - printf("%05f ", ((float)val + info->offset)*info->scale); + /* + * Shift before conversion to avoid sign extension + * of left aligned data + */ + input >>= info->shift; + input &= info->mask; + if (info->is_signed) { + int32_t val = (int32_t)(input << (32 - info->bits_used)) >> + (32 - info->bits_used); + printf("%05f ", ((float)val + info->offset) * info->scale); } else { - uint16_t val = input; + printf("%05f ", ((float)input + info->offset) * info->scale); + } +} - val &= (1 << info->bits_used) - 1; - printf("%05f ", ((float)val + info->offset)*info->scale); +void print8byte(uint64_t input, struct iio_channel_info *info) +{ + /* First swap if incorrect endian */ + if (info->be) + input = be64toh(input); + else + input = le64toh(input); + + /* + * Shift before conversion to avoid sign extension + * of left aligned data + */ + input >>= info->shift; + input &= info->mask; + if (info->is_signed) { + int64_t val = (int64_t)(input << (64 - info->bits_used)) >> + (64 - info->bits_used); + /* special case for timestamp */ + if (info->scale == 1.0f && info->offset == 0.0f) + printf("%" PRId64 " ", val); + else + printf("%05f ", + ((float)val + info->offset) * info->scale); + } else { + printf("%05f ", ((float)input + info->offset) * info->scale); } } + /** * process_scan() - print out the values in SI units * @data: pointer to the start of the scan @@ -108,32 +155,12 @@ void process_scan(char *data, &channels[k]); break; case 4: - if (!channels[k].is_signed) { - uint32_t val = *(uint32_t *) - (data + channels[k].location); - printf("%05f ", ((float)val + - channels[k].offset)* - channels[k].scale); - - } + print4byte(*(uint32_t *)(data + channels[k].location), + &channels[k]); break; case 8: - if (channels[k].is_signed) { - int64_t val = *(int64_t *) - (data + - channels[k].location); - if ((val >> channels[k].bits_used) & 1) - val = (val & channels[k].mask) | - ~channels[k].mask; - /* special case for timestamp */ - if (channels[k].scale == 1.0f && - channels[k].offset == 0.0f) - printf("%" PRId64 " ", val); - else - printf("%05f ", ((float)val + - channels[k].offset)* - channels[k].scale); - } + print8byte(*(uint64_t *)(data + channels[k].location), + &channels[k]); break; default: break; @@ -141,6 +168,19 @@ void process_scan(char *data, printf("\n"); } +void print_usage(void) +{ + printf("Usage: generic_buffer [options]...\n" + "Capture, convert and output data from IIO device buffer\n" + " -c Do n conversions\n" + " -e Disable wait for event (new data)\n" + " -g Use trigger-less mode\n" + " -l Set buffer length to n samples\n" + " -n Set device name (mandatory)\n" + " -t Set trigger name\n" + " -w Set delay between reads in us (event-less mode)\n"); +} + int main(int argc, char **argv) { unsigned long num_loops = 2; @@ -166,8 +206,26 @@ int main(int argc, char **argv) struct iio_channel_info *channels; - while ((c = getopt(argc, argv, "l:w:c:et:n:g")) != -1) { + while ((c = getopt(argc, argv, "c:egl:n:t:w:")) != -1) { switch (c) { + case 'c': + errno = 0; + num_loops = strtoul(optarg, &dummy, 10); + if (errno) + return -errno; + break; + case 'e': + noevents = 1; + break; + case 'g': + notrigger = 1; + break; + case 'l': + errno = 0; + buf_len = strtoul(optarg, &dummy, 10); + if (errno) + return -errno; + break; case 'n': device_name = optarg; break; @@ -175,39 +233,35 @@ int main(int argc, char **argv) trigger_name = optarg; datardytrigger = 0; break; - case 'e': - noevents = 1; - break; - case 'c': - num_loops = strtoul(optarg, &dummy, 10); - break; case 'w': + errno = 0; timedelay = strtoul(optarg, &dummy, 10); - break; - case 'l': - buf_len = strtoul(optarg, &dummy, 10); - break; - case 'g': - notrigger = 1; + if (errno) + return -errno; break; case '?': + print_usage(); return -1; } } - if (device_name == NULL) + if (device_name == NULL) { + printf("Device name not set\n"); + print_usage(); return -1; + } /* 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); - ret = -ENODEV; - goto error_ret; + return dev_num; } printf("iio device number being used is %d\n", dev_num); - asprintf(&dev_dir_name, "%siio:device%d", iio_dir, dev_num); + ret = asprintf(&dev_dir_name, "%siio:device%d", iio_dir, dev_num); + if (ret < 0) + return -ENOMEM; if (!notrigger) { if (trigger_name == NULL) { @@ -220,7 +274,7 @@ int main(int argc, char **argv) "%s-dev%d", device_name, dev_num); if (ret < 0) { ret = -ENOMEM; - goto error_ret; + goto error_free_dev_dir_name; } } @@ -228,7 +282,7 @@ int main(int argc, char **argv) trig_num = find_type_by_name(trigger_name, "trigger"); if (trig_num < 0) { printf("Failed to find the trigger %s\n", trigger_name); - ret = -ENODEV; + ret = trig_num; goto error_free_triggername; } printf("iio trigger number being used is %d\n", trig_num); @@ -255,7 +309,7 @@ int main(int argc, char **argv) "%siio:device%d/buffer", iio_dir, dev_num); if (ret < 0) { ret = -ENOMEM; - goto error_free_triggername; + goto error_free_channels; } if (!notrigger) { @@ -296,8 +350,8 @@ int main(int argc, char **argv) /* Attempt to open non blocking the access dev */ fp = open(buffer_access, O_RDONLY | O_NONBLOCK); if (fp == -1) { /* If it isn't there make the node */ - printf("Failed to open %s\n", buffer_access); ret = -errno; + printf("Failed to open %s\n", buffer_access); goto error_free_buffer_access; } @@ -309,7 +363,14 @@ int main(int argc, char **argv) .events = POLLIN, }; - poll(&pfd, 1, -1); + ret = poll(&pfd, 1, -1); + if (ret < 0) { + ret = -errno; + goto error_close_buffer_access; + } else if (ret == 0) { + continue; + } + toread = buf_len; } else { @@ -321,7 +382,7 @@ int main(int argc, char **argv) data, toread*scan_size); if (read_size < 0) { - if (errno == -EAGAIN) { + if (errno == EAGAIN) { printf("nothing available\n"); continue; } else @@ -340,20 +401,31 @@ int main(int argc, char **argv) if (!notrigger) /* Disconnect the trigger - just write a dummy name. */ - write_sysfs_string("trigger/current_trigger", - dev_dir_name, "NULL"); + ret = write_sysfs_string("trigger/current_trigger", + dev_dir_name, "NULL"); + if (ret < 0) + printf("Failed to write to %s\n", dev_dir_name); error_close_buffer_access: - close(fp); -error_free_data: - free(data); + if (close(fp) == -1) + perror("Failed to close buffer"); error_free_buffer_access: free(buffer_access); +error_free_data: + free(data); error_free_buf_dir_name: free(buf_dir_name); +error_free_channels: + for (i = num_channels - 1; i >= 0; i--) { + free(channels[i].name); + free(channels[i].generic_name); + } + free(channels); error_free_triggername: if (datardytrigger) free(trigger_name); -error_ret: +error_free_dev_dir_name: + free(dev_dir_name); + return ret; } diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c index 427c271ac..016760e76 100644 --- a/tools/iio/iio_event_monitor.c +++ b/tools/iio/iio_event_monitor.c @@ -213,23 +213,19 @@ static void print_event(struct iio_event_data *event) return; } - printf("Event: time: %lld, ", event->timestamp); + printf("Event: time: %lld, type: %s", event->timestamp, + iio_chan_type_name_spec[type]); - if (mod != IIO_NO_MOD) { - printf("type: %s(%s), ", - iio_chan_type_name_spec[type], - iio_modifier_names[mod]); - } else { - printf("type: %s, ", - iio_chan_type_name_spec[type]); - } + if (mod != IIO_NO_MOD) + printf("(%s)", iio_modifier_names[mod]); - if (diff && chan >= 0 && chan2 >= 0) - printf("channel: %d-%d, ", chan, chan2); - else if (chan >= 0) - printf("channel: %d, ", chan); + if (chan >= 0) { + printf(", channel: %d", chan); + if (diff && chan2 >= 0) + printf("-%d", chan2); + } - printf("evtype: %s", iio_ev_type_text[ev_type]); + printf(", evtype: %s", iio_ev_type_text[ev_type]); if (dir != IIO_EV_DIR_NONE) printf(", direction: %s", iio_ev_dir_text[dir]); @@ -258,28 +254,34 @@ int main(int argc, char **argv) device_name, dev_num); ret = asprintf(&chrdev_name, "/dev/iio:device%d", dev_num); if (ret < 0) { - ret = -ENOMEM; - goto error_ret; + return -ENOMEM; } } else { /* If we can't find a IIO device by name assume device_name is a IIO chrdev */ chrdev_name = strdup(device_name); + if (!chrdev_name) + return -ENOMEM; } fd = open(chrdev_name, 0); if (fd == -1) { - fprintf(stdout, "Failed to open %s\n", chrdev_name); ret = -errno; + fprintf(stdout, "Failed to open %s\n", chrdev_name); goto error_free_chrdev_name; } ret = ioctl(fd, IIO_GET_EVENT_FD_IOCTL, &event_fd); - - close(fd); - if (ret == -1 || event_fd == -1) { + ret = -errno; fprintf(stdout, "Failed to retrieve event fd\n"); + if (close(fd) == -1) + perror("Failed to close character device file"); + + goto error_free_chrdev_name; + } + + if (close(fd) == -1) { ret = -errno; goto error_free_chrdev_name; } @@ -291,8 +293,8 @@ int main(int argc, char **argv) printf("nothing available\n"); continue; } else { - perror("Failed to read event from device"); ret = -errno; + perror("Failed to read event from device"); break; } } @@ -300,9 +302,11 @@ int main(int argc, char **argv) print_event(&event); } - close(event_fd); + if (close(event_fd) == -1) + perror("Failed to close event file"); + error_free_chrdev_name: free(chrdev_name); -error_ret: + return ret; } diff --git a/tools/iio/iio_utils.c b/tools/iio/iio_utils.c index 6f6452167..ec9ab7f9a 100644 --- a/tools/iio/iio_utils.c +++ b/tools/iio/iio_utils.c @@ -29,6 +29,8 @@ static char * const iio_direction[] = { * iioutils_break_up_name() - extract generic name from full channel name * @full_name: the full channel name * @generic_name: the output generic channel name + * + * Returns 0 on success, or a negative error code if string extraction failed. **/ int iioutils_break_up_name(const char *full_name, char **generic_name) @@ -36,7 +38,7 @@ int iioutils_break_up_name(const char *full_name, char *current; char *w, *r; char *working, *prefix = ""; - int i; + int i, ret; for (i = 0; i < sizeof(iio_direction) / sizeof(iio_direction[0]); i++) if (!strncmp(full_name, iio_direction[i], @@ -46,7 +48,14 @@ int iioutils_break_up_name(const char *full_name, } current = strdup(full_name + strlen(prefix) + 1); + if (!current) + return -ENOMEM; + working = strtok(current, "_\0"); + if (!working) { + free(current); + return -EINVAL; + } w = working; r = working; @@ -59,21 +68,25 @@ int iioutils_break_up_name(const char *full_name, r++; } *w = '\0'; - asprintf(generic_name, "%s_%s", prefix, working); + ret = asprintf(generic_name, "%s_%s", prefix, working); free(current); - return 0; + return (ret == -1) ? -ENOMEM : 0; } /** * iioutils_get_type() - find and process _type attribute data * @is_signed: output whether channel is signed * @bytes: output how many bytes the channel storage occupies + * @bits_used: output number of valid bits of data + * @shift: output amount of bits to shift right data before applying bit mask * @mask: output a bit mask for the raw data - * @be: big endian - * @device_dir: the iio device directory + * @be: output if data in big endian + * @device_dir: the IIO device directory * @name: the channel name * @generic_name: the channel type name + * + * Returns a value >= 0 on success, otherwise a negative error code. **/ int iioutils_get_type(unsigned *is_signed, unsigned *bytes, @@ -94,10 +107,9 @@ int iioutils_get_type(unsigned *is_signed, const struct dirent *ent; ret = asprintf(&scan_el_dir, FORMAT_SCAN_ELEMENTS_DIR, device_dir); - if (ret < 0) { - ret = -ENOMEM; - goto error_ret; - } + if (ret < 0) + return -ENOMEM; + ret = asprintf(&builtname, FORMAT_TYPE_FILE, name); if (ret < 0) { ret = -ENOMEM; @@ -114,6 +126,7 @@ int iioutils_get_type(unsigned *is_signed, ret = -errno; goto error_free_builtname_generic; } + ret = -ENOENT; while (ent = readdir(dp), ent != NULL) /* * Do we allow devices to override a generic name with @@ -129,8 +142,8 @@ int iioutils_get_type(unsigned *is_signed, } sysfsfp = fopen(filename, "r"); if (sysfsfp == NULL) { - printf("failed to open %s\n", filename); ret = -errno; + printf("failed to open %s\n", filename); goto error_free_filename; } @@ -141,8 +154,12 @@ int iioutils_get_type(unsigned *is_signed, bits_used, &padint, shift); if (ret < 0) { - printf("failed to pass scan type description\n"); ret = -errno; + printf("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"); goto error_close_sysfsfp; } *be = (endianchar == 'b'); @@ -151,34 +168,50 @@ int iioutils_get_type(unsigned *is_signed, *mask = ~0; else *mask = (1 << *bits_used) - 1; - if (signchar == 's') - *is_signed = 1; - else - *is_signed = 0; - fclose(sysfsfp); + *is_signed = (signchar == 's'); + if (fclose(sysfsfp)) { + ret = -errno; + printf("Failed to close %s\n", filename); + goto error_free_filename; + } + + sysfsfp = 0; free(filename); filename = 0; - sysfsfp = 0; } error_close_sysfsfp: if (sysfsfp) - fclose(sysfsfp); + if (fclose(sysfsfp)) + perror("iioutils_get_type(): Failed to close file"); + error_free_filename: if (filename) free(filename); error_closedir: - closedir(dp); + if (closedir(dp) == -1) + perror("iioutils_get_type(): Failed to close directory"); + error_free_builtname_generic: free(builtname_generic); error_free_builtname: free(builtname); error_free_scan_el_dir: free(scan_el_dir); -error_ret: + return ret; } +/** + * iioutils_get_param_float() - read a float value from a channel parameter + * @output: output the float value + * @param_name: the parameter name to read + * @device_dir: the IIO device directory in sysfs + * @name: the channel name + * @generic_name: the channel type name + * + * Returns a value >= 0 on success, otherwise a negative error code. + **/ int iioutils_get_param_float(float *output, const char *param_name, const char *device_dir, @@ -193,10 +226,9 @@ int iioutils_get_param_float(float *output, const struct dirent *ent; ret = asprintf(&builtname, "%s_%s", name, param_name); - if (ret < 0) { - ret = -ENOMEM; - goto error_ret; - } + if (ret < 0) + return -ENOMEM; + ret = asprintf(&builtname_generic, "%s_%s", generic_name, param_name); if (ret < 0) { @@ -208,6 +240,7 @@ int iioutils_get_param_float(float *output, ret = -errno; goto error_free_builtname_generic; } + ret = -ENOENT; while (ent = readdir(dp), ent != NULL) if ((strcmp(builtname, ent->d_name) == 0) || (strcmp(builtname_generic, ent->d_name) == 0)) { @@ -222,25 +255,31 @@ int iioutils_get_param_float(float *output, ret = -errno; goto error_free_filename; } - fscanf(sysfsfp, "%f", output); + errno = 0; + if (fscanf(sysfsfp, "%f", output) != 1) + ret = errno ? -errno : -ENODATA; + break; } error_free_filename: if (filename) free(filename); error_closedir: - closedir(dp); + if (closedir(dp) == -1) + perror("iioutils_get_param_float(): Failed to close directory"); + error_free_builtname_generic: free(builtname_generic); error_free_builtname: free(builtname); -error_ret: + return ret; } /** - * bsort_channel_array_by_index() - reorder so that the array is in index order - * + * bsort_channel_array_by_index() - sort the array in index order + * @ci_array: the iio_channel_info array to be sorted + * @cnt: the amount of array elements **/ void bsort_channel_array_by_index(struct iio_channel_info **ci_array, @@ -262,7 +301,10 @@ void bsort_channel_array_by_index(struct iio_channel_info **ci_array, /** * build_channel_array() - function to figure out what channels are present * @device_dir: the IIO device directory in sysfs - * @ + * @ci_array: output the resulting array of iio_channel_info + * @counter: output the amount of array elements + * + * Returns 0 on success, otherwise a negative error code. **/ int build_channel_array(const char *device_dir, struct iio_channel_info **ci_array, @@ -270,7 +312,7 @@ int build_channel_array(const char *device_dir, { DIR *dp; FILE *sysfsfp; - int count, i; + int count = 0, i; struct iio_channel_info *current; int ret; const struct dirent *ent; @@ -279,10 +321,9 @@ int build_channel_array(const char *device_dir, *counter = 0; ret = asprintf(&scan_el_dir, FORMAT_SCAN_ELEMENTS_DIR, device_dir); - if (ret < 0) { - ret = -ENOMEM; - goto error_ret; - } + if (ret < 0) + return -ENOMEM; + dp = opendir(scan_el_dir); if (dp == NULL) { ret = -errno; @@ -303,10 +344,24 @@ int build_channel_array(const char *device_dir, free(filename); goto error_close_dir; } - fscanf(sysfsfp, "%i", &ret); + errno = 0; + if (fscanf(sysfsfp, "%i", &ret) != 1) { + ret = errno ? -errno : -ENODATA; + if (fclose(sysfsfp)) + perror("build_channel_array(): Failed to close file"); + + free(filename); + goto error_close_dir; + } + if (ret == 1) (*counter)++; - fclose(sysfsfp); + if (fclose(sysfsfp)) { + ret = -errno; + free(filename); + goto error_close_dir; + } + free(filename); } *ci_array = malloc(sizeof(**ci_array) * (*counter)); @@ -315,7 +370,6 @@ int build_channel_array(const char *device_dir, goto error_close_dir; } seekdir(dp, 0); - count = 0; while (ent = readdir(dp), ent != NULL) { if (strcmp(ent->d_name + strlen(ent->d_name) - strlen("_en"), "_en") == 0) { @@ -332,12 +386,25 @@ int build_channel_array(const char *device_dir, } sysfsfp = fopen(filename, "r"); if (sysfsfp == NULL) { + ret = -errno; free(filename); + count--; + goto error_cleanup_array; + } + errno = 0; + if (fscanf(sysfsfp, "%i", ¤t_enabled) != 1) { + ret = errno ? -errno : -ENODATA; + free(filename); + count--; + goto error_cleanup_array; + } + + if (fclose(sysfsfp)) { ret = -errno; + free(filename); + count--; goto error_cleanup_array; } - fscanf(sysfsfp, "%i", ¤t_enabled); - fclose(sysfsfp); if (!current_enabled) { free(filename); @@ -353,6 +420,7 @@ int build_channel_array(const char *device_dir, if (current->name == NULL) { free(filename); ret = -ENOMEM; + count--; goto error_cleanup_array; } /* Get the generic and specific name elements */ @@ -360,6 +428,8 @@ int build_channel_array(const char *device_dir, ¤t->generic_name); if (ret) { free(filename); + free(current->name); + count--; goto error_cleanup_array; } ret = asprintf(&filename, @@ -372,8 +442,29 @@ int build_channel_array(const char *device_dir, goto error_cleanup_array; } sysfsfp = fopen(filename, "r"); - fscanf(sysfsfp, "%u", ¤t->index); - fclose(sysfsfp); + if (sysfsfp == NULL) { + ret = -errno; + printf("failed to open %s\n", filename); + free(filename); + goto error_cleanup_array; + } + + errno = 0; + if (fscanf(sysfsfp, "%u", ¤t->index) != 1) { + ret = errno ? -errno : -ENODATA; + if (fclose(sysfsfp)) + perror("build_channel_array(): Failed to close file"); + + free(filename); + goto error_cleanup_array; + } + + if (fclose(sysfsfp)) { + ret = -errno; + free(filename); + goto error_cleanup_array; + } + free(filename); /* Find the scale */ ret = iioutils_get_param_float(¤t->scale, @@ -399,38 +490,64 @@ int build_channel_array(const char *device_dir, device_dir, current->name, current->generic_name); + if (ret < 0) + goto error_cleanup_array; } } - closedir(dp); + if (closedir(dp) == -1) { + ret = -errno; + goto error_cleanup_array; + } + + free(scan_el_dir); /* reorder so that the array is in index order */ bsort_channel_array_by_index(ci_array, *counter); return 0; error_cleanup_array: - for (i = count - 1; i >= 0; i--) + for (i = count - 1; i >= 0; i--) { free((*ci_array)[i].name); + free((*ci_array)[i].generic_name); + } free(*ci_array); error_close_dir: - closedir(dp); + if (dp) + if (closedir(dp) == -1) + perror("build_channel_array(): Failed to close dir"); + error_free_name: free(scan_el_dir); -error_ret: + return ret; } +int calc_digits(int num) +{ + int count = 0; + + while (num != 0) { + num /= 10; + count++; + } + + return count; +} + /** * find_type_by_name() - function to match top level types by name * @name: top level type instance name - * @type: the type of top level instance being sort + * @type: the type of top level instance being searched * + * Returns the device number of a matched IIO device on success, otherwise a + * negative error code. * Typical types this is used for are device and trigger. **/ int find_type_by_name(const char *name, const char *type) { const struct dirent *ent; - int number, numstrlen; + int number, numstrlen, ret; FILE *nameFile; DIR *dp; @@ -448,9 +565,19 @@ int find_type_by_name(const char *name, const char *type) strcmp(ent->d_name, "..") != 0 && strlen(ent->d_name) > strlen(type) && strncmp(ent->d_name, type, strlen(type)) == 0) { - numstrlen = sscanf(ent->d_name + strlen(type), - "%d", - &number); + errno = 0; + ret = sscanf(ent->d_name + strlen(type), "%d", &number); + if (ret < 0) { + ret = -errno; + printf("failed to read element number\n"); + goto error_close_dir; + } else if (ret != 1) { + ret = -EIO; + printf("failed to match element number\n"); + goto error_close_dir; + } + + numstrlen = calc_digits(number); /* verify the next character is not a colon */ if (strncmp(ent->d_name + strlen(type) + numstrlen, ":", @@ -460,33 +587,55 @@ int find_type_by_name(const char *name, const char *type) + numstrlen + 6); if (filename == NULL) { - closedir(dp); - return -ENOMEM; + ret = -ENOMEM; + goto error_close_dir; } - sprintf(filename, "%s%s%d/name", - iio_dir, - type, - number); + + ret = sprintf(filename, "%s%s%d/name", iio_dir, + type, number); + if (ret < 0) { + free(filename); + goto error_close_dir; + } + nameFile = fopen(filename, "r"); if (!nameFile) { free(filename); continue; } free(filename); - fscanf(nameFile, "%s", thisname); - fclose(nameFile); + errno = 0; + if (fscanf(nameFile, "%s", thisname) != 1) { + ret = errno ? -errno : -ENODATA; + goto error_close_dir; + } + + if (fclose(nameFile)) { + ret = -errno; + goto error_close_dir; + } + if (strcmp(name, thisname) == 0) { - closedir(dp); + if (closedir(dp) == -1) + return -errno; return number; } } } } - closedir(dp); + if (closedir(dp) == -1) + return -errno; + return -ENODEV; + +error_close_dir: + if (closedir(dp) == -1) + perror("find_type_by_name(): Failed to close directory"); + return ret; } -int _write_sysfs_int(char *filename, char *basedir, int val, int verify) +static int _write_sysfs_int(const char *filename, const char *basedir, int val, + int verify) { int ret = 0; FILE *sysfsfp; @@ -495,24 +644,49 @@ int _write_sysfs_int(char *filename, char *basedir, int val, int verify) if (temp == NULL) return -ENOMEM; - sprintf(temp, "%s/%s", basedir, filename); + ret = sprintf(temp, "%s/%s", basedir, filename); + if (ret < 0) + goto error_free; + sysfsfp = fopen(temp, "w"); if (sysfsfp == NULL) { + ret = -errno; printf("failed to open %s\n", temp); + goto error_free; + } + ret = fprintf(sysfsfp, "%d", val); + if (ret < 0) { + if (fclose(sysfsfp)) + perror("_write_sysfs_int(): Failed to close dir"); + + goto error_free; + } + + if (fclose(sysfsfp)) { ret = -errno; goto error_free; } - fprintf(sysfsfp, "%d", val); - fclose(sysfsfp); + if (verify) { sysfsfp = fopen(temp, "r"); if (sysfsfp == NULL) { + ret = -errno; printf("failed to open %s\n", temp); + goto error_free; + } + if (fscanf(sysfsfp, "%d", &test) != 1) { + ret = errno ? -errno : -ENODATA; + if (fclose(sysfsfp)) + perror("_write_sysfs_int(): Failed to close dir"); + + goto error_free; + } + + if (fclose(sysfsfp)) { ret = -errno; goto error_free; } - fscanf(sysfsfp, "%d", &test); - fclose(sysfsfp); + if (test != val) { printf("Possible failure in int write %d to %s%s\n", val, @@ -526,17 +700,36 @@ error_free: return ret; } -int write_sysfs_int(char *filename, char *basedir, int val) +/** + * write_sysfs_int() - write an integer value to a sysfs file + * @filename: name of the file to write to + * @basedir: the sysfs directory in which the file is to be found + * @val: integer value to write to file + * + * Returns a value >= 0 on success, otherwise a negative error code. + **/ +int write_sysfs_int(const char *filename, const char *basedir, int val) { return _write_sysfs_int(filename, basedir, val, 0); } -int write_sysfs_int_and_verify(char *filename, char *basedir, int val) +/** + * write_sysfs_int_and_verify() - write an integer value to a sysfs file + * and verify + * @filename: name of the file to write to + * @basedir: the sysfs directory in which the file is to be found + * @val: integer value to write to file + * + * Returns a value >= 0 on success, otherwise a negative error code. + **/ +int write_sysfs_int_and_verify(const char *filename, const char *basedir, + int val) { return _write_sysfs_int(filename, basedir, val, 1); } -int _write_sysfs_string(char *filename, char *basedir, char *val, int verify) +static int _write_sysfs_string(const char *filename, const char *basedir, + const char *val, int verify) { int ret = 0; FILE *sysfsfp; @@ -546,24 +739,49 @@ int _write_sysfs_string(char *filename, char *basedir, char *val, int verify) printf("Memory allocation failed\n"); return -ENOMEM; } - sprintf(temp, "%s/%s", basedir, filename); + ret = sprintf(temp, "%s/%s", basedir, filename); + if (ret < 0) + goto error_free; + sysfsfp = fopen(temp, "w"); if (sysfsfp == NULL) { + ret = -errno; printf("Could not open %s\n", temp); + goto error_free; + } + ret = fprintf(sysfsfp, "%s", val); + if (ret < 0) { + if (fclose(sysfsfp)) + perror("_write_sysfs_string(): Failed to close dir"); + + goto error_free; + } + + if (fclose(sysfsfp)) { ret = -errno; goto error_free; } - fprintf(sysfsfp, "%s", val); - fclose(sysfsfp); + if (verify) { sysfsfp = fopen(temp, "r"); if (sysfsfp == NULL) { + ret = -errno; printf("could not open file to verify\n"); + goto error_free; + } + if (fscanf(sysfsfp, "%s", temp) != 1) { + ret = errno ? -errno : -ENODATA; + if (fclose(sysfsfp)) + perror("_write_sysfs_string(): Failed to close dir"); + + goto error_free; + } + + if (fclose(sysfsfp)) { ret = -errno; goto error_free; } - fscanf(sysfsfp, "%s", temp); - fclose(sysfsfp); + if (strcmp(temp, val) != 0) { printf("Possible failure in string write of %s " "Should be %s " @@ -586,18 +804,38 @@ error_free: * @filename: name of file to write to * @basedir: the sysfs directory in which the file is to be found * @val: the string to write + * + * Returns a value >= 0 on success, otherwise a negative error code. **/ -int write_sysfs_string_and_verify(char *filename, char *basedir, char *val) +int write_sysfs_string_and_verify(const char *filename, const char *basedir, + const char *val) { return _write_sysfs_string(filename, basedir, val, 1); } -int write_sysfs_string(char *filename, char *basedir, char *val) +/** + * write_sysfs_string() - write string to a sysfs file + * @filename: name of file to write to + * @basedir: the sysfs directory in which the file is to be found + * @val: the string to write + * + * Returns a value >= 0 on success, otherwise a negative error code. + **/ +int write_sysfs_string(const char *filename, const char *basedir, + const char *val) { return _write_sysfs_string(filename, basedir, val, 0); } -int read_sysfs_posint(char *filename, char *basedir) +/** + * read_sysfs_posint() - read an integer value from file + * @filename: name of file to read from + * @basedir: the sysfs directory in which the file is to be found + * + * Returns the read integer value >= 0 on success, otherwise a negative error + * code. + **/ +int read_sysfs_posint(const char *filename, const char *basedir) { int ret; FILE *sysfsfp; @@ -607,20 +845,41 @@ int read_sysfs_posint(char *filename, char *basedir) printf("Memory allocation failed"); return -ENOMEM; } - sprintf(temp, "%s/%s", basedir, filename); + ret = sprintf(temp, "%s/%s", basedir, filename); + if (ret < 0) + goto error_free; + sysfsfp = fopen(temp, "r"); if (sysfsfp == NULL) { ret = -errno; goto error_free; } - fscanf(sysfsfp, "%d\n", &ret); - fclose(sysfsfp); + errno = 0; + if (fscanf(sysfsfp, "%d\n", &ret) != 1) { + ret = errno ? -errno : -ENODATA; + if (fclose(sysfsfp)) + perror("read_sysfs_posint(): Failed to close dir"); + + goto error_free; + } + + if (fclose(sysfsfp)) + ret = -errno; + error_free: free(temp); return ret; } -int read_sysfs_float(char *filename, char *basedir, float *val) +/** + * read_sysfs_float() - read a float value from file + * @filename: name of file to read from + * @basedir: the sysfs directory in which the file is to be found + * @val: output the read float value + * + * Returns a value >= 0 on success, otherwise a negative error code. + **/ +int read_sysfs_float(const char *filename, const char *basedir, float *val) { int ret = 0; FILE *sysfsfp; @@ -630,19 +889,40 @@ int read_sysfs_float(char *filename, char *basedir, float *val) printf("Memory allocation failed"); return -ENOMEM; } - sprintf(temp, "%s/%s", basedir, filename); + ret = sprintf(temp, "%s/%s", basedir, filename); + if (ret < 0) + goto error_free; + sysfsfp = fopen(temp, "r"); if (sysfsfp == NULL) { ret = -errno; goto error_free; } - fscanf(sysfsfp, "%f\n", val); - fclose(sysfsfp); + errno = 0; + if (fscanf(sysfsfp, "%f\n", val) != 1) { + ret = errno ? -errno : -ENODATA; + if (fclose(sysfsfp)) + perror("read_sysfs_float(): Failed to close dir"); + + goto error_free; + } + + if (fclose(sysfsfp)) + ret = -errno; + error_free: free(temp); return ret; } +/** + * read_sysfs_string() - read a string from file + * @filename: name of file to read from + * @basedir: the sysfs directory in which the file is to be found + * @str: output the read string + * + * Returns a value >= 0 on success, otherwise a negative error code. + **/ int read_sysfs_string(const char *filename, const char *basedir, char *str) { int ret = 0; @@ -653,14 +933,27 @@ int read_sysfs_string(const char *filename, const char *basedir, char *str) printf("Memory allocation failed"); return -ENOMEM; } - sprintf(temp, "%s/%s", basedir, filename); + ret = sprintf(temp, "%s/%s", basedir, filename); + if (ret < 0) + goto error_free; + sysfsfp = fopen(temp, "r"); if (sysfsfp == NULL) { ret = -errno; goto error_free; } - fscanf(sysfsfp, "%s\n", str); - fclose(sysfsfp); + errno = 0; + if (fscanf(sysfsfp, "%s\n", str) != 1) { + ret = errno ? -errno : -ENODATA; + if (fclose(sysfsfp)) + perror("read_sysfs_string(): Failed to close dir"); + + goto error_free; + } + + if (fclose(sysfsfp)) + ret = -errno; + error_free: free(temp); return ret; diff --git a/tools/iio/iio_utils.h b/tools/iio/iio_utils.h index 1bc837b2d..379eed9de 100644 --- a/tools/iio/iio_utils.h +++ b/tools/iio/iio_utils.h @@ -28,9 +28,12 @@ extern const char *iio_dir; * @offset: offset to be applied for conversion to si units * @index: the channel index in the buffer output * @bytes: number of bytes occupied in buffer output + * @bits_used: number of valid bits of data + * @shift: amount of bits to shift right data before applying bit mask * @mask: a bit mask for the raw output + * @be: flag if data is big endian * @is_signed: is the raw value stored signed - * @enabled: is this channel enabled + * @location: data offset for this channel inside the buffer (in bytes) **/ struct iio_channel_info { char *name; @@ -60,12 +63,15 @@ void bsort_channel_array_by_index(struct iio_channel_info **ci_array, int cnt); int build_channel_array(const char *device_dir, struct iio_channel_info **ci_array, int *counter); int find_type_by_name(const char *name, const char *type); -int write_sysfs_int(char *filename, char *basedir, int val); -int write_sysfs_int_and_verify(char *filename, char *basedir, int val); -int write_sysfs_string_and_verify(char *filename, char *basedir, char *val); -int write_sysfs_string(char *filename, char *basedir, char *val); -int read_sysfs_posint(char *filename, char *basedir); -int read_sysfs_float(char *filename, char *basedir, float *val); +int write_sysfs_int(const char *filename, const char *basedir, int val); +int write_sysfs_int_and_verify(const char *filename, const char *basedir, + int val); +int write_sysfs_string_and_verify(const char *filename, const char *basedir, + const char *val); +int write_sysfs_string(const char *filename, const char *basedir, + const char *val); +int read_sysfs_posint(const char *filename, const char *basedir); +int read_sysfs_float(const char *filename, const char *basedir, float *val); int read_sysfs_string(const char *filename, const char *basedir, char *str); #endif /* _IIO_UTILS_H_ */ diff --git a/tools/iio/lsiio.c b/tools/iio/lsiio.c index c585440f8..b59ee1733 100644 --- a/tools/iio/lsiio.c +++ b/tools/iio/lsiio.c @@ -56,7 +56,7 @@ static int dump_channels(const char *dev_dir_name) printf(" %-10s\n", ent->d_name); } - return 0; + return (closedir(dp) == -1) ? -errno : 0; } static int dump_one_device(const char *dev_dir_name) @@ -69,7 +69,10 @@ static int dump_one_device(const char *dev_dir_name) "%i", &dev_idx); if (retval != 1) return -EINVAL; - read_sysfs_string("name", dev_dir_name, name); + retval = read_sysfs_string("name", dev_dir_name, name); + if (retval) + return retval; + printf("Device %03d: %s\n", dev_idx, name); if (verblevel >= VERBLEVEL_SENSORS) @@ -87,28 +90,42 @@ static int dump_one_trigger(const char *dev_dir_name) "%i", &dev_idx); if (retval != 1) return -EINVAL; - read_sysfs_string("name", dev_dir_name, name); + retval = read_sysfs_string("name", dev_dir_name, name); + if (retval) + return retval; + printf("Trigger %03d: %s\n", dev_idx, name); return 0; } -static void dump_devices(void) +static int dump_devices(void) { const struct dirent *ent; + int ret; DIR *dp; dp = opendir(iio_dir); if (dp == NULL) { printf("No industrial I/O devices available\n"); - return; + return -ENODEV; } while (ent = readdir(dp), ent != NULL) { if (check_prefix(ent->d_name, type_device)) { char *dev_dir_name; - asprintf(&dev_dir_name, "%s%s", iio_dir, ent->d_name); - dump_one_device(dev_dir_name); + if (asprintf(&dev_dir_name, "%s%s", iio_dir, + ent->d_name) < 0) { + ret = -ENOMEM; + goto error_close_dir; + } + + ret = dump_one_device(dev_dir_name); + if (ret) { + free(dev_dir_name); + goto error_close_dir; + } + free(dev_dir_name); if (verblevel >= VERBLEVEL_SENSORS) printf("\n"); @@ -119,19 +136,35 @@ static void dump_devices(void) if (check_prefix(ent->d_name, type_trigger)) { char *dev_dir_name; - asprintf(&dev_dir_name, "%s%s", iio_dir, ent->d_name); - dump_one_trigger(dev_dir_name); + if (asprintf(&dev_dir_name, "%s%s", iio_dir, + ent->d_name) < 0) { + ret = -ENOMEM; + goto error_close_dir; + } + + ret = dump_one_trigger(dev_dir_name); + if (ret) { + free(dev_dir_name); + goto error_close_dir; + } + free(dev_dir_name); } } - closedir(dp); + return (closedir(dp) == -1) ? -errno : 0; + +error_close_dir: + if (closedir(dp) == -1) + perror("dump_devices(): Failed to close directory"); + + return ret; } int main(int argc, char **argv) { int c, err = 0; - while ((c = getopt(argc, argv, "d:D:v")) != EOF) { + while ((c = getopt(argc, argv, "v")) != EOF) { switch (c) { case 'v': verblevel++; @@ -146,13 +179,9 @@ int main(int argc, char **argv) if (err || argc > optind) { fprintf(stderr, "Usage: lsiio [options]...\n" "List industrial I/O devices\n" - " -v, --verbose\n" - " Increase verbosity (may be given multiple times)\n" - ); + " -v Increase verbosity (may be given multiple times)\n"); exit(1); } - dump_devices(); - - return 0; + return dump_devices(); } -- cgit v1.2.3-54-g00ecf