diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/iio/iio_utils.c | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/tools/iio/iio_utils.c b/tools/iio/iio_utils.c index c5b4136e648a..60e5ec4165b7 100644 --- a/tools/iio/iio_utils.c +++ b/tools/iio/iio_utils.c @@ -431,6 +431,18 @@ 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 @@ -441,7 +453,7 @@ error_ret: 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; @@ -459,9 +471,19 @@ 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, ":", @@ -495,6 +517,11 @@ int find_type_by_name(const char *name, const char *type) } closedir(dp); 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) |