9298393cf5
Debian 10 (Buster) has gcc 8.2 which warns about: error: ‘%s’ directive output may be truncated writing up to 19 bytes into a region of size between 10 and 59 [-Werror=format-truncation=] snprintf(path, sizeof(path), "%s/%s/state", ocp_dir, pinmux_dir);
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <syslog.h>
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#include "c_pinmux.h"
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#include "common.h"
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BBIO_err set_pin_mode(const char *key, const char *mode)
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{
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// char ocp_dir[] defined in common.h
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char path[100]; // "/sys/devices/platform/ocp/ocp:P#_##_pinmux/state"
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char pinmux_dir[20]; // "ocp:P#_##_pinmux"
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char pin[6]; //"P#_##"
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FILE *f = NULL;
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// pin mode can not be set for the built-in USRn LEDs
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if (strncmp(key, "USR", 3) == 0) {
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return BBIO_OK;
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}
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if (strlen(key) == 4) // Key P#_# format, must inject '0' to be P#_0#
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snprintf(pin, sizeof(pin), "%.3s0%c", key,key[3]);
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else //copy string
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snprintf(pin, sizeof(pin), "%s", key);
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#ifndef BBBVERSION41
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BBIO_err err;
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err = build_path("/sys/devices/platform", "ocp", ocp_dir, sizeof(ocp_dir));
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if (err != BBIO_OK) {
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return err;
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}
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#else
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strncpy(ocp_dir, "/sys/devices/platform/ocp", sizeof(ocp_dir));
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#endif
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snprintf(pinmux_dir, sizeof(pinmux_dir), "ocp:%s_pinmux", pin);
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snprintf(path, sizeof(path), "%s/%s/state", ocp_dir, pinmux_dir);
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/* beaglebone blue has complete dtb file and does not need overlays */
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if(beaglebone_blue()) {
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fprintf(stderr, "DEBUG: Adafruit_BBIO: set_pin_mode() :: Pinmux file: %s, mode: %s", path, mode);
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fprintf(stderr, "DEBUG: Adafruit_BBIO: set_pin_mode(): beaglebone_blue() is TRUE; return BBIO_OK\n");
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return BBIO_OK;
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}
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f = fopen(path, "w");
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if (NULL == f) {
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return BBIO_ACCESS;
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}
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syslog(LOG_DEBUG, "Adafruit_BBIO: set_pin_mode() :: Pinmux file %s access OK", path);
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fprintf(f, "%s", mode);
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fclose(f);
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syslog(LOG_DEBUG, "Adafruit_BBIO: set_pin_mode() :: Set pinmux mode to %s for %s", mode, pin);
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return BBIO_OK;
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}
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