From 9bbf7fccb1e84a0a32db9c81f5da012be9543250 Mon Sep 17 00:00:00 2001 From: manuelkamp <48356947+manuelkamp@users.noreply.github.com> Date: Tue, 21 Dec 2021 23:02:21 +0100 Subject: [PATCH] Delete netledPi.c --- netledPi.c | 298 ----------------------------------------------------- 1 file changed, 298 deletions(-) delete mode 100644 netledPi.c diff --git a/netledPi.c b/netledPi.c deleted file mode 100644 index 9136aef..0000000 --- a/netledPi.c +++ /dev/null @@ -1,298 +0,0 @@ -/************************************************************************** - * This is free and unencumbered software released into the public domain. - * - * Anyone is free to copy, modify, publish, use, compile, sell, or - * distribute this software, either in source code form or as a compiled - * binary, for any purpose, commercial or non-commercial, and by any - * means. - * - * In jurisdictions that recognize copyright laws, the author or authors - * of this software dedicate any and all copyright interest in the - * software to the public domain. We make this dedication for the benefit - * of the public at large and to the detriment of our heirs and - * successors. We intend this dedication to be an overt act of - * relinquishment in perpetuity of all present and future rights to this - * software under copyright law. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. - * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR - * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, - * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR - * OTHER DEALINGS IN THE SOFTWARE. - * - * For more information, please refer to - - * - * A network activity light for the Raspberry Pi, using an LED connected to a GPIO pin. - * Based on hddled.c - http://members.optusnet.com.au/foonly/whirlpool/code/hddled.c - - * This program uses the WiringPi library by Gordon Henderson - http://wiringpi.com/ - Thanks, Gordon! - * - * - * To compile: - * gcc -Wall -O3 -o netledPi netledPi.c -lwiringPi - * - * Options: - * -d, --detach Detach from terminal (become a daemon) - * -p, --pin=VALUE GPIO pin (using wiringPi numbering scheme) where LED is connected (default: 11) - * -r, --refresh=VALUE Refresh interval (default: 20 ms) - * - * GPIO pin ----|>|----[330]----+ - * LED | - * === - * Ground - * - * Default LED Pin - wiringPi pin 11 is BCM_GPIO 7, physical pin 26 on the Pi's P1 header. - * Note: This pin is also used for the SPI interface. If you have SPI add-ons connected, - * you'll have to use the -p option to change it to another, unused pin. - */ - - -#define NETDEVICES "/proc/net/dev" - - -#define _GNU_SOURCE - -#include -#include -#include -#include -#include -#include -#include -#include - - -static unsigned int o_refresh = 20; /* milliseconds */ -static unsigned int o_gpiopin_tx = 2; -static unsigned int o_gpiopin_rx = 3; -static int o_detach = 0; - -static volatile sig_atomic_t running = 1; -static char *line = NULL; -static size_t len = 0; - -/* Update the TX LED */ -void tx_led(int on) { - static int tx_current = 1; /* Ensure the LED turns off on first call */ - if (tx_current == on) - return; - - if (on) - gpioWrite( o_gpiopin_tx, PI_HIGH ); - else - gpioWrite( o_gpiopin_tx, PI_LOW ); - - tx_current = on; -} - -/* Update the RX LED */ -void rx_led(int on) { - static int rx_current = 1; /* Ensure the LED turns off on first call */ - if (rx_current == on) - return; - - if (on) - gpioWrite( o_gpiopin_rx, PI_HIGH ); - else - gpioWrite( o_gpiopin_rx, PI_LOW ); - - rx_current = on; -} - -/* Reread the netdevices file */ -int activity(FILE *netdevices) { - static unsigned int prev_inpackets, prev_outpackets; - unsigned int inpackets, outpackets; - unsigned int device_inpackets, device_outpackets; - int found_inpackets, found_outpackets; - int result; - char *ptr; - char device[32]; - - /* Go to the beginning of the netdevices file */ - result = TEMP_FAILURE_RETRY(fseek(netdevices, 0L, SEEK_SET)); - if (result) { - perror("Could not rewind " NETDEVICES); - return result; - } - - /* Clear glibc's buffer */ - result = TEMP_FAILURE_RETRY(fflush(netdevices)); - if (result) { - perror("Could not flush input stream"); - return result; - } - - /* Extract the I/O stats */ - inpackets = outpackets = 0; - found_inpackets = found_outpackets = 0; - device_inpackets = device_outpackets = 0; - while (getline(&line, &len, netdevices) != -1 && errno != EINTR) { - ptr = line; - while (*ptr == ' ') ptr++; // Skip leading spaces - if (sscanf(ptr, "%s %*u %u %*u %*u %*u %*u %*u %*u %*u %u %*u %*u %*u %*u %*u %*u", device, &device_inpackets, &device_outpackets)) { - if(strstr(device, "lo:")) continue; // Skip loopback interface - found_inpackets++; - found_outpackets++; - inpackets += device_inpackets; - outpackets += device_outpackets; - } - - } - if (!found_inpackets || !found_outpackets) { - fprintf(stderr, "Could not find required lines in " NETDEVICES); - return -1; - } - - /* Anything changed? */ - if( prev_inpackets != inpackets ) - rx_led( PI_HIGH ); - else - rx_led( PI_LOW ); - - if( prev_outpackets != outpackets ) - tx_led( PI_HIGH ); - else - tx_led( PI_LOW ); - - prev_inpackets = inpackets; - prev_outpackets = outpackets; - - return 0; -} - - - -/* Signal handler -- break out of the main loop */ -void shutdown(int sig) { - running = 0; -} - -/* Argp parser function */ -error_t parse_options(int key, char *arg, struct argp_state *state) { - switch (key) { - case 'd': - o_detach = 1; - break; - case 'r': - o_refresh = strtol(arg, NULL, 10); - if (o_refresh < 10) - argp_failure(state, EXIT_FAILURE, 0, - "refresh interval must be at least 10"); - break; - case 3: - o_gpiopin_tx = strtol(arg, NULL, 10); - if ((o_gpiopin_tx < 0) || (o_gpiopin_tx > 29)) - argp_failure(state, EXIT_FAILURE, 0, - "pin number must be between 0 and 29"); - break; - case 4: - o_gpiopin_rx = strtol(arg, NULL, 10); - if ((o_gpiopin_rx < 0) || (o_gpiopin_rx > 29)) - argp_failure(state, EXIT_FAILURE, 0, - "pin number must be between 0 and 29"); - break; - } - return 0; -} - -int main(int argc, char **argv) { - struct argp_option options[] = { - { "detach", 'd', NULL, 0, "Detach from terminal" }, - { "tx" , 0, "VALUE", 0, "GPIO pin where LED is connected (transmit data) (default: BCM 2 physical pin 3 on the P1 header)" }, - { "rx", 1, "VALUE", 0, "GPIO pin where LED is connected (receive data) (default: BCM 3 physical pin 5 on the P1 header)" }, - { "refresh", 'r', "VALUE", 0, "Refresh interval (default: 20 ms)" }, - { 0 }, - }; - struct argp parser = { - NULL, parse_options, NULL, - "Show network activity using an LED wired to a GPIO pin.", - NULL, NULL, NULL - }; - int status = EXIT_FAILURE; - FILE *netdevices = NULL; - struct timespec delay; - - /* Parse the command-line */ - parser.options = options; - if (argp_parse(&parser, argc, argv, ARGP_NO_ARGS, NULL, NULL)) - goto out; - - delay.tv_sec = o_refresh / 1000; - delay.tv_nsec = 1000000 * (o_refresh % 1000); - - /* If we can't set up pigpio, then just bail */ - if( gpioInitialise() < 0 ) { - fprintf( stderr, "Unable to setup the piGPIO library. STOP."); - return -1; - } - gpioSetMode( o_gpiopin_rx, PI_OUTPUT ); - gpioSetMode( o_gpiopin_tx, PI_OUTPUT ); - - - /* Open the netdevices file */ - netdevices = fopen(NETDEVICES, "r"); - if (!netdevices) { - perror("Could not open " NETDEVICES " for reading"); - goto out; - } - - /* Ensure the LED is off */ - tx_led(0); - rx_led(0); - - /* Save the current I/O stat values */ - if (activity(netdevices) < 0) - goto out; - - /* Detach from terminal? */ - if (o_detach) { - pid_t child = fork(); - if (child < 0) { - perror("Could not detach from terminal"); - goto out; - } - if (child) { - /* I am the parent */ - status = EXIT_SUCCESS; - goto out; - } - } - - /* We catch these signals so we can clean up */ - { - struct sigaction action; - memset(&action, 0, sizeof(action)); - action.sa_handler = shutdown; - sigemptyset(&action.sa_mask); - action.sa_flags = 0; /* We block on usleep; don't use SA_RESTART */ - sigaction(SIGHUP, &action, NULL); - sigaction(SIGINT, &action, NULL); - sigaction(SIGTERM, &action, NULL); - } - - /* Loop until signal received */ - while (running) { - if (nanosleep(&delay, NULL) < 0) - break; - if( activity(netdevices) < 0 ) - break; - } - - /* Ensure the LED is off */ - tx_led(0); - rx_led(0); - - status = EXIT_SUCCESS; - -out: - /* Halt any library functions */ - gpioTerminate(); - - if (line) free(line); - if (netdevices) fclose(netdevices); - return status; -} -