Saving parameters after shut down

component paramhelper; pin in float invalue "Receives value to save"; pin out float outvalue "Sends value"; pin in bit readtrigger = 0 "signal to read from file"; pin in bit writetrigger = 0 "signal to write to file"; option singleton yes; option userspace yes; author "ArcEye"; license "GPL"; ;; #include <stdio.h> /* Standard input/output definitions */ #include <stdlib.h> #include <stdint.h> /* Standard types */ #include <string.h> /* String function definitions */ #include <unistd.h> /* UNIX standard function definitions */ #include <fcntl.h> /* File control definitions */ #include <errno.h> /* Error number definitions */ #include <signal.h> int done = 0; void adios(int sig) { done = 1; } void user_mainloop(void) { char filepath[] = "~/emc2/param.sav"; int read = 0; signal(SIGINT, adios); signal(SIGTERM, adios); while(!done) { usleep(500000); FOR_ALL_INSTS() { if(readtrigger && !read) // only want to read once { FILE *fp; fp = fopen(filepath, "r"); fscanf(fp, "%f", (float*)&outvalue); read = 1; } else if(writetrigger) { FILE *fp; fp = fopen(filepath, "w"); fprintf(fp, "%f", invalue); } } } exit(0); }