#include <sys\/types.h>\n#include <sys\/stat.h>\n#include <stdio.h>\n#include <stdlib.h>\n#include <fcntl.h>\n#include <errno.h>\n#include <unistd.h>\n#include <syslog.h>\n#include <string.h>\n\nint main(void) {\n\n \/* Our process ID and Session ID *\/\n pid_t pid, sid;\n\n \/* Fork off the parent process *\/\n pid = fork();\n if (pid < 0) {\n exit(EXIT_FAILURE);\n }\n \/* If we got a good PID, then\n we can exit the parent process. *\/\n if (pid > 0) {\n exit(EXIT_SUCCESS);\n }\n\n \/* Change the file mode mask *\/\n umask(0);\n\n \/* Open any logs here *\/\n\n \/* Create a new SID for the child process *\/\n sid = setsid();\n if (sid < 0) {\n \/* Log the failure *\/\n exit(EXIT_FAILURE);\n }\n\n \/* Change the current working directory *\/\n if ((chdir("\/")) < 0) {\n \/* Log the failure *\/\n exit(EXIT_FAILURE);\n }\n\n \/* Close out the standard file descriptors *\/\n close(STDIN_FILENO);\n close(STDOUT_FILENO);\n close(STDERR_FILENO);\n\n \/* Daemon-specific initialization goes here *\/\n\n \/* The Big Loop *\/\n while (1) {\n \/* Do some task here ... *\/\n\n sleep(30); \/* wait 30 seconds *\/\n }\n exit(EXIT_SUCCESS);\n}<\/code><\/pre>\nMakefile<\/h2>\n
vi Makefile<\/p>\n
AR=${CROSS_COMPILE}ar\nAS=${CROSS_COMPILE}as\nLD=${CROSS_COMPILE}ld\nCC=$(CROSS_COMPILE)gcc\nCXX=$(CROSS_COMPILE)g++\nNM=${CROSS_COMPILE}nm\nRANLIB=${CROSS_COMPILE}ranlib\n\nCFLAGS=""\nCPPFLAGS=""\nLDFLAGS=""\nLIBS=""\n\nhello : main.cpp\n $(CXX) -g -o mydaemon main.cpp\n\nclean:\n rm mydaemon<\/code><\/pre>\n