int main(int argc, char **argv) { int n; unsigned int seed; FILE *fout; if (argc < 2) { fprintf(stderr, "Usage: %s <n> [<seed>]\n", argv[0]); exit(1); } n = atoi(argv[1]); if (argc == 3) { seed = atoi(argv[1]); } fout = fopen("data.bin", "w"); if (!fout) { perror(""); } generate_file(n ,seed, fout); fclose(fout); exit(0); }
void generate_group(const char *group) { char *dir_name = get_group_directory(group); DIR *dirp; struct dirent *dp; char file_name[MAX_FILE_NAME]; struct stat stat_buf; if ((dirp = opendir(dir_name)) == NULL) return; while ((dp = readdir(dirp)) != NULL) { snprintf(file_name, MAX_FILE_NAME, "%s/%s", dir_name, dp->d_name); if (stat(file_name, &stat_buf) == -1) { fprintf(stderr, "Couldn't stat file %s", file_name); break; } if (! S_ISDIR(stat_buf.st_mode) && is_number(dp->d_name)) { generate_file(file_name, atoi(dp->d_name)); } } closedir(dirp); }
int main(int argc, char *argv[]) { int file_count, opt; char *opath = NULL; int targetfd; struct file_stripe_info *finfo; while ((opt = getopt(argc, argv, "o:")) != -1) { switch (opt) { case 'o': opath = optarg; break; default: usage(argv[0]); return -1; } } file_count = argc - optind; if (!opath || !file_count) { usage(argv[0]); return -1; } finfo = validate_and_open_files(&argv[optind], file_count); if (!finfo) goto err; targetfd = open(opath, O_RDWR|O_CREAT, finfo->mode); if (targetfd < 0) goto err; if (generate_file(targetfd, finfo) < 0) goto err; if (fsync(targetfd) < 0) fprintf(stderr, "ERROR: %s\n", strerror(errno)); if (close(targetfd) < 0) fprintf(stderr, "ERROR: %s\n", strerror(errno)); close_files(finfo); free(finfo); return 0; err: if (finfo) { close_files(finfo); free(finfo); } return -1; }
int main(int argc, char ** argv) { pid_t pid1, pid2, pid3; int status; pid1 = fork(); if (pid1 == 0) { //child process generate_file(); printf("File created.\n"); exit(EXIT_SUCCESS); } else { //parent process waitpid( pid1, &status, 0); pid1 = fork(); if (pid1 == 0) { //child process execlp("wc", "wc", "-m", "random.txt", (char * ) 0); } else { pid2 = fork(); if (pid2 == 0) { //child process execlp("wc", "wc", "-w", "random.txt", (char *) 0); } else { //parent process pid3 = fork(); if (pid3 == 0) { //child process execl("./average", "average", "random.txt", (char *) 0); } else { // parent process waitpid(pid1, &status, 0); printf("Child %d terminated with status %d\n", pid1, status); waitpid(pid2, &status, 0); printf("Child %d terminated with status %d\n", pid2, status); waitpid(pid3, &status, 0); printf("Child %d terminated with status %d\n", pid3, status); } } } } return 0; }
/** * Main entry point. */ int main(int argc, char** argv) { char* output = argv[1]; char use_define = 1; if (argc < 2) { print_usage(argv[0]); return 1; } else if (argc == 3) { output = argv[2]; } generate_file(argv[1], output, use_define); return 0; }
int main(void) { char picture[ROWS][COLS+1] = {{0}}; srand((unsigned int) time(0)); if(generate_file(FLNM, ROWS, COLS)==ERRGEN) exit(EXIT_FAILURE); if(generate_image(FLNM, (char*)picture, ROWS, COLS)==ERRGEN) exit(EXIT_FAILURE); display_image((char*)picture, ROWS, COLS); if(store_image(IMGNM, (char*)picture, ROWS, COLS)==ERRGEN) exit(EXIT_FAILURE); return 0; }
int main (int argc, char * argv []) { PARAMS params = { 1.0, -1, -1, 0, 0, 0, NULL } ; const char * filename ; int k ; if (argc < 4) usage_exit (argv [0]) ; for (k = 1 ; k < argc - 3 ; k++) { if (strcmp (argv [k], "-from") == 0) { k++ ; params.start_freq = parse_double_or_die (argv [k], "from frequency") ; continue ; } ; if (strcmp (argv [k], "-to") == 0) { k++ ; params.end_freq = parse_double_or_die (argv [k], "to frequency") ; continue ; } ; if (strcmp (argv [k], "-amp") == 0) { k++ ; params.amplitude = strtod (argv [k], NULL) ; continue ; } ; if (argv [k][0] == '-') { params.sweep_func = parse_sweep_type (argv [k]) ; continue ; } ; printf ("\nUnknow option '%s'.\n\n", argv [k]) ; exit (1) ; } ; params.samplerate = parse_int_or_die (argv [argc - 3], "sample rate") ; params.seconds = parse_double_or_die (argv [argc - 2], "seconds") ; filename = argv [argc - 1] ; check_int_range ("sample rate", params.samplerate, 1000, 200 * 1000) ; check_double_range ("seconds", params.seconds, 0.1, 100.0) ; if (params.sweep_func == NULL) params.sweep_func = parse_sweep_type ("-log") ; if (params.start_freq <= 0.0) params.start_freq = 100.0 ; if (params.end_freq <= 0.0) params.end_freq = params.samplerate / 2.0 - 100.0 ; if (params.end_freq <= params.start_freq) { printf ("\nError : end frequency %g < start frequency %g.\n\n", params.end_freq, params.start_freq) ; exit (1) ; } ; params.format = guess_major_format (filename) | SF_FORMAT_FLOAT ; generate_file (filename, ¶ms) ; return 0 ; } /* main */