...stdio.h> #include <stdlib.h> #include <unistd.h> static void usage(char *pname) { fprintf(stderr, "Usage: %s [options] program [arg...]\n", pname); fprintf(stderr, "Options can …...int fd; char *name, *seals_arg; ssize_t len; unsigned int seals; if (argc < 3) { fprintf(stderr, "%s name size [seals]\n", argv[0]); fprintf(stderr, "\t'seals' can contain any o…..."); exit(EXIT_FAILURE); } /* params struct now contains the current parameters */ fprintf(stderr, "epoll usecs: %lu\n", params.busy_poll_usecs); fprintf(stderr, "epoll packet bu…...mtext[80]; }; static void usage(char *prog_name, char *msg) { if (msg != NULL) fputs(msg, stderr); fprintf(stderr, "Usage: %s [options]\n", prog_name); fprintf(stderr, "Options …...mtext[80]; }; static void usage(char *prog_name, char *msg) { if (msg != NULL) fputs(msg, stderr); fprintf(stderr, "Usage: %s [options]\n", prog_name); fprintf(stderr, "Options …...mtext[80]; }; static void usage(char *prog_name, char *msg) { if (msg != NULL) fputs(msg, stderr); fprintf(stderr, "Usage: %s [options]\n", prog_name); fprintf(stderr, "Options …..., fhsize, flags, dirfd; char *pathname; struct file_handle *fhp; if (argc != 2) { fprintf(stderr, "Usage: %s pathname\n", argv[0]); exit(EXIT_FAILURE); } pathname = argv[1]; /* …..., fhsize, flags, dirfd; char *pathname; struct file_handle *fhp; if (argc != 2) { fprintf(stderr, "Usage: %s pathname\n", argv[0]); exit(EXIT_FAILURE); } pathname = argv[1]; /* …...> #include <sys/sem.h> #include <unistd.h> static void usage(const char *pname) { fprintf(stderr, "Usage: %s [-cx] pathname proj-id num-sems\n", pname); fprintf(stderr, " -c Use…...h> int main(int argc, char *argv[]) { int fd; ssize_t len, slen; if (argc != 2) { fprintf(stderr, "Usage: %s <file>\n", argv[0]); exit(EXIT_FAILURE); } fd = open(argv[1], O_WRON…...) { int semid, shmid; char *addr; size_t len; struct sembuf sop; if (argc != 4) { fprintf(stderr, "Usage: %s shmid semid string\n", argv[0]); exit(EXIT_FAILURE); } len = strlen(…...) { int semid, shmid; char *addr; size_t len; struct sembuf sop; if (argc != 4) { fprintf(stderr, "Usage: %s shmid semid string\n", argv[0]); exit(EXIT_FAILURE); } len = strlen(…...) { int semid, shmid; char *addr; size_t len; struct sembuf sop; if (argc != 4) { fprintf(stderr, "Usage: %s shmid semid string\n", argv[0]); exit(EXIT_FAILURE); } len = strlen(…...*argv[]) { int pidfd, sig; char path[PATH_MAX]; siginfo_t info; if (argc != 3) { fprintf(stderr, "Usage: %s <pid> <signal>\n", argv[0]); exit(EXIT_FAILURE); } sig = atoi(argv[2]…...y = AF_INET; if (!inet_aton(address, (struct in_addr *) &addr.sin_addr.s_addr)) { fprintf(stderr, "inet_aton(): bad IP address format\n"); close(cfd); return -1; } if (connect(c…...nt argc, char *argv[]) { int pidfd, ready; struct pollfd pollfd; if (argc != 2) { fprintf(stderr, "Usage: %s <pid>\n", argv[0]); exit(EXIT_SUCCESS); } pidfd = pidfd_open(atoi(ar…...rs before exec File descriptors can be closed safely using /* we don't want anything past stderr here */ close_range(3, ~0U, CLOSE_RANGE_UNSHARE); execve(....); CLOSE_RANGE_UNSH…...ar *argv[]) { char *buf; ssize_t nbytes, bufsiz; struct stat sb; if (argc != 2) { fprintf(stderr, "Usage: %s <pathname>\n", argv[0]); exit(EXIT_FAILURE); } if (lstat(argv[1], &s…...ar *argv[]) { char *buf; ssize_t nbytes, bufsiz; struct stat sb; if (argc != 2) { fprintf(stderr, "Usage: %s <pathname>\n", argv[0]); exit(EXIT_FAILURE); } if (lstat(argv[1], &s…...n(int argc, char *argv[]) { int pipefd[2]; char buf; pid_t cpid; if (argc != 2) { fprintf(stderr, "Usage: %s <string>\n", argv[0]); exit(EXIT_FAILURE); } if (pipe(pipefd) == -1)…