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#include "apue.h" int glob = 6; /* external variable in initialized data */ char buf[] = "a write to stdout\n"; int main(void) { int var; /* automatic variable on the stack */ pid_t pid; var

#include "apue.h" #include static void sig_cld(int); int main() { pid_t pid; if (signal(SIGCLD, sig_cld) == SIG_ERR) perror("signal error"); if ((pid = fork()) < 0) { perror("fo

#include "apue.h" #include #include #include void daemonize(const char *cmd) { int i, fd0, fd1, fd2; pid_t pid; struct rlimit rl; struct sigaction sa

#include "apue.h" #include int main(void) { pid_t pid; int status; if ((pid = fork()) < 0) err_sys("fork error"); else if (pid == 0) /* child */ exit(7); if (wait(&status)

#include "apue.h" int main(void) { int n; int fd[2]; pid_t pid; char line[MAXLINE]; if (pipe(fd) < 0) err_sys("pipe error"); if ((pid = fork()) < 0) { err_sys("fork error"); } else if (

#include "apue.h" #include static void sig_hup(int signo) { printf("SIGHUP received, pid = %d\n", getpid()); } static void pr_ids(char *name) { printf("%s: pid = %d, ppid = %d, pgrp = %d

#include #include #include int system(const char *cmdstring) /* version without signal handling */ { pid_t pid; int status; if (cmdstring == NULL) return(1);

#include "apue.h" static void f1(void), f2(void); int main(void) { f1(); f2(); _exit(0); } static void f1(void) { pid_t pid; if ((pid = vfork()) < 0) err_sys("vfork error"); /* child and p

#include "apue.h" #include char *env_init[] = { "USER=unknown", "PATH=/tmp", NULL }; int main(void) { pid_t pid; if ((pid = fork()) < 0) { err_sys("fork error"); } else if (pid ==

#include "apue.h" #include static void sig_int(int); /* our signal-catching function */ int main(void) { char buf[MAXLINE]; /* from apue.h */ pid_t pid; int status; if (signal(SI