static void proc_forkwait(struct proc *p, const char *file, char **argv) { int retryEINTR = 0, retryEAGAIN = 0; pid_t pid; restart: switch(pid = fork()) { case -1: switch(errno) { case EINTR: if (++retryEINTR > NPROC + 1) { _log_fork(LOG_INFO, errno, file); } goto restart; case EAGAIN: if (++retryEAGAIN <= RETRY_SYSCALL) { _log_fork(LOG_INFO, errno, file); pause_syscall(retryEAGAIN); goto restart; } /* down seems more likely */ default: die_fork(errno, file); } case 0: proc_child(p, file, argv); default: p->pid = pid; proc_parent(p); } }
void doanddie(char *user, unsigned int userlen /* including 0 byte */, char *pass) { int child; int wstat; int pi[2]; close(3); if (pipe(pi) == -1) die_pipe(); if (pi[0] != 3) die_pipe(); switch(child = fork()) { case -1: die_fork(); case 0: close(pi[1]); sig_pipedefault(); execvp(*childargs,childargs); _exit(1); } close(pi[0]); substdio_fdbuf(&ssup,subwrite,pi[1],upbuf,sizeof upbuf); if (substdio_put(&ssup,user,userlen) == -1) die_write(); if (substdio_put(&ssup,pass,str_len(pass) + 1) == -1) die_write(); if (substdio_puts(&ssup,"<") == -1) die_write(); if (substdio_puts(&ssup,unique) == -1) die_write(); if (substdio_puts(&ssup,hostname) == -1) die_write(); if (substdio_put(&ssup,">",2) == -1) die_write(); if (substdio_flush(&ssup) == -1) die_write(); close(pi[1]); byte_zero(pass,str_len(pass)); byte_zero(upbuf,sizeof upbuf); if (wait_pid(&wstat,child) == -1) die(); if (wait_crashed(wstat)) die_childcrashed(); switch (wait_exitcode(wstat)) { case 0: die(); case 1: die_1(); case 2: die_2(); case 25: die_25(); case 3: die_3(); case 4: die_4(); case 5: die_5(); case 6: die_6(); case 61: die_61(); case 62: die_62(); case 7: die_7(); case 8: die_nomem(); default: die_unknown(); } die(); }