ref: acc58dfee42368825f7595d63240fd6e88559776
dir: /utils/acid/os-Plan9.c/
/* * Plan9 */ #include <lib9.h> #include <bio.h> #include <ctype.h> #include "mach.h" #define Extern extern #include "acid.h" int opentty(char *tty, int baud) { int fd, cfd; char ctty[100]; if(tty == 0) tty = "/dev/eia0"; sprint(ctty, "%sctl", tty); fd = open(tty, 2); if(fd < 0) return -1; if(baud){ cfd = open(ctty, 1); if(cfd < 0) return fd; fprint(cfd, "b%d", baud); close(cfd); } return fd; } void detach(void) { rfork(RFNAMEG|RFNOTEG|RFREND); } char * waitfor(int pid) { Waitmsg *w; static char buf[ERRMAX]; for(;;) { w = wait(); if(w == nil) error("wait %r"); if(w->pid == pid){ strecpy(buf, buf+ERRMAX, w->msg); free(w); return buf; } free(w); } /* not reached */ } char * runcmd(char *cmd) { char *argv[4]; int pid; argv[0] = "/bin/rc"; argv[1] = "-c"; argv[2] = cmd; argv[3] = 0; pid = fork(); switch(pid) { case -1: error("fork %r"); case 0: exec("/bin/rc", argv); exits(0); default: return waitfor(pid); } /* not reached */ } void catcher(void *junk, char *s) { USED(junk); if(strstr(s, "interrupt")) { gotint = 1; noted(NCONT); } noted(NDFLT); } void (*notefunc)(void *, char *); void setup_os_notify(void) { notify(catcher); } int nproc(char **argv) { char buf[128]; int pid, i, fd; pid = fork(); switch(pid) { case -1: error("new: fork %r"); case 0: rfork(RFNAMEG|RFNOTEG); sprint(buf, "/proc/%d/ctl", getpid()); fd = open(buf, ORDWR); if(fd < 0) fatal("new: open %s: %r", buf); write(fd, "hang", 4); close(fd); close(0); close(1); close(2); for(i = 3; i < NFD; i++) close(i); open("/dev/cons", OREAD); open("/dev/cons", OWRITE); open("/dev/cons", OWRITE); exec(argv[0], argv); fatal("new: exec %s: %r"); default: install(pid); msg(pid, "waitstop"); notes(pid); sproc(pid); dostop(pid); break; } return pid; } int remote_read(int fd, char *buf, int bytes) { return read(fd, buf, bytes); } int remote_write(int fd, char *buf, int bytes) { return write(fd, buf, bytes); }