ref: 1d891d163e814a93ee5346cf05b4fac297bf3a5c
dir: /sys/src/ape/lib/ap/plan9/system.c/
#include "lib.h" #include <stdlib.h> #include <stdio.h> #include <sys/wait.h> #include <unistd.h> int system(const char *s) { int w, status; pid_t pid; char cmd[30], *oty; oty = getenv("cputype"); if(!oty) return -1; if(!s) return 1; /* a command interpreter is available */ pid = fork(); snprintf(cmd, sizeof cmd, "/%s/bin/ape/sh", oty); if(pid == 0) { execl(cmd, "sh", "-c", s, NULL); _exit(1); } if(pid < 0){ _syserrno(); return -1; } for(;;) { w = wait(&status); if(w == -1 || w == pid) break; } if(w == -1){ _syserrno(); return w; } return status; }