13 #define FATAL "preline: fatal: "
17 strerr_die1x(100,"preline: usage: preline cmd [ arg ... ]");
20 int flagufline = 1; char *ufline;
21 int flagrpline = 1; char *rpline;
22 int flagdtline = 1; char *dtline;
24 char outbuf[SUBSTDIO_OUTSIZE];
25 char inbuf[SUBSTDIO_INSIZE];
26 substdio ssout = SUBSTDIO_FDBUF(write,1,outbuf,sizeof outbuf);
27 substdio ssin = SUBSTDIO_FDBUF(read,0,inbuf,sizeof inbuf);
40 if (!(ufline = env_get("UFLINE"))) die_usage();
41 if (!(rpline = env_get("RPLINE"))) die_usage();
42 if (!(dtline = env_get("DTLINE"))) die_usage();
44 while ((opt = getopt(argc,argv,"frdFRD")) != opteof)
46 case 'f': flagufline = 0; break;
47 case 'r': flagrpline = 0; break;
48 case 'd': flagdtline = 0; break;
49 case 'F': flagufline = 1; break;
50 case 'R': flagrpline = 1; break;
51 case 'D': flagdtline = 1; break;
56 if (!*argv) die_usage();
59 strerr_die2sys(111,FATAL,"unable to create pipe: ");
63 strerr_die2sys(111,FATAL,"unable to fork: ");
67 if (fd_move(0,pi[0]) == -1)
68 strerr_die2sys(111,FATAL,"unable to set up fds: ");
71 strerr_die4sys(error_temp(errno) ? 111 : 100,FATAL,"unable to run ",*argv,": ");
74 if (fd_move(1,pi[1]) == -1)
75 strerr_die2sys(111,FATAL,"unable to set up fds: ");
77 if (flagufline) substdio_bputs(&ssout,ufline);
78 if (flagrpline) substdio_bputs(&ssout,rpline);
79 if (flagdtline) substdio_bputs(&ssout,dtline);
80 if (substdio_copy(&ssout,&ssin) != 0)
81 strerr_die2sys(111,FATAL,"unable to copy input: ");
82 substdio_flush(&ssout);
85 if (wait_pid(&wstat,pid) == -1)
86 strerr_die2sys(111,FATAL,"wait failed: ");
87 if (wait_crashed(wstat))
88 strerr_die2x(111,FATAL,"child crashed");
89 _exit(wait_exitcode(wstat));