Commit | Line | Data |
---|---|---|
2117e02e MW |
1 | #include "fd.h" |
2 | #include "sgetopt.h" | |
3 | #include "readwrite.h" | |
212b6f5d | 4 | #include "strerr.h" |
2117e02e MW |
5 | #include "substdio.h" |
6 | #include "exit.h" | |
7 | #include "fork.h" | |
8 | #include "wait.h" | |
9 | #include "env.h" | |
10 | #include "sig.h" | |
11 | #include "error.h" | |
12 | ||
212b6f5d MW |
13 | #define FATAL "preline: fatal: " |
14 | ||
15 | void die_usage() | |
16 | { | |
17 | strerr_die1x(100,"preline: usage: preline cmd [ arg ... ]"); | |
18 | } | |
2117e02e MW |
19 | |
20 | int flagufline = 1; char *ufline; | |
21 | int flagrpline = 1; char *rpline; | |
22 | int flagdtline = 1; char *dtline; | |
23 | ||
2117e02e | 24 | char outbuf[SUBSTDIO_OUTSIZE]; |
2117e02e | 25 | char inbuf[SUBSTDIO_INSIZE]; |
212b6f5d MW |
26 | substdio ssout = SUBSTDIO_FDBUF(write,1,outbuf,sizeof outbuf); |
27 | substdio ssin = SUBSTDIO_FDBUF(read,0,inbuf,sizeof inbuf); | |
2117e02e MW |
28 | |
29 | void main(argc,argv) | |
30 | int argc; | |
31 | char **argv; | |
32 | { | |
212b6f5d MW |
33 | int opt; |
34 | int pi[2]; | |
35 | int pid; | |
36 | int wstat; | |
37 | ||
38 | sig_pipeignore(); | |
39 | ||
40 | if (!(ufline = env_get("UFLINE"))) die_usage(); | |
41 | if (!(rpline = env_get("RPLINE"))) die_usage(); | |
42 | if (!(dtline = env_get("DTLINE"))) die_usage(); | |
43 | ||
44 | while ((opt = getopt(argc,argv,"frdFRD")) != opteof) | |
45 | switch(opt) { | |
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; | |
52 | default: die_usage(); | |
2117e02e | 53 | } |
212b6f5d MW |
54 | argc -= optind; |
55 | argv += optind; | |
56 | if (!*argv) die_usage(); | |
57 | ||
58 | if (pipe(pi) == -1) | |
59 | strerr_die2sys(111,FATAL,"unable to create pipe: "); | |
2117e02e | 60 | |
212b6f5d MW |
61 | pid = fork(); |
62 | if (pid == -1) | |
63 | strerr_die2sys(111,FATAL,"unable to fork: "); | |
2117e02e | 64 | |
212b6f5d MW |
65 | if (pid == 0) { |
66 | close(pi[1]); | |
67 | if (fd_move(0,pi[0]) == -1) | |
68 | strerr_die2sys(111,FATAL,"unable to set up fds: "); | |
69 | sig_pipedefault(); | |
70 | execvp(*argv,argv); | |
71 | strerr_die4sys(error_temp(errno) ? 111 : 100,FATAL,"unable to run ",*argv,": "); | |
2117e02e | 72 | } |
212b6f5d MW |
73 | close(pi[0]); |
74 | if (fd_move(1,pi[1]) == -1) | |
75 | strerr_die2sys(111,FATAL,"unable to set up fds: "); | |
76 | ||
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); | |
83 | close(1); | |
84 | ||
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)); | |
2117e02e | 90 | } |