| 1 | #include "sig.h" |
| 2 | #include "readwrite.h" |
| 3 | #include "exit.h" |
| 4 | #include "env.h" |
| 5 | #include "error.h" |
| 6 | #include "fork.h" |
| 7 | #include "wait.h" |
| 8 | #include "seek.h" |
| 9 | #include "qmail.h" |
| 10 | #include "stralloc.h" |
| 11 | #include "subfd.h" |
| 12 | #include "substdio.h" |
| 13 | |
| 14 | void die_success() { _exit(0); } |
| 15 | void die_99() { _exit(99); } |
| 16 | void die_perm(s) char *s; { substdio_putsflush(subfderr,s); _exit(100); } |
| 17 | void die_temp(s) char *s; { substdio_putsflush(subfderr,s); _exit(111); } |
| 18 | void die_nomem() { die_temp("condredirect: fatal: out of memory\n"); } |
| 19 | |
| 20 | struct qmail qqt; |
| 21 | |
| 22 | int mywrite(fd,buf,len) int fd; char *buf; int len; |
| 23 | { |
| 24 | qmail_put(&qqt,buf,len); |
| 25 | return len; |
| 26 | } |
| 27 | |
| 28 | substdio ssin; |
| 29 | substdio ssout; |
| 30 | char inbuf[SUBSTDIO_INSIZE]; |
| 31 | char outbuf[16]; |
| 32 | |
| 33 | void main(argc,argv) |
| 34 | int argc; |
| 35 | char **argv; |
| 36 | { |
| 37 | char *sender; |
| 38 | char *dtline; |
| 39 | int pid; |
| 40 | int wstat; |
| 41 | |
| 42 | if (!argv[1] || !argv[2]) |
| 43 | die_perm("condredirect: usage: condredirect newaddress program arg ...\n"); |
| 44 | |
| 45 | switch(pid = fork()) |
| 46 | { |
| 47 | case -1: die_temp("condredirect: fatal: unable to fork\n"); |
| 48 | case 0: |
| 49 | execvp(argv[2],argv + 2); |
| 50 | if (error_temp(errno)) _exit(111); |
| 51 | _exit(100); |
| 52 | } |
| 53 | if (wait_pid(&wstat,pid) != pid) |
| 54 | die_perm("condredirect: fatal: internal bug\n"); |
| 55 | if (wait_crashed(wstat)) die_temp("condredirect: fatal: child crashed\n"); |
| 56 | switch(wait_exitcode(wstat)) |
| 57 | { |
| 58 | case 0: break; |
| 59 | case 111: die_temp("condredirect: fatal: temporary child error\n"); |
| 60 | default: die_success(); |
| 61 | } |
| 62 | |
| 63 | if (seek_begin(0) == -1) die_temp("condredirect: fatal: unable to rewind\n"); |
| 64 | sig_pipeignore(); |
| 65 | |
| 66 | sender = env_get("SENDER"); |
| 67 | if (!sender) die_perm("condredirect: fatal: SENDER not set\n"); |
| 68 | dtline = env_get("DTLINE"); |
| 69 | if (!dtline) die_perm("condredirect: fatal: DTLINE not set\n"); |
| 70 | |
| 71 | if (qmail_open(&qqt) == -1) die_temp("condredirect: fatal: unable to fork\n"); |
| 72 | qmail_puts(&qqt,dtline); |
| 73 | substdio_fdbuf(&ssin,read,0,inbuf,sizeof(inbuf)); |
| 74 | substdio_fdbuf(&ssout,mywrite,-1,outbuf,sizeof(outbuf)); |
| 75 | if (substdio_copy(&ssout,&ssin) != 0) |
| 76 | die_temp("condredirect: fatal: error while reading message\n"); |
| 77 | substdio_flush(&ssout); |
| 78 | |
| 79 | qmail_from(&qqt,sender); |
| 80 | qmail_to(&qqt,argv[1]); |
| 81 | switch(qmail_close(&qqt)) |
| 82 | { |
| 83 | case 0: die_99(); |
| 84 | case QMAIL_TOOLONG: die_perm("condredirect: fatal: permanent qmail-queue error\n"); |
| 85 | default: die_temp("condredirect: fatal: temporary qmail-queue error\n"); |
| 86 | } |
| 87 | } |