87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
#include "sig.h"
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#include "readwrite.h"
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#include "exit.h"
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#include "env.h"
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#include "error.h"
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#include "fork.h"
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#include "wait.h"
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#include "seek.h"
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#include "qmail.h"
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#include "stralloc.h"
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#include "subfd.h"
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#include "substdio.h"
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void die_success() { _exit(0); }
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void die_99() { _exit(99); }
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void die_perm(s) char *s; { substdio_putsflush(subfderr,s); _exit(100); }
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void die_temp(s) char *s; { substdio_putsflush(subfderr,s); _exit(111); }
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void die_nomem() { die_temp("condredirect: fatal: out of memory\n"); }
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struct qmail qqt;
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int mywrite(fd,buf,len) int fd; char *buf; int len;
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{
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qmail_put(&qqt,buf,len);
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return len;
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}
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substdio ssin;
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substdio ssout;
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char inbuf[SUBSTDIO_INSIZE];
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char outbuf[16];
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void main(argc,argv)
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int argc;
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char **argv;
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{
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char *sender;
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char *dtline;
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int pid;
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int wstat;
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if (!argv[1] || !argv[2])
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die_perm("condredirect: usage: condredirect newaddress program arg ...\n");
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switch(pid = fork())
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{
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case -1: die_temp("condredirect: fatal: unable to fork\n");
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case 0:
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execvp(argv[2],argv + 2);
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if (error_temp(errno)) _exit(111);
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_exit(100);
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}
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if (wait_pid(&wstat,pid) != pid)
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die_perm("condredirect: fatal: internal bug\n");
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if (wait_crashed(wstat)) die_temp("condredirect: fatal: child crashed\n");
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switch(wait_exitcode(wstat))
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{
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case 0: break;
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case 111: die_temp("condredirect: fatal: temporary child error\n");
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default: die_success();
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}
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if (seek_begin(0) == -1) die_temp("condredirect: fatal: unable to rewind\n");
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sig_pipeignore();
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sender = env_get("SENDER");
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if (!sender) die_perm("condredirect: fatal: SENDER not set\n");
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dtline = env_get("DTLINE");
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if (!dtline) die_perm("condredirect: fatal: DTLINE not set\n");
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if (qmail_open(&qqt) == -1) die_temp("condredirect: fatal: unable to fork\n");
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qmail_puts(&qqt,dtline);
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substdio_fdbuf(&ssin,read,0,inbuf,sizeof(inbuf));
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substdio_fdbuf(&ssout,mywrite,-1,outbuf,sizeof(outbuf));
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if (substdio_copy(&ssout,&ssin) != 0)
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die_temp("condredirect: fatal: error while reading message\n");
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substdio_flush(&ssout);
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qmail_from(&qqt,sender);
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qmail_to(&qqt,argv[1]);
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switch(qmail_close(&qqt))
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{
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case 0: die_99();
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case QMAIL_TOOLONG: die_perm("condredirect: fatal: permanent qmail-queue error\n");
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default: die_temp("condredirect: fatal: temporary qmail-queue error\n");
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}
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}
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