//將sendmail程序的功能復(fù)制到mta程序中

#include "sgetopt.h"#include "substdio.h"#include "subfd.h"#include "alloc.h"#include "auto_qmail.h"#include "exit.h"#include "env.h"#include "str.h"void nomem(){  substdio_putsflush(subfderr,"sendmail: fatal: out of memory\n");  _exit(111);}void die_usage(){  substdio_putsflush(subfderr,"sendmail: usage: sendmail [ -t ] [ -fsender ] [ -Fname ] [ -bp ] [ -bs ] [ arg ... ]\n");  _exit(100);}char *smtpdarg[] = { "bin/qmail-smtpd", 0 };void smtpd(){  if (!env_get("PROTO")) {    if (!env_put("RELAYCLIENT=")) nomem();    if (!env_put("DATABYTES=0")) nomem();    if (!env_put("PROTO=TCP")) nomem();    if (!env_put("TCPLOCALIP=127.0.0.1")) nomem();    if (!env_put("TCPLOCALHOST=localhost")) nomem();    if (!env_put("TCPREMOTEIP=127.0.0.1")) nomem();    if (!env_put("TCPREMOTEHOST=localhost")) nomem();    if (!env_put("TCPREMOTEINFO=sendmail-bs")) nomem();  }  execv(*smtpdarg,smtpdarg);  substdio_putsflush(subfderr,"sendmail: fatal: unable to run qmail-smtpd\n");  _exit(111);}char *qreadarg[] = { "bin/qmail-qread", 0 };void mailq(){  execv(*qreadarg,qreadarg);  substdio_putsflush(subfderr,"sendmail: fatal: unable to run qmail-qread\n");  _exit(111);}int flagh;char *sender;void main(argc,argv)int argc;char **argv;{  int opt;  char **qiargv;  char **arg;  int i;   if (chdir(auto_qmail) == -1) {    substdio_putsflush(subfderr,"sendmail: fatal: unable to switch to qmail home directory\n");    _exit(111);  }  flagh = 0;  sender = 0;  while ((opt = getopt(argc,argv,"vimte:f:p:o:B:F:EJxb:")) != opteof)    switch(opt) {      case 'B': break;      case 't': flagh = 1; break;      case 'f': sender = optarg; break;      case 'F': if (!env_put2("MAILNAME",optarg)) nomem(); break;      case 'p': break; /* could generate a Received line from optarg */      case 'v': break;      case 'i': break; /* what an absurd concept */      case 'x': break; /* SVR4 stupidity */      case 'm': break; /* twisted-paper-path blindness, incompetent design */      case 'e': break; /* qmail has only one error mode */      case 'o':        switch(optarg[0]) {	  case 'd': break; /* qmail has only one delivery mode */	  case 'e': break; /* see 'e' above */	  case 'i': break; /* see 'i' above */	  case 'm': break; /* see 'm' above */	}        break;      case 'E': case 'J': /* Sony NEWS-OS */        while (argv[optind][optpos]) ++optpos; /* skip optional argument */        break;      case 'b':	switch(optarg[0]) {	  case 'm': break;	  case 'p': mailq();	  case 's': smtpd();	  default: die_usage();	}	break;      default:	die_usage();    }  argc -= optind;  argv += optind;   if (str_equal(optprogname,"mailq"))    mailq();  if (str_equal(optprogname,"newaliases")) {    substdio_putsflush(subfderr,"sendmail: fatal: please use fastforward/newaliases instead\n");    _exit(100);  }  qiargv = (char **) alloc((argc + 10) * sizeof(char *));  if (!qiargv) nomem();   arg = qiargv;  *arg++ = "bin/qmail-inject";  *arg++ = (flagh ? "-H" : "-a");  if (sender) {    *arg++ = "-f";    *arg++ = sender;  }  *arg++ = "--";  for (i = 0;i < argc;++i) *arg++ = argv[i];  *arg = 0;   execv(*qiargv,qiargv);  substdio_putsflush(subfderr,"sendmail: fatal: unable to run qmail-inject\n");  _exit(111);}