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#include "fd.h"
#include "stralloc.h"
#include "readwrite.h"
#include "sgetopt.h"
#include "wait.h"
#include "env.h"
#include "byte.h"
#include "str.h"
#include "alloc.h"
#include "exit.h"
#include "fork.h"
#include "case.h"
#include "subfd.h"
#include "error.h"
#include "substdio.h"
#include "sig.h"
void die(e,s) int e; char *s; { substdio_putsflush(subfderr,s); _exit(e); }
void die_usage() { die(100,"qsmhook: fatal: incorrect usage\n"); }
void die_temp() { die(111,"qsmhook: fatal: temporary problem\n"); }
void die_read() { die(111,"qsmhook: fatal: unable to read message\n"); }
void die_badcmd() { die(100,"qsmhook: fatal: command not found\n"); }
int flagrpline = 0; char *rpline;
int flagufline = 1; char *ufline;
int flagdtline = 0; char *dtline;
char *host;
char *sender;
char *recip;
stralloc newarg = {0};
substdio ssout;
char outbuf[SUBSTDIO_OUTSIZE];
substdio ssin;
char inbuf[SUBSTDIO_INSIZE];
void main(argc,argv)
int argc;
char **argv;
{
int pid;
int wstat;
int pi[2];
int opt;
char **arg;
char *x;
int i;
int flagesc;
sig_pipeignore();
if (!(dtline = env_get("DTLINE"))) die_usage();
if (!(rpline = env_get("RPLINE"))) die_usage();
if (!(ufline = env_get("UFLINE"))) die_usage();
if (!(recip = env_get("LOCAL"))) die_usage();
if (!(host = env_get("HOST"))) die_usage();
if (!(sender = env_get("SENDER"))) die_usage();
while ((opt = getopt(argc,argv,"DFlMmnPsx:")) != opteof)
switch(opt)
{
case 'D': case 'F': case 'M': break; /* be serious */
case 'l': flagdtline = 1; break; /* also return-receipt-to? blech */
case 'm': break; /* we only handle one recipient anyway */
case 'n': flagufline = 0; break;
case 's': break; /* could call quote() otherwise, i suppose... */
case 'P': flagrpline = 1; break;
case 'x':
if (case_starts(recip,optarg))
recip += str_len(optarg);
break;
default:
_exit(100);
}
argc -= optind;
argv += optind;
if (!*argv) die_usage();
for (arg = argv;x = *arg;++arg)
{
if (!stralloc_copys(&newarg,"")) die_temp();
flagesc = 0;
for (i = 0;x[i];++i)
if (flagesc)
{
switch(x[i])
{
case '%': if (!stralloc_cats(&newarg,"%")) die_temp(); break;
case 'g': if (!stralloc_cats(&newarg,sender)) die_temp(); break;
case 'h': if (!stralloc_cats(&newarg,host)) die_temp(); break;
case 'u': if (!stralloc_cats(&newarg,recip)) die_temp(); break;
}
flagesc = 0;
}
else
if (x[i] == '%')
flagesc = 1;
else
if (!stralloc_append(&newarg,&x[i])) die_temp();
if (!stralloc_0(&newarg)) die_temp();
i = str_len(newarg.s) + 1;
if (!(x = alloc(i))) die_temp();
byte_copy(x,i,newarg.s);
*arg = x;
}
if (pipe(pi) == -1) die_temp();
switch(pid = fork())
{
case -1:
die_temp();
case 0:
close(pi[1]);
if (fd_move(0,pi[0]) == -1) die_temp();
sig_pipedefault();
execvp(*argv,argv);
if (error_temp(errno)) die_temp();
die_badcmd();
}
close(pi[0]);
substdio_fdbuf(&ssout,write,pi[1],outbuf,sizeof(outbuf));
substdio_fdbuf(&ssin,read,0,inbuf,sizeof(inbuf));
if (flagufline) substdio_bputs(&ssout,ufline);
if (flagrpline) substdio_bputs(&ssout,rpline);
if (flagdtline) substdio_bputs(&ssout,dtline);
if (substdio_copy(&ssout,&ssin) == -2) die_read();
substdio_flush(&ssout);
close(pi[1]);
if (wait_pid(&wstat,pid) == -1) die_temp();
if (wait_crashed(wstat)) die_temp();
_exit(wait_exitcode(wstat));
}
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