qmail-recipients.c

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#include <unistd.h>
#include <sys/stat.h>
#include "logmsg.h"
#include "stralloc.h"
#include "buffer.h"
#include "getln.h"
#include "exit.h"
#include "open.h"
#include "case.h"
#include "auto_qmail.h"
#include "cdbmake.h"
 
#define WHO "qmail-recipients"
 
int rename(const char *,const char *); // stdio.h
 
void die_read()
{
  logmsg(WHO,111,ERROR,"unable to read users/recipients");
}
void die_write()
{
  logmsg(WHO,111,ERROR,"unable to write to users/recipients.tmp");
}
 
char inbuf[1024];
buffer b;
 
int fd;
int fdtemp;
 
struct cdb_make cdb;
stralloc line = {0};
stralloc key  = {0};
int match;
 
int main()
{
  umask(033);
  if (chdir(auto_qmail) == -1)
    logmsg(WHO,110,ERROR,B("unable to chdir to: ",auto_qmail));
 
  fd = open_read("users/recipients");
  if (fd == -1) die_read();
 
  buffer_init(&b,read,fd,inbuf,sizeof(inbuf));
 
  fdtemp = open_trunc("users/recipients.tmp");
  if (fdtemp == -1) die_write();
 
  if (cdb_make_start(&cdb,fdtemp) == -1) die_write();
 
  for (;;) {
    stralloc_copys(&key,":");
    if (getln(&b,&line,&match,'\n') != 0) die_read();
    while (line.len) {
      if (line.s[line.len - 1] == ' ') { --line.len; continue; }
      if (line.s[line.len - 1] == '\n') { --line.len; continue; }
      if (line.s[line.len - 1] == '\t') { --line.len; continue; }
      if (line.s[0] != '#' && stralloc_cat(&key,&line)) {
        case_lowerb(key.s,key.len);
        if (cdb_make_add(&cdb,key.s,key.len,"",0) == -1)
          die_write();
      }
      break;
    }
    if (!match) break;
  }
 
  if (cdb_make_finish(&cdb) == -1) die_write();
  if (fsync(fdtemp) == -1) die_write();
  if (close(fdtemp) == -1) die_write(); /* NFS stupidity */
  if (rename("users/recipients.tmp","users/recipients.cdb") == -1)
    logmsg(WHO,111,ERROR,"unable to move users/recipients.tmp to users/recipients.cdb");
 
  _exit(0);
}