generic-conf.c

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#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "logmsg.h"
#include "buffer.h"
#include "open.h"
#include "generic-conf.h"
 
static const char *fatal;
static const char *dir;
static const char *fn;
 
static int fd;
static char buf[1024];
static buffer ss;
 
void init(const char *d,const char *f)
{
  dir = d;
  fatal = f;
  umask(022);
  if (mkdir(dir,0700) == -1)
    logmsg(fatal,111,FATAL,B("unable to create: ",dir));
  if (chmod(dir,03755) == -1)
    logmsg(fatal,111,FATAL,B("unable to set mode of: ",dir));
  if (chdir(dir) == -1)
    logmsg(fatal,111,FATAL,B("unable to switch to: ",dir));
}
 
void fail(void)
{
  logmsg(fatal,111,FATAL,B("unable to create: ",dir,"/",fn));
}
 
void makedir(const char *s)
{
  fn = s;
  if (mkdir(fn,0700) == -1) fail();
}
 
void start(const char *s)
{
  fn = s;
  fd = open_trunc(fn);
  if (fd == -1) fail();
  buffer_init(&ss,buffer_unixwrite,fd,buf,sizeof(buf));
}
 
void outs(const char *s)
{
  if (buffer_puts(&ss,s) == -1) fail();
}
 
void out(const char *s,unsigned int len)
{
  if (buffer_put(&ss,s,len) == -1) fail();
}
 
void copyfrom(buffer *b)
{
  if (buffer_copy(&ss,b) < 0) fail();
}
 
void finish(void)
{
  if (buffer_flush(&ss) == -1) fail();
  if (fsync(fd) == -1) fail();
  close(fd);
}
 
void perm(int mode)
{
  if (chmod(fn,mode) == -1) fail();
}
 
void owner(int uid,int gid)
{
  if (chown(fn,uid,gid) == -1) fail();
}
 
void makelog(const char *user,int uid,int gid)
{
  makedir("log");
  perm(02755);
  makedir("log/main");
  owner(uid,gid);
  perm(02755);
  start("log/status");
  finish();
  owner(uid,gid);
  perm(0644);
 
  start("log/run");
  outs("#!/bin/sh\nexec");
  outs(" setuidgid "); outs(user);
  outs(" multilog t ./main\n");
  finish();
  perm(0755);
}