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#include "imap4d.h"
static Mblock mblck = {
.fd = -1
};
static char curdir[Pathlen];
void
resetcurdir(void)
{
curdir[0] = 0;
}
int
mychdir(char *dir)
{
if(strcmp(dir, curdir) == 0)
return 0;
if(dir[0] != '/' || strlen(dir) > Pathlen)
return -1;
strcpy(curdir, dir);
if(chdir(dir) < 0){
werrstr("mychdir failed: %r");
return -1;
}
return 0;
}
int
cdcreate(char *dir, char *file, int mode, ulong perm)
{
if(mychdir(dir) < 0)
return -1;
return create(file, mode, perm);
}
Dir*
cddirstat(char *dir, char *file)
{
if(mychdir(dir) < 0)
return nil;
return dirstat(file);
}
int
cdexists(char *dir, char *file)
{
Dir *d;
d = cddirstat(dir, file);
if(d == nil)
return 0;
free(d);
return 1;
}
int
cddirwstat(char *dir, char *file, Dir *d)
{
if(mychdir(dir) < 0)
return -1;
return dirwstat(file, d);
}
int
cdopen(char *dir, char *file, int mode)
{
if(mychdir(dir) < 0)
return -1;
return open(file, mode);
}
int
cdremove(char *dir, char *file)
{
if(mychdir(dir) < 0)
return -1;
return remove(file);
}
/*
* open the one true mail lock file
*/
Mblock*
mblock(void)
{
if(mblck.fd >= 0)
bye("mail lock deadlock");
mblck.fd = openlocked(mboxdir, "L.mbox", OREAD);
if(mblck.fd >= 0)
return &mblck;
ilog("mblock: %r");
return nil;
}
void
mbunlock(Mblock *ml)
{
if(ml != &mblck)
bye("bad mail unlock");
if(ml->fd < 0)
bye("mail unlock when not locked");
close(ml->fd);
ml->fd = -1;
}
void
mblockrefresh(Mblock *ml)
{
char buf[1];
seek(ml->fd, 0, 0);
read(ml->fd, buf, 1);
}
int
mblocked(void)
{
return mblck.fd >= 0;
}
char*
impname(char *name)
{
char *s, buf[Pathlen];
int n;
encfs(buf, sizeof buf, name);
n = strlen(buf) + STRLEN(".imp") + 1;
s = binalloc(&parsebin, n, 0);
if(s == nil)
return nil;
snprint(s, n, "%s.imp", name);
return s;
}
/*
* massage the mailbox name into something valid
* eliminates all .', and ..',s, redundatant and trailing /'s.
*/
char *
mboxname(char *s)
{
char *ss, *p;
ss = mutf7str(s);
if(ss == nil)
return nil;
cleanname(ss);
if(!okmbox(ss))
return nil;
p = binalloc(&parsebin, Pathlen, 0);
return encfs(p, Pathlen, ss);
}
char*
strmutf7(char *s)
{
char *m;
int n;
n = strlen(s) * Mutf7max + 1;
m = binalloc(&parsebin, n, 0);
if(m == nil)
return nil;
return encmutf7(m, n, s);
}
char*
mutf7str(char *s)
{
char *m;
int n;
/*
* n = strlen(s) * UTFmax / (2.67) + 1
* UTFmax / 2.67 == 3 / (8/3) == 9 / 8
*/
n = strlen(s);
n = (n * 9 + 7) / 8 + 1;
m = binalloc(&parsebin, n, 0);
if(m == nil)
return nil;
return decmutf7(m, n, s);
}
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