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#include "imap4d.h"
/*
* reverse string [s:e) in place
*/
void
strrev(char *s, char *e)
{
int c;
while(--e > s){
c = *s;
*s++ = *e;
*e = c;
}
}
int
isdotdot(char *s)
{
return s[0] == '.' && s[1] == '.' && (s[2] == '/' || s[2] == 0);
}
int
issuffix(char *suf, char *s)
{
int n;
n = strlen(s) - strlen(suf);
if(n < 0)
return 0;
return strcmp(s + n, suf) == 0;
}
int
isprefix(char *pre, char *s)
{
return strncmp(pre, s, strlen(pre)) == 0;
}
char*
readfile(int fd)
{
char *s;
long length;
Dir *d;
d = dirfstat(fd);
if(d == nil)
return nil;
length = d->length;
free(d);
s = binalloc(&parsebin, length + 1, 0);
if(s == nil || readn(fd, s, length) != length)
return nil;
s[length] = 0;
return s;
}
/*
* create the imap tmp file.
* it just happens that we don't need multiple temporary files.
*/
int
imaptmp(void)
{
char buf[ERRMAX], name[Pathlen];
int tries, fd;
snprint(name, sizeof name, "/mail/box/%s/mbox.tmp.imp", username);
for(tries = 0; tries < Locksecs*2; tries++){
fd = create(name, ORDWR|ORCLOSE|OCEXEC, DMEXCL|0600);
if(fd >= 0)
return fd;
errstr(buf, sizeof buf);
if(cistrstr(buf, "locked") == nil)
break;
sleep(500);
}
return -1;
}
/*
* open a file which might be locked.
* if it is, spin until available
*/
static char *etab[] = {
"not found",
"does not exist",
"file locked", // hjfs
"file is locked",
"exclusive lock",
"already exists",
};
static int
bad(int idx)
{
char buf[ERRMAX];
int i;
rerrstr(buf, sizeof buf);
for(i = idx; i < nelem(etab); i++)
if(strstr(buf, etab[i]))
return 0;
return 1;
}
int
openlocked(char *dir, char *file, int mode)
{
int i, fd;
for(i = 0; i < 30; i++){
if((fd = cdopen(dir, file, mode)) >= 0 || bad(0))
return fd;
if((fd = cdcreate(dir, file, mode|OEXCL, DMEXCL|0600)) >= 0 || bad(2))
return fd;
sleep(1000);
}
werrstr("lock timeout");
return -1;
}
int
fqid(int fd, Qid *qid)
{
Dir *d;
d = dirfstat(fd);
if(d == nil)
return -1;
*qid = d->qid;
free(d);
return 0;
}
uint
mapint(Namedint *map, char *name)
{
int i;
for(i = 0; map[i].name != nil; i++)
if(cistrcmp(map[i].name, name) == 0)
break;
return map[i].v;
}
char*
estrdup(char *s)
{
char *t;
t = emalloc(strlen(s) + 1);
strcpy(t, s);
return t;
}
void*
emalloc(ulong n)
{
void *p;
p = malloc(n);
if(p == nil)
bye("server out of memory");
setmalloctag(p, getcallerpc(&n));
return p;
}
void*
ezmalloc(ulong n)
{
void *p;
p = malloc(n);
if(p == nil)
bye("server out of memory");
setmalloctag(p, getcallerpc(&n));
memset(p, 0, n);
return p;
}
void*
erealloc(void *p, ulong n)
{
p = realloc(p, n);
if(p == nil)
bye("server out of memory");
setrealloctag(p, getcallerpc(&p));
return p;
}
void
setname(char *fmt, ...)
{
char buf[128], *p;
int fd;
va_list arg;
snprint(buf, sizeof buf, "/proc/%d/args", getpid());
if((fd = open(buf, OWRITE)) < 0)
return;
va_start(arg, fmt);
p = vseprint(buf, buf + sizeof buf, fmt, arg);
va_end(arg);
write(fd, buf, p - buf);
close(fd);
}
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