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shoudl in theory handle locks better.... 

SVN revision: 2754
This commit is contained in:
Carsten Haitzler 2000-06-05 18:19:37 +00:00
parent 102fa5c645
commit 03443b4e9e
1 changed files with 72 additions and 2 deletions
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74
loaders/loader_db.c
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@ -25,7 +25,44 @@ void formats (ImlibLoader *l);
#include <sys/stat.h>
#include <fcntl.h>
#include <db.h>
#include <unistd.h>
#include <sys/stat.h>
static int
permissions(char *file)
{
struct stat st;
if (!stat(file, &st) < 0)
return 0;
return st.st_mode;
}
static int
exists(char *file)
{
struct stat st;
if (!stat(file, &st) < 0)
return 0;
return 1;
}
static int
can_read(char *file)
{
if (!(permissions(file) & (S_IRUSR | S_IRGRP | S_IROTH)))
return 0;
return (1 + access(file, R_OK));
}
static int
can_write(char *file)
{
if (!(permissions(file) & (S_IWUSR | S_IWGRP | S_IWOTH)))
return 0;
return (1 + access(file, W_OK));
}
char
load (ImlibImage *im, ImlibProgressFunction progress,
@ -48,6 +85,8 @@ load (ImlibImage *im, ImlibProgressFunction progress,
int flen;
*ptr = 0;
if (!can_read(file))
return 0;
flen = strlen(file);
strcpy(key, &(ptr[1]));
if ((flen > 3) &&
@ -60,7 +99,19 @@ load (ImlibImage *im, ImlibProgressFunction progress,
return 0;
db = dbm_open(file, O_RDONLY, 0664);
if (!db)
return 0;
{
int i;
for (i = 0; i < 32; i++)
{
usleep((rand() % 0xff) * 1000);
db = dbm_open(file, O_RDONLY, 0664);
if (db)
break;
}
if (!db)
return 0;
}
dkey.dptr = key;
dkey.dsize = strlen(key);
@ -195,6 +246,13 @@ save (ImlibImage *im, ImlibProgressFunction progress,
int flen;
*cp = 0;
if (exists(file))
{
if (!can_write(file))
return 0;
if (!can_read(file))
return 0;
}
flen = strlen(file);
strcpy(key, &(cp[1]));
if ((flen > 3) &&
@ -207,7 +265,19 @@ save (ImlibImage *im, ImlibProgressFunction progress,
return 0;
db = dbm_open(file, O_RDWR | O_CREAT, 0664);
if (!db)
return 0;
{
int i;
for (i = 0; i < 32; i++)
{
usleep((rand() % 0xff) * 1000);
db = dbm_open(file, O_RDWR | O_CREAT, 0664);
if (db)
break;
}
if (!db)
return 0;
}
dkey.dptr = key;
dkey.dsize = strlen(key);