#include "vserver.h"
#include "pathconfig.h"
#include "compat-c99.h"
+#include "lib_internal/util.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <unistd.h>
-static ctx_t
+#ifdef VC_ENABLE_API_COMPAT
+#include <fcntl.h>
+
+static xid_t
+extractLegacyXID(char const *dir, char const *basename)
+{
+ size_t l1 = strlen(dir);
+ size_t l2 = strlen(basename);
+ char path[l1 + l2 + sizeof("/.ctx")];
+ char * ptr = path;
+ int fd;
+ ssize_t len;
+ xid_t result = VC_NOXID;
+
+ ptr = Xmemcpy(ptr, dir, l1);
+ *ptr++ = '/';
+ ptr = Xmemcpy(ptr, basename, l2);
+ ptr = Xmemcpy(ptr, ".ctx", 5);
+
+ fd = open(path, O_RDONLY);
+ if (fd==-1) return VC_NOXID;
+
+ len = lseek(fd, 0, SEEK_END);
+
+ if (len!=-1 && lseek(fd, 0, SEEK_SET)!=-1) {
+ char buf[len+2];
+ char const *pos = 0;
+
+ buf[0] = '\n';
+
+ if (read(fd, buf+1, len+1)==len) {
+ buf[len+1] = '\0';
+ pos = strstr(buf, "\nS_CONTEXT=");
+ }
+
+ if (pos) pos += 11;
+ if (*pos>='1' && *pos<='9')
+ result = atoi(pos);
+ }
+
+ close(fd);
+ return result;
+}
+#else
+static xid_t
+extractLegacyXID(char const UNUSED *dir, char const UNUSED *basename)
+{
+ return VC_NOXID;
+}
+#endif
+
+
+static xid_t
getCtxFromFile(char const *pathname)
{
int fd;
fd = open(pathname, O_RDONLY);
- if (fd==-1 ||
- (len=lseek(fd, 0, SEEK_END))==-1 ||
+ if (fd==-1) return VC_NOCTX;
+ if ((len=lseek(fd, 0, SEEK_END))==-1 ||
(len>50) ||
- (lseek(fd, 0, SEEK_SET)==-1))
+ (lseek(fd, 0, SEEK_SET)==-1)) {
+ close(fd);
return VC_NOCTX;
+ }
- BS;
+ {
char buf[len+1];
char *errptr;
- ctx_t res;
+ xid_t res;
- if (TEMP_FAILURE_RETRY(read(fd, buf, len+1))!=len)
- return VC_NOCTX;
+ if (TEMP_FAILURE_RETRY(read(fd, buf, len+1))!=len) res = VC_NOCTX;
+ else {
+ buf[len] = '\0';
- res = strtol(buf, &errptr, 10);
- if (*errptr!='\0' && *errptr!='\n') return VC_NOCTX;
+ res = strtol(buf, &errptr, 10);
+ if (*errptr!='\0' && *errptr!='\n') res = VC_NOCTX;
+ }
+ close(fd);
return res;
- BE;
+ }
}
-ctx_t
-vc_getVserverCtx(char const *id, vcCfgStyle style)
+xid_t
+vc_getVserverCtx(char const *id, vcCfgStyle style, bool honor_static, bool *is_running)
{
size_t l1 = strlen(id);
- char buf[sizeof(CONFDIR "//") + l1 + sizeof("/run")];
+ char buf[sizeof(CONFDIR "//") + l1 + sizeof("/context")];
if (style==vcCFG_NONE || style==vcCFG_AUTO)
style = vc_getVserverCfgStyle(id);
-
+
+ if (is_running) *is_running = false;
+
switch (style) {
case vcCFG_NONE : return VC_NOCTX;
- case vcCFG_LEGACY : return VC_NOCTX; // todo
+ case vcCFG_LEGACY :
+ return extractLegacyXID(DEFAULT_PKGSTATEDIR, id);
case vcCFG_RECENT_SHORT :
case vcCFG_RECENT_FULL : {
size_t idx = 0;
+ xid_t res = 0;
+
if (style==vcCFG_RECENT_SHORT) {
memcpy(buf, CONFDIR "/", sizeof(CONFDIR "/")-1);
idx = sizeof(CONFDIR "/") - 1;
}
memcpy(buf+idx, id, l1); idx += l1;
- memcpy(buf+idx, "/run", 4); idx += 4;
- buf[idx] = '\0';
+ memcpy(buf+idx, "/run", 5); // appends '\0' too
+ res = getCtxFromFile(buf);
- return getCtxFromFile(buf);
+ // when context information could be read, we have to verify that
+ // it belongs to a running vserver and the both vservers are
+ // identically
+ if (res!=VC_NOCTX) {
+ char *cur_name;
+ struct vc_vx_info info;
+
+ // determine the vserver which is associated with the xid
+ // resp. skip this step when the context does not exist
+ cur_name = (vc_get_vx_info(res, &info)!=-1 ?
+ vc_getVserverByCtx_Internal(res, &style, 0, false) : 0);
+
+ buf[idx] = '\0'; // cut off the '/run' from the vserver name
+ res = ((cur_name!=0 &&
+ vc_compareVserverById(buf, vcCFG_RECENT_FULL,
+ cur_name, vcCFG_RECENT_FULL)==0)
+ ? res
+ : VC_NOCTX); // correct the value of 'res'
+
+ free(cur_name);
+ }
+
+ if (is_running) // fill 'is_running' information...
+ *is_running = res!=VC_NOCTX;
+
+ if (res==VC_NOCTX && honor_static) {
+ memcpy(buf+idx, "/context", 9); // appends '\0' too
+
+ res = getCtxFromFile(buf);
+ }
+
+ return res;
}
default : return VC_NOCTX;
}