/**
* uid_map_from_file: called from oh_uid_initialize() during intializaion
* this function if a uid map file exists reads the current value for
* uid, and intializes the memory resident uid map file from file.
*
*
*
* Return value: success 0, error -1.
**/
static int uid_map_from_file(void)
{
char *uid_map_file;
int file;
int rval;
/* initialize uid map file */
uid_map_file = (char *)getenv("UID_MAP");
if (uid_map_file == NULL) {
uid_map_file = OH_DEFAULT_UID_MAP;
}
file = open(uid_map_file, O_RDONLY);
if(file < 0) {
/* create map file with resource id initial value */
dbg("Configuration file '%s' does not exist, initializing", uid_map_file);
file = open(uid_map_file,
O_RDWR | O_CREAT | O_TRUNC,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH );
if(file < 0) {
dbg("Could not initialize uid map file, %s", uid_map_file );
return(-1);
}
/* write initial uid value */
if( write(file,(void *)&resource_id, sizeof(resource_id)) < 0 ) {
dbg("failed to write uid, on uid map file initialization");
close(file);
return(-1);
}
if(close(file) != 0) {
dbg("Couldn't close file '%s'.during uid map file initialization", uid_map_file);
return(-1);
}
/* return from successful initialization, from newly created uid map file */
return(0);
}
/* read uid/resouce_id highest count from uid map file */
if (read(file,&resource_id, sizeof(resource_id)) != sizeof(resource_id)) {
dbg("error setting uid from existing uid map file");
return(-1);
}
rval = build_uid_map_data(file);
close(file);
if (rval < 0)
return(-1);
/* return from successful initialization from existing uid map file */
return(0);
}
/*
* uid_map_from_file: called from oh_uid_initialize() during intialization
* This function, if a uid map file exists, reads the current value for
* uid and intializes the memory resident uid map file from file.
*
* Return value: success 0, error -1.
*/
static gint uid_map_from_file()
{
FILE *fp;
int rval;
#ifndef _WIN32
mode_t prev_umask;
#endif
if (!oh_uid_map_file) {
return 0;
}
fp = fopen(oh_uid_map_file, "rb");
if(!fp) {
/* create map file with resource id initial value */
WARN("uid_map file '%s' could not be opened, initializing", oh_uid_map_file);
#ifndef _WIN32
prev_umask = umask(022);
#endif
fp = fopen(oh_uid_map_file, "wb");
if(!fp) {
CRIT("Could not initialize uid map file, %s", oh_uid_map_file );
#ifndef _WIN32
if (geteuid() != 0)
INFO("Use OPENHPI_UID_MAP env var to set uid_map file path");
umask (prev_umask);
#endif
return -1;
}
#ifndef _WIN32
umask (prev_umask);
#endif
/* write initial uid value */
if(fwrite(&resource_id, sizeof(resource_id), 1, fp) != 1 ) {
CRIT("failed to write uid, on uid map file initialization");
fclose(fp);
return -1;
}
if(fclose(fp) != 0) {
CRIT("Couldn't close file '%s'.during uid map file initialization", oh_uid_map_file);
return -1;
}
/* return from successful initialization, from newly created uid map file */
return 0;
}
/* read uid/resouce_id highest count from uid map file */
if (fread(&resource_id, sizeof(resource_id), 1, fp) != 1) {
CRIT("error setting uid from existing uid map file");
fclose(fp);
return -1;
}
rval = build_uid_map_data(fp);
fclose(fp);
if (rval < 0)
return -1;
/* return from successful initialization from existing uid map file */
return 0;
}
