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#include "utils.h"
#include "string.h"
#include <dlfcn.h>
#include <sys/stat.h>
#include <errno.h>
extern int errno;
static int GetPair(char *buf, int buf_len, char *key, char *value, char **tail)
{
int i=0, j;
key[0] = 0;
value[0] = 0;
if (buf[i] == '#')
{
for (; buf[i] != '\n' && i < buf_len; i++); /* eat comment line */
if (buf[i] == '\n')
i++; /* bump past '\n' */
}
j = 0;
while ((buf[i] != '=') && (i < buf_len) && (j < UTILS_LINE_SIZE))
key[j++] = buf[i++];
for (j--; key[j] == ' ' && j > 0; j--); /* eat white space before = */
key[++j] = 0;
if (buf[i] == '=')
for (i++; buf[i] == ' ' && i < buf_len; i++); /* eat white space after = */
j = 0;
while ((buf[i] != '\n') && (i < buf_len) && (j < UTILS_LINE_SIZE))
value[j++] = buf[i++];
for (j--; value[j] == ' ' && j > 0; j--); /* eat white space before \n */
value[++j] = 0;
if (buf[i] == '\n')
i++; /* bump past '\n' */
if (tail != NULL)
*tail = buf + i; /* tail points to next line */
return i;
}
/* Get value for specified section and key from hplip.conf. */
enum UTILS_CONF_RESULT get_conf(const char *section, const char *key, char *value, int value_size)
{
return get_key_value(CONFDIR "/hplip.conf", section, key, value, value_size);
}
/* Get value for specified section and key from specified file. */
enum UTILS_CONF_RESULT get_key_value(const char *file, const char *section, const char *key, char *value, int value_size)
{
char new_key[UTILS_LINE_SIZE];
char new_value[UTILS_LINE_SIZE];
char rcbuf[255];
char new_section[32];
char *tail;
FILE *inFile;
enum UTILS_CONF_RESULT stat = UTILS_CONF_DATFILE_ERROR;
int i,j;
if((inFile = fopen(file, "r")) == NULL)
{
BUG("unable to open %s: %m\n", file);
goto bugout;
}
new_section[0] = 0;
/* Read the config file */
while ((fgets(rcbuf, sizeof(rcbuf), inFile) != NULL))
{
if (rcbuf[0] == '[')
{
i = j = 0;
while ((rcbuf[i] != ']') && (j < (sizeof(new_section)-2)))
new_section[j++] = rcbuf[i++];
new_section[j++] = rcbuf[i++]; /* ']' */
new_section[j] = 0; /* zero terminate */
continue;
}
GetPair(rcbuf, strlen(rcbuf), new_key, new_value, &tail);
if ((strcasecmp(new_section, section) == 0) && (strcasecmp(new_key, key) == 0))
{
strncpy(value, new_value, value_size);
stat = UTILS_CONF_OK;
break; /* done */
}
}
if (stat != UTILS_CONF_OK)
BUG("unable to find %s %s in %s\n", section, key, file);
bugout:
if (inFile != NULL)
fclose(inFile);
return stat;
}
enum UTILS_PLUGIN_STATUS validate_plugin_version()
{
char hplip_version[128];
char plugin_version[128];
if (get_conf("[hplip]", "version", hplip_version, sizeof(hplip_version)) != UTILS_CONF_OK)
return UTILS_PLUGIN_STATUS_NOT_INSTALLED;
if (get_key_value(HPLIP_PLUGIN_STATE,"[plugin]" , "version", plugin_version, sizeof(plugin_version)) != UTILS_CONF_OK )
{
BUG("validate_plugin_version() Failed to get Plugin version from [%s]\n", "/var/lib/hp/hplip.state");
return UTILS_PLUGIN_STATUS_NOT_INSTALLED;
}
if (strcmp(hplip_version, plugin_version) == 0)
{
return UTILS_PLUGIN_STATUS_OK;
}
else
{
BUG("validate_plugin_version() Plugin version[%s] mismatch with HPLIP version[%s]\n",plugin_version, hplip_version);
return UTILS_PLUGIN_STATUS_MISMATCH;
}
return UTILS_PLUGIN_STATUS_NOT_INSTALLED;
}
void *load_plugin_library (enum UTILS_PLUGIN_LIBRARY_TYPE eLibraryType, const char *szPluginName)
{
void *pHandler = NULL;
char szHome[256];
char szLibraryFile[256];
if (szPluginName == NULL || szPluginName[0] == '\0')
{
BUG("Invalid Library name\n");
return pHandler;
}
if (get_conf("[dirs]", "home", szHome, sizeof(szHome)) != UTILS_CONF_OK)
{
BUG("Failed to find the home directory from hplip.conf file\n");
return pHandler;
}
if (validate_plugin_version() != UTILS_PLUGIN_STATUS_OK )
{
BUG("Plugin version is not matching \n");
return pHandler;
}
if (eLibraryType == UTILS_PRINT_PLUGIN_LIBRARY)
snprintf(szLibraryFile, sizeof(szLibraryFile), "%s/prnt/plugins/%s", szHome, szPluginName);
else if (eLibraryType == UTILS_SCAN_PLUGIN_LIBRARY)
snprintf(szLibraryFile, sizeof(szLibraryFile), "%s/scan/plugins/%s", szHome, szPluginName);
else if (eLibraryType == UTILS_FAX_PLUGIN_LIBRARY)
snprintf(szLibraryFile, sizeof(szLibraryFile), "%s/fax/plugins/%s", szHome, szPluginName);
else
{
BUG("Invalid Library Type =%d \n",eLibraryType);
return pHandler;
}
return load_library (szLibraryFile);
}
void *load_library (const char *szLibraryFile)
{
void *pHandler = NULL;
if (szLibraryFile == NULL || szLibraryFile[0] == '\0')
{
BUG("Invalid Library name\n");
return pHandler;
}
if ((pHandler = dlopen(szLibraryFile, RTLD_NOW|RTLD_GLOBAL)) == NULL)
BUG("unable to load library %s: %s\n", szLibraryFile, dlerror());
return pHandler;
}
void *get_library_symbol(void *pLibHandler, const char *szSymbol)
{
void *pSymHandler = NULL;
if (pLibHandler == NULL)
{
BUG("Invalid Library hanlder\n");
return NULL;
}
if (szSymbol == NULL || szSymbol[0] == '\0')
{
BUG("Invalid Library symbol\n");
return NULL;
}
pSymHandler = dlsym(pLibHandler, szSymbol);
if (pSymHandler == NULL)
BUG("Can't find %s symbol in Library:%s\n",szSymbol,dlerror());
return pSymHandler;
}
void unload_library(void *pLibHandler)
{
if (pLibHandler)
dlclose(pLibHandler);
else
BUG("Invalid Library hanlder pLibHandler = NULL.\n");
}
int createTempFile(char* szFileName, FILE** pFilePtr)
{
char* pFilePos = NULL;
char szFolderName[64]={0,};
struct stat st;
int iFD;
if (szFileName == NULL || szFileName[0] == '\0' || pFilePtr == NULL)
{
BUG("Invalid Filename/ pointer\n");
return 0;
}
if (strstr(szFileName,"XXXXXX") == NULL)
strcat(szFileName,"_XXXXXX");
pFilePos = strrchr(szFileName, '/');
if (pFilePos)
{
strncpy(szFolderName, szFileName, (pFilePos - szFileName));
if(stat(szFolderName,&st) == 0)
{
if(st.st_mode & S_IFDIR != 0)
{
iFD = mkstemp(szFileName);
*pFilePtr = fdopen(iFD,"w+");
}
else
BUG("Insufficient directory [%s] permissions\n",szFolderName);
}
else
BUG("Failed to check directory [%s] errno[%d]\n",szFolderName, errno);
}
else
{
iFD = mkstemp(szFileName);
*pFilePtr = fdopen(iFD,"w+");
}
return iFD;
}
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