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libisofs/libisofs/messages.c

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/*
* Copyright (c) 2007 Vreixo Formoso
*
* This file is part of the libisofs project; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation. See COPYING file for details.
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include "libisofs.h"
#include "messages.h"
#include "error.h"
int iso_message_id = LIBISO_MSGS_ORIGIN_IMAGE_BASE;
/**
* Threshold for aborting.
*/
int abort_threshold = LIBISO_MSGS_SEV_FAILURE;
#define MAX_MSG_LEN 4096
struct libiso_msgs *libiso_msgr = NULL;
int iso_init()
{
if (libiso_msgr == NULL) {
if (libiso_msgs_new(&libiso_msgr, 0) <= 0)
return ISO_FATAL_ERROR;
}
libiso_msgs_set_severities(libiso_msgr, LIBISO_MSGS_SEV_NEVER,
LIBISO_MSGS_SEV_FATAL, "libisofs: ", 0);
return 1;
}
void iso_finish()
{
libiso_msgs_destroy(&libiso_msgr, 0);
}
int iso_set_abort_severity(char *severity)
{
int ret, sevno;
ret = libiso_msgs__text_to_sev(severity, &sevno, 0);
if (ret <= 0)
return ISO_WRONG_ARG_VALUE;
if (sevno > LIBISO_MSGS_SEV_FAILURE || sevno < LIBISO_MSGS_SEV_NOTE)
return ISO_WRONG_ARG_VALUE;
ret = abort_threshold;
abort_threshold = sevno;
return ret;
}
void iso_msg_debug(int imgid, const char *fmt, ...)
{
char msg[MAX_MSG_LEN];
va_list ap;
va_start(ap, fmt);
vsnprintf(msg, MAX_MSG_LEN, fmt, ap);
va_end(ap);
libiso_msgs_submit(libiso_msgr, imgid, 0x00000002, LIBISO_MSGS_SEV_DEBUG,
LIBISO_MSGS_PRIO_ZERO, msg, 0, 0);
}
const char *iso_error_to_msg(int errcode)
{
switch(errcode) {
case ISO_CANCELED:
return "Operation canceled";
case ISO_FATAL_ERROR:
return "Unknown or unexpected fatal error";
case ISO_ERROR:
return "Unknown or unexpected error";
case ISO_ASSERT_FAILURE:
return "Internal programming error. Please report this bug";
case ISO_NULL_POINTER:
return "NULL pointer as value for an arg. that doesn't allow NULL";
case ISO_OUT_OF_MEM:
return "Memory allocation error";
case ISO_INTERRUPTED:
return "Interrupted by a signal";
case ISO_WRONG_ARG_VALUE:
return "Invalid parameter value";
case ISO_THREAD_ERROR:
return "Can't create a needed thread";
case ISO_WRITE_ERROR:
return "Write error";
case ISO_BUF_READ_ERROR:
return "Buffer read error";
case ISO_NODE_ALREADY_ADDED:
return "Trying to add to a dir a node already added to a dir";
case ISO_NODE_NAME_NOT_UNIQUE:
return "Node with same name already exists";
case ISO_NODE_NOT_ADDED_TO_DIR:
return "Trying to remove a node that was not added to dir";
case ISO_NODE_DOESNT_EXIST:
return "A requested node does not exists";
case ISO_IMAGE_ALREADY_BOOTABLE:
return "Try to set the boot image of an already bootable image";
case ISO_BOOT_IMAGE_NOT_VALID:
return "Trying to use an invalid file as boot image";
case ISO_FILE_ERROR:
return "Error on file operation";
case ISO_FILE_ALREADY_OPENNED:
return "Trying to open an already openned file";
case ISO_FILE_ACCESS_DENIED:
return "Access to file is not allowed";
case ISO_FILE_BAD_PATH:
return "Incorrect path to file";
case ISO_FILE_DOESNT_EXIST:
return "The file does not exists in the filesystem";
case ISO_FILE_NOT_OPENNED:
return "Trying to read or close a file not openned";
case ISO_FILE_IS_DIR:
return "Directory used where no dir is expected";
case ISO_FILE_READ_ERROR:
return "Read error";
case ISO_FILE_IS_NOT_DIR:
return "Not dir used where a dir is expected";
case ISO_FILE_IS_NOT_SYMLINK:
return "Not symlink used where a symlink is expected";
case ISO_FILE_SEEK_ERROR:
return "Can't seek to specified location";
case ISO_FILE_IGNORED:
return "File not supported in ECMA-119 tree and thus ignored";
case ISO_FILE_TOO_BIG:
return "A file is bigger than supported by used standard";
case ISO_FILE_CANT_WRITE:
return "File read error during image creations";
case ISO_FILENAME_WRONG_CHARSET:
return "Can't convert filename to requested charset";
case ISO_FILE_CANT_ADD:
return "File can't be added to the tree";
case ISO_FILE_IMGPATH_WRONG:
return "File path break specification constraints and will be ignored";
case ISO_CHARSET_CONV_ERROR:
return "Charset conversion error";
case ISO_MANGLE_TOO_MUCH_FILES:
return "Too much files to mangle, can't guarantee unique file names";
case ISO_WRONG_PVD:
return "Wrong or damaged Primary Volume Descriptor";
case ISO_WRONG_RR:
return "Wrong or damaged RR entry";
case ISO_UNSUPPORTED_RR:
return "Unsupported RR feature";
case ISO_WRONG_ECMA119:
return "Wrong or damaged ECMA-119";
case ISO_UNSUPPORTED_ECMA119:
return "Unsupported ECMA-119 feature";
case ISO_WRONG_EL_TORITO:
return "Wrong or damaged El-Torito catalog";
case ISO_UNSUPPORTED_EL_TORITO:
return "Unsupported El-Torito feature";
case ISO_ISOLINUX_CANT_PATCH:
return "Can't patch isolinux boot image";
case ISO_UNSUPPORTED_SUSP:
return "Unsupported SUSP feature";
case ISO_WRONG_RR_WARN:
return "Error on a RR entry that can be ignored";
case ISO_SUSP_UNHANDLED:
return "Error on a RR entry that can be ignored";
case ISO_SUSP_MULTIPLE_ER:
return "Multiple ER SUSP entries found";
case ISO_UNSUPPORTED_VD:
return "Unsupported volume descriptor found";
case ISO_EL_TORITO_WARN:
return "El-Torito related warning";
default:
return "Unknown error";
}
}
int iso_msg_submit(int imgid, int errcode, int causedby, const char *fmt, ...)
{
char msg[MAX_MSG_LEN];
va_list ap;
/* when called with ISO_CANCELED, we don't need to submit any message */
if (errcode == ISO_CANCELED && fmt == NULL) {
return ISO_CANCELED;
}
if (fmt) {
va_start(ap, fmt);
vsnprintf(msg, MAX_MSG_LEN, fmt, ap);
va_end(ap);
} else {
strncpy(msg, iso_error_to_msg(errcode), MAX_MSG_LEN);
}
libiso_msgs_submit(libiso_msgr, imgid, errcode, ISO_ERR_SEV(errcode),
ISO_ERR_PRIO(errcode), msg, 0, 0);
if (causedby != 0) {
iso_msg_debug(imgid, " > Caused by: %s", iso_error_to_msg(causedby));
if (ISO_ERR_SEV(causedby) == LIBISO_MSGS_SEV_FATAL) {
return ISO_CANCELED;
}
}
if (ISO_ERR_SEV(errcode) >= abort_threshold) {
return ISO_CANCELED;
} else {
return 0;
}
}
/**
* Control queueing and stderr printing of messages from libisofs.
* Severity may be one of "NEVER", "FATAL", "SORRY", "WARNING", "HINT",
* "NOTE", "UPDATE", "DEBUG", "ALL".
*
* @param queue_severity Gives the minimum limit for messages to be queued.
* Default: "NEVER". If you queue messages then you
* must consume them by iso_msgs_obtain().
* @param print_severity Does the same for messages to be printed directly
* to stderr.
* @param print_id A text prefix to be printed before the message.
* @return >0 for success, <=0 for error
*/
int iso_set_msgs_severities(char *queue_severity, char *print_severity,
char *print_id)
{
int ret, queue_sevno, print_sevno;
ret = libiso_msgs__text_to_sev(queue_severity, &queue_sevno, 0);
if (ret <= 0)
return 0;
ret = libiso_msgs__text_to_sev(print_severity, &print_sevno, 0);
if (ret <= 0)
return 0;
ret = libiso_msgs_set_severities(libiso_msgr, queue_sevno, print_sevno,
print_id, 0);
if (ret <= 0)
return 0;
return 1;
}
/**
* Obtain the oldest pending libisofs message from the queue which has at
* least the given minimum_severity. This message and any older message of
* lower severity will get discarded from the queue and is then lost forever.
*
* Severity may be one of "NEVER", "FATAL", "SORRY", "WARNING", "HINT",
* "NOTE", "UPDATE", "DEBUG", "ALL". To call with minimum_severity "NEVER"
* will discard the whole queue.
*
* @param error_code Will become a unique error code as listed in messages.h
* @param imgid Id of the image that was issued the message.
* @param msg_text Must provide at least ISO_MSGS_MESSAGE_LEN bytes.
* @param severity Will become the severity related to the message and
* should provide at least 80 bytes.
* @return 1 if a matching item was found, 0 if not, <0 for severe errors
*/
int iso_obtain_msgs(char *minimum_severity, int *error_code, int *imgid,
char msg_text[], char severity[])
{
int ret, minimum_sevno, sevno, priority, os_errno;
double timestamp;
pid_t pid;
char *textpt, *sev_name;
struct libiso_msgs_item *item= NULL;
ret = libiso_msgs__text_to_sev(minimum_severity, &minimum_sevno, 0);
if (ret <= 0)
return 0;
ret = libiso_msgs_obtain(libiso_msgr, &item, minimum_sevno,
LIBISO_MSGS_PRIO_ZERO, 0);
if (ret <= 0)
goto ex;
ret = libiso_msgs_item_get_msg(item, error_code, &textpt, &os_errno, 0);
if (ret <= 0)
goto ex;
strncpy(msg_text, textpt, ISO_MSGS_MESSAGE_LEN-1);
if (strlen(textpt) >= ISO_MSGS_MESSAGE_LEN)
msg_text[ISO_MSGS_MESSAGE_LEN-1] = 0;
ret = libiso_msgs_item_get_origin(item, &timestamp, &pid, imgid, 0);
if (ret <= 0)
goto ex;
severity[0]= 0;
ret = libiso_msgs_item_get_rank(item, &sevno, &priority, 0);
if (ret <= 0)
goto ex;
ret = libiso_msgs__sev_to_text(sevno, &sev_name, 0);
if (ret <= 0)
goto ex;
strcpy(severity, sev_name);
ret = 1;
ex: ;
libiso_msgs_destroy_item(libiso_msgr, &item, 0);
return ret;
}
/**
* Return the messenger object handle used by libisofs. This handle
* may be used by related libraries to their own compatible
* messenger objects and thus to direct their messages to the libisofs
* message queue. See also: libburn, API function burn_set_messenger().
*
* @return the handle. Do only use with compatible
*/
void *iso_get_messenger()
{
return libiso_msgr;
}
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