src/pacman/log.c


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/*
 *  log.c
 * 
 *  Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
 * 
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 
 *  USA.
 */

#include "config.h"

#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <ctype.h>
#include <time.h>
#include <libintl.h>

#include <alpm.h>

/* pacman */
#include "log.h"
#include "conf.h"
#include "util.h"

#define LOG_STR_LEN 256

extern config_t *config;

static int neednl = 0; /* for cleaner message output */
static int needpad = 0; /* pad blanks to terminal width */

/* simple helper for needpad */
void set_output_padding(int on)
{
  needpad = on;
}

/* Callback to handle notifications from the library
 */
void cb_log(unsigned short level, char *msg)
{
  char str[LOG_STR_LEN] = "";

  if(!strlen(msg)) {
    return;
  }

  switch(level) {
    case PM_LOG_DEBUG:
      sprintf(str, _("debug"));
    break;
    case PM_LOG_ERROR:
      sprintf(str, _("error"));
    break;
    case PM_LOG_WARNING:
      sprintf(str, _("warning"));
    break;
    case PM_LOG_FUNCTION:
      /* TODO we should increase the indent level when this occurs so we can see
       * program flow easier.  It'll be fun
       */
      sprintf(str, _("function"));
    break;
    default:
      sprintf(str, "???");
    break;
  }

#ifdef PACMAN_DEBUG
  /* If debug is on, we'll timestamp the output */
  if(alpm_option_get_logmask() & PM_LOG_DEBUG) {
    time_t t;
    struct tm *tmp;
    char timestr[10] = {0};

    t = time(NULL);
    tmp = localtime(&t);
    strftime(timestr, 9, "%H:%M:%S", tmp);
    timestr[8] = '\0';

    MSG(NL, "[%s] %s: %s", timestr, str, msg);
  } else {
    MSG(NL, "%s: %s", str, msg);
  }
#else
  MSG(NL, "%s: %s", str, msg);
#endif
}

/* Wrapper to fprintf() that allows to choose if we want the output
 * to be appended on the current line, or written to a new one
 */
void pm_fprintf(FILE *file, unsigned short line, char *fmt, ...)
{
  va_list args;

  char str[LOG_STR_LEN];
  int len = 0;

  if(neednl == 1 && line == NL) {
    fprintf(file, "\n");
    neednl = 0;
  }

  if(!fmt) {
    return;
  }

  va_start(args, fmt);
  vsnprintf(str, LOG_STR_LEN, fmt, args);
  va_end(args);

  len = strlen(str);

  if(needpad == 1 && str[len-1] == '\n') {
    /* we want this removed so we can pad */
    str[len-1] = ' ';
    neednl = 1;
  }

  fprintf(file, str);

  if(needpad == 1) {
    unsigned int i, cols = getcols();
    for(i=len; i < cols; ++i) {
      fprintf(file, " ");
    }
    if(neednl == 1 && line == NL) {
      fprintf(file, "\n");
      neednl = 0;
    }
  }
  fflush(file);
  neednl = (str[strlen(str)-1] == '\n') ? 0 : 1;
}

/* Check verbosity option and, if set, print the
 * string to stdout
 */
void vprint(char *fmt, ...)
{
  va_list args;

  char str[LOG_STR_LEN];

  if(config->verbose > 0) {
    va_start(args, fmt);
    vsnprintf(str, LOG_STR_LEN, fmt, args);
    va_end(args);
    pm_fprintf(stdout, NL, str);
  }
}

/* presents a prompt and gets a Y/N answer
 */
int yesno(char *fmt, ...)
{
  char str[LOG_STR_LEN];
  char response[32];
  va_list args;

  if(config->noconfirm) {
    return(1);
  }

  va_start(args, fmt);
  vsnprintf(str, LOG_STR_LEN, fmt, args);
  va_end(args);

  /* Use stderr so questions are always displayed when redirecting output */
  pm_fprintf(stderr, NL, str); \

  if(fgets(response, 32, stdin)) {
    if(strlen(response) != 0) {
      strtrim(response);
    }

    /* User hits 'enter', forcing a newline here */
    neednl = 0;

    if(!strcasecmp(response, _("Y")) || !strcasecmp(response, _("YES")) || strlen(response) == 0) {
      return(1);
    }
  }
  return(0);
}

/* vim: set ts=2 sw=2 noet: */