path: root/src/pacman/util.c

/*
 *  util.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"

#if defined(__APPLE__) || defined(__OpenBSD__)
#include <sys/syslimits.h>
#include <sys/stat.h>
#endif
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/time.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <ctype.h>
#include <dirent.h>
#include <unistd.h>
#include <libintl.h>
#ifdef CYGWIN
#include <limits.h> /* PATH_MAX */
#endif

#include <alpm.h>
#include <alpm_list.h>

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

extern config_t *config;

/* gets the current screen column width */
int getcols()
{
  if(!isatty(1)) {
    /* We will default to 80 columns if we're not a tty
     * this seems a fairly standard file width.
     */
    return 80;
  } else {
#ifdef TIOCGSIZE
    struct ttysize win;
    if(ioctl(1, TIOCGSIZE, &win) == 0) {
      return win.ts_cols;
    }
#elif defined(TIOCGWINSZ)
    struct winsize win;
    if(ioctl(1, TIOCGWINSZ, &win) == 0) {
      return win.ws_col;
    }
#endif
    /* If we can't figure anything out, we'll just assume 80 columns */
    /* TODO any problems caused by this assumption? */
    return 80;
  }
  /* Original envvar way - prone to display issues
  const char *cenv = getenv("COLUMNS");
  if(cenv != NULL) {
    return atoi(cenv);
  }
  return -1;
  */
}

/* does the same thing as 'mkdir -p' */
int makepath(char *path)
{
  char *orig, *str, *ptr;
  char full[PATH_MAX] = "";
  mode_t oldmask;

  oldmask = umask(0000);

  orig = strdup(path);
  str = orig;
  while((ptr = strsep(&str, "/"))) {
    if(strlen(ptr)) {
      struct stat buf;

      strcat(full, "/");
      strcat(full, ptr);
      if(stat(full, &buf)) {
        if(mkdir(full, 0755)) {
          free(orig);
          umask(oldmask);
          return(1);
        }
      }
    }
  }
  free(orig);
  umask(oldmask);
  return(0);
}

/* does the same thing as 'rm -rf' */
int rmrf(char *path)
{
  int errflag = 0;
  struct dirent *dp;
  DIR *dirp;

  if(!unlink(path)) {
    return(0);
  } else {
    if(errno == ENOENT) {
      return(0);
    } else if(errno == EPERM) {
      /* fallthrough */
    } else if(errno == EISDIR) {
      /* fallthrough */
    } else if(errno == ENOTDIR) {
      return(1);
    } else {
      /* not a directory */
      return(1);
    }

    if((dirp = opendir(path)) == (DIR *)-1) {
      return(1);
    }
    for(dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
      if(dp->d_ino) {
        char name[PATH_MAX];
        sprintf(name, "%s/%s", path, dp->d_name);
        if(strcmp(dp->d_name, "..") && strcmp(dp->d_name, ".")) {
          errflag += rmrf(name);
        }
      }
    }
    closedir(dirp);
    if(rmdir(path)) {
      errflag++;
    }
    return(errflag);
  }
}

/* output a string, but wrap words properly with a specified indentation
 */
void indentprint(const char *str, int indent)
{
  const char *p = str;
  int cidx = indent;

  while(*p) {
    if(*p == ' ') {
      const char *next = NULL;
      unsigned int len;
      p++;
      if(p == NULL || *p == ' ') continue;
      next = strchr(p, ' ');
      if(next == NULL) {
        next = p + strlen(p);
      }
      len = next - p;
      if(len > (getcols() - cidx - 1)) {
        /* newline */
        int i;
        fprintf(stdout, "\n");
        for(i = 0; i < indent; i++) {
          fprintf(stdout, " ");
        }
        cidx = indent;
      } else {
        printf(" ");
        cidx++;
      }
    }
    fprintf(stdout, "%c", *p);
    p++;
    cidx++;
  }
}

/* Convert a string to uppercase
 */
char *strtoupper(char *str)
{
  char *ptr = str;

  while(*ptr) {
    (*ptr) = toupper(*ptr);
    ptr++;
  }
  return str;
}

/* Trim whitespace and newlines from a string
 */
char *strtrim(char *str)
{
  char *pch = str;
  while(isspace(*pch)) {
    pch++;
  }
  if(pch != str) {
    memmove(str, pch, (strlen(pch) + 1));
  }
  
  pch = (char *)(str + (strlen(str) - 1));
  while(isspace(*pch)) {
    pch--;
  }
  *++pch = '\0';

  return str;
}

void list_display(const char *title, alpm_list_t *list)
{
  alpm_list_t *i;
  int cols, len;

  len = strlen(title);
  printf("%s ", title);

  if(list) {
    for(i = list, cols = len; i; i = alpm_list_next(i)) {
      char *str = alpm_list_getdata(i);
      int s = strlen(str) + 2;
      int maxcols = getcols();
      if(s + cols >= maxcols) {
        int i;
        cols = len;
        printf("\n");
        for (i = 0; i <= len; ++i) {
          printf(" ");
        }
      }
      printf("%s  ", str);
      cols += s;
    }
    printf("\n");
  } else {
    printf(_("None\n"));
  }
}

/* Display a list of transaction targets.
 * `pkgs` should be a list of pmsyncpkg_t's,
 * retrieved from a transaction object
 */
void display_targets(alpm_list_t *syncpkgs)
{
  char *str;
  alpm_list_t *i, *j;
  alpm_list_t *targets = NULL, *to_remove = NULL;
  /* TODO these are some messy variable names */
  unsigned long size = 0, isize = 0, rsize = 0;
  double mbsize = 0.0, mbisize = 0.0, mbrsize = 0.0;

  for(i = syncpkgs; i; i = alpm_list_next(i)) {
    pmsyncpkg_t *sync = alpm_list_getdata(i);
    pmpkg_t *pkg = alpm_sync_get_pkg(sync);

    /* If this sync record is a replacement, the data member contains
     * a list of packages to be removed due to the package that is being
     * installed. */
    if(alpm_sync_get_type(sync) == PM_SYNC_TYPE_REPLACE) {
      alpm_list_t *to_replace = alpm_sync_get_data(sync);
      
      for(j = to_replace; j; j = alpm_list_next(j)) {
        pmpkg_t *rp = alpm_list_getdata(j);
        const char *name = alpm_pkg_get_name(rp);

        if(!alpm_list_find_str(to_remove, name)) {
          rsize += alpm_pkg_get_isize(rp);
          to_remove = alpm_list_add(to_remove, strdup(name));
        }
      }
    }

    size += alpm_pkg_get_size(pkg);
    isize += alpm_pkg_get_isize(pkg);

    asprintf(&str, "%s-%s", alpm_pkg_get_name(pkg), alpm_pkg_get_version(pkg));
    targets = alpm_list_add(targets, str);
  }

  /* Convert byte sizes to MB */
  mbsize = (double)(size) / (1024.0 * 1024.0);
  mbisize = (double)(isize) / (1024.0 * 1024.0);
  mbrsize = (double)(rsize) / (1024.0 * 1024.0);

  if(to_remove) {
    MSG(NL, "\n"); /* TODO ugly hack. printing a single NL should be easy */
    list_display(_("Remove:"), to_remove);
    FREELIST(to_remove);
  
    if(mbrsize > 0) {
      /* round up if size is really small */
      if(mbrsize < 0.1) {
        mbrsize = 0.1;
      }
      MSG(NL, _("\nTotal Removed Size:   %.2f MB\n"), mbrsize);
    }
  }

  MSG(NL, "\n"); /* TODO ugly hack. printing a single NL should be easy */ 
  list_display(_("Targets:"), targets);

  /* round up if size is really small */
  if(mbsize < 0.1) {
    mbsize = 0.1;
  }
  MSG(NL, _("\nTotal Package Size:   %.2f MB\n"), mbsize);
  
  if(mbisize > mbsize) {
    /*round up if size is really small */
    if(mbisize < 0.1) {
      mbisize = 0.1;
    }
    MSG(NL, _("Total Installed Size:   %.2f MB\n"), mbisize);
  }

  FREELIST(targets);
}

/* Silly little helper function, determines if the caller needs a visual update
 * since the last time this function was called.
 * This is made for the two progress bar functions, to prevent flicker
 *
 * first_call indicates if this is the first time it is called, for
 * initialization purposes */
float get_update_timediff(int first_call)
{
  float retval = 0.0;
  static struct timeval last_time = {0};

  /* on first call, simply set the last time and return */
  if(first_call) {
    gettimeofday(&last_time, NULL);
  } else {
    struct timeval this_time;
    float diff_sec, diff_usec;

    gettimeofday(&this_time, NULL);
    diff_sec = this_time.tv_sec - last_time.tv_sec;
    diff_usec = this_time.tv_usec - last_time.tv_usec;

    retval = diff_sec + (diff_usec / 1000000.0);

    /* return 0 and do not update last_time if interval was too short */
    if(retval < UPDATE_SPEED_SEC) {
      retval = 0.0;
    } else {
      last_time = this_time;
      /* printf("\nupdate retval: %f\n", retval); DEBUG*/
    }
  }
  
  return(retval);
}

/* refactored from cb_trans_progress */
void fill_progress(const int percent, const int proglen)
{
  const unsigned short chomp = alpm_option_get_chomp();
  const unsigned int hashlen = proglen - 8;
  const unsigned int hash = percent * hashlen / 100;
  static unsigned int lasthash = 0, mouth = 0;
  unsigned int i;

  /* printf("\ndebug: proglen: %i\n", proglen); DEBUG*/

  if(percent == 0) {
    lasthash = 0;
    mouth = 0;
  }

  /* magic numbers, how I loathe thee */
  if(proglen > 8) {
    printf(" [");
    for(i = hashlen; i > 1; --i) {
      /* if special progress bar enabled */
      if(chomp) {
        if(i > hashlen - hash) {
          printf("-");
        } else if(i == hashlen - hash) {
          if(lasthash == hash) {
            if(mouth) {
              printf("\033[1;33mC\033[m");
            } else {
              printf("\033[1;33mc\033[m");
            }
          } else {
            lasthash = hash;
            mouth = mouth == 1 ? 0 : 1;
            if(mouth) {
              printf("\033[1;33mC\033[m");
            } else {
              printf("\033[1;33mc\033[m");
            }
          }
        } else if(i%3 == 0) {
          printf("\033[0;37mo\033[m");
        } else {
          printf("\033[0;37m \033[m");
        }
      } /* else regular progress bar */
      else if(i > hashlen - hash) {
        printf("#");
      } else {
        printf("-");
      }
    }
    printf("]");
  }
  /* print percent after progress bar */
  if(proglen > 5) {
    printf(" %3d%%", percent);
  }

  if(percent == 100) {
    printf("\n");
  } else {
    printf("\r");
  }
  fflush(stdout);
}

/* vim: set ts=2 sw=2 noet: */