src/pacman/util.c


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

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

extern int maxcols;
extern config_t *config;

/* 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);
  }
  return(0);
}

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

  while(*p) {
    if(*p == ' ') {
      char *next = NULL;
      int len;
      p++;
      if(p == NULL || *p == ' ') continue;
      next = strchr(p, ' ');
      if(next == NULL) {
        next = p + strlen(p);
      }
      len = next - p;
      if(len > (maxcols-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;
}

/* match a string against a regular expression */
int reg_match(char *string, char *pattern)
{
  int result;
  regex_t reg;

  if(regcomp(&reg, pattern, REG_EXTENDED | REG_NOSUB | REG_ICASE) != 0) {
    fprintf(stderr, "error: %s is not a valid regular expression.\n", pattern);
    return(-1);
  }
  result = regexec(&reg, string, 0, 0, 0);
  regfree(&reg);
  return(!(result));
}

/* vim: set ts=2 sw=2 noet: */