thodg/got/lib/path.c

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• Show log

  Commit

• Author : Stefan Sperling
  Date : 2018-04-24 11:47:09
  Hash : 80f4afe8
  Message : introduce got_opentempfd()

• lib/path.c

• /*
   * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  
  #include <limits.h>
  #include <stdlib.h>
  #include <unistd.h>
  #include <stdio.h>
  #include <string.h>
  
  #include "got_error.h"
  
  #include "got_lib_path.h"
  
  int
  got_path_is_absolute(const char *path)
  {
  	return path[0] == '/';
  }
  
  char *
  got_path_get_absolute(const char *relpath) 
  {
  	char cwd[PATH_MAX];
  	char *abspath;
  
  	if (getcwd(cwd, sizeof(cwd)) == NULL)
  		return NULL;
  
  	if (asprintf(&abspath, "%s/%s/", cwd, relpath) == -1)
  		return NULL;
  
  	return abspath;
  }
  
  char *
  got_path_normalize(const char *path)
  {
  	char *resolved;
  
  	resolved = realpath(path, NULL);
  	if (resolved == NULL)
  		return NULL;
  	
  	if (!got_path_is_absolute(resolved)) {
  		char *abspath = got_path_get_absolute(resolved);
  		free(resolved);
  		resolved = abspath;
  	}
  
  	return resolved;
  }
  
  const struct got_error *
  got_path_segment_count(int *count, const char *path)
  {
  	char *s = strdup(path), *p;
  
  	*count = 0;
  
  	if (s == NULL)
  		return got_error_from_errno();
  
  	do {
  		p = strsep(&s, "/");
  		if (s && *s != '/')
  			(*count)++;
  	} while (p);
  
  	return NULL;
  }
  
  int
  got_opentempfd(void)
  {
  	char name[PATH_MAX];
  	int fd;
  
  	if (strlcpy(name, "/tmp/got.XXXXXXXX", sizeof(name)) >= sizeof(name))
  		return -1;
  
  	fd = mkstemp(name);
  	unlink(name);
  	return fd;
  }
  
  FILE *
  got_opentemp(void)
  {
  	int fd;
  	FILE *f;
  
  	fd = got_opentempfd();
  	if (fd < 0)
  		return NULL;
  
  	f = fdopen(fd, "w+");
  	if (f == NULL) {
  		close(fd);
  		return NULL;
  	}
  
  	return f;
  }
  
  const struct got_error *
  got_opentemp_named(char **path, FILE **outfile, const char *basepath)
  {
  	const struct got_error *err = NULL;
  	int fd;
  
  	if (asprintf(path, "%s-XXXXXX", basepath) == -1) {
  		*path = NULL;
  		return got_error_from_errno();
  	}
  
  	fd = mkstemp(*path);
  	if (fd == -1) {
  		err = got_error_from_errno();
  		free(*path);
  		*path = NULL;
  		return err;
  	}
  
  	*outfile = fdopen(fd, "w+");
  	if (*outfile == NULL) {
  		err = got_error_from_errno();
  		free(*path);
  		*path = NULL;
  	}
  
  	return err;
  }