linux 路径分割

(1) 获得当前工作目录的绝对路径

#include <stdio.h>
#include <direct.h>

int main()
{
	char *buffer;
	//也可以将buffer作为输出参数
	if((buffer = getcwd(NULL, 0)) == NULL)
	{
		perror("getcwd error");
	}
	else
	{
        printf("%s\n", buffer);
		free(buffer);
	}
}

(2)linux下，分解路径

Linux 下实现及测试代码如下：

#include <stdio.h>
#include <string.h>

#ifndef WIN32
void _splitpath(const char *path, char *drive, char *dir, char *fname, char *ext);

static void _split_whole_name(const char *whole_name, char *fname, char *ext);
#endif

/* main test */
int main(void)
{
  char *path = "/home/test/dir/f123.txt";
  // char *path = "/home/test/dir/123.txt";
  // char *path = "/home/test/dir/123";
  // char *path = "123";
  // char *path = "123.txt";

  char drive[128];
  char dir[128];
  char fname[128];
  char ext[128];

  _splitpath(path, drive, dir, fname, ext);
  printf("path  = %s\n", path);
  printf("dir   = %s\n", dir);
  printf("fname = %s\n", fname);
  printf("ext   = %s\n", ext);
  
  return 0;
}

#ifndef WIN32
void _splitpath(const char *path, char *drive, char *dir, char *fname, char *ext)
{
  char *p_whole_name;

  drive[0] = '\0';
  if (NULL == path)
  {
    dir[0] = '\0';
    fname[0] = '\0';
    ext[0] = '\0';
    return;
  }

  if ('/' == path[strlen(path)])
  {
    strcpy(dir, path);
    fname[0] = '\0';
    ext[0] = '\0';
    return;
  }

  p_whole_name = rindex(path, '/');
  if (NULL != p_whole_name)
  {
    p_whole_name++;
    _split_whole_name(p_whole_name, fname, ext);

    snprintf(dir, p_whole_name - path, "%s", path);
  }
  else
  {
    _split_whole_name(path, fname, ext);
    dir[0] = '\0';
  }
}

static void _split_whole_name(const char *whole_name, char *fname, char *ext)
{
  char *p_ext;

  p_ext = rindex(whole_name, '.');
  if (NULL != p_ext)
  {
    strcpy(ext, p_ext);
    snprintf(fname, p_ext - whole_name + 1, "%s", whole_name);
  }
  else
  {
    ext[0] = '\0';
    strcpy(fname, whole_name);
  }
}

#endif