Language Ccpp Cref Examples Stat.c

/ ************************************************************************
 *
 * Purpose: Program to demonstrate the 'stat' function.
 *          The program will show the modification and access times
 *	    plus the size of a file.
 *
 * Author:  M J Leslie
 *
 * Date:    01-Jun-95 MJL Minor bug fixed.
 *          13-Apr-95 MJL Inital Release
 *
 * Notes:   This function is only available to Unix systems. If you 
 *          are on a DOS machine, this will not compile.
 *
 * Compile: Change the #define (below) to a suitable file name on your 
 *          system. The file name is not passed on the command line 
 *	    as I did not want to complicate the example.
 *
 ************************************************************************/


#include <sys/stat.h>			/* declare the 'stat' structure	*/
#include <sys/types.h>			
#include <unistd.h>		
#include <stdio.h>			/* printf			*/
#include <time.h>

#define  FILENAME "martin"		/* PUT YOUR FILE NAME HERE	*/

/************************************************************************/

char * format_time(time_t cal_time);

void file_stat(char * filename);

/************************************************************************/

main()
{
  file_stat(FILENAME);
}

/************************************************************************/

void file_stat(char * filename)
{
  struct stat stat_p;		/* 'stat_p' is a pointer to a structure
				 * of type 'stat'.  			*/

				/* Get stats for file and place them in
				 * the structure.			*/
  if ( -1 ==  stat (filename, &stat_p))
  {
    printf(" Error occoured attempting to stat %s\n", filename);
    exit(0);
  }
				/* Print a few structure members.	*/
   
  printf("Stats for %s \n", filename);

  printf("Modify time is %s", format_time(stat_p.st_mtime));

				/* Access time does not get updated
				   if the filesystem is NFS mounted!	*/

  printf("Access time is %s", format_time(stat_p.st_atime));
   
  printf("File size is   %d bytes\n", stat_p.st_size);
}

/************************************************************************/

char * format_time(time_t cal_time)
{
  struct tm *time_struct;
  static char string[30];
				/* Put the calendar time into a structure
				 * if type 'tm'.			*/
  time_struct=localtime(&cal_time);

				/* Build a formatted date from the 
				 * structure.				*/
  strftime(string, sizeof string, "%h %e %H:%M\n", time_struct);

				/* Return the date/time			*/
  return(string);
}

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