directory as tree

anything2 · #1 (**permalink**) 02-28-2007

hi i have modified a program to display directory entries recursively in a tree like form
i need an output with the following guidelines:
the prog displays the contents of the directory
the directory contents are sorted before printing so that directories come before regular files
if an entry is a directory program executes recursively
executable files end with a *
directory ends with a /
links end with -> followed by the actual link
for each directory use two additional space char in addition to the current spacing

if an option -s is given,prog displays only dir str but not contents

eg of output
subj/
docu/
school.doc
RCS -> /mnt/anything2/folder1

the problem is it isnt complete and it isnt compl\iling
please help

my program:::

Code:

/* ls2.c
 *	purpose  list contents of directory or directories
 *	action   if no args, use .  else list files in args
 *	note     uses stat and pwd.h and grp.h 
 *	BUG: try ls2 /tmp  
 */
#include	<stdio.h>
#include	<sys/types.h>
#include	<dirent.h>
#include	<sys/stat.h>
#include	<time.h>
#include	<unistd.h>

void do_ls(char[], int);
void dostat(char *,char *,int);
void show_file_info( char *, struct stat *,char *,int);
void mode_to_letters( int , char [] );
char *uid_to_name( uid_t );
char *gid_to_name( gid_t );
//int flag
main(int ac, char *av[])
{	
	//char c;
	//int flag=0;
	int counter=0;
	//if(ch == 's'){flag =1;}
	if ( ac == 1 )
		do_ls( ".",counter );
	else
		while ( --ac ){
			++av;
			do_ls( *av,counter );
		}
}

void do_ls( char dirname[] ,int count)
/*
 *	list files in directory called dirname
 */
{
	DIR		*dir_ptr;		/* the directory */
	struct dirent	*direntp;		/* each entry	 */
	char *cwd;
	count++;

	if ( ( dir_ptr = opendir( dirname ) ) == NULL )
		fprintf(stderr,"ls1: cannot open %s\n", dirname);
	else
	{
		if(dirname=="."){
			if((cwd= getcwd(NULL,64))==NULL){
				perror("pwd");
				exit(2);
				}
				(void)printf("%s\n",cwd);
				}
			else{
				if(dirname[0]=='.'){
				dirname+=2;
				
				printf("%s/\n", dirname);
				dirname-=2;
				}
				else (void)printf("%s/\n", dirname);
			    }
		while ( ( direntp = readdir( dir_ptr ) ) != NULL )
		if ((strcmp(direntp->d_name,"."))!=0 && (strcmp(direntp->d_name,".."))!=0)
		{
			dostat(dirname, direntp->d_name,count );
		}closedir(dir_ptr);
	}
}

void dostat(char* directoryName, char *filename ,int count )
{
	struct stat info;
	char path[128];
	
	sprintf(path, "%s/%s",directoryName,filename);
	if ( stat(path, &info) == -1 )		/* cannot stat	 */
		perror( path );			/* say why	 */
	else					/* else show info	 */
		show_file_info( path, &info,filename);
}

void show_file_info( char *path, struct stat *info_p, char* fname2, int count )
/*
 * display the info about 'filename'.  The info is stored in struct at *info_p
 */
{
	int sizetest;
	int condition=count;
	
	while(condition>0){
	printf("    ");
	condition--;
	}
	
	char	*uid_to_name(), *ctime(), *gid_to_name(), *filemode();
	
	void	mode_to_letters();
        char    modestr[11];

	mode_to_letters( info_p->st_mode, modestr );
	
	//print file type
	if(modestr[0]=='d')//dir
	{do_ls(path,count);
	}
	else
	{
 printf( "%s"  , fname2 );
	
	
	//do_ls(path );


	if(modestr[0]!='d' && (modestr[3]=='x' || modestr[6]=='x' || modestr[9]=='x'))
	{ 	
	printf( "*");

	}
	//else(modestr[0]=='l')
	
	//{ printf("%s\n" , filename );}

}

/*
 * utility functions
 */

/*
 * This function takes a mode value and a char array
 * and puts into the char array the file type and the 
 * nine letters that correspond to the bits in mode.
 * NOTE: It does not code setuid, setgid, and sticky
 * codes
 */
void mode_to_letters( int mode, char str[] )
{
    strcpy( str, "----------" );           /* default=no perms */

    if ( S_ISDIR(mode) )  str[0] = 'd';    /* directory?       */
    if ( S_ISCHR(mode) )  str[0] = 'c';    /* char devices     */
    if ( S_ISBLK(mode) )  str[0] = 'b';    /* block device     */

    if ( mode & S_IRUSR ) str[1] = 'r';    /* 3 bits for user  */
    if ( mode & S_IWUSR ) str[2] = 'w';
    if ( mode & S_IXUSR ) str[3] = 'x';

    if ( mode & S_IRGRP ) str[4] = 'r';    /* 3 bits for group */
    if ( mode & S_IWGRP ) str[5] = 'w';
    if ( mode & S_IXGRP ) str[6] = 'x';

    if ( mode & S_IROTH ) str[7] = 'r';    /* 3 bits for other */
    if ( mode & S_IWOTH ) str[8] = 'w';
    if ( mode & S_IXOTH ) str[9] = 'x';
}

#include	<pwd.h>

char *uid_to_name( uid_t uid )
/* 
 *	returns pointer to username associated with uid, uses getpw()
 */	
{
	struct	passwd *getpwuid(), *pw_ptr;
	static  char numstr[10];

	if ( ( pw_ptr = getpwuid( uid ) ) == NULL ){
		sprintf(numstr,"%d", uid);
		return numstr;
	}
	else
		return pw_ptr->pw_name ;
}

#include	<grp.h>

char *gid_to_name( gid_t gid )
/*
 *	returns pointer to group number gid. used getgrgid(3)
 */
{
	struct group *getgrgid(), *grp_ptr;
	static  char numstr[10];

	if ( ( grp_ptr = getgrgid(gid) ) == NULL ){
		sprintf(numstr,"%d", gid);
		return numstr;
	}
	else
		return grp_ptr->gr_name;
}

Perderabo · #2 (**permalink**) 02-28-2007

Please read the rules:

(6) Do not post classroom or homework problems.

But I'll give you a couple of hints. The last line in function dostat is a call to show_file_info, but there are only two args. The function show_file_info is just below that and you can see that it uses fore args. And in show_file_info you have

Code:

	//print file type
	if(modestr[0]=='d')//dir
	{do_ls(path,count);
	}
	else
	{
 printf( "%s"  , fname2 );

You need a } after that.

matrixmadhan · #3 (**permalink**) 03-01-2007

Code:

#include	<stdio.h>
#include	<pwd.h>
#include	<grp.h>
#include	<sys/types.h>
#include	<dirent.h>
#include	<sys/stat.h>
#include	<time.h>
#include	<unistd.h>

void do_ls(char[], int);
void dostat(char *,char *,int);
void show_file_info( char *, struct stat *,char *,int);
void mode_to_letters( int , char [] );
char *uid_to_name( uid_t );
char *gid_to_name( gid_t );

int main(int ac, char *av[])
{	
	//char c;
	//int flag=0;
	int counter=0;
	//if(ch == 's'){flag =1;}
	if ( ac == 1 )
		do_ls( ".",counter );
	else
		while ( --ac ){
			++av;
			do_ls( *av,counter );
		}
  return 0;
}

void do_ls( char dirname[] ,int count)
/*
 *	list files in directory called dirname
 */
{
	DIR		*dir_ptr;		/* the directory */
	struct dirent	*direntp;		/* each entry	 */
	char *cwd;
	count++;

	if ( ( dir_ptr = opendir( dirname ) ) == NULL )
		fprintf(stderr,"ls1: cannot open %s\n", dirname);
	else
	{
		if(dirname=="."){
			if((cwd= getcwd(NULL,64))==NULL){
				perror("pwd");
				exit(2);
				}
				(void)printf("%s\n",cwd);
				}
			else{
				if(dirname[0]=='.'){
				dirname+=2;
				
				printf("%s/\n", dirname);
				dirname-=2;
				}
				else (void)printf("%s/\n", dirname);
			    }
		while ( ( direntp = readdir( dir_ptr ) ) != NULL )
		if ((strcmp(direntp->d_name,"."))!=0 && (strcmp(direntp->d_name,".."))!=0)
		{
			dostat(dirname, direntp->d_name,count );
		}closedir(dir_ptr);
	}
}

void dostat(char* directoryName, char *filename ,int count )
{
	struct stat info;
	char path[128];

	sprintf(path, "%s/%s",directoryName,filename);
	if ( stat(path, &info) == -1 )		/* cannot stat	 */
		perror( path );			/* say why	 */
	else					/* else show info	 */
        {
           show_file_info( path, &info,filename, count);
        }
}

void show_file_info( char *path, struct stat *info_p, char* fname2, int count )
/*
 * display the info about 'filename'.  The info is stored in struct at *info_p
 */
{
	int sizetest;
	int condition=count;
	
	while(condition>0){
	printf("    ");
	condition--;
	}
	
	//char	*uid_to_name(), *ctime(), *gid_to_name(), *filemode();
	
	//void	mode_to_letters();
        char    modestr[11];

	mode_to_letters( info_p->st_mode, modestr );
	
	//print file type
	if(modestr[0]=='d')//dir
	{do_ls(path,count);
	}
	else
	{
             printf( "%s"  , fname2 );
	
	     if(modestr[0]!='d' && (modestr[3]=='x' || modestr[6]=='x' || modestr[9]=='x'))
	     { 	
	       printf( "*");
	     }
        }
}

/*
 * utility functions
 */

/*
 * This function takes a mode value and a char array
 * and puts into the char array the file type and the 
 * nine letters that correspond to the bits in mode.
 * NOTE: It does not code setuid, setgid, and sticky
 * codes
 */
void mode_to_letters( int mode, char str[] )
{
    strcpy( str, "----------" );           /* default=no perms */

    if ( S_ISDIR(mode) )  str[0] = 'd';    /* directory?       */
    if ( S_ISCHR(mode) )  str[0] = 'c';    /* char devices     */
    if ( S_ISBLK(mode) )  str[0] = 'b';    /* block device     */

    if ( mode & S_IRUSR ) str[1] = 'r';    /* 3 bits for user  */
    if ( mode & S_IWUSR ) str[2] = 'w';
    if ( mode & S_IXUSR ) str[3] = 'x';

    if ( mode & S_IRGRP ) str[4] = 'r';    /* 3 bits for group */
    if ( mode & S_IWGRP ) str[5] = 'w';
    if ( mode & S_IXGRP ) str[6] = 'x';

    if ( mode & S_IROTH ) str[7] = 'r';    /* 3 bits for other */
    if ( mode & S_IWOTH ) str[8] = 'w';
    if ( mode & S_IXOTH ) str[9] = 'x';
}


char *uid_to_name( uid_t uid )
/* 
 *	returns pointer to username associated with uid, uses getpw()
 */	
{
	struct	passwd *getpwuid(), *pw_ptr;
	static  char numstr[10];

	if ( ( pw_ptr = getpwuid( uid ) ) == NULL ){
		sprintf(numstr,"%d", uid);
		return numstr;
	}
	else
		return pw_ptr->pw_name ;
}


char *gid_to_name( gid_t gid )
/*
 *	returns pointer to group number gid. used getgrgid(3)
 */
{
	struct group *getgrgid(), *grp_ptr;
	static  char numstr[10];

	if ( ( grp_ptr = getgrgid(gid) ) == NULL ){
		sprintf(numstr,"%d", gid);
		return numstr;
	}
	else
		return grp_ptr->gr_name;
}

All your compilation problems are free now.

Try it out, and let us know for any difficulty or problems

More UNIX and Linux Forum Topics You Might Find Helpful
Thread	Thread Starter	Forum	Replies	Last Post
Protecting the directory tree	rooneyl	UNIX for Dummies Questions & Answers	2	02-17-2008 05:59 PM
directory tree	ravi raj kumar	Shell Programming and Scripting	3	01-24-2008 01:08 PM
Searching directory tree	blane	Shell Programming and Scripting	7	05-29-2007 07:30 PM
Space Used by Directory Tree	johnk99	Filesystems, Disks and Memory	1	07-22-2002 12:30 PM
Directory tree search???	solvman	High Level Programming	3	09-28-2001 01:27 PM

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes	Rate This Thread
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode	Rate This Thread:


	Powered by