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/* ------------------------------------------------------------------
* fileop.c
* File related operations, such as searching file in path, list of
* files in some dir.
* ----------------------------------------------------------------*/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "test_commands.h"
#define MAX_FILEPATH_LENGTH (256)
/* to check wether a given name is a directory or not
* Input:
* - name: the name to be checked.
Return:
* - 1: if is a directory
* - 0: if not a directory, or file <name> doesn't exist, error
*/
static int is_dir(const char* name)
{
struct stat buf;
if (lstat(name, &buf) < 0)
return 0; /* if not exist, error */
/*if is directory return 1 ,else return 0*/
return S_ISDIR(buf.st_mode);
}
/* search target file with <name> in directory <path>
* Input:
* - path: the path to be searched in
* - name: file name to be searched
* Return:
* - -1： error
* - 1: found
* - 0: not found
*/
int search_file(const char* path, const char* name)
{
int ret = -1;
DIR* directory;
struct dirent* dir_entry;
char current_filename[MAX_FILEPATH_LENGTH];
TDBG("Enter %s. name=%s; path=%s\n", __FUNCTION__, name, path);
if ((directory = opendir(path)) == NULL) {
printf("Error opendir(%s)\n", path);
return -1;
}
while (dir_entry = readdir(directory)) {
TDBG("dir_entry->d_name is \"%s\"\n", dir_entry->d_name);
/* To check wether this is a directory */
if (!strcmp(dir_entry->d_name, ".") ||
!strcmp(dir_entry->d_name, "..")) {
/* skip */
continue;
}
else {
/* if is root directory */
if ((strcmp(path, "/")) == 0)
ret = snprintf(current_filename, MAX_FILEPATH_LENGTH, "%s%s", path, dir_entry->d_name);
/* if is not root directory */
else
ret = snprintf(current_filename, MAX_FILEPATH_LENGTH, "%s%s", path, dir_entry->d_name);
/* check if truncated */
if (ret >= MAX_FILEPATH_LENGTH) {
printf("Critical error: exceed MAX_FILEPATH_LENGTH.\n");
closedir(directory);
return -1;
}
}
TDBG("Now tracking file (full path): %s\n", current_filename);
/* if is a directory, recursively call search_file */
if (is_dir(current_filename)) {
ret = search_file(current_filename, name);
if (ret == 1) {
TDBG("File: %s is found in directory %s\n", name, current_filename);
closedir(directory);
return ret;
}
}
else {
if (strcmp(dir_entry->d_name, name) == 0) {
TDBG("File: %s is found in directory %s.\n", name, current_filename);
closedir(directory);
return 1;
}
}
}
closedir(directory);
/* no findings */
return 0;
}
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