I'm making a C program where I need to get the directory that the program is started from. This program is written for UNIX computers. I've been looking at opendir() and telldir(), but telldir() returns a off_t (long int), so it really doesn't help me.
How can I get the current path in a string (char array)?
This question is related to
c
unix
working-directory
#include <stdio.h> /* defines FILENAME_MAX */
//#define WINDOWS /* uncomment this line to use it for windows.*/
#ifdef WINDOWS
#include <direct.h>
#define GetCurrentDir _getcwd
#else
#include <unistd.h>
#define GetCurrentDir getcwd
#endif
int main(){
char buff[FILENAME_MAX];
GetCurrentDir( buff, FILENAME_MAX );
printf("Current working dir: %s\n", buff);
return 1;
}
To get current directory (where you execute your target program), you can use the following example code, which works for both Visual Studio and Linux/MacOS(gcc/clang), both C and C++:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined(_MSC_VER)
#include <direct.h>
#define getcwd _getcwd
#elif defined(__GNUC__)
#include <unistd.h>
#endif
int main() {
char* buffer;
if( (buffer=getcwd(NULL, 0)) == NULL) {
perror("failed to get current directory\n");
} else {
printf("%s \nLength: %zu\n", buffer, strlen(buffer));
free(buffer);
}
return 0;
}
#include <stdio.h> /* defines FILENAME_MAX */
//#define WINDOWS /* uncomment this line to use it for windows.*/
#ifdef WINDOWS
#include <direct.h>
#define GetCurrentDir _getcwd
#else
#include <unistd.h>
#define GetCurrentDir getcwd
#endif
int main(){
char buff[FILENAME_MAX];
GetCurrentDir( buff, FILENAME_MAX );
printf("Current working dir: %s\n", buff);
return 1;
}
To get current directory (where you execute your target program), you can use the following example code, which works for both Visual Studio and Linux/MacOS(gcc/clang), both C and C++:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined(_MSC_VER)
#include <direct.h>
#define getcwd _getcwd
#elif defined(__GNUC__)
#include <unistd.h>
#endif
int main() {
char* buffer;
if( (buffer=getcwd(NULL, 0)) == NULL) {
perror("failed to get current directory\n");
} else {
printf("%s \nLength: %zu\n", buffer, strlen(buffer));
free(buffer);
}
return 0;
}
Look up the man page for getcwd.
Use getcwd
#include <stdio.h> /* defines FILENAME_MAX */
//#define WINDOWS /* uncomment this line to use it for windows.*/
#ifdef WINDOWS
#include <direct.h>
#define GetCurrentDir _getcwd
#else
#include <unistd.h>
#define GetCurrentDir getcwd
#endif
int main(){
char buff[FILENAME_MAX];
GetCurrentDir( buff, FILENAME_MAX );
printf("Current working dir: %s\n", buff);
return 1;
}
OR
#include<stdio.h>
#include<unistd.h>
#include<stdlib.h>
main() {
char *buf;
buf=(char *)malloc(100*sizeof(char));
getcwd(buf,100);
printf("\n %s \n",buf);
}
Look up the man page for getcwd.
Note that getcwd(3) is also available in Microsoft's libc: getcwd(3), and works the same way you'd expect.
Must link with -loldnames (oldnames.lib, which is done automatically in most cases), or use _getcwd(). The unprefixed version is unavailable under Windows RT.
Use getcwd
#include <stdio.h> /* defines FILENAME_MAX */
//#define WINDOWS /* uncomment this line to use it for windows.*/
#ifdef WINDOWS
#include <direct.h>
#define GetCurrentDir _getcwd
#else
#include <unistd.h>
#define GetCurrentDir getcwd
#endif
int main(){
char buff[FILENAME_MAX];
GetCurrentDir( buff, FILENAME_MAX );
printf("Current working dir: %s\n", buff);
return 1;
}
OR
#include<stdio.h>
#include<unistd.h>
#include<stdlib.h>
main() {
char *buf;
buf=(char *)malloc(100*sizeof(char));
getcwd(buf,100);
printf("\n %s \n",buf);
}
Although the question is tagged Unix, people also get to visit it when their target platform is Windows, and the answer for Windows is the GetCurrentDirectory() function:
DWORD WINAPI GetCurrentDirectory(
_In_ DWORD nBufferLength,
_Out_ LPTSTR lpBuffer
);
These answers apply to both C and C++ code.
Link suggested by user4581301 in a comment to another question, and verified as the current top choice with a Google search 'site:microsoft.com getcurrentdirectory'.
Look up the man page for getcwd.
Although the question is tagged Unix, people also get to visit it when their target platform is Windows, and the answer for Windows is the GetCurrentDirectory() function:
DWORD WINAPI GetCurrentDirectory(
_In_ DWORD nBufferLength,
_Out_ LPTSTR lpBuffer
);
These answers apply to both C and C++ code.
Link suggested by user4581301 in a comment to another question, and verified as the current top choice with a Google search 'site:microsoft.com getcurrentdirectory'.
Source: Stackoverflow.com