[c] How do I execute a Shell built-in command with a C function?

You can use the excecl command

int execl(const char *path, const char *arg, ...);

Like shown here

#include <stdio.h>
#include <unistd.h>
#include <dirent.h>

int main (void) {

   return execl ("/bin/pwd", "pwd", NULL);

}

The second argument will be the name of the process as it will appear in the process table.

Alternatively, you can use the getcwd() function to get the current working directory:

#include <stdio.h>
#include <unistd.h>
#include <dirent.h>
#define MAX 255

int main (void) {
char wd[MAX];
wd[MAX-1] = '\0';

if(getcwd(wd, MAX-1) == NULL) {
  printf ("Can not get current working directory\n");
}
else {
  printf("%s\n", wd);
}
  return 0;
}

Examples related to c

conflicting types for 'outchar' Can't compile C program on a Mac after upgrade to Mojave Program to find largest and second largest number in array Prime numbers between 1 to 100 in C Programming Language In c, in bool, true == 1 and false == 0? How I can print to stderr in C? Visual Studio Code includePath "error: assignment to expression with array type error" when I assign a struct field (C) Compiling an application for use in highly radioactive environments How can you print multiple variables inside a string using printf?

Examples related to shell

Comparing a variable with a string python not working when redirecting from bash script Get first line of a shell command's output How to run shell script file using nodejs? Run bash command on jenkins pipeline Way to create multiline comments in Bash? How to do multiline shell script in Ansible How to check if a file exists in a shell script How to check if an environment variable exists and get its value? Curl to return http status code along with the response docker entrypoint running bash script gets "permission denied"

Examples related to command

'ls' is not recognized as an internal or external command, operable program or batch file Command to run a .bat file how to run python files in windows command prompt? Run a command shell in jenkins How to recover the deleted files using "rm -R" command in linux server? Split text file into smaller multiple text file using command line ansible : how to pass multiple commands Jmeter - Run .jmx file through command line and get the summary report in a excel cocoapods - 'pod install' takes forever Daemon not running. Starting it now on port 5037

Examples related to exec

I do not understand how execlp() works in Linux Running a Python script from PHP How do I execute a Shell built-in command with a C function? What are the uses of the exec command in shell scripts? php exec() is not executing the command How to call execl() in C with the proper arguments? Run Bash Command from PHP PHP shell_exec() vs exec() Ruby, Difference between exec, system and %x() or Backticks How to execute an external program from within Node.js?

Examples related to pwd

How do I execute a Shell built-in command with a C function? shell init issue when click tab, what's wrong with getcwd? Windows equivalent to UNIX pwd