[SOLVED] change permissions in C by using exec()

Issue

How can I implement chmod command on file by using exec? I would appreciate if anyone can provide me a code.

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Solution

try this: http://support.sas.com/documentation/onlinedoc/sasc/doc/lr2/execve.htm also see: http://linux.about.com/library/cmd/blcmdl3_execvp.htm

  #include <sys/types.h>
  #include <unistd.h>
  #include <stdio.h>

  main()
  {
     pid_t pid;
     char *parmList[] = {"/bin/chmod", "0700", "/home/op/biaoaai/bead",NULL}; 

     if ((pid = fork()) ==-1) //fork failed
        perror("fork error");
     else if (pid == 0) { //child (pid==0 if child)
        execvp("chmod", parmList);
        printf("Return not expected. Must be an execve error.n");
     } else { //parent (pid==child process)
        //parent specific code goes here
     }
  }

Edit: I never actually compiled... updated with users working paramList.

Answered By - user295190

Answer Checked By - Terry (WPSolving Volunteer)