Line data    Source code

       1             : #include "background_manager.h"
       2             : 
       3             : static BackgroundProcess background_processes[MAX_BACKGROUND_PROCESSES];
       4             : static size_t num_background_processes = 0;
       5             : 
       6          18 : void check_completed_background_processes()
       7             : {
       8          18 :     size_t i = 0;
       9          20 :     while (i < num_background_processes)
      10             :     {
      11           2 :         pid_t pid = background_processes[i].pid;
      12             :         int status;
      13           2 :         int result = waitpid(pid, &status, WNOHANG);
      14           2 :         if (result == -1)
      15             :         {
      16           0 :             perror("waitpid");
      17             :         }
      18           2 :         else if (result > 0)
      19             :         { // The process with PID 'pid' has completed
      20             :             // Display the correct symbol based on the exit status
      21           1 :             char symbol = i == num_background_processes - 1 ? '+' : i == num_background_processes - 2 ? '-'
      22             :                                                                                                       : ' ';
      23           1 :             printf("[%d]%c  Done                    %s\n", background_processes[i].job_number, symbol, background_processes[i].command);
      24             : 
      25             :             // Free the memory for the completed process command
      26           1 :             free(background_processes[i].command);
      27             : 
      28             :             // Remove the completed process from the list
      29           1 :             for (size_t j = i; j < num_background_processes - 1; ++j)
      30             :             {
      31           0 :                 background_processes[j] = background_processes[j + 1];
      32             :             }
      33           1 :             num_background_processes--;
      34             :         }
      35             :         else
      36             :         {
      37             :             // Move to the next background process if the current one hasn't completed
      38           1 :             i++;
      39             :         }
      40             :     }
      41          18 : }
      42             : 
      43           1 : void add_background_process(pid_t pid, const Command *command)
      44             : {
      45           1 :     background_processes[num_background_processes].pid = pid;
      46           1 :     background_processes[num_background_processes].job_number = num_background_processes + 1;
      47           1 :     background_processes[num_background_processes].command = strdup(command->input_string);
      48             : 
      49           1 :     if (background_processes[num_background_processes].command == NULL) {
      50           0 :         perror("strdup");
      51           0 :         exit(EXIT_FAILURE);
      52             :     }    
      53             :     
      54           1 :     printf("[%d] %d %s\n", background_processes[num_background_processes].job_number, pid, background_processes[num_background_processes].command);
      55           1 :     num_background_processes++;
      56           1 : }