proc.c

   1 #include <sys/types.h>
   2 #include <string.h>
   3 #include <stdio.h>
   4 #include <errno.h>
   5 #include <stdlib.h>
   6
   7 #include "common.h"
   8
   9 Process *
  10 open_program(char *filename, pid_t pid) {
  11         Process *proc;
  12         proc = calloc(sizeof(Process), 1);
  13         if (!proc) {
  14                 perror("malloc");
  15                 exit(1);
  16         }
  17         proc->filename = strdup(filename);
  18         proc->breakpoints_enabled = -1;
  19         if (pid) {
  20                 proc->pid = pid;
  21         }
  22         breakpoints_init(proc);
  23
  24         proc->next = list_of_processes;
  25         list_of_processes = proc;
  26         return proc;
  27 }
  28
  29 void
  30 open_pid(pid_t pid) {
  31         Process *proc;
  32         char *filename;
  33
  34         if (trace_pid(pid) < 0) {
  35                 fprintf(stderr, "Cannot attach to pid %u: %s\n", pid,
  36                         strerror(errno));
  37                 return;
  38         }
  39
  40         filename = pid2name(pid);
  41
  42         if (!filename) {
  43                 fprintf(stderr, "Cannot trace pid %u: %s\n", pid,
  44                                 strerror(errno));
  45                 return;
  46         }
  47
  48         proc = open_program(filename, pid);
  49         continue_process(pid);
  50         proc->breakpoints_enabled = 1;
  51 }
  52
  53 Process *
  54 pid2proc(pid_t pid) {
  55         Process *tmp;
  56
  57         tmp = list_of_processes;
  58         while (tmp) {
  59                 if (pid == tmp->pid) {
  60                         return tmp;
  61                 }
  62                 tmp = tmp->next;
  63         }
  64         return NULL;
  65 }