tools/tesh2/src/is_cmd.c

   1 #include <is_cmd.h>
   2
   3 #include <explode.h>
   4
   5 int
   6 is_cmd(char** path, char** builtin, const char* p)
   7 {
   8         size_t i = 0;
   9         size_t j = 0;
  10         int yes = 0;
  11
  12         struct stat stat_buff = {0};
  13         char command[PATH_MAX + 1] = {0};
  14         char buff[PATH_MAX + 1] = {0};
  15         size_t len;
  16
  17         if(!p)
  18                 return EINVAL;
  19
  20         len = strlen(p);
  21         while(i < len)
  22         {
  23                 if(p[i] != ' ' && p[i] != '\t' && p[i] != '>')
  24                         command[j++] = p[i];
  25                 else
  26                         break;
  27
  28                 i++;
  29         }
  30
  31
  32         /* check first if it's a shell buitin */
  33
  34         if(builtin)
  35         {
  36                 for(i = 0; builtin[i] != NULL; i++)
  37                 {
  38                         if(!strcmp(builtin[i], command))
  39                                 return 0;
  40                 }
  41         }
  42
  43         if(stat(command, &stat_buff) || !S_ISREG(stat_buff.st_mode))
  44         {
  45                 if(path)
  46                 {
  47                         for (i = 0; path[i] != NULL; i++)
  48                         {
  49
  50                                 sprintf(buff,"%s/%s",path[i], command);
  51
  52                                 if(!stat(buff, &stat_buff) && S_ISREG(stat_buff.st_mode))
  53                                 {
  54
  55                                         if(!access(buff, X_OK))
  56                                         {
  57                                                 yes = 1;
  58                                                 break;
  59                                         }
  60                                 }
  61                         }
  62                 }
  63         }
  64         else
  65         {
  66
  67                 if(!access(command, X_OK))
  68                         yes = 1;
  69         }
  70
  71         return yes ? 0 : ECMDNOTFOUND;
  72 }
  73