release/src/router/pptpd/inststr.c

   1 /*
   2  * inststr.c
   3  *
   4  * Little function to change the name of a process
   5  *
   6  * Originally from C. S. Ananian's pptpclient
   7  *
   8  * $Id: inststr.c,v 1.2 2004/04/22 10:48:16 quozl Exp $
   9  */
  10
  11 #ifdef HAVE_CONFIG_H
  12 #include "config.h"
  13 #endif
  14
  15 #ifndef HAVE_SETPROCTITLE
  16 #include "inststr.h"
  17 #include "compat.h"
  18 #include <string.h>
  19
  20 void inststr(int argc, char **argv, char *src)
  21 {
  22         if (strlen(src) <= strlen(argv[0])) {
  23                 char *ptr, **pptr;
  24
  25                 for (ptr = argv[0]; *ptr; *(ptr++) = '\0')
  26                         ;
  27                 strcpy(argv[0], src);
  28                 for (pptr = argv + 1; *pptr; pptr++)
  29                         for (ptr = *pptr; *ptr; *(ptr++) = '\0')
  30                                 ;
  31         } else {
  32                 /* Originally from the source to perl 4.036 (assigning to $0) */
  33                 char *ptr, *ptr2;
  34                 int count;
  35
  36                 ptr = argv[0] + strlen(argv[0]);
  37                 for (count = 1; count < argc; count++) {
  38                         if (argv[count] == ptr + 1) {
  39                                 ptr++;
  40                                 ptr += strlen(ptr);
  41                         }
  42                 }
  43                 count = 0;
  44                 for (ptr2 = argv[0]; ptr2 <= ptr; ptr2++) {
  45                         *ptr2 = '\0';
  46                         count++;
  47                 }
  48                 strlcpy(argv[0], src, count);
  49         }
  50 }
  51 #endif  /* !HAVE_SETPROCTITLE */