granicus.if.org Git - strace/blob - execve.c

   1 #include "defs.h"
   2
   3 static void
   4 printargv(struct tcb *tcp, long addr)
   5 {
   6         union {
   7                 unsigned int p32;
   8                 unsigned long p64;
   9                 char data[sizeof(long)];
  10         } cp;
  11         const char *sep;
  12         unsigned int n = 0;
  13         unsigned wordsize = current_wordsize;
  14
  15         cp.p64 = 1;
  16         for (sep = ""; !abbrev(tcp) || n < max_strlen / 2; sep = ", ", ++n) {
  17                 if (umoven(tcp, addr, wordsize, cp.data) < 0) {
  18                         tprintf("%#lx", addr);
  19                         return;
  20                 }
  21                 if (wordsize == 4)
  22                         cp.p64 = cp.p32;
  23                 if (cp.p64 == 0)
  24                         break;
  25                 tprints(sep);
  26                 printstr(tcp, cp.p64, -1);
  27                 addr += wordsize;
  28         }
  29         if (cp.p64)
  30                 tprintf("%s...", sep);
  31 }
  32
  33 static void
  34 printargc(const char *fmt, struct tcb *tcp, long addr)
  35 {
  36         int count;
  37         char *cp;
  38
  39         for (count = 0; umove(tcp, addr, &cp) >= 0 && cp != NULL; count++) {
  40                 addr += sizeof(char *);
  41         }
  42         tprintf(fmt, count, count == 1 ? "" : "s");
  43 }
  44
  45 SYS_FUNC(execve)
  46 {
  47         if (entering(tcp)) {
  48                 printpath(tcp, tcp->u_arg[0]);
  49                 if (!verbose(tcp))
  50                         tprintf(", %#lx", tcp->u_arg[1]);
  51                 else {
  52                         tprints(", [");
  53                         printargv(tcp, tcp->u_arg[1]);
  54                         tprints("]");
  55                 }
  56                 if (!verbose(tcp))
  57                         tprintf(", %#lx", tcp->u_arg[2]);
  58                 else if (abbrev(tcp))
  59                         printargc(", [/* %d var%s */]", tcp, tcp->u_arg[2]);
  60                 else {
  61                         tprints(", [");
  62                         printargv(tcp, tcp->u_arg[2]);
  63                         tprints("]");
  64                 }
  65         }
  66         return 0;
  67 }
  68
  69 #if defined(SPARC) || defined(SPARC64)
  70 SYS_FUNC(execv)
  71 {
  72         if (entering(tcp)) {
  73                 printpath(tcp, tcp->u_arg[0]);
  74                 if (!verbose(tcp))
  75                         tprintf(", %#lx", tcp->u_arg[1]);
  76                 else {
  77                         tprints(", [");
  78                         printargv(tcp, tcp->u_arg[1]);
  79                         tprints("]");
  80                 }
  81         }
  82         return 0;
  83 }
  84 #endif /* SPARC || SPARC64 */