winsup/cygwin/exec.cc

   1 /* exec.cc: exec system call support.
   2
   3 This file is part of Cygwin.
   4
   5 This software is a copyrighted work licensed under the terms of the
   6 Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
   7 details. */
   8
   9 #include "winsup.h"
  10 #include <process.h>
  11 #include "cygerrno.h"
  12 #include "path.h"
  13 #include "environ.h"
  14 #include "sync.h"
  15 #include "fhandler.h"
  16 #include "dtable.h"
  17 #include "pinfo.h"
  18 #include "cygheap.h"
  19 #include "winf.h"
  20
  21 extern "C" int
  22 execl (const char *path, const char *arg0, ...)
  23 {
  24   int i;
  25   va_list args;
  26   const char *argv[1024];
  27
  28   va_start (args, arg0);
  29   argv[0] = arg0;
  30   i = 1;
  31   do
  32       argv[i] = va_arg (args, const char *);
  33   while (argv[i++] != NULL);
  34   va_end (args);
  35   return spawnve (_P_OVERLAY, path, (char * const  *) argv, environ);
  36 }
  37
  38 extern "C" int
  39 execle (const char *path, const char *arg0, ...)
  40 {
  41   int i;
  42   va_list args;
  43   const char *argv[1024];
  44   const char * const *envp;
  45
  46   va_start (args, arg0);
  47   argv[0] = arg0;
  48   i = 1;
  49   do
  50       argv[i] = va_arg (args, const char *);
  51   while (argv[i++] != NULL);
  52   envp = va_arg (args, const char * const *);
  53   va_end (args);
  54   return spawnve (_P_OVERLAY, path, (char * const  *) argv, envp);
  55 }
  56
  57 extern "C" int
  58 execlp (const char *file, const char *arg0, ...)
  59 {
  60   int i;
  61   va_list args;
  62   const char *argv[1024];
  63   path_conv buf;
  64
  65   va_start (args, arg0);
  66   argv[0] = arg0;
  67   i = 1;
  68   do
  69       argv[i] = va_arg (args, const char *);
  70   while (argv[i++] != NULL);
  71   va_end (args);
  72   return spawnve (_P_OVERLAY | _P_PATH_TYPE_EXEC,
  73                   find_exec (file, buf, "PATH", FE_NNF) ?: "",
  74                   (char * const  *) argv, environ);
  75 }
  76
  77 extern "C" int
  78 execv (const char *path, char * const *argv)
  79 {
  80   return spawnve (_P_OVERLAY, path, argv, environ);
  81 }
  82
  83 extern "C" int
  84 execve (const char *path, char *const argv[], char *const envp[])
  85 {
  86   return spawnve (_P_OVERLAY, path, argv, envp);
  87 }
  88 EXPORT_ALIAS (execve, _execve)  /* For newlib */
  89
  90 extern "C" int
  91 execvp (const char *file, char * const *argv)
  92 {
  93   path_conv buf;
  94
  95   return spawnve (_P_OVERLAY | _P_PATH_TYPE_EXEC,
  96                   find_exec (file, buf, "PATH", FE_NNF) ?: "",
  97                   argv, environ);
  98 }
  99
 100 extern "C" int
 101 execvpe (const char *file, char * const *argv, char *const *envp)
 102 {
 103   path_conv buf;
 104
 105   return spawnve (_P_OVERLAY | _P_PATH_TYPE_EXEC,
 106                   find_exec (file, buf, "PATH", FE_NNF) ?: "",
 107                   argv, envp);
 108 }
 109
 110 extern "C" int
 111 fexecve (int fd, char * const *argv, char *const *envp)
 112 {
 113   cygheap_fdget cfd (fd);
 114   if (cfd < 0)
 115     {
 116       syscall_printf ("-1 = fexecve (%d, %p, %p)", fd, argv, envp);
 117       return -1;
 118     }
 119
 120   return spawnve (_P_OVERLAY, cfd->pc.get_win32 (), argv, envp);
 121 }
 122
 123 extern "C" pid_t
 124 sexecve_is_bad ()
 125 {
 126   set_errno (ENOSYS);
 127   return 0;
 128 }