lib/exec_shell.c

   1 #include <stdlib.h>
   2 #include <string.h>
   3 #include <unistd.h>
   4 #include <sys/types.h>
   5
   6 #include "nls.h"
   7 #include "c.h"
   8 #include "xalloc.h"
   9
  10 #include "exec_shell.h"
  11
  12 #define DEFAULT_SHELL "/bin/sh"
  13
  14 void __attribute__((__noreturn__)) exec_shell(void) {
  15         const char *shell = getenv("SHELL"), *shell_basename;
  16         char *arg0;
  17         if (!shell)
  18                 shell = DEFAULT_SHELL;
  19
  20         shell_basename = basename(shell);
  21         arg0 = xmalloc(strlen(shell_basename) + 2);
  22         arg0[0] = '-';
  23         strcpy(arg0 + 1, shell_basename);
  24
  25         execl(shell, arg0, NULL);
  26         err(EXIT_FAILURE, _("failed to execute %s"), shell);
  27 }