| SYSTEM(3) | Library Functions Manual | SYSTEM(3) | 
system —
#include <stdlib.h>
int
  
  system(const
    char *string);
system() function hands the argument
  string to the command interpreter
  sh(1). The calling process waits for
  the shell to finish executing the command, ignoring
  SIGINT and SIGQUIT, and
  blocking SIGCHLD.
If string is a NULL
    pointer, system() will return non-zero, if the
    command interpreter is available, or zero if none is available. Otherwise,
    system() returns the termination status of the shell
    in the format specified by
    waitpid(2).
system() returns -1 and sets
  errno to indicate the error. If execution of the shell
  fails, system() returns the termination status for a
  program that terminates with a call of
  exit(127).
system() function conforms to ANSI
  X3.159-1989 (“ANSI C89”) and IEEE
  Std 1003.2-1992 (“POSIX.2”).
system() function with a command
  containing any part of an unsanitized user-supplied string. Shell
  meta-characters present will be honored by the
  sh(1) command interpreter.
| August 2, 2007 | NetBSD 9.3 |