added mysqlmanager-pwgen

added set_exec_stdout and set_exec_stderr to mysqlmanager to be able 
to redirect stdout and stderr
added support for MY_FULL_IO to my_read, so we can tell it to read
a number of bytes in as many chunks as it takes instead of one try

client/mysqlmanager-pwgen.c

@@ -0,0 +1,153 @@
+/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+#define MANAGER_PWGEN_VERSION "1.0"
+
+#include <my_global.h>
+#include <m_ctype.h>
+#include <my_sys.h>
+#include <m_string.h>
+#include <mysql_version.h>
+#include <errno.h>
+#include <getopt.h>
+#include <md5.h>
+
+const char* outfile=0,*user="root";
+
+struct option long_options[] =
+{
+  {"output-file",required_argument,0,'o'},
+  {"user",required_argument,0,'u'},
+  {"help",no_argument,0,'?'},
+  {"version",no_argument,0,'V'},
+  {0,0,0,0}
+};
+
+static void die(const char* fmt, ...)
+{
+  va_list args;
+  DBUG_ENTER("die");
+  va_start(args, fmt);
+  if (fmt)
+  {
+    fprintf(stderr, "%s: ", my_progname);
+    vfprintf(stderr, fmt, args);
+    fprintf(stderr, "\n");
+    fflush(stderr);
+  }
+  va_end(args);
+  exit(1);
+}
+
+static void print_version(void)
+{
+  printf("%s  Ver %s Distrib %s, for %s (%s)\n",my_progname,
+	 MANAGER_PWGEN_VERSION,
+	 MYSQL_SERVER_VERSION,SYSTEM_TYPE,MACHINE_TYPE);
+}
+
+void usage()
+{
+  print_version();
+  printf("MySQL AB, by Sasha\n");
+  printf("This software comes with ABSOLUTELY NO WARRANTY\n\n");
+  printf("Generates a password file to be used by mysqltest.\n\n");
+  printf("Usage: %s [OPTIONS]\n", my_progname);
+  printf("-?,--help     Display this message and exit\n\
+-V,--version    Display version info\n\
+-u,--user=      Put given user in the password file\n\
+-o,--output-file= Write the output to the file with the given name\n");
+}
+
+int parse_args(int argc, char** argv)
+{
+  int c,option_index=0;
+  while ((c=getopt_long(argc,argv,"?Vu:o:",long_options,&option_index))
+	 != EOF)
+  {
+    switch (c)
+    {
+    case 'o':
+      outfile=optarg;
+      break;
+    case 'u':
+      user=optarg;
+      break;
+    case '?':
+      usage();
+      exit(0);
+    case 'V':
+      print_version();
+      exit(0);
+    default:
+      usage();
+      exit(1);
+    }
+  }
+  return 0;
+}
+
+void get_pass(char* pw, int len)
+{
+  FILE* fp;
+  char* pw_end=pw+len;
+/* /dev/random is more secure than  rand() because the seed is easy to
+ predict, so we resort to rand() only if /dev/random is not available */
+  if ((fp=fopen("/dev/random","r")))
+  {
+    fread(pw,len,1,fp);
+    fclose(fp);
+    while (pw<pw_end)
+    {
+      *pw++='a'+((uint)*pw % 26);
+    }
+  }
+  else
+  {
+    srand(time(NULL));
+    while (pw<pw_end)
+      *pw++='a'+((uint)rand() % 26);
+  }
+  *pw_end=0;
+}
+
+int main(int argc, char** argv)
+{
+  FILE* fp;
+  my_MD5_CTX context;
+  uchar digest[16];
+  char pw[17];
+  uint i;
+  
+  MY_INIT(argv[0]);
+  parse_args(argc,argv);
+  if (!outfile)
+    die("Missing --output-file");
+  
+  if (!(fp=fopen(outfile,"w")))
+    die("Could not open '%s'(errno=%d)",outfile,errno);
+  get_pass(pw,sizeof(pw)-1);
+  my_MD5Init(&context);
+  my_MD5Update(&context,pw,sizeof(pw)-1);
+  my_MD5Final(digest,&context);
+  fprintf(fp,"%s:",user);
+  for (i=0;i<sizeof(digest);i++)
+    fprintf(fp,"%02x",digest[i]);
+  fprintf(fp,"\n");
+  fclose(fp);
+  printf("%s\n",pw);
+  return 0;
+}