[thirdparty/cups.git] / systemv / lppasswd.c

/*
 * "$Id: lppasswd.c 177 2006-06-21 00:20:03Z jlovell $"
 *
 *   MD5 password program for the Common UNIX Printing System (CUPS).
 *
 *   Copyright 1997-2006 by Easy Software Products.
 *
 *   These coded instructions, statements, and computer programs are the
 *   property of Easy Software Products and are protected by Federal
 *   copyright law.  Distribution and use rights are outlined in the file
 *   "LICENSE.txt" which should have been included with this file.  If this
 *   file is missing or damaged please contact Easy Software Products
 *   at:
 *
 *       Attn: CUPS Licensing Information
 *       Easy Software Products
 *       44141 Airport View Drive, Suite 204
 *       Hollywood, Maryland 20636 USA
 *
 *       Voice: (301) 373-9600
 *       EMail: cups-info@cups.org
 *         WWW: http://www.cups.org
 *
 * Contents:
 *
 *   main()  - Add, change, or delete passwords from the MD5 password file.
 *   usage() - Show program usage.
 */

/*
 * Include necessary headers...
 */

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include <grp.h>
#include <sys/types.h>
#include <sys/stat.h>

#include <cups/string.h>
#include <cups/cups.h>
#include <cups/i18n.h>
#include <cups/md5.h>

#ifndef WIN32
#  include <unistd.h>
#  include <signal.h>
#endif /* !WIN32 */


/*
 * Operations...
 */

#define ADD	0
#define CHANGE	1
#define DELETE	2


/*
 * Local functions...
 */

static void	usage(FILE *fp);


/*
 * 'main()' - Add, change, or delete passwords from the MD5 password file.
 */

int					/* O - Exit status */
main(int  argc,				/* I - Number of command-line arguments */
     char *argv[])			/* I - Command-line arguments */
{
  int		i;			/* Looping var */
  char		*opt;			/* Option pointer */
  const char	*username;		/* Pointer to username */
  const char	*groupname;		/* Pointer to group name */
  int		op;			/* Operation (add, change, delete) */
  const char	*passwd;		/* Password string */
  FILE		*infile,		/* Input file */
		*outfile;		/* Output file */
  char		line[256],		/* Line from file */
		userline[17],		/* User from line */
		groupline[17],		/* Group from line */
		md5line[33],		/* MD5-sum from line */
		md5new[33];		/* New MD5 sum */
  const char	*root;			/* CUPS server root directory */
  char		passwdmd5[1024],	/* passwd.md5 file */
		passwdold[1024],	/* passwd.old file */
		passwdnew[1024];	/* passwd.tmp file */
  char		*newpass,		/* new password */
  		*oldpass;		/* old password */
  int		flag;			/* Password check flags... */
  int		fd;			/* Password file descriptor */
  int		error;			/* Write error */
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
  struct sigaction action;		/* Signal action */
#endif /* HAVE_SIGACTION && !HAVE_SIGSET*/


 /*
  * Check to see if stdin, stdout, and stderr are still open...
  */

  if (fcntl(0, F_GETFD, &i) ||
      fcntl(1, F_GETFD, &i) ||
      fcntl(2, F_GETFD, &i))
  {
   /*
    * No, return exit status 2 and don't try to send any output since
    * someone is trying to bypass the security on the server.
    */

    return (2);
  }

 /*
  * Find the server directory...
  *
  * We use the CUPS_SERVERROOT environment variable when we are running
  * as root or when lppasswd is not setuid...
  */

  if ((root = getenv("CUPS_SERVERROOT")) == NULL ||
      (getuid() != geteuid() && getuid()))
    root = CUPS_SERVERROOT;

  snprintf(passwdmd5, sizeof(passwdmd5), "%s/passwd.md5", root);
  snprintf(passwdold, sizeof(passwdold), "%s/passwd.old", root);
  snprintf(passwdnew, sizeof(passwdnew), "%s/passwd.new", root);

 /*
  * Find the default system group...
  */

  if (getgrnam(CUPS_DEFAULT_GROUP))
    groupname = CUPS_DEFAULT_GROUP;
  else
    groupname = "unknown";

  endgrent();

  username = NULL;
  op       = CHANGE;

 /*
  * Parse command-line options...
  */

  for (i = 1; i < argc; i ++)
    if (argv[i][0] == '-')
      for (opt = argv[i] + 1; *opt; opt ++)
        switch (*opt)
	{
	  case 'a' : /* Add */
	      op = ADD;
	      break;
	  case 'x' : /* Delete */
	      op = DELETE;
	      break;
	  case 'g' : /* Group */
	      i ++;
	      if (i >= argc)
	        usage(stderr);

              groupname = argv[i];
	      break;
	  case 'h' : /* Help */
	      usage(stdout);
	      break;
	  default : /* Bad option */
	      usage(stderr);
	      break;
	}
    else if (!username)
      username = argv[i];
    else
      usage(stderr);

 /*
  * See if we are trying to add or delete a password when we aren't logged in
  * as root...
  */

  if (getuid() && getuid() != geteuid() && (op != CHANGE || username))
  {
    _cupsLangPuts(stderr,
                  _("lppasswd: Only root can add or delete passwords!\n"));
    return (1);
  }

 /*
  * Fill in missing info...
  */

  if (!username)
    username = cupsUser();

  oldpass = newpass = NULL;

 /*
  * Obtain old and new password _before_ locking the database
  * to keep users from locking the file indefinitely.
  */

  if (op == CHANGE && getuid())
  {
    if ((passwd = cupsGetPassword(_("Enter old password:"))) == NULL)
      return (1);

    if ((oldpass = strdup(passwd)) == NULL)
    {
      _cupsLangPrintf(stderr,
                      _("lppasswd: Unable to copy password string: %s\n"),
		      strerror(errno));
      return (1);
    }
  }

 /*
  * Now get the new password, if necessary...
  */

  if (op != DELETE)
  {
    if ((passwd = cupsGetPassword(_("Enter password:"))) == NULL)
      return (1);

    if ((newpass = strdup(passwd)) == NULL)
    {
      _cupsLangPrintf(stderr,
                      _("lppasswd: Unable to copy password string: %s\n"),
		      strerror(errno));
      return (1);
    }

    if ((passwd = cupsGetPassword(_("Enter password again:"))) == NULL)
      return (1);

    if (strcmp(passwd, newpass) != 0)
    {
      _cupsLangPuts(stderr,
                    _("lppasswd: Sorry, passwords don't match!\n"));
      return (1);
    }

   /*
    * Check that the password contains at least one letter and number.
    */

    flag = 0;

    for (passwd = newpass; *passwd; passwd ++)
      if (isdigit(*passwd & 255))
	flag |= 1;
      else if (isalpha(*passwd & 255))
	flag |= 2;

   /*
    * Only allow passwords that are at least 6 chars, have a letter and
    * a number, and don't contain the username.
    */

    if (strlen(newpass) < 6 || strstr(newpass, username) != NULL || flag != 3)
    {
      _cupsLangPuts(stderr,
                    _("lppasswd: Sorry, password rejected.\n"
		      "Your password must be at least 6 characters long, "
		      "cannot contain\n"
		      "your username, and must contain at least one letter "
		      "and number.\n"));
      return (1);
    }
  }

 /*
  * Ignore SIGHUP, SIGINT, SIGTERM, and SIGXFSZ (if defined) for the
  * remainder of the time so that we won't end up with bogus password
  * files...
  */

#ifndef WIN32
#  if defined(HAVE_SIGSET)
  sigset(SIGHUP, SIG_IGN);
  sigset(SIGINT, SIG_IGN);
  sigset(SIGTERM, SIG_IGN);
#    ifdef SIGXFSZ
  sigset(SIGXFSZ, SIG_IGN);
#    endif /* SIGXFSZ */
#  elif defined(HAVE_SIGACTION)
  memset(&action, 0, sizeof(action));
  action.sa_handler = SIG_IGN;

  sigaction(SIGHUP, &action, NULL);
  sigaction(SIGINT, &action, NULL);
  sigaction(SIGTERM, &action, NULL);
#    ifdef SIGXFSZ
  sigaction(SIGXFSZ, &action, NULL);
#    endif /* SIGXFSZ */
#  else
  signal(SIGHUP, SIG_IGN);
  signal(SIGINT, SIG_IGN);
  signal(SIGTERM, SIG_IGN);
#    ifdef SIGXFSZ
  signal(SIGXFSZ, SIG_IGN);
#    endif /* SIGXFSZ */
#  endif
#endif /* !WIN32 */

 /*
  * Open the output file.
  */

  if ((fd = open(passwdnew, O_WRONLY | O_CREAT | O_EXCL, 0400)) < 0)
  {
    if (errno == EEXIST)
      _cupsLangPuts(stderr, _("lppasswd: Password file busy!\n"));
    else
      _cupsLangPrintf(stderr,
                      _("lppasswd: Unable to open password file: %s\n"),
		      strerror(errno));

    return (1);
  }

  if ((outfile = fdopen(fd, "w")) == NULL)
  {
    _cupsLangPrintf(stderr,
                    _("lppasswd: Unable to open password file: %s\n"),
		    strerror(errno));

    unlink(passwdnew);

    return (1);
  }

  setbuf(outfile, NULL);

 /*
  * Open the existing password file and create a new one...
  */

  infile = fopen(passwdmd5, "r");
  if (infile == NULL && errno != ENOENT && op != ADD)
  {
    _cupsLangPrintf(stderr,
                    _("lppasswd: Unable to open password file: %s\n"),
		    strerror(errno));

    fclose(outfile);

    unlink(passwdnew);

    return (1);
  }

 /*
  * Read lines from the password file; the format is:
  *
  *   username:group:MD5-sum
  */

  error        = 0;
  userline[0]  = '\0';
  groupline[0] = '\0';
  md5line[0]   = '\0';

  if (infile)
  {
    while (fgets(line, sizeof(line), infile) != NULL)
    {
      if (sscanf(line, "%16[^:]:%16[^:]:%32s", userline, groupline, md5line) != 3)
        continue;

      if (strcmp(username, userline) == 0 &&
          strcmp(groupname, groupline) == 0)
	break;

      if (fputs(line, outfile) == EOF)
      {
	_cupsLangPrintf(stderr,
                	_("lppasswd: Unable to write to password file: %s\n"),
			strerror(errno));
        error = 1;
	break;
      }
    }

    if (!error)
    {
      while (fgets(line, sizeof(line), infile) != NULL)
	if (fputs(line, outfile) == EOF)
	{
	  _cupsLangPrintf(stderr,
                	  _("lppasswd: Unable to write to password file: %s\n"),
			  strerror(errno));
	  error = 1;
	  break;
	}
    }
  }

  if (op == CHANGE &&
      (strcmp(username, userline) || strcmp(groupname, groupline)))
  {
    _cupsLangPrintf(stderr,
                    _("lppasswd: user \"%s\" and group \"%s\" do not exist.\n"),
        	    username, groupname);
    error = 1;
  }
  else if (op != DELETE)
  {
    if (oldpass &&
        strcmp(httpMD5(username, "CUPS", oldpass, md5new), md5line) != 0)
    {
      _cupsLangPuts(stderr,
                    _("lppasswd: Sorry, password doesn't match!\n"));
      error = 1;
    }
    else
    {
      snprintf(line, sizeof(line), "%s:%s:%s\n", username, groupname,
               httpMD5(username, "CUPS", newpass, md5new));
      if (fputs(line, outfile) == EOF)
      {
	_cupsLangPrintf(stderr,
                	_("lppasswd: Unable to write to password file: %s\n"),
			strerror(errno));
        error = 1;
      }
    }
  }

 /*
  * Close the files...
  */

  if (infile)
    fclose(infile);

  if (fclose(outfile) == EOF)
    error = 1;

 /*
  * Error out gracefully as needed...
  */

  if (error)
  {
    _cupsLangPuts(stderr, _("lppasswd: Password file not updated!\n"));
    
    unlink(passwdnew);

    return (1);
  }

 /*
  * Save old passwd file
  */

  unlink(passwdold);
  if (link(passwdmd5, passwdold) && errno != ENOENT)
  {
    _cupsLangPrintf(stderr,
                    _("lppasswd: failed to backup old password file: %s\n"),
		    strerror(errno));
    unlink(passwdnew);
    return (1);
  }

 /*
  * Install new password file
  */

  if (rename(passwdnew, passwdmd5) < 0)
  {
    _cupsLangPrintf(stderr,
                    _("lppasswd: failed to rename password file: %s\n"),
		    strerror(errno));
    unlink(passwdnew);
    return (1);
  }

  return (0);
}


/*
 * 'usage()' - Show program usage.
 */

static void
usage(FILE *fp)		/* I - File to send usage to */
{
  if (getuid())
    _cupsLangPuts(fp, _("Usage: lppasswd [-g groupname]\n"));
  else
    _cupsLangPuts(fp, 
                  _("Usage: lppasswd [-g groupname] [username]\n"
		    "       lppasswd [-g groupname] -a [username]\n"
		    "       lppasswd [-g groupname] -x [username]\n"));

  exit(1);
}


/*
 * End of "$Id: lppasswd.c 177 2006-06-21 00:20:03Z jlovell $".
 */
Commit	Line	Data
ef416fc2	1	/*
c07d5b2d	2	* "$Id: lppasswd.c 177 2006-06-21 00:20:03Z jlovell $"
ef416fc2	3	*
	4	* MD5 password program for the Common UNIX Printing System (CUPS).
	5	*
	6	* Copyright 1997-2006 by Easy Software Products.
	7	*
	8	* These coded instructions, statements, and computer programs are the
	9	* property of Easy Software Products and are protected by Federal
	10	* copyright law. Distribution and use rights are outlined in the file
	11	* "LICENSE.txt" which should have been included with this file. If this
	12	* file is missing or damaged please contact Easy Software Products
	13	* at:
	14	*
	15	* Attn: CUPS Licensing Information
	16	* Easy Software Products
	17	* 44141 Airport View Drive, Suite 204
	18	* Hollywood, Maryland 20636 USA
	19	*
	20	* Voice: (301) 373-9600
	21	* EMail: cups-info@cups.org
	22	* WWW: http://www.cups.org
	23	*
	24	* Contents:
	25	*
	26	* main() - Add, change, or delete passwords from the MD5 password file.
	27	* usage() - Show program usage.
	28	*/
	29
	30	/*
	31	* Include necessary headers...
	32	*/
	33
	34	#include <stdio.h>
	35	#include <stdlib.h>
	36	#include <errno.h>
	37	#include <ctype.h>
	38	#include <fcntl.h>
	39	#include <grp.h>
	40	#include <sys/types.h>
	41	#include <sys/stat.h>
	42
	43	#include <cups/string.h>
	44	#include <cups/cups.h>
	45	#include <cups/i18n.h>
	46	#include <cups/md5.h>
	47
	48	#ifndef WIN32
	49	# include <unistd.h>
	50	# include <signal.h>
	51	#endif /* !WIN32 */
	52
	53
	54	/*
	55	* Operations...
	56	*/
	57
	58	#define ADD 0
	59	#define CHANGE 1
	60	#define DELETE 2
	61
	62
	63	/*
	64	* Local functions...
	65	*/
	66
67	static void usage(FILE *fp);
68
69
70	/*
71	* 'main()' - Add, change, or delete passwords from the MD5 password file.
72	*/
73
74	int /* O - Exit status */
75	main(int argc, /* I - Number of command-line arguments */
76	char argv[]) / I - Command-line arguments */
77	{
78	int i; /* Looping var */
79	char opt; / Option pointer */
80	const char username; / Pointer to username */
81	const char groupname; / Pointer to group name */
82	int op; /* Operation (add, change, delete) */
83	const char passwd; / Password string */
84	FILE infile, / Input file */
85	outfile; / Output file */
86	char line[256], /* Line from file */
87	userline[17], /* User from line */
88	groupline[17], /* Group from line */
89	md5line[33], /* MD5-sum from line */
90	md5new[33]; /* New MD5 sum */
91	const char root; / CUPS server root directory */
92	char passwdmd5[1024], /* passwd.md5 file */
93	passwdold[1024], /* passwd.old file */
94	passwdnew[1024]; /* passwd.tmp file */
95	char newpass, / new password */
96	oldpass; / old password */
97	int flag; /* Password check flags... */
98	int fd; /* Password file descriptor */
99	int error; /* Write error */
100	#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
101	struct sigaction action; /* Signal action */
102	#endif /* HAVE_SIGACTION && !HAVE_SIGSET*/
103
104
105	/*
106	* Check to see if stdin, stdout, and stderr are still open...
107	*/
108
109	if (fcntl(0, F_GETFD, &i) \|\|
110	fcntl(1, F_GETFD, &i) \|\|
111	fcntl(2, F_GETFD, &i))
112	{
113	/*
114	* No, return exit status 2 and don't try to send any output since
115	* someone is trying to bypass the security on the server.
116	*/
117
118	return (2);
119	}
120
121	/*
122	* Find the server directory...
123	*
124	* We use the CUPS_SERVERROOT environment variable when we are running
125	* as root or when lppasswd is not setuid...
126	*/
127
128	if ((root = getenv("CUPS_SERVERROOT")) == NULL \|\|
129	(getuid() != geteuid() && getuid()))
130	root = CUPS_SERVERROOT;
131
132	snprintf(passwdmd5, sizeof(passwdmd5), "%s/passwd.md5", root);
133	snprintf(passwdold, sizeof(passwdold), "%s/passwd.old", root);
134	snprintf(passwdnew, sizeof(passwdnew), "%s/passwd.new", root);
135
136	/*
137	* Find the default system group...
138	*/
139
140	if (getgrnam(CUPS_DEFAULT_GROUP))
141	groupname = CUPS_DEFAULT_GROUP;
142	else
143	groupname = "unknown";
144
145	endgrent();
146
147	username = NULL;
148	op = CHANGE;
149
150	/*
151	* Parse command-line options...
152	*/
153
154	for (i = 1; i < argc; i ++)
155	if (argv[i][0] == '-')
156	for (opt = argv[i] + 1; *opt; opt ++)
157	switch (*opt)
158	{
159	case 'a' : /* Add */
160	op = ADD;
161	break;
162	case 'x' : /* Delete */
163	op = DELETE;
164	break;
165	case 'g' : /* Group */
166	i ++;
167	if (i >= argc)
168	usage(stderr);
169
170	groupname = argv[i];
171	break;
172	case 'h' : /* Help */
173	usage(stdout);
174	break;
175	default : /* Bad option */
176	usage(stderr);
177	break;
178	}
179	else if (!username)
180	username = argv[i];
181	else
182	usage(stderr);
183
184	/*
185	* See if we are trying to add or delete a password when we aren't logged in
186	* as root...
187	*/
188
189	if (getuid() && getuid() != geteuid() && (op != CHANGE \|\| username))
190	{
fa73b229	191	_cupsLangPuts(stderr,
ef416fc2	192	_("lppasswd: Only root can add or delete passwords!\n"));
	193	return (1);
	194	}
	195
	196	/*
	197	* Fill in missing info...
	198	*/
	199
	200	if (!username)
	201	username = cupsUser();
	202
	203	oldpass = newpass = NULL;
	204
	205	/*
	206	* Obtain old and new password _before_ locking the database
	207	* to keep users from locking the file indefinitely.
	208	*/
	209
	210	if (op == CHANGE && getuid())
	211	{
	212	if ((passwd = cupsGetPassword(_("Enter old password:"))) == NULL)
	213	return (1);
	214
	215	if ((oldpass = strdup(passwd)) == NULL)
	216	{
fa73b229	217	_cupsLangPrintf(stderr,
ef416fc2	218	_("lppasswd: Unable to copy password string: %s\n"),
	219	strerror(errno));
	220	return (1);
	221	}
	222	}
	223
	224	/*
	225	* Now get the new password, if necessary...
	226	*/
	227
	228	if (op != DELETE)
	229	{
	230	if ((passwd = cupsGetPassword(_("Enter password:"))) == NULL)
	231	return (1);
	232
	233	if ((newpass = strdup(passwd)) == NULL)
	234	{
fa73b229	235	_cupsLangPrintf(stderr,
ef416fc2	236	_("lppasswd: Unable to copy password string: %s\n"),
	237	strerror(errno));
	238	return (1);
	239	}
	240
	241	if ((passwd = cupsGetPassword(_("Enter password again:"))) == NULL)
	242	return (1);
	243
	244	if (strcmp(passwd, newpass) != 0)
	245	{
fa73b229	246	_cupsLangPuts(stderr,
ef416fc2	247	_("lppasswd: Sorry, passwords don't match!\n"));
	248	return (1);
	249	}
	250
	251	/*
	252	* Check that the password contains at least one letter and number.
	253	*/
	254
	255	flag = 0;
	256
	257	for (passwd = newpass; *passwd; passwd ++)
	258	if (isdigit(*passwd & 255))
	259	flag \|= 1;
	260	else if (isalpha(*passwd & 255))
	261	flag \|= 2;
	262
	263	/*
	264	* Only allow passwords that are at least 6 chars, have a letter and
	265	* a number, and don't contain the username.
	266	*/
	267
	268	if (strlen(newpass) < 6 \|\| strstr(newpass, username) != NULL \|\| flag != 3)
	269	{
fa73b229	270	_cupsLangPuts(stderr,
ef416fc2	271	_("lppasswd: Sorry, password rejected.\n"
	272	"Your password must be at least 6 characters long, "
	273	"cannot contain\n"
	274	"your username, and must contain at least one letter "
	275	"and number.\n"));
	276	return (1);
	277	}
	278	}
	279
	280	/*
	281	* Ignore SIGHUP, SIGINT, SIGTERM, and SIGXFSZ (if defined) for the
	282	* remainder of the time so that we won't end up with bogus password
	283	* files...
	284	*/
	285
	286	#ifndef WIN32
	287	# if defined(HAVE_SIGSET)
	288	sigset(SIGHUP, SIG_IGN);
	289	sigset(SIGINT, SIG_IGN);
	290	sigset(SIGTERM, SIG_IGN);
	291	# ifdef SIGXFSZ
	292	sigset(SIGXFSZ, SIG_IGN);
	293	# endif /* SIGXFSZ */
	294	# elif defined(HAVE_SIGACTION)
	295	memset(&action, 0, sizeof(action));
	296	action.sa_handler = SIG_IGN;
	297
	298	sigaction(SIGHUP, &action, NULL);
	299	sigaction(SIGINT, &action, NULL);
	300	sigaction(SIGTERM, &action, NULL);
	301	# ifdef SIGXFSZ
	302	sigaction(SIGXFSZ, &action, NULL);
	303	# endif /* SIGXFSZ */
	304	# else
	305	signal(SIGHUP, SIG_IGN);
	306	signal(SIGINT, SIG_IGN);
	307	signal(SIGTERM, SIG_IGN);
	308	# ifdef SIGXFSZ
	309	signal(SIGXFSZ, SIG_IGN);
	310	# endif /* SIGXFSZ */
	311	# endif
	312	#endif /* !WIN32 */
	313
	314	/*
	315	* Open the output file.
	316	*/
	317
	318	if ((fd = open(passwdnew, O_WRONLY \| O_CREAT \| O_EXCL, 0400)) < 0)
	319	{
	320	if (errno == EEXIST)
fa73b229	321	_cupsLangPuts(stderr, _("lppasswd: Password file busy!\n"));
ef416fc2	322	else
fa73b229	323	_cupsLangPrintf(stderr,
ef416fc2	324	_("lppasswd: Unable to open password file: %s\n"),
	325	strerror(errno));
	326
	327	return (1);
	328	}
	329
	330	if ((outfile = fdopen(fd, "w")) == NULL)
	331	{
fa73b229	332	_cupsLangPrintf(stderr,
ef416fc2	333	_("lppasswd: Unable to open password file: %s\n"),
	334	strerror(errno));
	335
	336	unlink(passwdnew);
	337
	338	return (1);
	339	}
	340
	341	setbuf(outfile, NULL);
	342
	343	/*
	344	* Open the existing password file and create a new one...
	345	*/
	346
	347	infile = fopen(passwdmd5, "r");
	348	if (infile == NULL && errno != ENOENT && op != ADD)
	349	{
fa73b229	350	_cupsLangPrintf(stderr,
ef416fc2	351	_("lppasswd: Unable to open password file: %s\n"),
	352	strerror(errno));
	353
	354	fclose(outfile);
	355
	356	unlink(passwdnew);
	357
	358	return (1);
	359	}
	360
	361	/*
	362	* Read lines from the password file; the format is:
	363	*
	364	* username:group:MD5-sum
	365	*/
	366
	367	error = 0;
	368	userline[0] = '\0';
	369	groupline[0] = '\0';
	370	md5line[0] = '\0';
	371
	372	if (infile)
	373	{
	374	while (fgets(line, sizeof(line), infile) != NULL)
	375	{
	376	if (sscanf(line, "%16[^:]:%16[^:]:%32s", userline, groupline, md5line) != 3)
	377	continue;
	378
	379	if (strcmp(username, userline) == 0 &&
	380	strcmp(groupname, groupline) == 0)
	381	break;
	382
	383	if (fputs(line, outfile) == EOF)
	384	{
fa73b229	385	_cupsLangPrintf(stderr,
ef416fc2	386	_("lppasswd: Unable to write to password file: %s\n"),
	387	strerror(errno));
	388	error = 1;
	389	break;
	390	}
	391	}
	392
	393	if (!error)
	394	{
	395	while (fgets(line, sizeof(line), infile) != NULL)
	396	if (fputs(line, outfile) == EOF)
	397	{
fa73b229	398	_cupsLangPrintf(stderr,
ef416fc2	399	_("lppasswd: Unable to write to password file: %s\n"),
	400	strerror(errno));
	401	error = 1;
	402	break;
	403	}
	404	}
	405	}
	406
	407	if (op == CHANGE &&
	408	(strcmp(username, userline) \|\| strcmp(groupname, groupline)))
	409	{
fa73b229	410	_cupsLangPrintf(stderr,
ef416fc2	411	_("lppasswd: user \"%s\" and group \"%s\" do not exist.\n"),
	412	username, groupname);
	413	error = 1;
	414	}
	415	else if (op != DELETE)
	416	{
	417	if (oldpass &&
	418	strcmp(httpMD5(username, "CUPS", oldpass, md5new), md5line) != 0)
	419	{
fa73b229	420	_cupsLangPuts(stderr,
ef416fc2	421	_("lppasswd: Sorry, password doesn't match!\n"));
	422	error = 1;
	423	}
	424	else
	425	{
	426	snprintf(line, sizeof(line), "%s:%s:%s\n", username, groupname,
	427	httpMD5(username, "CUPS", newpass, md5new));
	428	if (fputs(line, outfile) == EOF)
	429	{
fa73b229	430	_cupsLangPrintf(stderr,
ef416fc2	431	_("lppasswd: Unable to write to password file: %s\n"),
	432	strerror(errno));
	433	error = 1;
	434	}
	435	}
	436	}
	437
	438	/*
	439	* Close the files...
	440	*/
	441
	442	if (infile)
	443	fclose(infile);
	444
	445	if (fclose(outfile) == EOF)
	446	error = 1;
	447
	448	/*
	449	* Error out gracefully as needed...
	450	*/
	451
	452	if (error)
	453	{
fa73b229	454	_cupsLangPuts(stderr, _("lppasswd: Password file not updated!\n"));
ef416fc2	455
	456	unlink(passwdnew);
	457
	458	return (1);
	459	}
	460
	461	/*
	462	* Save old passwd file
	463	*/
	464
	465	unlink(passwdold);
	466	if (link(passwdmd5, passwdold) && errno != ENOENT)
	467	{
fa73b229	468	_cupsLangPrintf(stderr,
ef416fc2	469	_("lppasswd: failed to backup old password file: %s\n"),
	470	strerror(errno));
	471	unlink(passwdnew);
	472	return (1);
	473	}
	474
	475	/*
	476	* Install new password file
	477	*/
	478
	479	if (rename(passwdnew, passwdmd5) < 0)
	480	{
fa73b229	481	_cupsLangPrintf(stderr,
ef416fc2	482	_("lppasswd: failed to rename password file: %s\n"),
	483	strerror(errno));
	484	unlink(passwdnew);
	485	return (1);
	486	}
	487
	488	return (0);
	489	}
	490
	491
	492	/*
	493	* 'usage()' - Show program usage.
	494	*/
	495
	496	static void
	497	usage(FILE fp) / I - File to send usage to */
	498	{
	499	if (getuid())
fa73b229	500	_cupsLangPuts(fp, _("Usage: lppasswd [-g groupname]\n"));
ef416fc2	501	else
fa73b229	502	_cupsLangPuts(fp,
ef416fc2	503	_("Usage: lppasswd [-g groupname] [username]\n"
	504	" lppasswd [-g groupname] -a [username]\n"
	505	" lppasswd [-g groupname] -x [username]\n"));
ef416fc2	506
	507	exit(1);
	508	}
	509
	510
	511	/*
c07d5b2d	512	* End of "$Id: lppasswd.c 177 2006-06-21 00:20:03Z jlovell $".
ef416fc2	513	*/