1/* vi: set sw=4 ts=4: */ 2/* 3 * chpasswd.c 4 * 5 * Written for SLIND (from passwd.c) by Alexander Shishkin <virtuoso@slind.org> 6 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. 7 */ 8 9#include "libbb.h" 10 11#if ENABLE_GETOPT_LONG 12#include <getopt.h> 13 14static const char chpasswd_longopts[] ALIGN1 = 15 "encrypted\0" No_argument "e" 16 "md5\0" No_argument "m" 17 ; 18#endif 19 20#define OPT_ENC 1 21#define OPT_MD5 2 22 23int chpasswd_main(int argc, char **argv); 24int chpasswd_main(int argc, char **argv) 25{ 26 char *name, *pass; 27 char salt[sizeof("$N$XXXXXXXX")]; 28 int opt, rc; 29 int rnd = rnd; /* we *want* it to be non-initialized! */ 30 31 if (getuid()) 32 bb_error_msg_and_die(bb_msg_perm_denied_are_you_root); 33 34 opt_complementary = "m--e:e--m"; 35 USE_GETOPT_LONG(applet_long_options = chpasswd_longopts;) 36 opt = getopt32(argv, "em"); 37 38 while ((name = xmalloc_getline(stdin)) != NULL) { 39 pass = strchr(name, ':'); 40 if (!pass) 41 bb_error_msg_and_die("missing new password"); 42 *pass++ = '\0'; 43 44 xuname2uid(name); /* dies if there is no such user */ 45 46 if (!(opt & OPT_ENC)) { 47 rnd = crypt_make_salt(salt, 1, rnd); 48 if (opt & OPT_MD5) { 49 strcpy(salt, "$1$"); 50 rnd = crypt_make_salt(salt + 3, 4, rnd); 51 } 52 pass = pw_encrypt(pass, salt); 53 } 54 55 /* This is rather complex: if user is not found in /etc/shadow, 56 * we try to find & change his passwd in /etc/passwd */ 57#if ENABLE_FEATURE_SHADOWPASSWDS 58 rc = update_passwd(bb_path_shadow_file, name, pass); 59 if (rc == 0) /* no lines updated, no errors detected */ 60#endif 61 rc = update_passwd(bb_path_passwd_file, name, pass); 62 /* LOGMODE_BOTH logs to syslog also */ 63 logmode = LOGMODE_BOTH; 64 if (rc < 0) 65 bb_error_msg_and_die("an error occurred updating password for %s", name); 66 if (rc) 67 bb_info_msg("Password for '%s' changed", name); 68 logmode = LOGMODE_STDIO; 69 free(name); 70 } 71 72 return 0; 73} 74