/* Copyright (c) 2001-2010, Dirk Krause All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above opyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the Dirk Krause nor the names of contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @file uid.c The uid program. */ #include #ifndef SIZEOF_SIZE_T /** Fallback define. */ #define SIZEOF_SIZE_T 4 #endif #if SIZEOF_SIZE_T == 8 /** Maximum size_t value. */ #define DK_MAX_SIZE_T 0xFFFFFFFFFFFFFFFFULL #else #if SIZEOF_SIZE_T == 4 /** Maximum size_t value. */ #define DK_MAX_SIZE_T 0xFFFFFFFFUL #else /** Maximum size_t value. */ #define DK_MAX_SIZE_T 0xFFFFU #endif #endif #include #include #include #include #include #include #if DK_HAVE_STDIO_H #include #endif #if DK_HAVE_STDLIB_H #include #endif #if DK_HAVE_PWD_H #include #endif #include "dktools-version.h" /** Application. */ dk_app_t *app = NULL; /** Buffer for UID range. */ static char uid_range[32]; /** Buffer for output. */ static char write_buffer[32]; /** Preference key to retrieve UID range. */ static char key_range[] = { "/uid/range" }; /** Message texts, filled using the string finder. */ static char *msg_str[11]; /** String finder table. */ static dk_string_finder_t msg_find[] = { { "/uid/e/000", &(msg_str[0]), "Range \"" }, { "/uid/e/001", &(msg_str[1]), "\"-\"" }, { "/uid/e/002", &(msg_str[2]), "\" too large!" }, { "/uid/e/003", &(msg_str[3]), "Range \"" }, { "/uid/e/004", &(msg_str[4]), "\"-\"" }, { "/uid/e/005", &(msg_str[5]), "\" not valid!" }, { "/uid/e/006", &(msg_str[6]), "Range needed!" }, { "/uid/e/007", &(msg_str[7]), "No free UID available in range!" }, { "/uid/e/008", &(msg_str[8]), "No getpwent() function available!" }, { "/uid/cc", &(msg_str[9]), "Current configuration:" }, { "/uid/cc-range", &(msg_str[10]), "UID range:" }, { NULL, NULL, NULL } }; /** Long options. */ static char *long_option_keywords[] = { "v$ersion", "h$elp", "c$onfigure", "u$nconfigure", "sh$ow-configuration", NULL }; /** License terms. */ static char *license_terms[] = { "Redistribution and use in source and binary forms, with or without", "modification, are permitted provided that the following conditions are met:", "* Redistributions of source code must retain the above copyright notice, this", " list of conditions and the following disclaimer.", "* Redistributions in binary form must reproduce the above copyright notice,", " this list of conditions and the following disclaimer in the documentation", " and/or other materials provided with the distribution.", "* Neither the name of the Dirk Krause nor the names of other contributors may", " be used to endorse or promote products derived from this software without", " specific prior written permission.", "THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"", "AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE", "IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE", "ARE DISCLAIMED.", "IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY", "DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES", "(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;", "LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND", "ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT", "(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS", "SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.", NULL }; /** Print version number. */ static void print_version DK_P0() { char **ptr; printf("\n"); printf( "uid (part of the dktools collection, version %s)\n", VERSNUMB ); printf("Copyright (C) 2001-2010 Dipl.-Ing. D. Krause\n"); printf("http://dktools.sourceforge.net/\n\n"); ptr = license_terms; while(*ptr) { printf("%s\n", *(ptr++)); } printf("\nLibraries used:\n\n"); ptr = dklic_get(); while(*ptr) { printf("%s\n", *(ptr++)); } printf("\n"); } /** Help text. */ static char *help_text[] = { "", "uid - find free user id", "=======================", "", "Usage:", "", "uid ", "", "min: minimum user id", "max: maximum user id", "", "Example:", "", "uid 3000 4000", "", NULL }; /** Print help text. */ static void print_help DK_P0() { dkapp_help(app, "uid.txt", help_text); } /** Run the program. Check whether to run normally or to print help text or version information. @param argc Number of command line arguments. @param argv Command line arguments array. @return 1 on success, 0 on errors. */ static int run_main DK_P2(int, argc, char **,argv) { int back = 0; char *r, *r1, *r2; unsigned long min, max, diff, x; size_t num, xnum; dk_bitfield_t *bf; struct passwd *pwent; int cc, i, help_wanted, version_wanted, do_configure, un_configure; int do_showconf; char *cptr, **lfdptr; char *logmsg[6]; r = r1 = r2 = NULL; help_wanted = version_wanted = 0; do_configure = do_showconf = un_configure = 0; if(dkapp_get_pref(app, key_range, uid_range, sizeof(uid_range), 0)) { r = uid_range; } /* if(argc > 1) { r = r1 = argv[1]; } if(argc > 2) { r2 = argv[2]; } */ i = 1; lfdptr = argv; lfdptr++; while(i < argc) { cptr = *lfdptr; if(*cptr == '-') { cptr++; switch(*cptr) { case '-': { cptr++; switch(dkstr_array_abbr(long_option_keywords, cptr, '$', 0)) { case 0: version_wanted = 1; break; case 1: help_wanted = 1; break; case 2: do_configure = 1; break; case 3: un_configure = 1; break; case 4: do_showconf = 1; break; } } break; case 'v': { version_wanted = 1; } break; case 'h': { help_wanted = 1; } break; case 'c': { do_configure = 1; } break; case 'u': { un_configure = 1; } break; case 'C': { do_showconf = 1; } break; } } else { if(r1) { if(!r2) { r2 = cptr; } } else { r1 = cptr; } } i++; lfdptr++; } if(help_wanted || version_wanted) { back = 1; if(version_wanted) { print_version(); } if(help_wanted) { print_help(); } } else { if(un_configure) { dkapp_unconfigure(app); } else { if(do_configure || do_showconf) { /* normal run */ if(!r1) { r1 = r; } if(!r2) { if(r1) { r2 = dkstr_chr(r1, '-'); if(r2) { *(r2++) = (char)0; } } } if(r1 && r2) { if((sscanf(r1, "%lu", &min) == 1) && (sscanf(r2, "%lu", &max) == 1)) { if(max < min) { diff = min; min = max; max = diff; } sprintf(write_buffer, "%lu-%lu", min, max); if(do_configure) { if(dkapp_set_pref(app, key_range, write_buffer)) { back = 1; } } fputs(msg_str[9], stdout); fputc('\n', stdout); fputs(msg_str[10], stdout); fputc(' ', stdout); fputs(write_buffer, stdout); fputc('\n', stdout); } else { /* ERROR: Invalid range */ logmsg[0] = msg_str[3]; logmsg[1] = r1; logmsg[2] = msg_str[4]; logmsg[3] = r2; logmsg[4] = msg_str[5]; dkapp_log_msg(app, DK_LOG_LEVEL_ERROR, logmsg, 5); } } else { /* ERROR: Range needed */ logmsg[0] = msg_str[6]; dkapp_log_msg(app, DK_LOG_LEVEL_ERROR, logmsg, 1); } } else { /* normal run */ if(!r1) { r1 = r; } if(!r2) { if(r1) { r2 = dkstr_chr(r1, '-'); if(r2) { *(r2++) = (char)0; } } } if(r1 && r2) { if((sscanf(r1, "%lu", &min) == 1) && (sscanf(r2, "%lu", &max) == 1)) { if(max < min) { diff = min; min = max; max = diff; } diff = max - min + 1; if(diff > (unsigned long)DK_MAX_SIZE_T) { /* ERROR: Range too large */ logmsg[0] = msg_str[0]; logmsg[1] = r1; logmsg[2] = msg_str[1]; logmsg[3] = r2; logmsg[4] = msg_str[2]; dkapp_log_msg(app, DK_LOG_LEVEL_ERROR, logmsg, 5); } else { num = (size_t)diff; bf = dkbf_open(num); if(bf) { #if DK_HAVE_SETPWENT setpwent(); #endif while((pwent = getpwent()) != NULL) { x = (unsigned long)(pwent->pw_uid); if((x >= min) && (x <= max)) { diff = x - min; dkbf_set(bf, (size_t)diff, 1); } } #if DK_HAVE_ENDPWENT endpwent(); #endif cc = 1; xnum = 0; while(cc) { if(xnum >= num) { cc = 0; } else { if(!dkbf_get(bf, xnum)) { x = (unsigned long)xnum; printf("%lu\n", (min + x)); cc = 0; back = 1; } else { xnum++; } } } dkbf_close(bf); bf = NULL; if(!back) { /* ERROR: No free UID in range */ logmsg[0] = msg_str[7]; dkapp_log_msg(app, DK_LOG_LEVEL_ERROR, logmsg, 1); } } else { dkapp_err_memory(app, sizeof(dk_bitfield_t), 1); } } } else { /* ERROR: Invalid range */ logmsg[0] = msg_str[3]; logmsg[1] = r1; logmsg[2] = msg_str[4]; logmsg[3] = r2; logmsg[4] = msg_str[5]; dkapp_log_msg(app, DK_LOG_LEVEL_ERROR, logmsg, 5); } } else { /* ERROR: Range needed */ logmsg[0] = msg_str[6]; dkapp_log_msg(app, DK_LOG_LEVEL_ERROR, logmsg, 1); } } } } return back; } /** The main() function of the uid program. @param argc Number of command line arguments. @param argv Command line arguments array. @return 1 on success, 0 on error. */ #if DK_HAVE_PROTOTYPES int main(int argc, char *argv[]) #else int main(argc,argv) int argc; char *argv[]; #endif { int exval = 0; int xargc; char **xargv; #if !DK_HAVE_GETPWENT char *logmsg[2]; #endif #line 469 "uid.ctr" app = dkapp_open(argc, argv); if(app) { dkapp_find_multi(app, msg_find, "uid"); xargc = dkapp_get_argc(app); xargv = dkapp_get_argv(app); #if DK_HAVE_GETPWENT exval = run_main(xargc, xargv); #else logmsg[0] = msg_str[8]; dkapp_log_msg(app, DK_LOG_LEVEL_ERROR, logmsg, 1); #endif dkapp_close(app); app = NULL; } else { if(!dkapp_silence_check(argc,argv)) { fprintf(stderr, "ERROR: Not enough memory!\n"); fflush(stdout); } } #line 488 "uid.ctr" exval = (exval ? 0 : 1); exit(exval); return exval; }