1 /* $OpenBSD: getenv_num.c,v 1.4 2023/10/17 09:52:09 nicm Exp $ */ 2 3 /**************************************************************************** 4 * Copyright 2018,2020 Thomas E. Dickey * 5 * Copyright 1998-2012,2013 Free Software Foundation, Inc. * 6 * * 7 * Permission is hereby granted, free of charge, to any person obtaining a * 8 * copy of this software and associated documentation files (the * 9 * "Software"), to deal in the Software without restriction, including * 10 * without limitation the rights to use, copy, modify, merge, publish, * 11 * distribute, distribute with modifications, sublicense, and/or sell * 12 * copies of the Software, and to permit persons to whom the Software is * 13 * furnished to do so, subject to the following conditions: * 14 * * 15 * The above copyright notice and this permission notice shall be included * 16 * in all copies or substantial portions of the Software. * 17 * * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 21 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 24 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 25 * * 26 * Except as contained in this notice, the name(s) of the above copyright * 27 * holders shall not be used in advertising or otherwise to promote the * 28 * sale, use or other dealings in this Software without prior written * 29 * authorization. * 30 ****************************************************************************/ 31 32 /**************************************************************************** 33 * Author: Thomas E. Dickey <dickey@clark.net> 1998 * 34 ****************************************************************************/ 35 36 /* 37 * getenv_num.c -- obtain a number from the environment 38 */ 39 40 #include <curses.priv.h> 41 42 MODULE_ID("$Id: getenv_num.c,v 1.4 2023/10/17 09:52:09 nicm Exp $") 43 44 NCURSES_EXPORT(int) 45 _nc_getenv_num(const char *name) 46 { 47 char *dst = 0; 48 char *src = getenv(name); 49 long value; 50 51 if ((src == 0) 52 || (value = strtol(src, &dst, 0)) < 0 53 || (dst == src) 54 || (*dst != '\0') 55 || (int) value < value) 56 value = -1; 57 58 return (int) value; 59 } 60 61 NCURSES_EXPORT(void) 62 _nc_setenv_num(const char *name, int value) 63 { 64 if (name != 0 && value >= 0) { 65 char buffer[128]; 66 #if HAVE_SETENV 67 _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) "%d", value); 68 setenv(name, buffer, 1); 69 #elif HAVE_PUTENV 70 char *s; 71 _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) "%s=%d", name, value); 72 if ((s = strdup(buffer)) != 0) 73 putenv(s); 74 #else 75 #error expected setenv/putenv functions 76 #endif 77 } 78 } 79