1/* printenv.c - Print environment variables. 2 * 3 * Copyright 2012 Georgi Chorbadzhiyski <georgi@unixsol.org> 4 5USE_PRINTENV(NEWTOY(printenv, "(null)0", TOYFLAG_BIN)) 6 7config PRINTENV 8 bool "printenv" 9 default y 10 help 11 usage: printenv [-0] [env_var...] 12 13 Print environment variables. 14 15 -0 Use \0 as delimiter instead of \n 16*/ 17 18#include "toys.h" 19 20void printenv_main(void) 21{ 22 char **env, **var = toys.optargs; 23 char delim = '\n'; 24 25 if (toys.optflags) delim = 0; 26 27 do { 28 int catch = 0, len = *var ? strlen(*var) : 0; 29 30 for (env = environ; *env; env++) { 31 char *out = *env; 32 if (*var) { 33 if (!strncmp(out, *var, len) && out[len] == '=') out += len +1; 34 else continue; 35 } 36 xprintf("%s%c", out, delim); 37 catch++; 38 } 39 if (*var && !catch) toys.exitval = 1; 40 } while (*var && *(++var)); 41} 42