104 lines
2.0 KiB
C
Executable File
104 lines
2.0 KiB
C
Executable File
/*
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* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T
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* All Rights Reserved
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*/
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/*
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* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T
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* The copyright notice above does not evidence any
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* actual or intended publication of such source code.
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*/
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#ident "@(#)env.c 1.10 94/10/05 SMI" /* SVr4.0 1.5 */
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/*
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* env [ - ] [ name=value ]... [command arg...]
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* set environment, then execute command (or print environment)
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* - says start fresh, otherwise merge with inherited environment
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <limits.h>
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#include <ctype.h>
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#include <locale.h>
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#include <string.h>
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#include <unistd.h>
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static void Usage();
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static char *nullp = NULL;
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extern char **environ;
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int
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main(int argc, char **argv)
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{
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char **p;
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int opt;
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int i;
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(void) setlocale(LC_ALL, "");
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#if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */
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#define TEXT_DOMAIN "SYS_TEST" /* Use this only if it weren't */
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#endif
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(void) textdomain(TEXT_DOMAIN);
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/* check for non-standard "-" option */
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if ((argc > 1) && (strcmp(argv[1], "-")) == 0) {
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environ = &nullp;
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for (i = 1; i < argc; i++)
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argv[i] = argv[i+1];
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argc--;
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}
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/* get options */
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while ((opt = getopt(argc, argv, "i")) != EOF) {
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switch (opt) {
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case 'i':
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environ = &nullp;
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break;
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default:
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Usage();
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}
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}
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/* get environment strings */
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while (argv[optind] != NULL && strchr(argv[optind], '=') != NULL) {
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if (putenv(argv[optind])) {
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(void) perror(argv[optind]);
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exit(1);
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}
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optind++;
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}
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/* if no utility, output environment strings */
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if (argv[optind] == NULL) {
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p = environ;
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while (*p != NULL)
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(void) puts(*p++);
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} else {
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(void) execvp(argv[optind], &argv[optind]);
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(void) perror(argv[0]);
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exit(((errno == ENOENT) || (errno == ENOTDIR)) ? 127 : 126);
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}
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return (0);
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}
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static void
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Usage()
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{
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(void) fprintf(stderr, gettext(
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"Usage: env [-i] [name=value ...] [utility [argument ...]]\n"
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" env [-] [name=value ...] [utility [argument ...]]\n"));
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exit(1);
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}
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