*
* Original copyright notice is retained at the end of this file.
*
- * Modified for BusyBox by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ * Modified for BusyBox by Erik Andersen <andersen@codepoet.org>
*/
+/* BB_AUDIT SUSv3 compliant */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/env.html */
+
+/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
+ *
+ * Fixed bug involving exit return codes if execvp fails. Also added
+ * output error checking.
+ */
+
+/*
+ * Modified by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
+ * - correct "-" option usage
+ * - multiple "-u unsetenv" support
+ * - GNU long option support
+ * - save errno after exec failed before bb_perror_msg()
+ */
+
+
#include <stdio.h>
#include <string.h>
-#include <getopt.h>
#include <stdlib.h>
+#include <errno.h>
#include <unistd.h>
+#include <getopt.h> /* struct option */
#include "busybox.h"
+
+static const struct option env_long_options[] = {
+ { "ignore-environment", 0, NULL, 'i' },
+ { "unset", 1, NULL, 'u' },
+ { 0, 0, 0, 0 }
+};
+
extern int env_main(int argc, char** argv)
{
char **ep, *p;
- char *cleanenv[1];
- int ignore_environment = 0;
- int ch;
-
- while ((ch = getopt(argc, argv, "+iu:")) != -1) {
- switch(ch) {
- case 'i':
- ignore_environment = 1;
- break;
- case 'u':
- unsetenv(optarg);
- break;
- default:
- show_usage();
- }
- }
- if (optind != argc && !strcmp(argv[optind], "-")) {
- ignore_environment = 1;
- argv++;
+ char *cleanenv[1] = { NULL };
+ unsigned long opt;
+ llist_t *unset_env = NULL;
+ extern char **environ;
+
+ bb_opt_complementally = "u*";
+ bb_applet_long_options = env_long_options;
+
+ opt = bb_getopt_ulflags(argc, argv, "+iu:", &unset_env);
+
+ argv += optind;
+ if (*argv && (argv[0][0] == '-') && !argv[0][1]) {
+ opt |= 1;
+ ++argv;
}
- if (ignore_environment) {
+
+ if(opt & 1)
environ = cleanenv;
- cleanenv[0] = NULL;
+ else if(opt & 2) {
+ while(unset_env) {
+ unsetenv(unset_env->data);
+ unset_env = unset_env->link;
+ }
+ }
+
+ while (*argv && ((p = strchr(*argv, '=')) != NULL)) {
+ if (putenv(*argv) < 0) {
+ bb_perror_msg_and_die("putenv");
+ }
+ ++argv;
}
- for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv)
- putenv(*argv);
+
if (*argv) {
+ int er;
+
execvp(*argv, argv);
- perror_msg_and_die("%s", *argv);
+ er = errno;
+ bb_perror_msg("%s", *argv); /* Avoid multibyte problems. */
+ return (er == ENOENT) ? 127 : 126; /* SUSv3-mandated exit codes. */
+ }
+
+ for (ep = environ; *ep; ep++) {
+ puts(*ep);
}
- for (ep = environ; *ep; ep++)
- printf("%s\n", *ep);
- return 0;
+
+ bb_fflush_stdout_and_exit(0);
}
/*
* Copyright (c) 1988, 1993, 1994
- * The Regents of the University of California. All rights reserved.
+ * The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
- * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
- * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
+ * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
+ * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
*
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software