46 lines
732 B
C
46 lines
732 B
C
/* See LICENSE file for copyright and license details. */
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "util.h"
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extern char **environ;
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static void
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usage(void)
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{
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eprintf("usage: env [-i] [-u variable] ... [variable=value] ... [cmd [arg ...]]\n");
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}
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int
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main(int argc, char *argv[])
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{
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ARGBEGIN {
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case 'i':
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if(environ)
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*environ = NULL;
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break;
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case 'u':
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unsetenv(EARGF(usage()));
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break;
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default:
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usage();
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} ARGEND;
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for (; *argv && strchr(*argv, '='); argv++)
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putenv(*argv);
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if (*argv) {
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execvp(*argv, argv);
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enprintf(127 - (errno != EEXIST), "env: '%s':", *argv);
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}
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while (environ && *environ)
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printf("%s\n", *environ++);
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return 0;
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}
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