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/*
* UNG's Not GNU
*
* Copyright (c) 2011-2017, Jakob Kaivo <jkk@ung.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "sh.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
char **exported_environ = NULL;
static int nexports = 0;
void sh_export(const char *env)
{
char *value = getenv(env);
if (value == NULL) {
return;
}
size_t klen = strlen(env);
char *keyval = calloc(klen + strlen(value) + 2, 1);
sprintf(keyval, "%s=%s", env, value);
for (int i = 0; i < nexports; i++) {
if (!strncmp(exported_environ[i], env, klen)
&& exported_environ[i][klen] == '=') {
free(exported_environ[i]);
exported_environ[i] = keyval;
return;
}
}
nexports++;
exported_environ = realloc(exported_environ,
nexports * sizeof(*exported_environ));
exported_environ[nexports-1] = keyval;
}
int export_main(int argc, char *argv[])
{
int print = 0;
int c;
while ((c = getopt(argc, argv, "p")) != EOF) {
switch (c) {
case 'p': /** print exported variables **/
print = 1;
break;
default:
return 1;
}
}
if (print && argv[optind] != NULL) {
fprintf(stderr, "export: can't display and export at the same time\n");
return 1;
}
if (print) {
for (char **e = exported_environ; e && *e; e++) {
char *env = strdup(*e);
size_t len = strlen(env);
if (env[len - 1] == '=') {
env[len - 1] = '\0';
}
printf("export %s\n", env);
free(env);
}
return 0;
}
do {
char *var = argv[optind++];
char *eq = strchr(var, '=');
if (eq) {
putenv(var);
*eq = '\0';
}
sh_export(var);
} while (optind < argc);
return 0;
}
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