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#include <string.h>
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#include <stdlib.h>
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extern char ** environ;
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char * getenv(const char *name) {
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char ** e = environ;
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size_t len = strlen(name);
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while (*e) {
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char * t = *e;
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if (strstr(t, name) == *e) {
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if (t[len] == '=') {
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return &t[len+1];
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}
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}
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e++;
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}
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return NULL;
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}
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