Tibor Nagy
d1a424c002
This will allow us to redefine the exit function.
For example:
```
#define exit(code) { \
fprintf(stderr, "%s:%d: exit(%s) in function ‘%s’\n",
__FILE__, __LINE__, #code, __func__); \
_exit(code); \
}
```
44 lines
988 B
C
44 lines
988 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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int main(void) {
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//puts(getenv("SHELL"));
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//puts(getenv("CC"));
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char* owned = malloc(26); // "TEST=Updates accordingly." + NUL
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strcpy(owned, "TEST=It's working!!");
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putenv(owned);
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puts(getenv("TEST"));
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strcpy(owned, "TEST=Updates accordingly.");
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puts(getenv("TEST"));
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// Allocation is reused
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setenv("TEST", "in place", 1);
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puts(getenv("TEST"));
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puts(owned);
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// Allocation is not reused
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setenv("TEST", "Value overwritten and not in place because it's really long", 1);
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puts(getenv("TEST"));
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puts(owned);
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// Value is not overwritten
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setenv("TEST", "Value not overwritten", 0);
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puts(getenv("TEST"));
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unsetenv("TEST");
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char* env = getenv("TEST");
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if (env) {
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puts("This should be null, but isn't");
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puts(env);
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exit(EXIT_FAILURE);
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} else {
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puts("Value deleted successfully!");
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}
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free(owned);
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}
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