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Wiki Markup In a hosted environment, the main function receives a third argument, {{char \*envp\[\]}}, that points to a nullNULL-terminated array of pointers to {{char}}, each of which points to a string that provides information about the environment for this execution of the program.
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extern char **environ; /* ... */ int main(int argc, char const char *argv[], char const char *envp[]) { printf("environ: %p\n", environ); printf("envp: %p\n", envp); setenv("MY_NEW_VAR", "new_value", 1); puts("--Added MY_NEW_VAR--"); printf("environ: %p\n", environ); printf("envp: %p\n", envp); } |
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int main(int argc, char const char *argv[], char const char *envp[]) { size_t i; setenv("MY_NEW_VAR", "new_value", 1); if (envp != NULL) { for (i = 0; envp[i] != NULL; i++) { puts(envp[i]); } } return 0; } |
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extern char **environ; /* ... */ int main(int argc, char const char *argv[]) { size_t i; setenv("MY_NEW_VAR", "new_value", 1); if (environ != NULL) { for (i = 0; environ[i] != NULL; i++) { puts(environ[i]); } } return 0; } |
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Rule | Severity | Likelihood | Remediation Cost | Priority | Level |
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ENV31-C | 1 ( low ) 1 ( | unlikely ) | 3 ( low ) | P3 | L3 |
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