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This noncompliant code example copies the string returned by getenv() into a fixed-size buffer.
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void f() {
char path[PATH_MAX]; /* requires PATH_MAX to be defined */
strcpy(path, getenv("PATH"));
/* use path */
}
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In the following compliant solution, the strlen() function is used to calculate the size of the string, and the required space is dynamically allocated.
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void f() {
char *path = NULL;
/* avoid assuming $PATH is defined or has limited length */
const char *temp = getenv("PATH");
if (temp != NULL) {
path = (char*) malloc(strlen(temp) + 1);
if (path == NULL) {
/* Handle error condition */
} else {
strcpy(path, temp);
}
/* use path */
}
}
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