[Rpm-maint] [rpm-software-management/rpm] Make user/group info reliable operation across chroot (PR #2503)

[Neal H. Walfield]

@nwalfield commented on this pull request.



> +			long *ret)
+{
+    char *buf = NULL;
+    int rc = lookup_field(path, val, vcol, rcol, &buf);
+    if (rc == 0) {
+	long num = atol(buf);
+	*ret = num;
+	free(buf);
+    }
+    return rc;
+}
+
+static int lookup_name(const char *path, long val, int vcol, int rcol,
+			char **ret)
+{
+    char vbuf[256];

Is it possible to use [`asprintf`](https://man7.org/linux/man-pages/man3/asprintf.3.html) or is that not portable enough?

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