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curl/docs/libcurl/opts/CURLOPT_PROXY_CAPATH.3

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+.\" **************************************************************************
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+.\" * Copyright (C) 1998 - 2019, Daniel Stenberg, <[email protected]>, et al.
+.\" *
+.\" * This software is licensed as described in the file COPYING, which
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+.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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+.\" **************************************************************************
+.\"
+.TH CURLOPT_PROXY_CAPATH 3 "November 04, 2020" "libcurl 7.75.0" "curl_easy_setopt options"
+
+.SH NAME
+CURLOPT_PROXY_CAPATH \- specify directory holding proxy CA certificates
+.SH SYNOPSIS
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_CAPATH, char *capath);
+.SH DESCRIPTION
+Pass a char * to a null-terminated string naming a directory holding multiple
+CA certificates to verify the HTTPS proxy with. If libcurl is built against
+OpenSSL, the certificate directory must be prepared using the openssl c_rehash
+utility. This makes sense only when \fICURLOPT_PROXY_SSL_VERIFYPEER(3)\fP is
+enabled (which it is by default).
+
+The application does not have to keep the string around after setting this
+option.
+.SH DEFAULT
+NULL
+.SH PROTOCOLS
+Everything used over an HTTPS proxy
+.SH EXAMPLE
+.nf
+CURL *curl = curl_easy_init();
+if(curl) {
+  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
+  /* using an HTTPS proxy */
+  curl_easy_setopt(curl, CURLOPT_PROXY, "https://localhost:443");
+  curl_easy_setopt(curl, CURLOPT_PROXY_CAPATH, "/etc/cert-dir");
+  ret = curl_easy_perform(curl);
+  curl_easy_cleanup(curl);
+}
+.fi
+.SH AVAILABILITY
+Added in 7.52.0
+
+This option is supported by the OpenSSL, GnuTLS, and mbedTLS (since 7.56.0)
+backends. The NSS backend provides the option only for backward compatibility.
+.SH RETURN VALUE
+CURLE_OK if supported; or an error such as:
+
+CURLE_NOT_BUILT_IN - Not supported by the SSL backend
+
+CURLE_UNKNOWN_OPTION
+
+CURLE_OUT_OF_MEMORY
+.SH "SEE ALSO"
+.BR CURLOPT_PROXY_CAINFO "(3), "
+.BR CURLOPT_CAINFO "(3), " CURLOPT_PROXY_SSL_VERIFYHOST "(3), "
+.BR CURLOPT_STDERR "(3), " CURLOPT_DEBUGFUNCTION "(3), "