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A command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET, TFTP, WS and WSS. libcurl offers a myriad of powerful features
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Viktor Szakats 8afb623bdd
windows: drop redundant curl_wcsdup_callback callback 
This callback was permanently mapped to libcurl's internal
`Curl_wcsdup()`, which always uses the customizable malloc for
allocation, thus making a custom mapping redundant anyway.

To simplify, drop the callback and map `_tcsdup()` in Unicode mode
directly to `Curl_wcsdup()`.

Also fixes:
- `curl_global_init()` which, before this patch, (re)initialized its
  mapping to `_wcsdup()`, returning buffers potentially incompatible
  with a custom allocator.
  Bug: https://github.com/curl/curl/pull/17840#issuecomment-3044361245
  Bug: https://github.com/curl/curl/pull/7540#issuecomment-2380995349
  Co-reported-by: Luca Kellermann

Follow-up to 76e047fc27 #7540
Assisted-by: Jay Satiro

Closes #17843
2025-07-08 13:33:38 +02:00
.circleci CI: sync curl download command-line options 2025-07-07 17:34:47 +02:00
.github GHA: update dependency cloudflare/quiche to v0.24.4 2025-07-07 19:25:24 +02:00
CMake cmake: curl_add_clang_tidy_test_target tidy-ups 2025-07-05 00:40:32 +02:00
docs examples: beef up websocket.c 2025-07-08 13:06:27 +02:00
include curl.h: make CURL_IPRESOLVE_* symbols defined as longs 2025-07-07 14:37:12 +02:00
lib windows: drop redundant curl_wcsdup_callback callback 2025-07-08 13:33:38 +02:00
LICENSES copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
m4 build: drop HAVE_SYS_SOCKET_H and HAVE_SYS_TIME_H macros 2025-06-15 18:44:39 +02:00
packages os400: upgrade ILE/RPG bindings with latest definitions. 2025-07-05 11:59:42 +02:00
plan9 copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
projects windows: reduce/stop loading DLLs at runtime 2025-06-11 05:39:09 +02:00
scripts memory: stop overriding unused wcsdup()/_wcsdup() system functions 2025-07-07 15:03:31 +02:00
src quic: implement CURLINFO_TLS_SSL_PTR 2025-07-06 20:29:54 +02:00
tests windows: drop redundant curl_wcsdup_callback callback 2025-07-08 13:33:38 +02:00
winbuild lib: make curlx_wait_ms() and use it 2025-06-19 15:57:37 +02:00
.dir-locals.el copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
.git-blame-ignore-revs copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
.gitattributes winbuild: MS-DOS batch tidy-ups 2024-07-02 19:26:15 +02:00
.gitignore tidy-up: .gitignore lines mostly 2025-01-27 20:59:46 +01:00
.mailmap ws: tests and fixes 2025-06-02 11:15:38 +02:00
acinclude.m4 build: drop HAVE_SYS_SOCKET_H and HAVE_SYS_TIME_H macros 2025-06-15 18:44:39 +02:00
appveyor.sh appveyor: drop VS2008 CI job, move OpenSSL 1.0.2 to VS2010 2025-07-01 19:47:01 +02:00
appveyor.yml CI: skip CI builds that just touch Dockerfile 2025-07-02 18:28:24 -07:00
buildconf copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
CHANGES.md CHANGES: rename to CHANGES.md, no longer generated 2024-08-01 13:37:12 +02:00
CMakeLists.txt cmake: check USE_WINDOWS_SSPI when adding secur32 to CURL_LIBS 2025-06-24 09:57:42 +02:00
configure.ac autotools: detect and link brotlicommon library for brotli 2025-06-25 19:45:35 +02:00
COPYING COPYING: bump copyright year range to 1996 - 2025 2025-01-01 21:12:12 +01:00
curl-config.in curl-config: fix whitespace in usage text 2025-06-27 01:03:08 +02:00
Dockerfile Dockerfile: update debian:bookworm-slim Docker digest to 6ac2c08 2025-07-01 18:56:28 +02:00
GIT-INFO.md build: drop tool_hugehelp.c.cvs, tidy up macros, drop buildconf.bat 2025-01-26 14:22:49 +01:00
libcurl.pc.in configure: do not echo most inherited LDFLAGS to config files 2024-11-14 09:55:45 +01:00
Makefile.am TLS: remove support for Secure Transport and BearSSL 2025-06-11 07:54:19 +02:00
README docs: minor grammar fixes 2022-09-29 10:44:12 +02:00
README.md spacecheck.pl: drop more exceptions 2025-05-13 16:01:07 +02:00
RELEASE-NOTES RELEASE-NOTES: synced 2025-07-07 09:35:19 +02:00
renovate.json renovate.json: fix patterns for OpenSSL, QuicTLS and generic 2025-07-07 15:23:57 +02:00
REUSE.toml checksrc: reduce exceptions, apply again to curlx 2025-06-27 17:33:35 +02:00
SECURITY.md docs: Clarify OpenSSF Best Practices vs Scorecard 2024-08-22 11:50:20 +02:00

README.md

curl logo

curl is a command-line tool for transferring data specified with URL syntax. Learn how to use curl by reading the manpage or everything curl.

Find out how to install curl by reading the INSTALL document.

libcurl is the library curl is using to do its job. It is readily available to be used by your software. Read the libcurl manpage to learn how.

Open Source

curl is Open Source and is distributed under an MIT-like license.

Contact

Contact us on a suitable mailing list or use GitHub issues/ pull requests/ discussions.

All contributors to the project are listed in the THANKS document.

Commercial support

For commercial support, maybe private and dedicated help with your problems or applications using (lib)curl visit the support page.

Website

Visit the curl website for the latest news and downloads.

Source code

Download the latest source from the Git server:

git clone https://github.com/curl/curl.git

Security problems

Report suspected security problems via our HackerOne page and not in public.

Notice

curl contains pieces of source code that is Copyright (c) 1998, 1999 Kungliga Tekniska Högskolan. This notice is included here to comply with the distribution terms.

Backers

Thank you to all our backers 🙏 Become a backer.

Sponsors

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