Date: Sun, 6 Oct 2019 03:59:05 +0000 (UTC) From: Kyle Evans <kevans@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r353135 - in stable: 11/lib/libusb 12/lib/libusb Message-ID: <201910060359.x963x5b9035450@repo.freebsd.org>
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Author: kevans Date: Sun Oct 6 03:59:05 2019 New Revision: 353135 URL: https://svnweb.freebsd.org/changeset/base/353135 Log: MFC r353009: libusb: LIBUSB_DEBUG env var override of libusb_set_debug The debug level generally just controls verbosity of libusb for debugging libusb devices/usage. We allow the environment to set the debug level independent of the application, but the application will always override this if it explicitly sets the debug level. Changing the environment is easy, but patching the software to change the debug level isn't necessarily easy or possible. Further, there's this write-only debug_fixed variable that would seem to imply that the debug level should be fixed, but it isn't currently used. Change the logic to use strtol() so we can detect real 0 vs. conversion failure, then honor debug_fixed in libusb_set_debug. Modified: stable/12/lib/libusb/libusb10.c Directory Properties: stable/12/ (props changed) Changes in other areas also in this revision: Modified: stable/11/lib/libusb/libusb10.c Directory Properties: stable/11/ (props changed) Modified: stable/12/lib/libusb/libusb10.c ============================================================================== --- stable/12/lib/libusb/libusb10.c Sun Oct 6 03:56:02 2019 (r353134) +++ stable/12/lib/libusb/libusb10.c Sun Oct 6 03:59:05 2019 (r353135) @@ -91,7 +91,8 @@ void libusb_set_debug(libusb_context *ctx, int level) { ctx = GET_CONTEXT(ctx); - if (ctx) + /* debug_fixed is set when the environment overrides libusb_set_debug */ + if (ctx && ctx->debug_fixed == 0) ctx->debug = level; } @@ -132,7 +133,7 @@ libusb_init(libusb_context **context) { struct libusb_context *ctx; pthread_condattr_t attr; - char *debug; + char *debug, *ep; int ret; ctx = malloc(sizeof(*ctx)); @@ -143,9 +144,23 @@ libusb_init(libusb_context **context) debug = getenv("LIBUSB_DEBUG"); if (debug != NULL) { - ctx->debug = atoi(debug); - if (ctx->debug != 0) + /* + * If LIBUSB_DEBUG is set, we'll honor that and use it to + * override libusb_set_debug calls. + */ + errno = 0; + ctx->debug = strtol(debug, &ep, 10); + if (errno == 0 && *ep == '\0') { ctx->debug_fixed = 1; + } else { + /* + * LIBUSB_DEBUG conversion failed for some reason, but + * we don't care about the specifics all that much. We + * can't use it either way. Force it to the default, + * 0, in case we had a partial number. + */ + ctx->debug = 0; + } } TAILQ_INIT(&ctx->pollfds); TAILQ_INIT(&ctx->tr_done);
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