Date: Sat, 29 May 2021 14:59:36 GMT From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: d81f999ac223 - main - rtld direct exec: add option to ignore LD_ variables Message-ID: <202105291459.14TExadZ056959@gitrepo.freebsd.org>
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The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=d81f999ac22342789f2b3e21206d83d410be4df3 commit d81f999ac22342789f2b3e21206d83d410be4df3 Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2021-05-28 23:59:07 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2021-05-29 14:59:09 +0000 rtld direct exec: add option to ignore LD_ variables Sponsored by: The FreeBSD Foundation MFC after: 1 week --- libexec/rtld-elf/rtld.1 | 10 +++++++++- libexec/rtld-elf/rtld.c | 3 +++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/libexec/rtld-elf/rtld.1 b/libexec/rtld-elf/rtld.1 index 7f633ce0b486..16466c7a853e 100644 --- a/libexec/rtld-elf/rtld.1 +++ b/libexec/rtld-elf/rtld.1 @@ -28,7 +28,7 @@ .\" .\" $FreeBSD$ .\" -.Dd March 24, 2021 +.Dd May 29, 2021 .Dt RTLD 1 .Os .Sh NAME @@ -131,6 +131,7 @@ all the environment variables listed below, but is being prefixed with .Ev LD_32_ , for example: .Ev LD_32_TRACE_LOADED_OBJECTS . +If the activated image is setuid or setgid, the variables are ignored. .Bl -tag -width ".Ev LD_LIBMAP_DISABLE" .It Ev LD_DUMP_REL_POST If set, @@ -313,6 +314,8 @@ The syntax of the direct invocation is .Op Fl b Ar exe .Op Fl f Ar fd .Op Fl p +.Op Fl t +.Op Fl v .Op Fl - .Pa image_path .Op Ar image arguments @@ -353,6 +356,11 @@ character, uses the search path provided by the environment variable .Dv PATH to find the binary to execute. +.It Fl t +Ignore all +.Ev LD_ +environment variables that otherwise affect the dynamic +linker behavior. .It Fl v Display information about this run-time linker binary, then exit. .It Fl - diff --git a/libexec/rtld-elf/rtld.c b/libexec/rtld-elf/rtld.c index 75c502e8cc85..a517de83b8f5 100644 --- a/libexec/rtld-elf/rtld.c +++ b/libexec/rtld-elf/rtld.c @@ -5793,6 +5793,8 @@ parse_args(char* argv[], int argc, bool *use_pathp, int *fdp, break; } else if (opt == 'p') { *use_pathp = true; + } else if (opt == 't') { + trust = false; } else if (opt == 'v') { machine[0] = '\0'; mib[0] = CTL_HW; @@ -5863,6 +5865,7 @@ print_usage(const char *argv0) " -b <exe> Execute <exe> instead of <binary>, arg0 is <binary>\n" " -f <FD> Execute <FD> instead of searching for <binary>\n" " -p Search in PATH for named binary\n" + " -t Ignore LD_ environment variables\n" " -v Display identification information\n" " -- End of RTLD options\n" " <binary> Name of process to execute\n"
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