1CSEXEC(1)                                                            CSEXEC(1)
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NAME

6       csexec - dynamic linker wrapper
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SYNOPSIS

9       csexec --help | --print-ld-exec-cmd [argv0]
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DESCRIPTION

12       csexec is a wrapper of the system dynamic linker which helps to run
13       dynamic analyzers and formal verifiers on unmodified source RPM
14       packages fully automatically. The wrapper needs to be enabled while
15       linking binaries using cswrap and csexec-loader:
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17           $ export PATH="$(cswrap --print-path-to-wrap):$PATH"
18           $ export CSWRAP_ADD_CFLAGS=-Wl,--dynamic-linker,/usr/bin/csexec-loader
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20       The dynamic analysis tool can be specified at run-time with the
21       CSEXEC_WRAP_CMD environment variable, as in the following example:
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23           $ export CSEXEC_WRAP_CMD=$'valgrind\a--quiet\a--log-file=/dev/tty\a--leak-check=full'
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25       Then the instrumented binaries will automatically launch the specified
26       analyzer for themselves each time they are executed.
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OPTIONS

29       --help
30           Print basic usage information.
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32       --print-ld-exec-cmd [argv0]
33           Print a command prefix that can be used to invoke dynamic linker
34           explicitly.
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EXIT STATUS

37       Non-zero exit status is returned when csexec fails to execute the
38       binary. Otherwise the analyzer (or the binary itself) determines the
39       exit status.
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ENVIRONMENT VARIABLES

42       CSEXEC_WRAP_CMD
43           If set to a non-empty string, csexec prepends the command to be
44           executed with the specified program (analyzer). The program name
45           can be optionally followed by a list of custom arguments for the
46           analyzer, each of them separated by the BEL character. If the value
47           of ${CSEXEC_WRAP_CMD} starts with --skip-ld-linux followed by BEL,
48           csexec does not explicitly invoke the system dynamic linker and it
49           exports the ${CSEXEC_ARGV0} environment variable with the desired
50           value of argv0 (because shebang-executed shell scripts cannot
51           easily access it by other means).
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BUGS

54       Please report bugs and feature requests at
55       https://github.com/csutils/cswrap.
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AUTHOR

58       Written by Kamil Dudka.
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COPYING

61       Copyright (C) 2020-2022 Red Hat, Inc. Free use of this software is
62       granted under the terms of the GNU General Public License (GPL). See
63       the COPYING file for details.
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67                                  09/06/2022                         CSEXEC(1)
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