| 1 | #!/bin/bash |
| 2 | # SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
| 3 | |
| 4 | # example usage: |
| 5 | # lttng-get-syscall-inout.sh table-syscall-inout.txt select 1 |
| 6 | |
| 7 | FILENAME=$1 |
| 8 | SYSCALL_NAME=$2 |
| 9 | ARG_NR=$3 |
| 10 | TMPFILE=$(mktemp) |
| 11 | |
| 12 | # Delete temp file on exit |
| 13 | trap 'rm -f "$TMPFILE"' EXIT |
| 14 | |
| 15 | |
| 16 | if [ x"${FILENAME}" = x"" ]; then |
| 17 | echo "Error: Please specify input file name as first argument" >&2 |
| 18 | exit 1 |
| 19 | fi |
| 20 | |
| 21 | if [ x"${SYSCALL_NAME}" = x"" ]; then |
| 22 | echo "Error: Please specify system call name as second argument" >&2 |
| 23 | exit 1 |
| 24 | fi |
| 25 | |
| 26 | if [[ x"${ARG_NR}" = x"" || ${ARG_NR} == 0 ]]; then |
| 27 | echo "Error: Please specify argument number larger than 0 as third argument" >&2 |
| 28 | exit 1 |
| 29 | fi |
| 30 | |
| 31 | # Abort on error and undefined variable |
| 32 | set -eu |
| 33 | |
| 34 | # Get the required syscall |
| 35 | grep "syscall ${SYSCALL_NAME} " "${FILENAME}" > "${TMPFILE}" || true |
| 36 | |
| 37 | # Error out if we got more than one syscall |
| 38 | NR_MATCH=$(wc -l < "${TMPFILE}") |
| 39 | if [ "${NR_MATCH}" -gt 1 ]; then |
| 40 | echo "Error: more than one system call match" >&2 |
| 41 | exit 1 |
| 42 | fi |
| 43 | |
| 44 | # Default to sc_inout for unknown syscalls |
| 45 | if [ "${NR_MATCH}" -eq 0 ]; then |
| 46 | echo "Warning: no match for syscall '${SYSCALL_NAME}', set to 'inout'" >&2 |
| 47 | # no match, default to inout |
| 48 | echo "sc_inout" |
| 49 | exit 0 |
| 50 | fi |
| 51 | |
| 52 | # Get the number of argument |
| 53 | SC_ARGS=$(sed 's/^syscall \([^ ]*\) nbargs \([^ ]*\) .*/\2/g' "${TMPFILE}") |
| 54 | |
| 55 | if [ "${ARG_NR}" -gt "${SC_ARGS}" ]; then |
| 56 | echo "Error: argument number (${ARG_NR}) is larger than number of syscall arguments (${SC_ARGS})" >&2 |
| 57 | exit 1 |
| 58 | fi |
| 59 | |
| 60 | if [ "${ARG_NR}" == 1 ]; then |
| 61 | SC_ARG_TYPE=$(sed 's/^syscall \([^ ]*\) nbargs \([^ ]*\) rw: (\([^,)]*\).*/\3/g' "${TMPFILE}") |
| 62 | fi |
| 63 | |
| 64 | if [ "${ARG_NR}" == 2 ]; then |
| 65 | SC_ARG_TYPE=$(sed 's/^syscall \([^ ]*\) nbargs \([^ ]*\) rw: ([^,]*, \([^,)]*\).*/\3/g' "${TMPFILE}") |
| 66 | fi |
| 67 | |
| 68 | if [ "${ARG_NR}" == 3 ]; then |
| 69 | SC_ARG_TYPE=$(sed 's/^syscall \([^ ]*\) nbargs \([^ ]*\) rw: ([^,]*, [^,]*, \([^,)]*\).*/\3/g' "${TMPFILE}") |
| 70 | fi |
| 71 | |
| 72 | if [ "${ARG_NR}" == 4 ]; then |
| 73 | SC_ARG_TYPE=$(sed 's/^syscall \([^ ]*\) nbargs \([^ ]*\) rw: ([^,]*, [^,]*, [^,]*, \([^,)]*\).*/\3/g' "${TMPFILE}") |
| 74 | fi |
| 75 | |
| 76 | if [ "${ARG_NR}" == 5 ]; then |
| 77 | SC_ARG_TYPE=$(sed 's/^syscall \([^ ]*\) nbargs \([^ ]*\) rw: ([^,]*, [^,]*, [^,]*, [^,]*, \([^,)]*\).*/\3/g' "${TMPFILE}") |
| 78 | fi |
| 79 | |
| 80 | if [ "${ARG_NR}" == 6 ]; then |
| 81 | SC_ARG_TYPE=$(sed 's/^syscall \([^ ]*\) nbargs \([^ ]*\) rw: ([^,]*, [^,]*, [^,]*, [^,]*, [^,]*, \([^,)]*\).*/\3/g' "${TMPFILE}") |
| 82 | fi |
| 83 | |
| 84 | |
| 85 | if [ "${SC_ARG_TYPE}" = "r" ]; then |
| 86 | echo "sc_in" |
| 87 | fi |
| 88 | if [ "${SC_ARG_TYPE}" = "w" ]; then |
| 89 | echo "sc_out" |
| 90 | fi |
| 91 | if [ "${SC_ARG_TYPE}" = "rw" ]; then |
| 92 | echo "sc_inout" |
| 93 | fi |
| 94 | |
| 95 | # EOF |