root/user/testbin/randcall/gencalls.sh

#!/bin/sh
#
# gencalls.sh - generate calls.c and calls.h
#
# Usage: gencalls.sh callspecs-file

if [ "x$1" = x ]; then
    echo "Usage: $0 callspecs-file"
    exit 1
fi

awk < $1 '

    BEGIN {
        type["ptr"] = "void *";
        type["int"] = "int";
        type["off"] = "off_t";
        type["size"] = "size_t";
        fmt["ptr"] = "%p";
        fmt["int"] = "%d";
        fmt["off"] = "%ld";
        fmt["size"] = "%lu";
        cast["ptr"] = "";
        cast["int"] = "";
        cast["off"] = "(long)";
        cast["size"] = "(unsigned long)";

        printf "/* Automatically generated file; do not edit */\n";
        printf "#include <sys/types.h>\n";
        printf "#include <sys/stat.h>\n";
        printf "#include <assert.h>\n";
        printf "#include <unistd.h>\n";
        printf "#include <stdio.h>\n";
        printf "#include <stdlib.h>\n";
        printf "#include <errno.h>\n";
        printf "#include <err.h>\n";
        printf "\n";
        printf "#include \"extern.h\"\n";
        printf "\n";

        printf "typedef void (*tryfunc)(int dofork);\n";
        printf "\n";

        n=0;
    }

    {
        printf "static\n";
        printf "void\n";
        printf "try_%s(int dofork)\n", $2;
        printf "{\n";
        for (i=3; i<=NF; i++) {
            printf "\t%s a%d = rand%s();\n", type[$i], i-3, $i;
        }
        printf "\tint result, pid, status;\n";
        printf "\tchar buf[128];\n";
        printf "\n";

        printf "\tsnprintf(buf, sizeof(buf), \"%s(", $2;
        for (i=3; i<=NF; i++) {
            printf "%s", fmt[$i];
            if (i<NF) printf ", ";
        }
        printf ")\",\n\t\t";
        for (i=3; i<=NF; i++) {
            printf "%s(a%d)", cast[$i], i-3;
            if (i<NF) printf ", ";
        }
        printf ");\n";
        printf"\tprintf(\"%%-47s\", buf);\n";
        #printf "\tfflush(stdout);\n";
        printf "\n";

        printf "\tpid = dofork ? fork() : 0;\n";
        printf "\tif (pid<0) {\n";
        printf "\t\terr(1, \"fork\");\n";
        printf "\t}\n";
        printf "\tif (pid>0) {\n";
        printf "\t\twaitpid(pid, &status, 0);\n";
        printf "\t\treturn;\n";
        printf "\t}\n";
        printf "\n";

        printf "\tresult = %s(", $2;
        for (i=3; i<=NF; i++) {
            printf "a%d", i-3;
            if (i<NF) printf ", ";
        }
        printf ");\n";

        printf "\tprintf(\" result %%d, errno %%d\\n\", result, errno);\n";
        printf "\tif (dofork) {\n";
        printf "\t\texit(0);\n";
        printf "\t}\n";

        printf "}\n";
        printf "\n";

        asst[$2] = $1;
        all[n++] = $2;
    }

    END {
        for (a=2; a<=5; a++) {
            printf "static tryfunc funcs%d[] = {\n", a;
            for (i=0; i<n; i++) {
                if (asst[all[i]] <= a) {
                    printf "\ttry_%s,\n", all[i];
                }
            }
            printf "\tNULL\n";
            printf "};\n";
            printf "\n";
        }

        printf "static tryfunc *tables[4] = {\n";
        printf "\tfuncs2,\n";
        printf "\tfuncs3,\n";
        printf "\tfuncs4,\n";
        printf "\tfuncs5,\n";
        printf "};\n";
        printf "\n";

        printf "void\n";
        printf "trycalls(int asst, int dofork, int count)\n"
        printf "{\n";
        printf "\ttryfunc *list;\n";
        printf "\tint i, j;\n";
        printf "\n";

        printf "\tassert(asst>=2 && asst<=5);\n";
        printf "\tlist = tables[asst-2];\n";
        printf "\n";

        printf "\tfor (i=0; i<count; i++) {\n";
        printf "\t\tfor (j=0; list[j]; j++) {\n";
        printf "\t\t\t(*list[j])(dofork);\n";
        printf "\t\t}\n";
        printf "\t}\n";
        printf "}\n";
        printf "\n";
    }
'