.ref-BSD-2/src/net/nsh.c

/* Copyright (c) 1979 Regents of the University of California */
# include "defs.h"
/*
        count is the # of arguments (= argc) allowed.
        a count of 0 turns off the command */
/* should get route # of Cory RCS lpr */
struct {
        char *app;
        char count;
        char *full;
        char *full1;
        } st[] = {
        "finger",       20,     "/usr/new/finger",      "/usr/bin/finger",
        "lpq",          20,     "/usr/bin/lpq",         "/bin/lpq",
        "mmail",        20,     "/usr/net/bin/mmail",   "/usr/net/bin/mmail",
        "mwrite",       20,     "/usr/net/bin/mwrite",  "/usr/net/bin/mwrite",
        "netq",         20,     "/usr/bin/netq",        "/usr/new/netq",
        "ps",           20,     "/bin/ps",              "/usr/bin/ps",
        "pstat",        20,     "/usr/bin/pstat",       "/bin/pstat",
        "rcs",          20,     "/usr/bin/rcs",         "/bin/rcs",
        "rcslog",       1,      "/usr/bin/rcslog",      "/bin/rcslog",
        "rcsq",         20,     "/usr/bin/rcsq",        "/bin/rcsq",
        "trq",          20,     "/usr/bin/trq",         "/bin/trq",
        "w",            20,     "/usr/bin/w",           "/bin/w",
        "where",        20,     "/usr/bin/where",       "/bin/where",
        "who",          20,     "/bin/who",             "/usr/bin/who",
        "whom",         20,     "/usr/new/whom",        "/usr/bin/whom",
        "write",        20,     "/usr/bin/write",       "/bin/write",
        "yank",         20,     "/usr/new/yank",        "/usr/bin/yank",
        0,              0,              0,              0
        };
/* nsh -c cmd */
main(argc,argv)
  char **argv; {
        char *s, buf[500];
        int i, flg = 0;
        if(argc != 3)exit(8);
        s = argv[2];
        while(*s && *s != ' ')s++;
        if(*s == ' ')flg++;
        *s = 0;
        if((i = mlookup(argv[2])) >= 0){
                if(st[i].count == 0)exit(9);
                if(stat(st[i].full,buf) >= 0)
                        strcpy(buf,st[i].full);
                else strcpy(buf,st[i].full1);
                if(flg && st[i].count > 1){  /* some cmds don't allow parms */
                        *s = ' ';
                        strcat(buf,s);
                        }
                /*
                fprintf(stderr,"%s\n",buf);
                */
                execl(Bsh,"sh","-c",buf,0);
                }
        exit(10);
        }
mlookup(s)
  char *s; {
        int i;
        for(i = 0; st[i].app; i++)
                if(strcmp(st[i].app,s) == 0 || strcmp(st[i].full,s) == 0
                 || strcmp(st[i].full1,s) == 0)return(i);
        return(-1);
        }