- WARNSfy
- KNF, ANSIfy, misc cosmetics note: this is small shell, not secure shell.
This commit is contained in:
tsutsui
parent
f893ffa835
commit
84af88e97a
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@ -1,6 +1,7 @@
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# $NetBSD: Makefile,v 1.7 2001/12/12 00:05:10 tv Exp $
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# $NetBSD: Makefile,v 1.8 2011/05/19 22:12:35 tsutsui Exp $
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# Small Shell (i.e. for boot media)
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WARNS?= 4
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PROG= ssh
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NOMAN= # defined
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@ -1,4 +1,4 @@
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/* $NetBSD: ssh.c,v 1.3 2009/10/21 23:12:09 snj Exp $ */
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/* $NetBSD: ssh.c,v 1.4 2011/05/19 22:12:35 tsutsui Exp $ */
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/*
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* Copyright (c) 1995 Gordon W. Ross
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@ -61,7 +61,7 @@ extern int optind, opterr;
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char cur_path[MAXPATH] = "PATH=/bin:/usr/bin";
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char rc_name[] = ".sshrc";
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char *prompt = "ssh: ";
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const char *prompt = "ssh: ";
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int eflag; /* exit on cmd failure */
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int iflag; /* interactive mode (catch interrupts) */
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@ -69,7 +69,7 @@ int sflag; /* read from stdin (ignore file arg) */
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int xflag; /* execution trace */
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/* Command file: name, line number, arg count, arg vector */
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char *cf_name;
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const char *cf_name;
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int cf_line;
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int cf_argc;
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char **cf_argv;
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@ -79,16 +79,23 @@ int run_bg_pid;
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jmp_buf next_cmd;
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void catchsig __P((int sig));
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void child_newfd __P((int setfd, char *file, int otype));
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int find_in_path __P((char *cmd, char *filebuf));
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void print_termsig __P((FILE *fp, int cstat));
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int runfile __P((FILE *fp));
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int main(int, char *[]);
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void catchsig(int sig);
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void child_newfd(int setfd, char *file, int otype);
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int find_in_path(char *cmd, char *filebuf);
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void print_termsig(FILE *fp, int cstat);
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int runfile(FILE *fp);
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int cmd_eval(int, char *[]);
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int cmd_cd(int, char *[]);
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int cmd_exit(int, char *[]);
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int cmd_help(int, char *[]);
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int cmd_path(int, char *[]);
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int cmd_run(int, char *[]);
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main(argc, argv)
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int argc;
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char **argv;
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int
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main(int argc, char *argv[])
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{
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struct sigaction sa;
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FILE *cfp; /* command file ptr */
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@ -116,7 +123,7 @@ main(argc, argv)
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}
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if (error) {
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fprintf(stderr, "usage: ssh [-eisx] [cmd_file [...]]\n");
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exit(1);
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exit(EXIT_FAILURE);
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}
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cf_argc = argc - optind;
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cf_argv = &argv[optind];
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@ -145,7 +152,7 @@ main(argc, argv)
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cfp = fopen(cf_name, "r");
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if (cfp == NULL) {
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perror(cf_name);
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exit(1);
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exit(EXIT_FAILURE);
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}
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error = runfile(cfp);
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fclose(cfp);
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@ -174,13 +181,13 @@ main(argc, argv)
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}
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}
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error = runfile(stdin);
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exit (error);
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exit(error);
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}
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void
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catchsig(sig)
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int sig;
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catchsig(int sig)
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{
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longjmp(next_cmd, sig);
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}
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@ -189,8 +196,7 @@ catchsig(sig)
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* Returns exit status.
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*/
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int
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runfile(cfp)
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FILE *cfp;
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runfile(FILE *cfp)
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{
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char ibuf[MAXLINE];
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char *argv[MAXARGS];
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@ -269,7 +275,7 @@ runfile(cfp)
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break;
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}
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/* return status of last command */
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return (exitcode);
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return exitcode;
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}
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@ -279,9 +285,9 @@ runfile(cfp)
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****************************************************************/
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struct cmd {
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char *name;
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int (*func)();
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char *help;
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const char *name;
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int (*func)(int, char *[]);
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const char *help;
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};
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struct cmd cmd_table[];
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@ -291,9 +297,7 @@ struct cmd cmd_table[];
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* Returns exit status.
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*/
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int
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cmd_eval(argc, argv)
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int argc;
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char **argv;
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cmd_eval(int argc, char *argv[])
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{
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struct cmd *cp;
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@ -305,7 +309,7 @@ cmd_eval(argc, argv)
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if (!strcmp(cp->name, argv[0])) {
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/* Pass only args to builtin. */
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--argc; argv++;
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return (cp->func(argc, argv));
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return cp->func(argc, argv);
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}
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}
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@ -313,7 +317,7 @@ cmd_eval(argc, argv)
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* If no matching builtin, let "run ..."
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* have a chance to try an external.
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*/
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return (cmd_run(argc, argv));
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return cmd_run(argc, argv);
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}
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/*****************************************************************
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@ -323,15 +327,12 @@ cmd_eval(argc, argv)
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* All return an exit status.
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****************************************************************/
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char help_cd[] = "cd [dir]";
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const char help_cd[] = "cd [dir]";
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int
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cmd_cd(argc, argv)
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int argc;
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char **argv;
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cmd_cd(int argc, char *argv[])
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{
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char *dir;
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int err;
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const char *dir;
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if (argc > 0)
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dir = argv[0];
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@ -342,17 +343,15 @@ cmd_cd(argc, argv)
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}
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if (chdir(dir)) {
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perror(dir);
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return (1);
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return 1;
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}
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return(0);
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return 0;
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}
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char help_exit[] = "exit [n]";
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const char help_exit[] = "exit [n]";
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int
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cmd_exit(argc, argv)
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int argc;
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char **argv;
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cmd_exit(int argc, char **argv)
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{
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int val = 0;
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exit(val);
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}
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char help_help[] = "help [command]";
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const char help_help[] = "help [command]";
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int
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cmd_help(argc, argv)
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int argc;
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char **argv;
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cmd_help(int argc, char *argv[])
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{
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struct cmd *cp;
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@ -374,7 +371,7 @@ cmd_help(argc, argv)
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for (cp = cmd_table; cp->name; cp++) {
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if (!strcmp(cp->name, argv[0])) {
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printf("usage: %s\n", cp->help);
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return (0);
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return 0;
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}
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}
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printf("%s: no such command\n", argv[0]);
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@ -385,27 +382,24 @@ cmd_help(argc, argv)
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printf(" %s", cp->name);
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}
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printf("\nFor specific usage: help [command]\n");
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return (0);
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return 0;
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}
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char help_path[] = "path [dir1:dir2:...]";
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const char help_path[] = "path [dir1:dir2:...]";
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int
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cmd_path(argc, argv)
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int argc;
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char **argv;
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cmd_path(int argc, char *argv[])
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{
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int i;
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if (argc <= 0) {
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printf("%s\n", cur_path);
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return(0);
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return 0;
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}
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strncpy(cur_path+5, argv[0], MAXPATH-6);
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putenv(cur_path);
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return (0);
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return 0;
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}
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/*****************************************************************
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* (or zero for a background job)
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****************************************************************/
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char help_run[] = "\
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const char help_run[] = "\
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run [-bg] [-i ifile] [-o ofile] [-e efile] program [args...]\n\
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or simply: program [args...]";
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int
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cmd_run(argc, argv)
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int argc;
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char **argv;
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cmd_run(int argc, char *argv[])
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{
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struct sigaction sa;
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int pid, err, cstat, fd;
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int pid, err, cstat;
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char file[MAXPATHLEN];
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int background;
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char *opt, *ifile, *ofile, *efile;
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goto shift;
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default:
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fprintf(stderr, "run %s: bad option\n", opt);
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return (1);
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return 1;
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shift:
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--argc; argv++;
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}
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@ -467,7 +459,7 @@ cmd_run(argc, argv)
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if (argc <= 0) {
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fprintf(stderr, "%s:%d run: missing command\n",
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cf_name, cf_line);
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return (1);
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return 1;
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}
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/* Commands containing '/' get no path search. */
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strncpy(file, argv[0], sizeof(file)-1);
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if (access(file, X_OK)) {
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perror(file);
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return (1);
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return 1;
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}
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} else {
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if (find_in_path(argv[0], file)) {
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fprintf(stderr, "%s: command not found\n", argv[0]);
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return (1);
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return 1;
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}
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}
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@ -504,23 +496,23 @@ cmd_run(argc, argv)
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}
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err = execve(file, argv, environ);
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perror(argv[0]);
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return (1);
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return 1;
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}
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/* parent */
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/* Handle background option... */
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if (background) {
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fprintf(stderr, "[%d]\n", pid);
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run_bg_pid = pid;
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return (0);
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return 0;
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}
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if (waitpid(pid, &cstat, 0) < 0) {
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perror("waitpid");
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return (1);
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return 1;
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}
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if (WTERMSIG(cstat)) {
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print_termsig(stderr, cstat);
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}
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return (WEXITSTATUS(cstat));
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return WEXITSTATUS(cstat);
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}
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/*****************************************************************
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@ -532,7 +524,7 @@ struct cmd cmd_table[] = {
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{ "help", cmd_help, help_help },
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{ "path", cmd_path, help_path },
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{ "run", cmd_run, help_run },
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{ 0 },
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{ NULL, NULL, NULL },
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};
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/*****************************************************************
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@ -540,9 +532,7 @@ struct cmd cmd_table[] = {
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****************************************************************/
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int
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find_in_path(cmd, filebuf)
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char *cmd;
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char *filebuf;
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find_in_path(char *cmd, char *filebuf)
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{
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char *dirp, *endp, *bufp; /* dir, end */
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@ -555,12 +545,12 @@ find_in_path(cmd, filebuf)
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*bufp++ = '/';
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strcpy(bufp, cmd);
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if (access(filebuf, X_OK) == 0)
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return (0);
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return 0;
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if (*endp == ':')
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endp++;
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dirp = endp; /* next dir */
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}
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return (-1);
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return -1;
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}
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/*
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@ -568,17 +558,17 @@ find_in_path(cmd, filebuf)
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* which was opened with OTYPE and MODE.
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*/
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void
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child_newfd(setfd, file, otype)
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int setfd; /* what to set (i.e. 0,1,2) */
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char *file;
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int otype; /* O_RDONLY, etc. */
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child_newfd(int setfd, char *file, int otype)
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/* int setfd; what to set (i.e. 0,1,2) */
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/* char *file; */
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/* int otype; O_RDONLY, etc. */
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{
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int newfd;
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close(setfd);
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if ((newfd = open(file, otype, def_omode)) < 0) {
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perror(file);
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exit(1);
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exit(EXIT_FAILURE);
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}
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if (newfd != setfd) {
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dup2(newfd, setfd);
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@ -587,9 +577,7 @@ child_newfd(setfd, file, otype)
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}
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void
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print_termsig(fp, cstat)
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FILE *fp;
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int cstat;
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print_termsig(FILE *fp, int cstat)
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{
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fprintf(fp, "Terminated, signal %d",
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WTERMSIG(cstat));
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