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/*
* UNG's Not GNU
*
* Copyright (c) 2011-2017, Jakob Kaivo <jkk@ung.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "sh.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libgen.h>
#include <unistd.h>
int sh_main(int argc, char *argv[])
{
enum { STDIN, INTERACTIVE, COMMAND } mode = STDIN;
int c;
while ((c = getopt(argc, argv, "abCefhimnuvxo:cs")) != -1) {
switch (c) {
case 'a': /** export all variables **/
case 'b': /** notify of background job completions **/
case 'C': /** don't clobber existing files with > **/
case 'e': /** exit on failure **/
case 'f': /** disable pathname expansion **/
case 'h': /** hash utilities in functions when defined **/
case 'n': /** read commands but don't execute **/
case 'u': /** don't expand unset parameters **/
case 'v': /** echo input to /stderr/ **/
case 'x': /** enable tracing **/
sh_set(c, 1);
break;
case 'o': /** enable [option] **/
sh_seto(optarg, 1);
break;
case 'c': /** execute [command_string] and return **/
mode = COMMAND;
break;
case 'i': /** run an interactive shell **/
mode = INTERACTIVE;
break;
case 's': /** read commands from /stdin/ **/
mode = STDIN;
break;
default:
return 1;
}
}
while (argv[optind] && argv[optind][0] == '+') {
/* consume these */
optind++;
}
if (mode == COMMAND) {
/* shift argv */
execvp(argv[optind], argv + optind);
fprintf(stderr, "sh: %s: %s\n", argv[optind], strerror(errno));
return 1;
}
if (argv[optind] == NULL && isatty(STDIN_FILENO) && isatty(STDERR_FILENO)) {
mode = INTERACTIVE;
}
sh_init(mode == INTERACTIVE);
/* set $1-$# */
if (mode == INTERACTIVE) {
return sh_interactive();
}
/* mode is STDIN */
return yyparse();
}
int main(int argc, char *argv[])
{
putenv("PS1=$ ");
char *base = basename(argv[0]);
if (sh_is_regular_builtin(base)) {
return sh_builtin(argc, argv);
}
return sh_main(argc, argv);
}
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