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Diffstat (limited to 'sh/sh.c')
| -rw-r--r-- | sh/sh.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/sh/sh.c b/sh/sh.c deleted file mode 100644 index 2e44d9e..0000000 --- a/sh/sh.c +++ /dev/null @@ -1,158 +0,0 @@ -/* sh - the standard command language interpreter - * Copyright (C) 2022 Ferass EL HAFIDI - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the copyright holder nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -/* Here's the POSIX specification of sh: */ -/* https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html */ - -/* Define feature test macro. It doesn't compile with gcc without that for - * some reason. - */ -#define _POSIX_C_SOURCE 200809L - -/* POSIX Header files */ -#include <stdio.h> -#include <unistd.h> -#include <string.h> -#include <stdlib.h> -#include <fcntl.h> -#include <errno.h> -#include <stdint.h> -#include <sys/wait.h> -#include <spawn.h> -#include <libgen.h> -#include <signal.h> - -/* Our own header files */ -#include "parser.h" -#include "version.h" - -#ifndef COMPILETIME -#define COMPILETIME -#endif - -#warning "This shell implementation is really buggy and incomplete. \ - Please don't use this as a /bin/sh replacement." - -void commandLoop(); -int getopt(int argc, char *const argv[], const char *optstring); -char *pathSearch(const char *path, const char *name); -void printUsage(); - -int main(int argc, char *const argv[]) { - int argument, i = 1; - FILE *file; - char param[256]; - struct sigaction signal_action; - signal_action.sa_handler = SIG_IGN; - sigemptyset(&signal_action.sa_mask); - for (; i <= 256; i++) param[i] = 0; - - while ((argument = getopt(argc, argv, "c")) != -1) { - if (argument == '?') { - printUsage(); - return 1; - } - param[(uint8_t)argument] = argument; - } - argc -= optind; - argv += optind; - - sigaction(SIGINT, &signal_action, NULL); - if (errno) return errno; - - if (argv[0]) { - file = fopen(argv[0], "r"); - if (errno) return errno; - commandLoop(file); - } - else commandLoop(stdin); - return 0; -} - -/* USAGE - * ----- - * commandLoop() - * - * DESCRIPTION - * ----------- - * This function is the actual command prompt. - */ - -void commandLoop(FILE *filstr) { - struct sigaction signal_action; - char *prompt = getenv("PS1"); - char *path = getenv("PATH"); - char *token, *tokenstate; - char *command[4096]; - pid_t isparent; - char name[4096], tempstr[4096]; - int return_code; - int command_argc; - if (prompt == NULL) prompt = "$ "; - for (;;) { - for (int i = 0; i <= 4096; i++) { - name[i] = 0; /* (Re)Initialise name and command, - * very important. */ - command[i] = 0; - } - setvbuf(stdout, NULL, _IONBF, 0); - if (filstr == stdin && isatty(STDIN_FILENO)) printf(prompt); - if (fgets(name, 4096, filstr) == NULL) - break; - //read(fildes, name, 4096); - if (!strcmp(name, "\n")) - continue; - else if (*name == 0 || *name == EOF) { - putchar('\n'); - break; - } - name[strlen(name) - 1] = 0; - strcpy(tempstr, name); /* We don't want to override `name`. */ - if (strtok(tempstr, ";") != NULL && strtok(NULL, ";") != NULL) { - /* Hacky wacky hack. */ - strcpy(tempstr, name); - token = strtok_r(tempstr, ";", &tokenstate); - for (; token != NULL;) { - command_argc = splitCommand(token, command); /* See parser.c */ - parseCommand(command_argc, command); /* See parser.c */ - token = strtok_r(NULL, ";", &tokenstate); - } - } - else { - command_argc = splitCommand(name, command); /* See parser.c */ - parseCommand(command_argc, command); /* See parser.c */ - } - } -} - -void printUsage() { - printf("Ferass' Base System. (%s)\n\n" - "Usage: sh [-c command_string]\n\n" - "The standard command language interpreter.\n\n" - "\t-c command_string\tExecute command_string and exit.\n", COMPILETIME); -} |