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shell.c
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1267 lines (1145 loc) · 46.5 KB
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#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <dirent.h>
#include <limits.h>
#include <errno.h>
#include <ctype.h>
#include <strings.h>
#include <stddef.h>
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif
#define MAX_CMD_LENGTH 1024
#define MAX_ARGS 64
// Global variable to track if we're in batch mode
int batch_mode = 0;
int last_exit_code = 0;
// Function declarations
void print_prompt();
char* read_command();
char** parse_command(char* cmd, int* arg_count);
int execute_command(char** args, int arg_count);
void free_args(char** args);
int handle_redirection(char** args, int arg_count);
int is_batch_file(const char* filename);
int execute_batch_file(const char* filename);
char* expand_path(char* path);
char* convert_win_to_unix_path(const char* win_path);
int starts_with(const char* str, const char* prefix);
char* expand_environment_variables(char* str);
void print_help();
int main(int argc, char* argv[]) {
if (argc > 1) {
if (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0) {
printf("Batch Script Shell (BSS) - A shell for executing batch scripts\n");
printf("Usage: %s [batch_file.bat]\n", argv[0]);
printf(" %s -h | --help (show this help)\n", argv[0]);
return 0;
} else {
// Execute batch file
int result = execute_batch_file(argv[1]);
// Reset batch mode after executing batch file from command line
batch_mode = 0;
return result;
}
}
// Interactive mode
char* cmd;
char** args;
int arg_count;
int status = 1;
printf("Batch Script Shell (BSS) - Type 'help' for available commands\n");
do {
print_prompt();
cmd = read_command();
if (cmd == NULL) {
// EOF or error reading command
break;
}
if (strlen(cmd) == 0) {
// Empty command, continue to next prompt
free(cmd);
continue;
}
args = parse_command(cmd, &arg_count);
if (args == NULL) {
free(cmd);
continue;
}
status = execute_command(args, arg_count);
free_args(args);
free(cmd);
} while (status);
return 0;
}
void print_prompt() {
char cwd[PATH_MAX];
if (getcwd(cwd, sizeof(cwd)) != NULL) {
// Convert to Windows-style path for display
char win_path[PATH_MAX];
char* ptr = cwd;
int i = 0;
// If path starts with '/', replace with 'C:\'
if (*ptr == '/') {
strcpy(win_path, "C:\\");
i = 3;
ptr++;
}
while (*ptr != '\0' && i < PATH_MAX-1) {
if (*ptr == '/') {
win_path[i] = '\\';
} else {
win_path[i] = *ptr;
}
i++;
ptr++;
}
win_path[i] = '\0';
printf("%s> ", win_path);
} else {
printf("C:\\> ");
}
fflush(stdout);
}
char* read_command() {
char* line = NULL;
size_t len = 0;
ssize_t read;
read = getline(&line, &len, stdin);
if (read == -1) {
if (feof(stdin)) {
free(line);
return NULL;
} else {
perror("getline");
exit(EXIT_FAILURE);
}
}
// Remove trailing newline
if (line[read - 1] == '\n') {
line[read - 1] = '\0';
}
return line;
}
char** parse_command(char* cmd, int* arg_count) {
char** args = malloc(MAX_ARGS * sizeof(char*));
if (args == NULL) {
perror("malloc");
return NULL;
}
int count = 0;
char* ptr = cmd;
// Handle @echo off and similar commands at start
if (cmd[0] == '@') {
memmove(cmd, cmd + 1, strlen(cmd)); // Remove the '@'
ptr = cmd;
}
// Skip leading whitespace
while (isspace((unsigned char)*ptr)) {
ptr++;
}
while (*ptr != '\0' && count < MAX_ARGS - 1) {
// Skip whitespace
while (isspace((unsigned char)*ptr)) {
ptr++;
}
if (*ptr == '\0') {
break;
}
// Check for redirection operators
if (*ptr == '>' || (*ptr == '>' && *(ptr + 1) == '>') || *ptr == '<') {
// Handle redirection operators as separate tokens
if (*ptr == '>' && *(ptr + 1) == '>') {
// Handle >>
args[count] = strdup(">>");
ptr += 2;
} else if (*ptr == '>') {
// Handle >
args[count] = strdup(">");
ptr += 1;
} else if (*ptr == '<') {
// Handle <
args[count] = strdup("<");
ptr += 1;
}
} else {
// Handle regular arguments (including quoted strings)
char* start = ptr;
if (*ptr == '"') {
// Handle quoted string
start = ptr + 1; // Skip opening quote
ptr++;
while (*ptr != '\0' && *ptr != '"') {
ptr++;
}
if (*ptr == '"') {
*ptr = '\0'; // Terminate the quoted string
ptr++;
}
// Expand environment variables in the quoted argument
char* expanded = expand_environment_variables(start);
args[count] = expanded ? expanded : strdup(start);
} else {
// Handle unquoted string
while (*ptr != '\0' && !isspace((unsigned char)*ptr) &&
*ptr != '>' && *ptr != '<') {
ptr++;
}
// Check if we're at a redirection operator
if (*ptr == '>' || *ptr == '<') {
// Break here to allow the redirection operator to be parsed separately
char temp = *ptr;
*ptr = '\0';
// Expand environment variables in the argument
char* expanded = expand_environment_variables(start);
args[count] = expanded ? expanded : strdup(start);
*ptr = temp; // Restore the character
if (args[count] == NULL) {
perror("strdup");
for (int i = 0; i < count; i++) {
free(args[i]);
}
free(args);
return NULL;
}
count++;
continue; // Continue to parse the redirection operator
} else {
char temp = *ptr;
*ptr = '\0';
// Expand environment variables in the argument
char* expanded = expand_environment_variables(start);
args[count] = expanded ? expanded : strdup(start);
*ptr = temp; // Restore the character
}
}
}
if (args[count] == NULL) {
perror("strdup");
for (int i = 0; i < count; i++) {
free(args[i]);
}
free(args);
return NULL;
}
count++;
}
args[count] = NULL;
*arg_count = count;
return args;
}
int execute_command(char** args, int arg_count) {
last_exit_code = 0;
if (args[0] == NULL) {
return 1; // No command entered, continue shell
}
// Check for redirections first, before handling built-in commands
// This ensures commands with redirections like 'echo Hello > file.txt' work properly
if (handle_redirection(args, arg_count) == 0) {
// Redirection was handled successfully
return 1;
}
// Built-in commands
if (strcmp(args[0], "echo") == 0) {
if (arg_count == 1) {
printf("\n");
} else if (arg_count == 2) {
if (strcmp(args[1], "on") == 0) {
printf("ECHO is on.\n");
} else if (strcmp(args[1], "off") == 0) {
printf("ECHO is off.\n");
} else {
printf("%s\n", args[1]);
}
} else {
for (int i = 1; i < arg_count; i++) {
printf("%s ", args[i]);
}
printf("\n");
}
return 1;
} else if (strcmp(args[0], "set") == 0) {
// Handle SET command to display or set environment variables
if (arg_count == 1) {
// Display all environment variables
extern char **environ;
for (char **env = environ; *env != 0; env++) {
printf("%s\n", *env);
}
} else if (arg_count >= 2) {
// Simple variable setting (not persistent in this implementation)
char* var = args[1];
char* equals = strchr(var, '=');
if (equals != NULL) {
*equals = '\0';
setenv(var, equals + 1, 1);
} else {
// Display specific variable
char* value = getenv(var);
if (value != NULL) {
printf("%s=%s\n", var, value);
} else {
printf("%s\n", var);
}
}
}
return 1;
} else if (strcmp(args[0], "cd") == 0 || strcmp(args[0], "chdir") == 0) {
if (arg_count == 1) {
// No arguments - just print current directory
char cwd[PATH_MAX];
if (getcwd(cwd, sizeof(cwd)) != NULL) {
printf("%s\n", cwd);
}
} else if (arg_count == 2) {
char* path = convert_win_to_unix_path(args[1]);
if (chdir(path) != 0) {
printf("cd: %s: %s\n", path, strerror(errno));
last_exit_code = 1;
}
free(path);
} else {
printf("cd: Too many arguments\n");
last_exit_code = 1;
}
return 1;
} else if (strcmp(args[0], "pwd") == 0) {
char cwd[PATH_MAX];
if (getcwd(cwd, sizeof(cwd)) != NULL) {
printf("%s\n", cwd);
} else {
perror("getcwd() error");
last_exit_code = 1;
return 1;
}
return 1;
} else if (strcmp(args[0], "cls") == 0 || strcmp(args[0], "clear") == 0) {
system("clear");
return 1;
} else if (strcmp(args[0], "pause") == 0) {
if (batch_mode) {
// In batch mode, don't actually pause, just continue
return 1;
} else {
// In interactive mode, behave normally
printf("Press any key to continue . . . ");
getchar();
return 1;
}
} else if (strcmp(args[0], "help") == 0) {
print_help();
return 1;
} else if (strcasecmp(args[0], "exit") == 0) {
int exit_code = 0;
if (arg_count >= 2) {
// Handle special batch parameters like /b
if (strcasecmp(args[1], "/b") == 0) {
// exit /b is used in batch files to exit the batch without terminating shell
// In our context, this should just return from execute_batch_file
// but since we're inside execute_command, we just return normally
if (arg_count >= 3) {
exit_code = atoi(args[2]); // Use the 3rd argument as exit code if provided
last_exit_code = exit_code;
} else {
// With exit /b and no explicit code, preserve the current error level
// This is the Windows batch default behavior
exit_code = last_exit_code;
}
} else {
// Regular exit with numeric code
exit_code = atoi(args[1]);
last_exit_code = exit_code;
}
} else {
// Just 'exit' without arguments - exit with code 0
last_exit_code = exit_code;
}
return 0; // Exit the shell/return from command
} else if (strcasecmp(args[0], "echo.") == 0) {
printf("\n");
return 1;
} else if (strcmp(args[0], "for") == 0) {
// For loops are not supported in this basic shell
// In batch mode, just continue without executing
if (batch_mode) {
return 1;
} else {
printf("Command 'for' not supported in interactive mode\n");
return 1;
}
} else if (strcasecmp(args[0], "choice") == 0) {
// CHOICE command implementation - skip in batch mode to avoid user input
if (batch_mode) {
// In batch mode, just continue without executing (to avoid hanging)
return 1;
} else {
// In interactive mode, we could implement the full choice functionality
// For now, just show what would happen
printf("CHOICE command (not fully implemented in this version):\n");
for (int i = 1; i < arg_count; i++) { // Start from 1 to skip "CHOICE"
printf(" %s", args[i]);
if (i < arg_count - 1) printf(" "); // Add space between arguments except for the last
}
printf("\nThis command would pause for user input in interactive mode\n");
return 1;
}
} else if (strcasecmp(args[0], "find") == 0) {
// FIND command implementation - basic functionality with flag support
if (arg_count < 2) {
printf("FIND: Insufficient arguments\n");
printf("Usage: FIND [/V] [/C] [/I] \"string\" [filename]\n");
last_exit_code = 1;
return 1;
}
// Parse flags
int invert_match = 0; // /V flag - select non-matching lines
int count_only = 0; // /C flag - count matching lines
int ignore_case = 0; // /I flag - ignore case
int start_arg = 1;
// Process any flags at the beginning of the arguments
for (int i = 1; i < arg_count; i++) {
if (strlen(args[i]) >= 2 && args[i][0] == '/') {
if (strcasecmp(args[i] + 1, "V") == 0) {
invert_match = 1;
start_arg++;
} else if (strcasecmp(args[i] + 1, "C") == 0) {
count_only = 1;
start_arg++;
} else if (strcasecmp(args[i] + 1, "I") == 0) {
ignore_case = 1;
start_arg++;
} else {
// Not a recognized flag, so stop flag processing
break;
}
} else {
// This is not a flag, so stop processing flags
break;
}
}
if (start_arg >= arg_count) {
printf("FIND: No search string provided\n");
last_exit_code = 1;
return 1;
}
// Handle the case where quoted strings were split by strtok
// e.g. "find \"search term\" file.txt" becomes ["find", "\"search", "term\"", "file.txt"]
char search_string[MAX_CMD_LENGTH];
int end_arg = arg_count - 1; // assume last arg is filename unless it doesn't look like one
// Check if last argument might be a Windows-style error redirection (e.g. "2>nul") and exclude it
if (arg_count >= 2 && strlen(args[arg_count-1]) > 2 && args[arg_count-1][0] == '2' && args[arg_count-1][1] == '>') {
// This is a redirection pattern like "2>nul", so ignore it and treat the previous arg as filename if appropriate
arg_count--; // Effectively remove the last argument
}
// Check if last argument might be a filename by looking for file extensions or path indicators
int has_filename = (start_arg < arg_count - 1) && // Make sure we still have potential filename arg
(strchr(args[arg_count-1], '.') ||
strchr(args[arg_count-1], '/') ||
strchr(args[arg_count-1], '\\') ||
// Additional patterns that suggest it's a filename
args[arg_count-1][0] == '/' || args[arg_count-1][0] == '\\');
char* filename = has_filename ? args[arg_count - 1] : NULL;
if (has_filename) {
end_arg = arg_count - 2; // Exclude the filename
}
// Reconstruct the search string from multiple arguments, handling quoted fragments
strcpy(search_string, "");
for (int i = start_arg; i <= end_arg; i++) {
if (i > start_arg) strcat(search_string, " ");
const char* arg = args[i];
// Remove leading quote if present
if (arg[0] == '"') {
arg++;
}
// Remove trailing quote if present
size_t arg_len = strlen(arg);
char* temp_arg = strdup(arg);
if (temp_arg && arg_len > 0 && temp_arg[arg_len-1] == '"') {
temp_arg[arg_len-1] = '\0';
}
strcat(search_string, temp_arg ? temp_arg : arg);
free(temp_arg);
}
// If no filename provided, read from stdin in interactive mode
if (filename == NULL && !batch_mode) {
printf("FIND: Reading from stdin (Ctrl+D to end)\n");
char line[MAX_CMD_LENGTH];
int line_num = 1;
int found_count = 0;
while (fgets(line, sizeof(line), stdin) != NULL) {
int match;
if (ignore_case) {
// Manual case-insensitive search
char* lower_line = strdup(line);
char* lower_search = strdup(search_string);
if (lower_line && lower_search) {
for (int j = 0; lower_line[j]; j++) {
lower_line[j] = tolower(lower_line[j]);
}
for (int j = 0; lower_search[j]; j++) {
lower_search[j] = tolower(lower_search[j]);
}
match = (strstr(lower_line, lower_search) != NULL);
free(lower_line);
free(lower_search);
} else {
match = (strstr(line, search_string) != NULL); // fallback to case-sensitive
}
} else {
match = (strstr(line, search_string) != NULL);
}
if (invert_match) {
match = !match; // Invert the match for /V flag
}
if (match) {
found_count++;
if (!count_only) {
printf("%s", line);
}
}
line_num++;
}
if (count_only) {
printf("%d\n", found_count);
}
if (found_count == 0) {
last_exit_code = 1; // Not found
}
return 1;
} else if (filename != NULL) {
// Search in the specified file
FILE* file = fopen(filename, "r");
if (file == NULL) {
printf("FIND: %s: No such file or directory\n", filename);
last_exit_code = 1;
return 1;
}
char line[MAX_CMD_LENGTH];
int line_num = 1;
int found_count = 0;
while (fgets(line, sizeof(line), file) != NULL) {
int match;
if (ignore_case) {
// Manual case-insensitive search
char* lower_line = strdup(line);
char* lower_search = strdup(search_string);
if (lower_line && lower_search) {
for (int j = 0; lower_line[j]; j++) {
lower_line[j] = tolower(lower_line[j]);
}
for (int j = 0; lower_search[j]; j++) {
lower_search[j] = tolower(lower_search[j]);
}
match = (strstr(lower_line, lower_search) != NULL);
free(lower_line);
free(lower_search);
} else {
match = (strstr(line, search_string) != NULL); // fallback to case-sensitive
}
} else {
match = (strstr(line, search_string) != NULL);
}
if (invert_match) {
match = !match; // Invert the match for /V flag
}
if (match) {
found_count++;
if (!count_only) {
printf("%s", line);
}
}
line_num++;
}
fclose(file);
if (count_only) {
printf("%d\n", found_count);
}
if (found_count == 0) {
last_exit_code = 1; // Not found
}
return 1;
} else {
// Search without a file - this would be in stdin in interactive mode
if (batch_mode) {
printf("FIND: No filename provided in batch mode\n");
last_exit_code = 1;
return 1;
} else {
printf("FIND: Reading from stdin (Ctrl+D to end)\n");
char line[MAX_CMD_LENGTH];
int line_num = 1;
int found_count = 0;
while (fgets(line, sizeof(line), stdin) != NULL) {
int match;
if (ignore_case) {
// Manual case-insensitive search
char* lower_line = strdup(line);
char* lower_search = strdup(search_string);
if (lower_line && lower_search) {
for (int j = 0; lower_line[j]; j++) {
lower_line[j] = tolower(lower_line[j]);
}
for (int j = 0; lower_search[j]; j++) {
lower_search[j] = tolower(lower_search[j]);
}
match = (strstr(lower_line, lower_search) != NULL);
free(lower_line);
free(lower_search);
} else {
match = (strstr(line, search_string) != NULL); // fallback to case-sensitive
}
} else {
match = (strstr(line, search_string) != NULL);
}
if (invert_match) {
match = !match; // Invert the match for /V flag
}
if (match) {
found_count++;
if (!count_only) {
printf("%s", line);
}
}
line_num++;
}
if (count_only) {
printf("%d\n", found_count);
}
if (found_count == 0) {
last_exit_code = 1; // Not found
}
return 1;
}
}
} else if (strcasecmp(args[0], "del") == 0 || strcasecmp(args[0], "erase") == 0) {
// DEL/ERASE command implementation
if (arg_count < 2) {
printf("DEL: Insufficient arguments\n");
printf("Usage: DEL filename\n");
last_exit_code = 1;
return 1;
}
if (batch_mode) {
// In batch mode, just try to delete the file
if (remove(args[1]) != 0) {
printf("DEL: Cannot delete %s: %s\n", args[1], strerror(errno));
last_exit_code = 1;
}
} else {
// In interactive mode, maybe ask for confirmation
char response[10];
printf("Delete %s? (Y/N): ", args[1]);
fflush(stdout);
if (fgets(response, sizeof(response), stdin) &&
(response[0] == 'Y' || response[0] == 'y')) {
if (remove(args[1]) != 0) {
printf("DEL: Cannot delete %s: %s\n", args[1], strerror(errno));
last_exit_code = 1;
}
}
}
return 1;
} else if (strcasecmp(args[0], "type") == 0) {
// TYPE command implementation (similar to cat in Linux)
if (arg_count < 2) {
printf("TYPE: Insufficient arguments\n");
printf("Usage: TYPE filename\n");
last_exit_code = 1;
return 1;
}
FILE* file = fopen(args[1], "r");
if (file == NULL) {
printf("TYPE: %s: No such file or directory\n", args[1]);
last_exit_code = 1;
return 1;
}
char line[MAX_CMD_LENGTH];
while (fgets(line, sizeof(line), file) != NULL) {
printf("%s", line);
}
fclose(file);
return 1;
}
// For other commands, try to execute them as external programs
pid_t pid = fork();
if (pid == -1) {
perror("fork");
return 1;
} else if (pid == 0) {
// Child process
if (execvp(args[0], args) == -1) {
perror("Command not found");
exit(EXIT_FAILURE);
}
} else {
// Parent process
int status;
waitpid(pid, &status, 0);
if (WIFEXITED(status)) {
last_exit_code = WEXITSTATUS(status);
} else if (WIFSIGNALED(status)) {
last_exit_code = 128 + WTERMSIG(status);
} else {
last_exit_code = 1;
}
}
return 1;
}
void free_args(char** args) {
for (int i = 0; args[i] != NULL; i++) {
free(args[i]);
}
free(args);
}
int handle_redirection(char** args, int arg_count) {
for (int i = 0; i < arg_count; i++) {
// Check for standard redirection operators
int is_standard_redir = (strcmp(args[i], ">") == 0 || strcmp(args[i], ">>") == 0 || strcmp(args[i], "<") == 0);
// Check for Windows-style error redirection (e.g., "2>nul", "2>error.txt")
int is_error_redir = 0;
char* error_redir_file = NULL;
if (strlen(args[i]) > 2 && args[i][0] == '2' && args[i][1] == '>') {
is_error_redir = 1;
error_redir_file = args[i] + 2; // Point to the filename part
}
if (is_standard_redir || is_error_redir) {
// Found a redirection operator
if (is_standard_redir && i + 1 >= arg_count && strcmp(args[i], "<") != 0) {
// For > and >>, we need a file; for <, the next argument could be optional in some contexts
if (strcmp(args[i], "<") != 0) {
printf("Syntax error: No file specified after redirection operator\n");
last_exit_code = 1;
return -1; // Indicate error
}
}
char* cmd = args[0]; // Command is first argument
char* file = is_standard_redir ? args[i + 1] : error_redir_file; // Get file based on redirection type
// Create new argument list without redirection part
char** new_args = malloc((arg_count) * sizeof(char*)); // Allocate for all possible args
if (new_args == NULL) {
perror("malloc");
return -1;
}
// Copy arguments, skipping the redirection part
int new_idx = 0;
for (int j = 0; j < arg_count; j++) {
if (j == i) {
// Skip this redirection argument
if (is_standard_redir) {
// For standard redirection like ">", skip the next argument (filename) too
j++; // Skip the file argument after the operator
}
continue; // Skip the redirection operator itself
}
new_args[new_idx] = strdup(args[j]);
if (new_args[new_idx] == NULL) {
perror("strdup");
for (int k = 0; k < new_idx; k++) {
free(new_args[k]);
}
free(new_args);
return -1;
}
new_idx++;
}
new_args[new_idx] = NULL; // Set the last element to NULL
// Special handling for echo command with redirection
if (strcmp(cmd, "echo") == 0 && (is_standard_redir || is_error_redir)) {
if (is_standard_redir) {
FILE* f = fopen(file, strcmp(args[i], ">>") == 0 ? "a" : "w");
if (f == NULL) {
perror("fopen");
free_args(new_args);
last_exit_code = 1;
return -1;
}
// Write the echo content to the file
for (int j = 1; j < new_idx; j++) { // Start from 1 to skip "echo", go to new_idx
fputs(new_args[j], f);
if (j < new_idx - 1) { // Add space between arguments
fputc(' ', f);
}
}
fputc('\n', f); // Add newline at the end
fclose(f);
free_args(new_args);
return 0; // Success
} else if (is_error_redir) {
// For error redirection, just continue after removing the redirection arg from args
// This is a simplified approach - a full implementation would redirect stderr
free_args(new_args);
return -1; // Not fully handled, let the normal execution continue
}
} else {
// For other commands, just return -1 to continue with normal execution after filtering args
// But we need to update the original args list, which is not possible here
// A better approach would be to return the modified arguments and have them used
// However, since we can't change the execute_command signature easily,
// we'll execute the command directly here for supported redirections
free_args(new_args);
return -1; // For other commands, return -1 to continue with original args handling
}
}
}
// No redirection operators found
return -1; // Indicate no redirection to handle
}
int is_batch_file(const char* filename) {
const char* ext = strrchr(filename, '.');
return (ext != NULL && (strcmp(ext, ".bat") == 0 || strcmp(ext, ".cmd") == 0));
}
int execute_batch_file(const char* filename) {
// Set batch mode to true when executing a batch file
batch_mode = 1;
last_exit_code = 0;
FILE* file = fopen(filename, "r");
if (file == NULL) {
printf("Error: Cannot open file '%s'\n", filename);
// Reset batch mode before returning
batch_mode = 0;
return 1;
}
char* line = NULL;
size_t len = 0;
ssize_t read;
int echo_on = 1; // Echo is on by default
int script_exit_code = 0;
while ((read = getline(&line, &len, file)) != -1) {
// Remove trailing newline
if (line[read - 1] == '\n') {
line[read - 1] = '\0';
read--;
}
// Skip empty lines
char* trimmed = line;
while (*trimmed && isspace((unsigned char)*trimmed)) {
trimmed++;
}
if (*trimmed == '\0') {
continue;
}
// Check for @echo on/off at the beginning of the line
if (starts_with(trimmed, "@echo off")) {
echo_on = 0;
// Remove the @echo off command and continue to next line
continue;
} else if (starts_with(trimmed, "@echo on")) {
echo_on = 1;
// Remove the @echo on command and continue to next line
continue;
} else if (starts_with(trimmed, "echo off")) {
echo_on = 0;
continue;
} else if (starts_with(trimmed, "echo on")) {
echo_on = 1;
continue;
}
// Skip REM or :: comments
if (strncasecmp(trimmed, "rem", 3) == 0 && (trimmed[3] == '\0' || isspace((unsigned char)trimmed[3]))) {
continue;
}
if (trimmed[0] == ':' && trimmed[1] == ':') {
continue;
}
// Print command if echo is on and it doesn't start with @
if (echo_on && trimmed[0] != '@') {
printf("%s\n", line);
}
// Execute the command
char** args;
int arg_count;
char* cmd_copy = strdup(trimmed);
// Handle @ at the beginning of line (suppress echo)
if (cmd_copy[0] == '@') {
memmove(cmd_copy, cmd_copy + 1, strlen(cmd_copy)); // Remove the '@'
}
args = parse_command(cmd_copy, &arg_count);
if (args != NULL) {
int should_continue = execute_command(args, arg_count);
if (last_exit_code != 0) {
script_exit_code = last_exit_code;
}
free_args(args);
if (should_continue == 0) {
free(cmd_copy);
break;
}
}
free(cmd_copy);
}
free(line);
fclose(file);
// Reset batch mode after completing the batch file
batch_mode = 0;
return script_exit_code;
}
char* convert_win_to_unix_path(const char* win_path) {
char* unix_path = malloc(strlen(win_path) + 1);
if (unix_path == NULL) {
return NULL;
}
strcpy(unix_path, win_path);
// Convert Windows-style paths to Unix-style
for (int i = 0; unix_path[i] != '\0'; i++) {
if (unix_path[i] == '\\') {
unix_path[i] = '/';
}
}
// Handle drive letter mapping (e.g., C:\ to /)
if (strlen(unix_path) >= 3 &&