125 lines
2.5 KiB
C
125 lines
2.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include <signal.h>
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#include <string.h>
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#include <limits.h>
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#include "icmd.h"
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#define INPUT_MAX_LEN 1024
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#define PATH_MAX_LEN 4096
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#define TOKENS_NUM_MAX 512
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#define TOKENS_ARGS_SIZE 2048
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char *g_tokens[TOKENS_NUM_MAX];
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char g_args[TOKENS_ARGS_SIZE];
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void
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die(int status, char *format, ...)
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{
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va_list args;
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va_start(args, format);
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if (status != 0)
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puts("Error: ");
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vprintf(format, args);
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if (status != 0)
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puts("! Exiting...");
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putchar('\n');
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if (status < 0)
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perror("Reason");
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exit(status);
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va_end(args);
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}
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void
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sighup(int signal)
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{
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die(1, "Parent process has ben killed");
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}
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void
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sigint(int signal)
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{
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die(0, "Caught ^C");
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}
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int
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tokenize(char *input)
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{
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char curr, prev = '\n';
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char **tokens = g_tokens;
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char *start = g_args;
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char *args = g_args;
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int real_input = 0;
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int argc = 0;
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while ((curr = *input++) != '\0')
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{
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if (curr == ' ' || curr == '\n')
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{
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if (curr == prev || !real_input)
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continue;
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*tokens++ = start;
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*args++ = '\0';
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start = args;
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argc++;
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if (curr == '\n')
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break;
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} else
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{
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*args++ = curr;
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real_input = 1;
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}
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prev = curr;
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}
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tokens = NULL;
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return argc;
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}
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int
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main(int argc, char **argv)
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{
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char input[INPUT_MAX_LEN];
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char cwd[PATH_MAX_LEN];
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int num_tokens, ret;
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signal(SIGINT, sigint);
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signal(SIGHUP, sighup);
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signal(SIGQUIT, sighup);
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for (;;)
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{
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if (getcwd(cwd, sizeof(cwd)) == NULL)
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die(-1, "Could not get current directory");
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printf("[%s] ", cwd);
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if (!fgets(input, sizeof(input)-1, stdin))
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die(0, "Caught ^D");
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if ((num_tokens = tokenize(input)) < 0)
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die(1, "Could not parse tokens");
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if (num_tokens == 0)
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continue;
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if ((ret = call_icmd(num_tokens, g_tokens) < 0))
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puts("Internal command failed!");
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}
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}
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