92 lines
1.7 KiB
C
92 lines
1.7 KiB
C
#include "main.h"
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int main() {
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int status = 0;
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size_t input_size = 2048;
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size_t getline_len;
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char* input = malloc(sizeof(char) * input_size);
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while(1) {
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printf(": ");
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fflush(stdout);
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getline_len = getline(&input, &input_size, stdin);
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input[getline_len - 1] = '\0';
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// Ignore whitespace or comments
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if(input == NULL ||
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input[0] == '#') {
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continue;
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}
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char*** array = malloc(sizeof(char**));
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int num_strings = input_format(input, input_size, array);
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char* first_array = (*array)[0];
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// Built in shell commands
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if(!strncmp(first_array, "exit", 4))
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return 0;
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else if(!strncmp(first_array, "cd", 2))
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inbuilt_cd((*array)[1]);
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else if (!strncmp(first_array, "status", 6))
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printf("%d\n", status);
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else
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status = run_command(array, num_strings);
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fflush(stdout);
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}
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}
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int input_format(char* input, size_t input_size, char*** array) {
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const int max_args = 512;
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int num_strings = 0;
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char* pch;
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*array = malloc(sizeof(char*) * max_args);
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pch = strtok (input," ");
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while (pch != NULL)
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{
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(*array)[num_strings] = malloc(sizeof(char*) * (strlen(pch) + 1));
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strcpy((*array)[num_strings], pch);
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num_strings++;
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pch = strtok (NULL, " ");
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}
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return num_strings;
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}
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void inbuilt_cd(char* args) {
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if(args)
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chdir(args);
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else
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chdir(getenv("HOME"));
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}
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int run_command(char*** array, int num_array) {
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char* comb_string = malloc(sizeof(char) * 100);
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sprintf(comb_string, "/usr/bin/");
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strcat(comb_string, (*array)[0]);
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int f = fork();
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pid_t pid;
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if(!f)
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pid = execv(comb_string, (*array));
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int status;
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waitpid(pid, &status, 0);
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free(comb_string);
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return status;
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}
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