40 lines
781 B
C
40 lines
781 B
C
#include<stdio.h>
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#include<stdlib.h>
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#include<sys/wait.h>
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#include<unistd.h>
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#include<string.h>
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char **parse(char *line) {
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char **args= malloc(64 * sizeof(char *));
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int i = 0;
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char *token = strtok(line, " \t\n");
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while(token !=NULL) {
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args[i] = token;
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i++;
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token = strtok(NULL, " \t\n");
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}
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args[i] = NULL;
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return args;
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}
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int main() {
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char line[1024];
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while(1) {
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printf("$");
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fflush(stdout);
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char *result = fgets(line, sizeof(line), stdin);
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if(result == NULL) return 0;
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char **parsed = parse(line);
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if(parsed[0] == NULL) { free(parsed); continue; }
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pid_t pid = fork();
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if(pid == 0) {
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if(execvp(parsed[0], parsed) == -1 ) {
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perror("tinysh");
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exit(1);
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}
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} else if(pid > 0) {
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wait(NULL);
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}
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free(parsed);
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}
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}
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