34 lines
777 B
C
34 lines
777 B
C
// Minimal test shell to verify the execution environment
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#include <stddef.h>
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extern int write(int fd, const void *buf, size_t count);
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extern int read(int fd, void *buf, size_t count);
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int main(int argc, char *argv[], char *envp[]) {
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const char *prompt = "shell> ";
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char buf[128];
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while (1) {
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// Print prompt
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write(1, prompt, 7);
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// Read command
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int n = read(0, buf, sizeof(buf) - 1);
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if (n <= 0) continue;
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buf[n] = '\0';
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// Echo back
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write(1, "You typed: ", 11);
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write(1, buf, n);
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// Check for exit
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if (buf[0] == 'q' && buf[1] == '\n') {
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write(1, "Goodbye!\n", 9);
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break;
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}
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}
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return 0;
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}
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