forked from Bananymous/banan-os
51 lines
712 B
C++
51 lines
712 B
C++
#include <fcntl.h>
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#include <stdio.h>
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bool cat_file(int fd)
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{
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char last = '\0';
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char buffer[1024];
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while (ssize_t n_read = read(fd, buffer, sizeof(buffer)))
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{
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if (n_read == -1)
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{
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perror("read");
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return false;
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}
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write(STDOUT_FILENO, buffer, n_read);
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last = buffer[n_read - 1];
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}
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if (last != '\n')
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write(STDOUT_FILENO, "\n", 1);
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return true;
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}
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int main(int argc, char** argv)
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{
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int ret = 0;
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if (argc > 1)
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{
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for (int i = 1; i < argc; i++)
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{
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int fd = open(argv[i], O_RDONLY);
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if (fd == -1)
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{
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perror(argv[i]);
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ret = 1;
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continue;
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}
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if (!cat_file(fd))
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ret = 1;
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close(fd);
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}
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}
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else
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{
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if (!cat_file(STDIN_FILENO))
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ret = 1;
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}
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return ret;
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}
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