Mark
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
#include <sys/ioctl.h>
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#include <termios.h>
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#include <unistd.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdio.h>
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int main(int argc, char **argv) {
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// 25 x 3
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size_t width;
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size_t cols = 4;
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struct winsize winsz;
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int index = 0;
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char linebuf[1024];
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if (!isatty(STDOUT_FILENO)) {
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fprintf(stderr, "stdout is not a TTY\n");
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return -1;
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}
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// Get terminal width
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if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsz) != 0) {
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perror("stdout");
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return -1;
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}
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width = (winsz.ws_col - 1) / cols;
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while (fgets(linebuf, sizeof(linebuf), stdin)) {
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// Remove trailing \n
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char *p = strchr(linebuf, '\n');
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if (p && *linebuf) {
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*p = 0;
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}
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// Skip leading whitespace
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p = linebuf;
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while (isspace(*p)) {
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++p;
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}
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size_t len = strlen(p);
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if (len > width) {
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len = width;
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}
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fwrite(p, 1, len, stdout);
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for (size_t i = len; i < width; ++i) {
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fputc(' ', stdout);
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}
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if ((++index) == cols) {
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fputc('\n', stdout);
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index = 0;
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}
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}
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if (index != 0) {
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fputc('\n', stdout);
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}
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fflush(stdout);
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return 0;
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}
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