40 lines
617 B
C
40 lines
617 B
C
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#include <ctype.h>
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#include "c.h"
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#include "ttyutils.h"
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int get_terminal_width(void)
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{
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#ifdef TIOCGSIZE
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struct ttysize t_win;
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#endif
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#ifdef TIOCGWINSZ
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struct winsize w_win;
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#endif
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const char *cp;
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#ifdef TIOCGSIZE
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if (ioctl (0, TIOCGSIZE, &t_win) == 0)
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return t_win.ts_cols;
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#endif
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#ifdef TIOCGWINSZ
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if (ioctl (0, TIOCGWINSZ, &w_win) == 0)
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return w_win.ws_col;
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#endif
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cp = getenv("COLUMNS");
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if (cp) {
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char *end = NULL;
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long c;
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errno = 0;
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c = strtol(cp, &end, 10);
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if (errno == 0 && end && *end == '\0' && end > cp &&
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c > 0 && c <= INT_MAX)
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return c;
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}
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return 0;
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}
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