37 lines
562 B
C
37 lines
562 B
C
#include <inc/lib.h>
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char buf[8192];
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void
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cat(int f, char *s)
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{
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long n;
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int r;
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while ((n = read(f, buf, (long)sizeof(buf))) > 0)
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if ((r = write(1, buf, n)) != n)
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panic("write error copying %s: %e", s, r);
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if (n < 0)
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panic("error reading %s: %e", s, n);
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}
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void
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umain(int argc, char **argv)
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{
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int f, i;
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binaryname = "cat";
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if (argc == 1)
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cat(0, "<stdin>");
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else
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for (i = 1; i < argc; i++) {
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f = open(argv[i], O_RDONLY);
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if (f < 0)
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printf("can't open %s: %e\n", argv[i], f);
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else {
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cat(f, argv[i]);
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close(f);
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}
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}
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}
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