mirror of https://git.qorg11.net/k9core.git
43 lines
687 B
C
43 lines
687 B
C
#include <errno.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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int
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cat(int fd, const char* filename)
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{
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int c;
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char buf[8192];
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if (filename[0] == '-' && filename[1] != 'u')
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fd = 0;
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if (fd != 0)
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fd = open(filename, O_RDONLY);
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if (fd == -1) {
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fprintf(stderr, "error opening %s: %s\n", filename, strerror(errno));
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return -1;
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}
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while ((c = read(fd, buf, sizeof(buf))) > 0) {
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if (c == -1)
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return -1;
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write(1, buf, c);
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}
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close(fd);
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return 0;
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}
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int
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main(int argc, char* argv[])
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{
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getopt(argc, argv, "u");
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if (argc == optind)
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cat(0, "-");
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for (int i = optind; i < argc; i++)
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cat(1, argv[i]);
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return 0;
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}
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