36 lines
731 B
C
36 lines
731 B
C
#include <stdio.h>
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#include <unistd.h>
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int lc(FILE* fp)
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{
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char c[1];
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int num_lines = 0;
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int fn = fileno(fp);
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while (read(fn, c, sizeof(c)) > 0) {
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if (*c == '\n' ) {
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num_lines ++;
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}
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}
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printf("%i\n", num_lines);
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return 0;
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}
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int main(int argc, char** argv)
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{
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if (argc == 1) {
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return lc(stdin);
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} else if (argc > 1) {
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FILE* fp = fopen(argv[1], "r");
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if (!fp) {
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perror("Could not open file");
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return 1;
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}
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return lc(fp) && fclose(fp);
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} else {
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printf("Usage: lc file.txt\n");
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printf(" or: cat file.txt | lc\n");
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printf(" or: lc # read from user-inputted stdin\n");
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}
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return 0;
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}
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