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