72 lines
1.2 KiB
C
72 lines
1.2 KiB
C
#include <syscall.h>
|
|
|
|
/* I really need a standard library */
|
|
int
|
|
strlen(
|
|
const char *str
|
|
) {
|
|
int i = 0;
|
|
while (str[i] != (char)0) {
|
|
++i;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
void usage() {
|
|
syscall_print("echo [-n] [-e] [STRING]...\n"
|
|
" -n do not output a new line at the end\n"
|
|
" -e process escape sequences\n");
|
|
}
|
|
|
|
int main(int argc, char ** argv) {
|
|
int start = 1;
|
|
int use_newline = 1;
|
|
int process_escapes = 0;
|
|
|
|
for (int i = start; i < argc; ++i) {
|
|
if (argv[i][0] != '-') {
|
|
start = i;
|
|
break;
|
|
} else {
|
|
if (argv[i][1] == 'h') {
|
|
usage();
|
|
return 1;
|
|
} else if (argv[i][1] == 'n') {
|
|
use_newline = 0;
|
|
} else if (argv[i][1] == 'e') {
|
|
process_escapes = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (int i = start; i < argc; ++i) {
|
|
if (process_escapes) {
|
|
for (int j = 0; j < strlen(argv[i]) - 1; ++j) {
|
|
if (argv[i][j] == '\\') {
|
|
if (argv[i][j+1] == 'e') {
|
|
argv[i][j] = '\033';
|
|
for (int k = j + 1; k < strlen(argv[i]); ++k) {
|
|
argv[i][k] = argv[i][k+1];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
syscall_print(argv[i]);
|
|
if (i != argc - 1) {
|
|
syscall_print(" ");
|
|
}
|
|
}
|
|
|
|
if (use_newline) {
|
|
syscall_print("\n");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* vim:tabstop=4
|
|
* vim:noexpandtab
|
|
* vim:shiftwidth=4
|
|
*/
|