ref: e6c6217b35c319127f0200fdb28ec86e1b774a4f
dir: /sys/src/cmd/echo.c/
#include <u.h> #include <libc.h> void main(int argc, char *argv[]) { int nflag; int i, len; char *buf, *p; nflag = 0; if(argc > 1 && strcmp(argv[1], "-n") == 0) nflag = 1; len = 1; for(i = 1+nflag; i < argc; i++) len += strlen(argv[i])+1; buf = malloc(len); if(buf == 0) exits("no memory"); p = buf; for(i = 1+nflag; i < argc; i++){ strcpy(p, argv[i]); p += strlen(p); if(i < argc-1) *p++ = ' '; } if(!nflag) *p++ = '\n'; if(write(1, buf, p-buf) < 0){ fprint(2, "echo: write error: %r\n"); exits("write error"); } exits((char *)0); }