c - Why does read not work yet fgets work fine in my program? -

so specific part of program looks this:

printf("please input command:\n>"); while 1 {     if ((int c = read(stdin_fileno, input, buffer_size) == 0) {         break;     }     rest of program uses strtok break input      down , store in array. pass function checks      various commands , prints whatever command      suppose or gives syntax error incorrect commands      printf(">"); //last line  } 

so here's happens:

please input command: addperson batman >person added blahblah error: incorrect syntax 

for reason doesn't print: ">". everytime enter after says same thing right commands.

but if use this:

printf("please input command:\n>"); while 1 {     if (fgets(input, buffer_size, stdin) == null) {         break;     }     ...     printf(">");  } 

i get:

please input command: > add_person batman person added > blahbagwa incorrect syntax > add_person superman person added 

notice how ">" appears in each output? don't know why read isn't working properly; perhaps understand of read isn't good. have idea?

read() block until has received enough input fill entire buffer fgets() return buffer each entered line.