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#include <sys/socket.h>
#include <sys/un.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <readline/readline.h>
#include <readline/history.h>
char *prompt = "> ";
void usage(char *prog) {
fprintf(stderr, "usage: %s [-v] [-f file]\n", prog);
fprintf(stderr, " -v verbose\n");
fprintf(stderr, " -f file to from\n");
exit(-1);
}
int verbose;
char *file;
FILE *filef;
char buf[256]; // max line length
char *next_line() {
size_t len;
char *line,*tmp;
if (file) line=fgets(buf,sizeof(buf), filef);
else line=readline(prompt); // must free it
if (!line) goto done;
len = strlen(line);
if (file) {
/* fgets keeps trailing newline. null it out. if absent, line got truncated*/
if (buf[len-1] == '\n') buf[len-1]='\0';
else { fprintf(stderr, "line too long\n"); line=NULL; }
} else {
/* copy the mallocd readline buffer and free it */
tmp = line;
if (len+1 < sizeof(buf)) {memcpy(buf, line, len+1); line=buf;}
else { fprintf(stderr, "line too long\n"); line=NULL; }
free(tmp);
}
done:
if (file && !line) fclose(filef);
return line;
}
int main(int argc, char *argv[]) {
char *line;
int opt;
while ( (opt = getopt(argc, argv, "v+f:")) != -1) {
switch (opt) {
case 'v': verbose++; break;
case 'f': file = strdup(optarg); break;
default: usage(argv[0]); break;
}
}
if (optind < argc) usage(argv[0]);
using_history();
if (file && !(filef = fopen(file,"r"))) {
perror("fopen error");
exit(-1);
}
while ( (line=next_line()) != NULL) {
printf("line is %s\n",line);
add_history(line);
}
return 0;
}
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