int main()
{
int len; /* 当前行长度 */
char line[MAXLINE]; /* 当前的输入行 */
while ((len = gettheline(line, MAXLINE)) > 0)
if (len > THISLINE)
{
printf("%d, %s\n", len, line);
}
return 0;
}
int main(int argc, char *argv[]) {
FILE *tfp,*f;
char user[MAX_STRING_LEN];
char line[MAX_STRING_LEN];
char l[MAX_STRING_LEN];
char w[MAX_STRING_LEN];
char command[MAX_STRING_LEN];
int found;
tfd = -1;
signal(SIGINT,(void (*)(int))interrupted);
if(argc == 4) {
if(strcmp(argv[1],"-c"))
usage();
if(!(tfp = fopen(argv[2],"w"))) {
fprintf(stderr,"Could not open passwd file %s for writing.\n",
argv[2]);
perror("fopen");
exit(1);
}
printf("Adding password for %s.\n",argv[3]);
add_password(argv[3],tfp);
fclose(tfp);
exit(0);
} else if(argc != 3) usage();
tfd = mkstemp(temp_template);
if(!(tfp = fdopen(tfd,"w"))) {
fprintf(stderr,"Could not open temp file.\n");
exit(1);
}
if(!(f = fopen(argv[1],"r"))) {
fprintf(stderr,
"Could not open passwd file %s for reading.\n",argv[1]);
fprintf(stderr,"Use -c option to create new one.\n");
exit(1);
}
strcpy(user,argv[2]);
found = 0;
while(!(gettheline(line,MAX_STRING_LEN,f))) {
if(found || (line[0] == '#') || (!line[0])) {
putline(tfp,line);
continue;
}
strcpy(l,line);
getword(w,l,':');
if(strcmp(user,w)) {
putline(tfp,line);
continue;
}
else {
printf("Changing password for user %s\n",user);
add_password(user,tfp);
found = 1;
}
}
if(!found) {
printf("Adding user %s\n",user);
add_password(user,tfp);
}
fclose(f);
fclose(tfp);
sprintf(command,"cp %s %s",temp_template,argv[1]);
system(command);
unlink(temp_template);
exit(0);
}
