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rm.c
162 lines (149 loc) · 2.51 KB
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rm.c
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int errcode;
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/dir.h>
char *sprintf();
main(argc, argv)
char *argv[];
{
register char *arg;
int fflg, iflg, rflg;
fflg = 0;
if (isatty(0) == 0)
fflg++;
iflg = 0;
rflg = 0;
if(argc>1 && argv[1][0]=='-') {
arg = *++argv;
argc--;
while(*++arg != '\0')
switch(*arg) {
case 'f':
fflg++;
break;
case 'i':
iflg++;
break;
case 'r':
rflg++;
break;
default:
printf("rm: unknown option %s\n", *argv);
exit(1);
}
}
while(--argc > 0) {
if(!strcmp(*++argv, "..")) {
fprintf(stderr, "rm: cannot remove `..'\n");
continue;
}
rm(*argv, fflg, rflg, iflg, 0);
}
exit(errcode);
}
rm(arg, fflg, rflg, iflg, level)
char arg[];
{
struct stat buf;
struct direct direct;
char name[100];
int d;
if(stat(arg, &buf)) {
if (fflg==0) {
printf("rm: %s nonexistent\n", arg);
++errcode;
}
return;
}
if ((buf.st_mode&S_IFMT) == S_IFDIR) {
if(rflg) {
if (access(arg, 02) < 0) {
if (fflg==0)
printf("%s not changed\n", arg);
errcode++;
return;
}
if(iflg && level!=0) {
printf("directory %s: ", arg);
if(!yes())
return;
}
if((d=open(arg, 0)) < 0) {
printf("rm: %s: cannot read\n", arg);
exit(1);
}
while(read(d, (char *)&direct, sizeof(direct)) == sizeof(direct)) {
if(direct.d_ino != 0 && !dotname(direct.d_name)) {
sprintf(name, "%s/%.14s", arg, direct.d_name);
rm(name, fflg, rflg, iflg, level+1);
}
}
close(d);
errcode += rmdir(arg, iflg);
return;
}
printf("rm: %s directory\n", arg);
++errcode;
return;
}
if(iflg) {
printf("%s: ", arg);
if(!yes())
return;
}
else if(!fflg) {
if (access(arg, 02)<0) {
printf("rm: %s %o mode ", arg, buf.st_mode&0777);
if(!yes())
return;
}
}
if(unlink(arg) && (fflg==0 || iflg)) {
printf("rm: %s not removed\n", arg);
++errcode;
}
}
dotname(s)
char *s;
{
if(s[0] == '.')
if(s[1] == '.')
if(s[2] == '\0')
return(1);
else
return(0);
else if(s[1] == '\0')
return(1);
return(0);
}
rmdir(f, iflg)
char *f;
{
int status, i;
if(dotname(f))
return(0);
if(iflg) {
printf("%s: ", f);
if(!yes())
return(0);
}
while((i=fork()) == -1)
sleep(3);
if(i) {
wait(&status);
return(status);
}
execl("/bin/rmdir", "rmdir", f, 0);
execl("/usr/bin/rmdir", "rmdir", f, 0);
printf("rm: can't find rmdir\n");
exit(1);
}
yes()
{
int i, b;
i = b = getchar();
while(b != '\n' && b != EOF)
b = getchar();
return(i == 'y');
}