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spz-lab4
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handle symlinks in ls, la and stat, improve resolve_path logging

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ІО-23 Шмуляр Олег 2025-05-18 13:21:19 +03:00
parent 049405989b
commit b6bc6da235
1 changed files with 59 additions and 14 deletions
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73
src/fs.c
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@ -998,6 +998,8 @@ static void resolve_path(struct resolved_path * const rp, const char * const ori
break; break;
} }
pr("Found symlink '%s', following (-> '%s')\n", next_fname, symlink_path);
if (symlink_path[0] == '/') { if (symlink_path[0] == '/') {
memmove(&(path[symlink_path_len]), &(path[i+1]), path_len-i-1); memmove(&(path[symlink_path_len]), &(path[i+1]), path_len-i-1);
strcpy(path, &(symlink_path[1])); strcpy(path, &(symlink_path[1]));
@ -1021,6 +1023,7 @@ static void resolve_path(struct resolved_path * const rp, const char * const ori
} }
} else { } else {
if (!(params & FOLLOW_LAST_SYMLINK)) { if (!(params & FOLLOW_LAST_SYMLINK)) {
pr("Stopping at symlink '%s', not following\n", next_fname);
rp->target_inode_ptr = res; rp->target_inode_ptr = res;
strcpy(rp->parent_fname, current_fname); strcpy(rp->parent_fname, current_fname);
strcpy(rp->target_fname, next_fname); strcpy(rp->target_fname, next_fname);
@ -1045,6 +1048,8 @@ static void resolve_path(struct resolved_path * const rp, const char * const ori
break; break;
} }
pr("Found symlink '%s' at last position, following (-> '%s')\n", next_fname, symlink_path);
if (!strcmp(symlink_path, "/")) { if (!strcmp(symlink_path, "/")) {
rp->parent_inode_ptr = 0; rp->parent_inode_ptr = 0;
rp->target_inode_ptr = 0; rp->target_inode_ptr = 0;
@ -1078,6 +1083,7 @@ static void resolve_path(struct resolved_path * const rp, const char * const ori
rp->target_inode_ptr = -1; rp->target_inode_ptr = -1;
break; break;
} else { } else {
pr("Stopping at regular file '%s'\n", next_fname);
rp->target_inode_ptr = res; rp->target_inode_ptr = res;
strcpy(rp->parent_fname, current_fname); strcpy(rp->parent_fname, current_fname);
strcpy(rp->target_fname, next_fname); strcpy(rp->target_fname, next_fname);
@ -1092,6 +1098,7 @@ static void resolve_path(struct resolved_path * const rp, const char * const ori
strcpy(current_fname, next_fname); strcpy(current_fname, next_fname);
memset(next_fname, 0, FS_MAX_FNAME_LEN); memset(next_fname, 0, FS_MAX_FNAME_LEN);
} else { } else {
pr("Stopping at directory '%s'\n", next_fname);
rp->target_inode_ptr = res; rp->target_inode_ptr = res;
strcpy(rp->parent_fname, current_fname); strcpy(rp->parent_fname, current_fname);
strcpy(rp->target_fname, next_fname); strcpy(rp->target_fname, next_fname);
@ -2419,15 +2426,29 @@ int fs_la(void *d)
struct fs_inode f_inode; struct fs_inode f_inode;
read_block(read_inode_ptr(recs[k].inode_no), (void *) &f_inode); read_block(read_inode_ptr(recs[k].inode_no), (void *) &f_inode);
if (f_inode.ftype == DIRECTORY) { if (f_inode.ftype == REGULAR) {
pr_stdout("%s (inode_ptr=%d -> inode=%d, ref_count=%d, size=%d, type=reg)\n",
recs[k].fname, recs[k].inode_no, read_inode_ptr(recs[k].inode_no),
f_inode.ref_count, f_inode.size);
} else if (f_inode.ftype == DIRECTORY) {
pr_stdout(COLOR_BLUE "%s" COLOR_RESET pr_stdout(COLOR_BLUE "%s" COLOR_RESET
" (inode_ptr=%d -> inode=%d, ref_count=%d, size=%d, type=dir)\n", " (inode_ptr=%d -> inode=%d, ref_count=%d, size=%d, type=dir)\n",
recs[k].fname, recs[k].inode_no, read_inode_ptr(recs[k].inode_no), recs[k].fname, recs[k].inode_no, read_inode_ptr(recs[k].inode_no),
f_inode.ref_count, f_inode.size); f_inode.ref_count, f_inode.size);
} else { } else if (f_inode.ftype == SYMLINK) {
pr_stdout("%s (inode_ptr=%d -> inode=%d, ref_count=%d, size=%d, type=reg)\n", char l_path[FS_MAX_PATH_LEN+1];
recs[k].fname, recs[k].inode_no, read_inode_ptr(recs[k].inode_no), int l_path_len = read_symlink(recs[k].inode_no, l_path);
f_inode.ref_count, f_inode.size);
if (l_path_len > 0)
pr_stdout(COLOR_CYAN "%s" COLOR_RESET
" (inode_ptr=%d -> inode=%d, ref_count=%d, size=%d, type=lnk, -> '%s')\n",
recs[k].fname, recs[k].inode_no, read_inode_ptr(recs[k].inode_no),
f_inode.ref_count, f_inode.size, l_path);
else
pr_stdout(COLOR_RED "%s" COLOR_RESET
" (inode_ptr=%d -> inode=%d, ref_count=%d, size=%d, type=lnk)\n",
recs[k].fname, recs[k].inode_no, read_inode_ptr(recs[k].inode_no),
f_inode.ref_count, f_inode.size);
} }
} }
} }
@ -2454,15 +2475,29 @@ int fs_la(void *d)
struct fs_inode f_inode; struct fs_inode f_inode;
read_block(read_inode_ptr(recs[k].inode_no), (void *) &f_inode); read_block(read_inode_ptr(recs[k].inode_no), (void *) &f_inode);
if (f_inode.ftype == DIRECTORY) { if (f_inode.ftype == REGULAR) {
pr_stdout("%s (inode_ptr=%d -> inode=%d, ref_count=%d, size=%d, type=reg)\n",
recs[k].fname, recs[k].inode_no, read_inode_ptr(recs[k].inode_no),
f_inode.ref_count, f_inode.size);
} else if (f_inode.ftype == DIRECTORY) {
pr_stdout(COLOR_BLUE "%s" COLOR_RESET pr_stdout(COLOR_BLUE "%s" COLOR_RESET
" (inode_ptr=%d -> inode=%d, ref_count=%d, size=%d, type=dir)\n", " (inode_ptr=%d -> inode=%d, ref_count=%d, size=%d, type=dir)\n",
recs[k].fname, recs[k].inode_no, read_inode_ptr(recs[k].inode_no), recs[k].fname, recs[k].inode_no, read_inode_ptr(recs[k].inode_no),
f_inode.ref_count, f_inode.size); f_inode.ref_count, f_inode.size);
} else { } else if (f_inode.ftype == SYMLINK) {
pr_stdout("%s (inode_ptr=%d -> inode=%d, ref_count=%d, size=%d, type=reg)\n", char l_path[FS_MAX_PATH_LEN+1];
recs[k].fname, recs[k].inode_no, read_inode_ptr(recs[k].inode_no), int l_path_len = read_symlink(recs[k].inode_no, l_path);
f_inode.ref_count, f_inode.size);
if (l_path_len > 0)
pr_stdout(COLOR_CYAN "%s" COLOR_RESET
" (inode_ptr=%d -> inode=%d, ref_count=%d, size=%d, type=lnk, -> '%s')\n",
recs[k].fname, recs[k].inode_no, read_inode_ptr(recs[k].inode_no),
f_inode.ref_count, f_inode.size, l_path);
else
pr_stdout(COLOR_RED "%s" COLOR_RESET
" (inode_ptr=%d -> inode=%d, ref_count=%d, size=%d, type=lnk)\n",
recs[k].fname, recs[k].inode_no, read_inode_ptr(recs[k].inode_no),
f_inode.ref_count, f_inode.size);
} }
} }
} }
@ -2486,12 +2521,22 @@ int fs_stat(void *d)
struct fs_inode i; struct fs_inode i;
read_block(read_inode_ptr(rp.target_inode_ptr), &i); read_block(read_inode_ptr(rp.target_inode_ptr), &i);
if (i.ftype == DIRECTORY) { if (i.ftype == REGULAR) {
pr_stdout("inode_ptr=%d -> inode=%d\nref_count=%d\nsize=%d\ntype=dir\n", pr_stdout("inode_ptr=%d -> inode=%d\nref_count=%d\nsize=%d\ntype=regular\n",
rp.target_inode_ptr, read_inode_ptr(rp.target_inode_ptr), i.ref_count, i.size); rp.target_inode_ptr, read_inode_ptr(rp.target_inode_ptr), i.ref_count, i.size);
} else { } else if (i.ftype == DIRECTORY) {
pr_stdout("inode_ptr=%d -> inode=%d\nref_count=%d\nsize=%d\ntype=reg\n", pr_stdout("inode_ptr=%d -> inode=%d\nref_count=%d\nsize=%d\ntype=directory\n",
rp.target_inode_ptr, read_inode_ptr(rp.target_inode_ptr), i.ref_count, i.size); rp.target_inode_ptr, read_inode_ptr(rp.target_inode_ptr), i.ref_count, i.size);
} else if (i.ftype == SYMLINK) {
char l_path[FS_MAX_PATH_LEN+1];
int l_path_len = read_symlink(rp.target_inode_ptr, l_path);
if (l_path_len > 0) {
pr_stdout("inode_ptr=%d -> inode=%d\nref_count=%d\nsize=%d\ntype=symlink\npoints to: %s\n",
rp.target_inode_ptr, read_inode_ptr(rp.target_inode_ptr), i.ref_count, i.size, l_path);
} else {
pr_stdout("inode_ptr=%d -> inode=%d\nref_count=%d\nsize=%d\ntype=symlink\n<broken>\n",
rp.target_inode_ptr, read_inode_ptr(rp.target_inode_ptr), i.ref_count, i.size);
}
} }
return 0; return 0;