fmt

1 files changed, 196 insertions, 181 deletions

diff --git a/kernel/fs/tar.c b/kernel/fs/tar.c
index 4e66944..462200b 100644
--- a/kernel/fs/tar.c
+++ b/kernel/fs/tar.c
@@ -2,62 +2,61 @@
 #include <lib.h>
 #include <comus/tar.h>
 
-
 // the placements of these values mimics their placement in standard UStar
 struct tar_header {
-    char name[100]; // 0-99
-    char mode[8]; // 100-107
-    char ownerUID[8]; // 108-115
-    char groupUID[8]; // 116-123
-    char fileSize[12]; // 124-135
-    char lastMod[12]; // 136-147
-    char checksum[8]; // 148-155
-    char type_flag; // 156
-    char linked_name[100]; // 157-256
-    char magic[6]; // 257-262
-    char version[2]; // 263-264
-    char username[32]; // 265-296
-    char groupname[32]; // 297-328
-    char majorNum[8]; // 329-336
-    char minorNum[8]; // 337-344
-    char prefix[155]; // 345-499
-    char notUsed[12]; // 500-511
+	char name[100]; // 0-99
+	char mode[8]; // 100-107
+	char ownerUID[8]; // 108-115
+	char groupUID[8]; // 116-123
+	char fileSize[12]; // 124-135
+	char lastMod[12]; // 136-147
+	char checksum[8]; // 148-155
+	char type_flag; // 156
+	char linked_name[100]; // 157-256
+	char magic[6]; // 257-262
+	char version[2]; // 263-264
+	char username[32]; // 265-296
+	char groupname[32]; // 297-328
+	char majorNum[8]; // 329-336
+	char minorNum[8]; // 337-344
+	char prefix[155]; // 345-499
+	char notUsed[12]; // 500-511
 };
-#define TAR_SIZE    512
-#define TMAGIC   "ustar"        /* ustar and a null */
-#define TMAGLEN  6
-#define TVERSION "00"           /* 00 and no null */
+#define TAR_SIZE 512
+#define TMAGIC "ustar" /* ustar and a null */
+#define TMAGLEN 6
+#define TVERSION "00" /* 00 and no null */
 #define TVERSLEN 2
 #define ERROR_TAR 1
 #define NOERROR_TAR 0
 
-#define REGTYPE  '0'            /* regular file */
-#define DIRTYPE  '5'            /* directory */
-
+#define REGTYPE '0' /* regular file */
+#define DIRTYPE '5' /* directory */
 
 struct tar_file {
-    struct file file;
-    struct file_system *fs;
-    size_t len;
-    size_t offset;
-    size_t sect; 
+	struct file file;
+	struct file_system *fs;
+	size_t len;
+	size_t offset;
+	size_t sect;
 };
 /// @brief reads from the disk into tar_header
 /// @param disk the disk used with disk_read
 /// @param sect the sector to read (used for disk_read offset)
 /// @param hdr the tar_header to read into. read_tar_header is essentially used to output this.
 /// @return NOERROR_TAR or ERROR_TAR
-int read_tar_header(struct disk *disk, uint32_t sect, struct tar_header *hdr) {
-    // makes sure it reads enough bytes.
-    if(disk_read(disk, sect * TAR_SIZE, TAR_SIZE, hdr) < TAR_SIZE) {
-        return ERROR_TAR;
-    }
-    // makes sure magic and version are correct for USTar.
-    if(memcmp(hdr->magic, TMAGIC, TMAGLEN) != 0 || memcmp(hdr->version, TVERSION, TVERSLEN) != 0) {
-        return ERROR_TAR;
-    }
-    return NOERROR_TAR;
-    
+int read_tar_header(struct disk *disk, uint32_t sect, struct tar_header *hdr)
+{
+	// makes sure it reads enough bytes.
+	if (disk_read(disk, sect * TAR_SIZE, TAR_SIZE, hdr) < TAR_SIZE) {
+		return ERROR_TAR;
+	}
+	// makes sure magic and version are correct for USTar.
+	if (memcmp(hdr->magic, TMAGIC, TMAGLEN) != 0 ||
+		memcmp(hdr->version, TVERSION, TVERSLEN) != 0) {
+		return ERROR_TAR;
+	}
+	return NOERROR_TAR;
 }
 
 /// @brief reads from the file, and puts it into buffer
@@ -65,15 +64,17 @@ int read_tar_header(struct disk *disk, uint32_t sect, struct tar_header *hdr) {
 /// @param buffer the buffer that the content of the file is read into
 /// @param len length of the buffer, which caps what can be read if the file has more data.
 /// @return size of what was read.
-int tar_read(struct file *f, void *buffer, size_t len) {
-    struct tar_file *tf = (struct tar_file*) f;
-    long size = MIN((tf->len - tf->offset), len);
-    if(tf->file.f_type != F_REG || size < 1) {
-        return ERROR_TAR;
-    }
-    size = disk_read(tf->fs->fs_disk, (tf->sect+1) * TAR_SIZE + tf->offset, size, buffer);
-    tf->offset += size;
-    return size;
+int tar_read(struct file *f, void *buffer, size_t len)
+{
+	struct tar_file *tf = (struct tar_file *)f;
+	long size = MIN((tf->len - tf->offset), len);
+	if (tf->file.f_type != F_REG || size < 1) {
+		return ERROR_TAR;
+	}
+	size = disk_read(tf->fs->fs_disk, (tf->sect + 1) * TAR_SIZE + tf->offset,
+					 size, buffer);
+	tf->offset += size;
+	return size;
 }
 /// @brief used to locate files
 /// @param fs the file system being used
@@ -82,111 +83,121 @@ int tar_read(struct file *f, void *buffer, size_t len) {
 /// @param sect_return the sector to be outputted
 /// @param outHeader tar_header output for file found.
 /// @return NOERROR_TAR or ERROR_TAR
-int find_file(struct file_system *fs, const char *filepath, size_t *sect, size_t *sect_return, struct tar_header *outHeader) {
-    struct tar_header hdr;
-    size_t curr_sect;
-    if(sect == NULL) {
-        curr_sect = 0;
-    } else {
-        curr_sect = *sect;
-    }
-    while (1 == 1) {
-        // if read_tar_header errors
-        if(read_tar_header(fs->fs_disk, curr_sect, &hdr) != 0) {
-            return ERROR_TAR;
-        }
-        if(memcmp(hdr.name, filepath, strlen(filepath) + 1) != 0) {
-            // didn't find it.
-            curr_sect += ((strtoull(hdr.fileSize, NULL, 8) + TAR_SIZE - 1)/TAR_SIZE) + 1;
-            continue;
-        } else {
-            *outHeader = hdr;
-            *sect_return = curr_sect;
-            if(sect != NULL) {
-                sect += curr_sect;
-            }
-            return NOERROR_TAR;
-        }
-
-    }
-    return ERROR_TAR;
+int find_file(struct file_system *fs, const char *filepath, size_t *sect,
+			  size_t *sect_return, struct tar_header *outHeader)
+{
+	struct tar_header hdr;
+	size_t curr_sect;
+	if (sect == NULL) {
+		curr_sect = 0;
+	} else {
+		curr_sect = *sect;
+	}
+	while (1 == 1) {
+		// if read_tar_header errors
+		if (read_tar_header(fs->fs_disk, curr_sect, &hdr) != 0) {
+			return ERROR_TAR;
+		}
+		if (memcmp(hdr.name, filepath, strlen(filepath) + 1) != 0) {
+			// didn't find it.
+			curr_sect +=
+				((strtoull(hdr.fileSize, NULL, 8) + TAR_SIZE - 1) / TAR_SIZE) +
+				1;
+			continue;
+		} else {
+			*outHeader = hdr;
+			*sect_return = curr_sect;
+			if (sect != NULL) {
+				sect += curr_sect;
+			}
+			return NOERROR_TAR;
+		}
+	}
+	return ERROR_TAR;
 }
 
 // similar to find_file, but with a partition
-int find_file_redux(struct file_system *fs, const char *filepath, size_t *sect, size_t *sect_return, struct tar_header *outHeader) {
-    struct tar_header hdr;
-    size_t curr_sect;
-    if(sect == NULL) {
-        curr_sect = 0;
-    } else {
-        curr_sect = *sect;
-    }
-    while (1 == 1) {
-        if(read_tar_header(fs->fs_disk, curr_sect, &hdr) != 0) {
-            return ERROR_TAR;
-        }
-        if(memcmp(hdr.name, filepath, MIN(strlen(filepath), strlen(hdr.name))) != 0) {
-            // didn't find it.
-            
-            curr_sect += ((strtoull(hdr.fileSize, NULL, 8) + TAR_SIZE - 1)/TAR_SIZE) + 1;
-            continue;
-        } else {
-            *outHeader = hdr;
-            *sect_return = curr_sect;
-            if(sect != NULL) {
-                sect += curr_sect + ((strtoull(hdr.fileSize, NULL, 8) + TAR_SIZE - 1)/TAR_SIZE) + 1;
-            }
-            return NOERROR_TAR;
-
-        }
-
-    }
-    return ERROR_TAR; // it should never actually reach here.
+int find_file_redux(struct file_system *fs, const char *filepath, size_t *sect,
+					size_t *sect_return, struct tar_header *outHeader)
+{
+	struct tar_header hdr;
+	size_t curr_sect;
+	if (sect == NULL) {
+		curr_sect = 0;
+	} else {
+		curr_sect = *sect;
+	}
+	while (1 == 1) {
+		if (read_tar_header(fs->fs_disk, curr_sect, &hdr) != 0) {
+			return ERROR_TAR;
+		}
+		if (memcmp(hdr.name, filepath,
+				   MIN(strlen(filepath), strlen(hdr.name))) != 0) {
+			// didn't find it.
 
+			curr_sect +=
+				((strtoull(hdr.fileSize, NULL, 8) + TAR_SIZE - 1) / TAR_SIZE) +
+				1;
+			continue;
+		} else {
+			*outHeader = hdr;
+			*sect_return = curr_sect;
+			if (sect != NULL) {
+				sect += curr_sect +
+						((strtoull(hdr.fileSize, NULL, 8) + TAR_SIZE - 1) /
+						 TAR_SIZE) +
+						1;
+			}
+			return NOERROR_TAR;
+		}
+	}
+	return ERROR_TAR; // it should never actually reach here.
 }
 /// @brief closes the file
 /// @param f the file to close, and free memory from.
-void tar_close(struct file *f) {
-    kfree(f); 
+void tar_close(struct file *f)
+{
+	kfree(f);
 }
 
-/// @brief 
+/// @brief
 /// @param f the file to perform seek
 /// @param offsetAdd what to add/adjust to the offset
 /// @param theSeek what kind of seek we are doing
 /// @return the new offset, or -1 on error (we can't use 1 since that is a possible offset change).
-int tar_seek(struct file *f, long int offsetAdd, int theSeek) {
-    struct tar_file *tf = (struct tar_file*) f;
-    if(theSeek == SEEK_SET) {
-        tf->offset = offsetAdd;
-        return tf->offset;
-    } else if(theSeek == SEEK_CUR) {
-        tf->offset = tf->offset + offsetAdd;
-        return tf->offset;
-    } else if(theSeek ==SEEK_END) {
-        tf->offset = tf->len + offsetAdd;
-        return tf->offset;
-    } else {
-        return -1; // if seek has a bad value for some reason.
-    }
-
+int tar_seek(struct file *f, long int offsetAdd, int theSeek)
+{
+	struct tar_file *tf = (struct tar_file *)f;
+	if (theSeek == SEEK_SET) {
+		tf->offset = offsetAdd;
+		return tf->offset;
+	} else if (theSeek == SEEK_CUR) {
+		tf->offset = tf->offset + offsetAdd;
+		return tf->offset;
+	} else if (theSeek == SEEK_END) {
+		tf->offset = tf->len + offsetAdd;
+		return tf->offset;
+	} else {
+		return -1; // if seek has a bad value for some reason.
+	}
 }
 
-/// @brief 
+/// @brief
 /// @param f the file to write to (in theory)
 /// @param buffer the buffer to write from (in theory)
 /// @param len the length of the buffer to be written into (in theory)
 /// @return ERROR_TAR or NOERROR_TAR (in this case always ERROR_TAR).
-int tar_write(struct file *f, const void *buffer, size_t len) {
-    // tar doesn't do write lol. This is just here so there is something to send to write
-    (void)f;
-    (void)buffer;
-    (void)len;
-    return ERROR_TAR;
+int tar_write(struct file *f, const void *buffer, size_t len)
+{
+	// tar doesn't do write lol. This is just here so there is something to send to write
+	(void)f;
+	(void)buffer;
+	(void)len;
+	return ERROR_TAR;
 }
 
 /// @brief gets the directory entry for the given file
-/// @param f the file 
+/// @param f the file
 /// @param ent the directory entry is put into here
 /// @param entry where idx needs to reach
 /// @return NOERROR_TAR or ERROR_TAR
@@ -205,8 +216,8 @@ int tar_ents(struct file *f, struct dirent *ent, size_t entry)
 		return ERROR_TAR;
 
 	if (read_tar_header(tf->fs->fs_disk, sect, &dir)) {
-        return ERROR_TAR;
-    }
+		return ERROR_TAR;
+	}
 
 	while (1) {
 		if (find_file_redux(tf->fs, dir.name, &sect_off, &sect, &hdr))
@@ -232,29 +243,31 @@ int tar_ents(struct file *f, struct dirent *ent, size_t entry)
 /// @param flags in this case, just used to check whether the file is set to read only, to make sure it is correct
 /// @param out the file, ready to be acted upon, with the other functions loaded onto it.
 /// @return NOERROR_TAR or ERROR_TAR
-int tar_open(struct file_system *fs, const char *fullpath, int flags, struct file **out) {
-    struct tar_header hdr;
-    struct tar_file *newFile;
-    size_t sect_result;
-    find_file(fs, fullpath, NULL, &sect_result, &hdr);
-    if(flags != O_RDONLY) {
-        return ERROR_TAR;
-    }
-    newFile = kalloc(sizeof(struct tar_file));
+int tar_open(struct file_system *fs, const char *fullpath, int flags,
+			 struct file **out)
+{
+	struct tar_header hdr;
+	struct tar_file *newFile;
+	size_t sect_result;
+	find_file(fs, fullpath, NULL, &sect_result, &hdr);
+	if (flags != O_RDONLY) {
+		return ERROR_TAR;
+	}
+	newFile = kalloc(sizeof(struct tar_file));
 
-    newFile->file.f_type = F_REG;
-    newFile->fs = fs;
-    newFile->file.read = tar_read;
-    newFile->file.close = tar_close;
-    newFile->file.write = tar_write; // doesn't actually work;
-    newFile->file.ents = tar_ents;
-    newFile->file.seek = tar_seek;
-    newFile->offset = 0;
-    newFile->len = strtoull(hdr.fileSize, NULL, 8);
-    newFile->sect = sect_result;
+	newFile->file.f_type = F_REG;
+	newFile->fs = fs;
+	newFile->file.read = tar_read;
+	newFile->file.close = tar_close;
+	newFile->file.write = tar_write; // doesn't actually work;
+	newFile->file.ents = tar_ents;
+	newFile->file.seek = tar_seek;
+	newFile->offset = 0;
+	newFile->len = strtoull(hdr.fileSize, NULL, 8);
+	newFile->sect = sect_result;
 
-    *out = (struct file *)newFile;
-    return NOERROR_TAR;
+	*out = (struct file *)newFile;
+	return NOERROR_TAR;
 }
 
 /// @brief gets the stats for the file found at fullpath, putting them in out
@@ -262,34 +275,36 @@ int tar_open(struct file_system *fs, const char *fullpath, int flags, struct fil
 /// @param fullpath the full filepath of the file
 /// @param out the stats for the file found
 /// @return NOERROR_TAR OR ERROR_TAR
-int tar_stat(struct file_system *fs, const char *fullpath, struct stat *out) {
-    struct tar_header hdr;
-    size_t sect_result;
-    find_file(fs, fullpath, NULL, &sect_result, &hdr);
-    out->s_length = strtoull(hdr.fileSize, NULL, 8); 
-    if(hdr.type_flag == REGTYPE) {
-        out->s_type = F_REG;
-    } else if(hdr.type_flag == DIRTYPE) {
-        out->s_type = F_DIR;
-    } else {
-        // wth
-        return ERROR_TAR;
-    }
-    return NOERROR_TAR;
+int tar_stat(struct file_system *fs, const char *fullpath, struct stat *out)
+{
+	struct tar_header hdr;
+	size_t sect_result;
+	find_file(fs, fullpath, NULL, &sect_result, &hdr);
+	out->s_length = strtoull(hdr.fileSize, NULL, 8);
+	if (hdr.type_flag == REGTYPE) {
+		out->s_type = F_REG;
+	} else if (hdr.type_flag == DIRTYPE) {
+		out->s_type = F_DIR;
+	} else {
+		// wth
+		return ERROR_TAR;
+	}
+	return NOERROR_TAR;
 }
 
 /// @brief use tar for the filesystem.
 /// @param fs the file system being used, and loading tar into it.
 /// @return NOERROR_TAR or ERROR_TAR
-int tar_mount(struct file_system *fs) {
-    struct tar_header hdr;
-    // reads into hdr
-    if(read_tar_header(fs->fs_disk, 0, &hdr) == 0) {
-        fs->fs_name = "tar";
-        fs->open = tar_open;
-        fs->stat = tar_stat;
-        fs->fs_present = true;
-        return NOERROR_TAR;
-    }
-    return ERROR_TAR;
+int tar_mount(struct file_system *fs)
+{
+	struct tar_header hdr;
+	// reads into hdr
+	if (read_tar_header(fs->fs_disk, 0, &hdr) == 0) {
+		fs->fs_name = "tar";
+		fs->open = tar_open;
+		fs->stat = tar_stat;
+		fs->fs_present = true;
+		return NOERROR_TAR;
+	}
+	return ERROR_TAR;
 }
\ No newline at end of file