diff options
Diffstat (limited to 'sbin/fdisk')
-rw-r--r-- | sbin/fdisk/Makefile | 2 | ||||
-rw-r--r-- | sbin/fdisk/fdisk.c | 400 |
2 files changed, 102 insertions, 300 deletions
diff --git a/sbin/fdisk/Makefile b/sbin/fdisk/Makefile index ef55d0a..9a5fb9b 100644 --- a/sbin/fdisk/Makefile +++ b/sbin/fdisk/Makefile @@ -1,7 +1,7 @@ # $FreeBSD$ PROG= fdisk -WARNS= 0 +WARNS= 4 MAN= fdisk.8 .include <bsd.prog.mk> diff --git a/sbin/fdisk/fdisk.c b/sbin/fdisk/fdisk.c index 0af514c..d2726ae 100644 --- a/sbin/fdisk/fdisk.c +++ b/sbin/fdisk/fdisk.c @@ -61,42 +61,39 @@ static char lbuf[LBUF]; */ #define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp -#define Hex(str, ans, tmp) if (hex(str, &tmp, ans)) ans = tmp -#define String(str, ans, len) {char *z = ans; char **dflt = &z; if (string(str, dflt)) strncpy(ans, *dflt, len); } #define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs) #define MAX_SEC_SIZE 2048 /* maximum section size that is supported */ #define MIN_SEC_SIZE 512 /* the sector size to start sensing at */ -int secsize = 0; /* the sensed sector size */ +static int secsize = 0; /* the sensed sector size */ -char *disk; +static char *disk; -struct disklabel disklabel; /* disk parameters */ +static struct disklabel disklabel; /* disk parameters */ -int cyls, sectors, heads, cylsecs, disksecs; +static int cyls, sectors, heads, cylsecs, disksecs; -struct mboot -{ +struct mboot { unsigned char padding[2]; /* force the longs to be long aligned */ unsigned char *bootinst; /* boot code */ off_t bootinst_size; struct dos_partition parts[4]; }; -struct mboot mboot = {{0}, NULL, 0}; + +static struct mboot mboot; +static int fd; #define ACTIVE 0x80 #define BOOT_MAGIC 0xAA55 -int dos_cyls; -int dos_heads; -int dos_sectors; -int dos_cylsecs; +static uint dos_cyls; +static uint dos_heads; +static uint dos_sectors; +static uint dos_cylsecs; #define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0)) #define DOSCYL(c) (c & 0xff) -static int partition = -1; - #define MAX_ARGS 10 @@ -106,7 +103,6 @@ static int geom_processed = 0; static int part_processed = 0; static int active_processed = 0; - typedef struct cmd { char cmd; int n_args; @@ -116,7 +112,6 @@ typedef struct cmd { } args[MAX_ARGS]; } CMD; - static int B_flag = 0; /* replace boot code */ static int I_flag = 0; /* use entire disk for FreeBSD */ static int a_flag = 0; /* set active partition */ @@ -128,12 +123,11 @@ static int t_flag = 0; /* test only, if f_flag is given */ static char *f_flag = NULL; /* Read config info from file */ static int v_flag = 0; /* Be verbose */ -struct part_type +static struct part_type { unsigned char type; - char *name; -}part_types[] = -{ + const char *name; +} part_types[] = { {0x00, "unused"} ,{0x01, "Primary DOS with 12 bit FAT"} ,{0x02, "XENIX / filesystem"} @@ -184,7 +178,7 @@ struct part_type ,{0x78, "QNX4.x 2nd part"} ,{0x79, "QNX4.x 3rd part"} ,{0x80, "Minix until 1.4a"} - ,{0x81, "Minix since 1.4b, early Linux partition or Mitac (disk manager)"} + ,{0x81, "Minix since 1.4b, early Linux partition or Mitac disk manager"} ,{0x82, "Linux swap or Solaris x86"} ,{0x83, "Linux native"} ,{0x84, "OS/2 hidden C: drive"} @@ -224,36 +218,33 @@ static void print_part(int i); static void init_sector0(unsigned long start); static void init_boot(void); static void change_part(int i); -static void print_params(); +static void print_params(void); static void change_active(int which); -static void change_code(); -static void get_params_to_use(); +static void change_code(void); +static void get_params_to_use(void); static char *get_rootdisk(void); static void dos(struct dos_partition *partp); -static int open_disk(int u_flag); +static int open_disk(int flag); static ssize_t read_disk(off_t sector, void *buf); static ssize_t write_disk(off_t sector, void *buf); -static int get_params(); -static int read_s0(); -static int write_s0(); -static int ok(char *str); -static int decimal(char *str, int *num, int deflt); -static char *get_type(int type); +static int get_params(void); +static int read_s0(void); +static int write_s0(void); +static int ok(const char *str); +static int decimal(const char *str, int *num, int deflt); +static const char *get_type(int type); static int read_config(char *config_file); static void reset_boot(void); static int sanitize_partition(struct dos_partition *); static void usage(void); -#if 0 -static int hex(char *str, int *num, int deflt); -static int string(char *str, char **ans); -#endif - int main(int argc, char *argv[]) { struct stat sb; int c, i; + int partition = -1; + struct dos_partition *partp; while ((c = getopt(argc, argv, "BIab:f:istuv1234")) != -1) switch (c) { @@ -311,11 +302,9 @@ main(int argc, char *argv[]) disk = argv[0]; } else if (errno == ENOENT) { /* Try prepending "/dev" */ - if ((disk = malloc(strlen(argv[0]) + strlen(_PATH_DEV) + - 1)) == NULL) + asprintf(&disk, "%s%s", _PATH_DEV, argv[0]); + if (disk == NULL) errx(1, "out of memory"); - strcpy(disk, _PATH_DEV); - strcat(disk, argv[0]); } else { /* other stat error, let it fail below */ disk = argv[0]; @@ -331,11 +320,7 @@ main(int argc, char *argv[]) free(mboot.bootinst); mboot.bootinst = NULL; - if (s_flag) - { - int i; - struct dos_partition *partp; - + if (s_flag) { if (read_s0()) err(1, "read_s0"); printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads, @@ -355,10 +340,7 @@ main(int argc, char *argv[]) printf("******* Working on device %s *******\n",disk); - if (I_flag) - { - struct dos_partition *partp; - + if (I_flag) { read_s0(); reset_boot(); partp = (struct dos_partition *) (&mboot.parts[0]); @@ -374,36 +356,20 @@ main(int argc, char *argv[]) write_s0(); exit(0); } - if (f_flag) - { + if (f_flag) { if (read_s0() || i_flag) - { reset_boot(); - } - if (!read_config(f_flag)) - { exit(1); - } if (v_flag) - { print_s0(-1); - } if (!t_flag) - { write_s0(); - } - } - else - { + } else { if(u_flag) - { get_params_to_use(); - } else - { print_params(); - } if (read_s0()) init_sector0(dos_sectors); @@ -424,19 +390,15 @@ main(int argc, char *argv[]) change_code(); if (u_flag || a_flag || B_flag) { - if (!t_flag) - { + if (!t_flag) { printf("\nWe haven't changed the partition table yet. "); printf("This is your last chance.\n"); } print_s0(-1); - if (!t_flag) - { + if (!t_flag) { if (ok("Should we write new partition table?")) write_s0(); - } - else - { + } else { printf("\n-t flag specified -- partition table not written.\n"); } } @@ -457,7 +419,7 @@ usage() static void print_s0(int which) { -int i; + int i; print_params(); printf("Information from DOS bootblock is:\n"); @@ -468,7 +430,7 @@ int i; print_part(which); } -static struct dos_partition mtpart = { 0 }; +static struct dos_partition mtpart; static void print_part(int i) @@ -510,12 +472,12 @@ static void init_boot(void) { const char *fname; - int fd, n; + int fdesc, n; struct stat sb; fname = b_flag ? b_flag : "/boot/mbr"; - if ((fd = open(fname, O_RDONLY)) == -1 || - fstat(fd, &sb) == -1) + if ((fdesc = open(fname, O_RDONLY)) == -1 || + fstat(fdesc, &sb) == -1) err(1, "%s", fname); if ((mboot.bootinst_size = sb.st_size) % secsize != 0) errx(1, "%s: length must be a multiple of sector size", fname); @@ -523,8 +485,8 @@ init_boot(void) free(mboot.bootinst); if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL) errx(1, "%s: unable to allocate read buffer", fname); - if ((n = read(fd, mboot.bootinst, mboot.bootinst_size)) == -1 || - close(fd)) + if ((n = read(fdesc, mboot.bootinst, mboot.bootinst_size)) == -1 || + close(fdesc)) err(1, "%s", fname); if (n != mboot.bootinst_size) errx(1, "%s: short read", fname); @@ -534,7 +496,7 @@ init_boot(void) static void init_sector0(unsigned long start) { -struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]); + struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]); init_boot(); @@ -552,7 +514,7 @@ struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]); static void change_part(int i) { -struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i - 1; + struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i - 1; printf("The data for partition %d is:\n", i); print_part(i); @@ -606,7 +568,7 @@ struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i - 1; print_part(i); } while (!ok("Are we happy with this entry?")); } -} + } static void print_params() @@ -690,8 +652,7 @@ get_params_to_use() * Change real numbers into strange dos numbers * \***********************************************/ static void -dos(partp) - struct dos_partition *partp; +dos(struct dos_partition *partp) { int cy, sec; u_int32_t end; @@ -717,12 +678,8 @@ dos(partp) partp->dp_esect = DOSSECT(sec, cy); } -int fd; - - /* Getting device status */ - static int -open_disk(int u_flag) +open_disk(int flag) { struct stat st; @@ -735,13 +692,13 @@ open_disk(int u_flag) if ( !(st.st_mode & S_IFCHR) ) warnx("device %s is not character special", disk); if ((fd = open(disk, - a_flag || I_flag || B_flag || u_flag ? O_RDWR : O_RDONLY)) == -1) { + a_flag || I_flag || B_flag || flag ? O_RDWR : O_RDONLY)) == -1) { if(errno == ENXIO) return -2; warnx("can't open device %s", disk); return -1; } - if (get_params(0) == -1) { + if (get_params() == -1) { warnx("can't get disk parameters on %s", disk); return -1; } @@ -827,9 +784,6 @@ read_s0() static int write_s0() { -#ifdef NOT_NOW - int flag; -#endif int sector; if (iotest) { @@ -843,32 +797,18 @@ write_s0() * needed if the disklabel protected area also protects * sector 0. (e.g. empty disk) */ -#ifdef NOT_NOW - flag = 1; - if (ioctl(fd, DIOCWLABEL, &flag) < 0) - warn("ioctl DIOCWLABEL"); -#endif for(sector = 0; sector < mboot.bootinst_size / secsize; sector++) if (write_disk(sector, &mboot.bootinst[sector * secsize]) == -1) { warn("can't write fdisk partition table"); return -1; -#ifdef NOT_NOW - flag = 0; - (void) ioctl(fd, DIOCWLABEL, &flag); -#endif } -#ifdef NOT_NOW - flag = 0; - (void) ioctl(fd, DIOCWLABEL, &flag); -#endif return(0); } static int -ok(str) -char *str; +ok(const char *str) { printf("%s [n] ", str); fflush(stdout); @@ -885,10 +825,10 @@ char *str; } static int -decimal(char *str, int *num, int deflt) +decimal(const char *str, int *num, int deflt) { -int acc = 0, c; -char *cp; + int acc = 0, c; + char *cp; while (1) { printf("Supply a decimal value for \"%s\" [%d] ", str, deflt); @@ -922,79 +862,7 @@ char *cp; } -#if 0 -static int -hex(char *str, int *num, int deflt) -{ -int acc = 0, c; -char *cp; - - while (1) { - printf("Supply a hex value for \"%s\" [%x] ", str, deflt); - fgets(lbuf, LBUF, stdin); - lbuf[strlen(lbuf)-1] = 0; - - if (!*lbuf) - return 0; - - cp = lbuf; - while ((c = *cp) && (c == ' ' || c == '\t')) cp++; - if (!c) - return 0; - while ((c = *cp++)) { - if (c <= '9' && c >= '0') - acc = (acc << 4) + c - '0'; - else if (c <= 'f' && c >= 'a') - acc = (acc << 4) + c - 'a' + 10; - else if (c <= 'F' && c >= 'A') - acc = (acc << 4) + c - 'A' + 10; - else - break; - } - if (c == ' ' || c == '\t') - while ((c = *cp) && (c == ' ' || c == '\t')) cp++; - if (!c) { - *num = acc; - return 1; - } else - printf("%s is an invalid hex number. Try again.\n", - lbuf); - } - -} - -static int -string(char *str, char **ans) -{ -int c; -char *cp = lbuf; - - while (1) { - printf("Supply a string value for \"%s\" [%s] ", str, *ans); - fgets(lbuf, LBUF, stdin); - lbuf[strlen(lbuf)-1] = 0; - - if (!*lbuf) - return 0; - - while ((c = *cp) && (c == ' ' || c == '\t')) cp++; - if (c == '"') { - c = *++cp; - *ans = cp; - while ((c = *cp) && c != '"') cp++; - } else { - *ans = cp; - while ((c = *cp) && c != ' ' && c != '\t') cp++; - } - - if (c) - *cp = 0; - return 1; - } -} -#endif - -static char * +static const char * get_type(int type) { int numentries = (sizeof(part_types)/sizeof(struct part_type)); @@ -1002,12 +870,9 @@ get_type(int type) struct part_type *ptr = part_types; - while(counter < numentries) - { + while(counter < numentries) { if(ptr->type == type) - { return(ptr->name); - } ptr++; counter++; } @@ -1016,49 +881,34 @@ get_type(int type) static void -parse_config_line(line, command) - char *line; - CMD *command; +parse_config_line(char *line, CMD *command) { char *cp, *end; cp = line; - while (1) /* dirty trick used to insure one exit point for this - function */ - { + while (1) { memset(command, 0, sizeof(*command)); while (isspace(*cp)) ++cp; if (*cp == '\0' || *cp == '#') - { break; - } command->cmd = *cp++; /* * Parse args */ - while (1) - { + while (1) { while (isspace(*cp)) ++cp; if (*cp == '#') - { break; /* found comment */ - } if (isalpha(*cp)) - { command->args[command->n_args].argtype = *cp++; - } if (!isdigit(*cp)) - { break; /* assume end of line */ - } end = NULL; command->args[command->n_args].arg_val = strtol(cp, &end, 0); if (cp == end) - { break; /* couldn't parse number */ - } cp = end; command->n_args++; } @@ -1068,16 +918,13 @@ parse_config_line(line, command) static int -process_geometry(command) - CMD *command; +process_geometry(CMD *command) { int status = 1, i; - while (1) - { + while (1) { geom_processed = 1; - if (part_processed) - { + if (part_processed) { warnx( "ERROR line %d: the geometry specification line must occur before\n\ all partition specifications", @@ -1085,20 +932,17 @@ process_geometry(command) status = 0; break; } - if (command->n_args != 3) - { + if (command->n_args != 3) { warnx("ERROR line %d: incorrect number of geometry args", current_line_number); status = 0; break; } - dos_cyls = -1; - dos_heads = -1; - dos_sectors = -1; - for (i = 0; i < 3; ++i) - { - switch (command->args[i].argtype) - { + dos_cyls = 0; + dos_heads = 0; + dos_sectors = 0; + for (i = 0; i < 3; ++i) { + switch (command->args[i].argtype) { case 'c': dos_cyls = command->args[i].arg_val; break; @@ -1118,23 +962,19 @@ process_geometry(command) } } if (status == 0) - { break; - } dos_cylsecs = dos_heads * dos_sectors; /* * Do sanity checks on parameter values */ - if (dos_cyls < 0) - { + if (dos_cyls == 0) { warnx("ERROR line %d: number of cylinders not specified", current_line_number); status = 0; } - if (dos_cyls == 0 || dos_cyls > 1024) - { + if (dos_cyls > 1024) { warnx( "WARNING line %d: number of cylinders (%d) may be out-of-range\n\ (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\ @@ -1142,27 +982,21 @@ process_geometry(command) current_line_number, dos_cyls); } - if (dos_heads < 0) - { + if (dos_heads == 0) { warnx("ERROR line %d: number of heads not specified", current_line_number); status = 0; - } - else if (dos_heads < 1 || dos_heads > 256) - { + } else if (dos_heads > 256) { warnx("ERROR line %d: number of heads must be within (1-256)", current_line_number); status = 0; } - if (dos_sectors < 0) - { + if (dos_sectors == 0) { warnx("ERROR line %d: number of sectors not specified", current_line_number); status = 0; - } - else if (dos_sectors < 1 || dos_sectors > 63) - { + } else if (dos_sectors > 63) { warnx("ERROR line %d: number of sectors must be within (1-63)", current_line_number); status = 0; @@ -1175,26 +1009,22 @@ process_geometry(command) static int -process_partition(command) - CMD *command; +process_partition(CMD *command) { int status = 0, partition; u_int32_t prev_head_boundary, prev_cyl_boundary; u_int32_t adj_size, max_end; struct dos_partition *partp; - while (1) - { + while (1) { part_processed = 1; - if (command->n_args != 4) - { + if (command->n_args != 4) { warnx("ERROR line %d: incorrect number of partition args", current_line_number); break; } partition = command->args[0].arg_val; - if (partition < 1 || partition > 4) - { + if (partition < 1 || partition > 4) { warnx("ERROR line %d: invalid partition number %d", current_line_number, partition); break; @@ -1206,8 +1036,7 @@ process_partition(command) partp->dp_size = command->args[3].arg_val; max_end = partp->dp_start + partp->dp_size; - if (partp->dp_typ == 0) - { + if (partp->dp_typ == 0) { /* * Get out, the partition is marked as unused. */ @@ -1222,12 +1051,10 @@ process_partition(command) /* * Adjust start upwards, if necessary, to fall on an head boundary. */ - if (partp->dp_start % dos_sectors != 0) - { + if (partp->dp_start % dos_sectors != 0) { prev_head_boundary = partp->dp_start / dos_sectors * dos_sectors; if (max_end < dos_sectors || - prev_head_boundary > max_end - dos_sectors) - { + prev_head_boundary > max_end - dos_sectors) { /* * Can't go past end of partition */ @@ -1253,23 +1080,20 @@ process_partition(command) ((partp->dp_start + partp->dp_size) / dos_cylsecs) * dos_cylsecs; if (prev_cyl_boundary > partp->dp_start) adj_size = prev_cyl_boundary - partp->dp_start; - else - { + else { warnx( "ERROR: could not adjust partition to start on a head boundary\n\ and end on a cylinder boundary."); return (0); } - if (adj_size != partp->dp_size) - { + if (adj_size != partp->dp_size) { warnx( "WARNING: adjusting size of partition %d from %u to %u\n\ to end on a cylinder boundary", partition, (u_int)partp->dp_size, (u_int)adj_size); partp->dp_size = adj_size; } - if (partp->dp_size == 0) - { + if (partp->dp_size == 0) { warnx("ERROR line %d: size of partition %d is zero", current_line_number, partition); break; @@ -1284,25 +1108,21 @@ process_partition(command) static int -process_active(command) - CMD *command; +process_active(CMD *command) { int status = 0, partition, i; struct dos_partition *partp; - while (1) - { + while (1) { active_processed = 1; - if (command->n_args != 1) - { + if (command->n_args != 1) { warnx("ERROR line %d: incorrect number of active args", current_line_number); status = 0; break; } partition = command->args[0].arg_val; - if (partition < 1 || partition > 4) - { + if (partition < 1 || partition > 4) { warnx("ERROR line %d: invalid partition number %d", current_line_number, partition); break; @@ -1323,17 +1143,14 @@ process_active(command) static int -process_line(line) - char *line; +process_line(char *line) { CMD command; int status = 1; - while (1) - { + while (1) { parse_config_line(line, &command); - switch (command.cmd) - { + switch (command.cmd) { case 0: /* * Comment or blank line @@ -1362,49 +1179,36 @@ process_line(line) static int -read_config(config_file) - char *config_file; +read_config(char *config_file) { FILE *fp = NULL; int status = 1; char buf[1010]; - while (1) /* dirty trick used to insure one exit point for this - function */ - { - if (strcmp(config_file, "-") != 0) - { + while (1) { + if (strcmp(config_file, "-") != 0) { /* * We're not reading from stdin */ - if ((fp = fopen(config_file, "r")) == NULL) - { + if ((fp = fopen(config_file, "r")) == NULL) { status = 0; break; } - } - else - { + } else { fp = stdin; } current_line_number = 0; - while (!feof(fp)) - { + while (!feof(fp)) { if (fgets(buf, sizeof(buf), fp) == NULL) - { break; - } ++current_line_number; status = process_line(buf); if (status == 0) - { break; } - } break; } - if (fp) - { + if (fp) { /* * It doesn't matter if we're reading from stdin, as we've reached EOF */ @@ -1421,16 +1225,14 @@ reset_boot(void) struct dos_partition *partp; init_boot(); - for (i = 0; i < 4; ++i) - { + for (i = 0; i < 4; ++i) { partp = ((struct dos_partition *) &mboot.parts) + i; bzero((char *)partp, sizeof (struct dos_partition)); } } static int -sanitize_partition(partp) - struct dos_partition *partp; +sanitize_partition(struct dos_partition *partp) { u_int32_t prev_head_boundary, prev_cyl_boundary; u_int32_t max_end, size, start; |