Some formatting updates (ran the code through indent)

 -Erik

1 files changed, 100 insertions, 97 deletions

diff --git a/mkswap.c b/mkswap.c
index 601188f..130d241 100644
--- a/mkswap.c
+++ b/mkswap.c
@@ -1,3 +1,4 @@
+/* vi: set sw=4 ts=4: */
 /*
  * mkswap.c - set up a linux swap device
  *
@@ -40,20 +41,21 @@
 #include <string.h>
 #include <fcntl.h>
 #include <stdlib.h>
-#include <sys/ioctl.h>		/* for _IO */
+#include <sys/ioctl.h>			/* for _IO */
 #include <sys/utsname.h>
 #include <sys/stat.h>
-#include <asm/page.h>		/* for PAGE_SIZE and PAGE_SHIFT */
+#include <asm/page.h>			/* for PAGE_SIZE and PAGE_SHIFT */
 				/* we also get PAGE_SIZE via getpagesize() */
 
 
-static const char mkswap_usage[] = "mkswap [-c] [-v0|-v1] device [block-count]\n\n"
-"Prepare a disk partition to be used as a swap partition.\n\n"
-"Options:\n"
-"\t-c\t\tCheck for read-ability.\n"
-"\t-v0\t\tMake version 0 swap [max 128 Megs].\n"
-"\t-v1\t\tMake version 1 swap [big!] (default for kernels > 2.1.117).\n"
-"\tblock-count\tNumber of block to use (default is entire partition).\n";
+static const char mkswap_usage[] =
+	"mkswap [-c] [-v0|-v1] device [block-count]\n\n"
+	"Prepare a disk partition to be used as a swap partition.\n\n"
+	"Options:\n" "\t-c\t\tCheck for read-ability.\n"
+	"\t-v0\t\tMake version 0 swap [max 128 Megs].\n"
+	"\t-v1\t\tMake version 1 swap [big!] (default for kernels > 2.1.117).\n"
+
+	"\tblock-count\tNumber of block to use (default is entire partition).\n";
 
 
 #ifndef _IO
@@ -64,8 +66,8 @@ static const char mkswap_usage[] = "mkswap [-c] [-v0|-v1] device [block-count]\n
 #define BLKGETSIZE _IO(0x12,96)
 #endif
 
-static char * program_name = "mkswap";
-static char * device_name = NULL;
+static char *program_name = "mkswap";
+static char *device_name = NULL;
 static int DEV = -1;
 static long PAGES = 0;
 static int check = 0;
@@ -74,8 +76,8 @@ static int version = -1;
 
 #define MAKE_VERSION(p,q,r)	(65536*(p) + 256*(q) + (r))
 
-static int
-linux_version_code(void) {
+static int linux_version_code(void)
+{
 	struct utsname my_utsname;
 	int p, q, r;
 
@@ -83,7 +85,7 @@ linux_version_code(void) {
 		p = atoi(strtok(my_utsname.release, "."));
 		q = atoi(strtok(NULL, "."));
 		r = atoi(strtok(NULL, "."));
-		return MAKE_VERSION(p,q,r);
+		return MAKE_VERSION(p, q, r);
 	}
 	return 0;
 }
@@ -98,7 +100,7 @@ static int pagesize;
 static int *signature_page;
 
 struct swap_header_v1 {
-        char         bootbits[1024];    /* Space for disklabel etc. */
+	char bootbits[1024];		/* Space for disklabel etc. */
 	unsigned int version;
 	unsigned int last_page;
 	unsigned int nr_badpages;
@@ -106,8 +108,8 @@ struct swap_header_v1 {
 	unsigned int badpages[1];
 } *p;
 
-static void
-init_signature_page() {
+static void init_signature_page()
+{
 	pagesize = getpagesize();
 
 #ifdef PAGE_SIZE
@@ -115,15 +117,15 @@ init_signature_page() {
 		fprintf(stderr, "Assuming pages of size %d\n", pagesize);
 #endif
 	signature_page = (int *) malloc(pagesize);
-	memset(signature_page,0,pagesize);
+	memset(signature_page, 0, pagesize);
 	p = (struct swap_header_v1 *) signature_page;
 }
 
-static void
-write_signature(char *sig) {
+static void write_signature(char *sig)
+{
 	char *sp = (char *) signature_page;
 
-	strncpy(sp+pagesize-10, sig, 10);
+	strncpy(sp + pagesize - 10, sig, 10);
 }
 
 #define V0_MAX_PAGES	(8 * (pagesize - 10))
@@ -172,42 +174,46 @@ It is roughly 2GB on i386, PPC, m68k, ARM, 1GB on sparc, 512MB on mips,
 
 #define MAX_BADPAGES	((pagesize-1024-128*sizeof(int)-10)/sizeof(int))
 
-static void bit_set (unsigned int *addr, unsigned int nr)
+static void bit_set(unsigned int *addr, unsigned int nr)
 {
 	unsigned int r, m;
 
 	addr += nr / (8 * sizeof(int));
+
 	r = *addr;
 	m = 1 << (nr & (8 * sizeof(int) - 1));
+
 	*addr = r | m;
 }
 
-static int bit_test_and_clear (unsigned int *addr, unsigned int nr)
+static int bit_test_and_clear(unsigned int *addr, unsigned int nr)
 {
 	unsigned int r, m;
 
 	addr += nr / (8 * sizeof(int));
+
 	r = *addr;
 	m = 1 << (nr & (8 * sizeof(int) - 1));
+
 	*addr = r & ~m;
 	return (r & m) != 0;
 }
 
 
-void
-die(const char *str) {
+void die(const char *str)
+{
 	fprintf(stderr, "%s: %s\n", program_name, str);
-	exit( FALSE);
+	exit(FALSE);
 }
 
-void
-page_ok(int page) {
-	if (version==0)
+void page_ok(int page)
+{
+	if (version == 0)
 		bit_set(signature_page, page);
 }
 
-void
-page_bad(int page) {
+void page_bad(int page)
+{
 	if (version == 0)
 		bit_test_and_clear(signature_page, page);
 	else {
@@ -218,8 +224,8 @@ page_bad(int page) {
 	badpages++;
 }
 
-void
-check_blocks(void) {
+void check_blocks(void)
+{
 	unsigned int current_page;
 	int do_seek = 1;
 	char *buffer;
@@ -233,8 +239,8 @@ check_blocks(void) {
 			page_ok(current_page++);
 			continue;
 		}
-		if (do_seek && lseek(DEV,current_page*pagesize,SEEK_SET) !=
-		    current_page*pagesize)
+		if (do_seek && lseek(DEV, current_page * pagesize, SEEK_SET) !=
+			current_page * pagesize)
 			die("seek failed in check_blocks");
 		if ((do_seek = (pagesize != read(DEV, buffer, pagesize)))) {
 			page_bad(current_page++);
@@ -248,30 +254,28 @@ check_blocks(void) {
 		printf("%d bad pages\n", badpages);
 }
 
-static long valid_offset (int fd, int offset)
+static long valid_offset(int fd, int offset)
 {
 	char ch;
 
-	if (lseek (fd, offset, 0) < 0)
+	if (lseek(fd, offset, 0) < 0)
 		return 0;
-	if (read (fd, &ch, 1) < 1)
+	if (read(fd, &ch, 1) < 1)
 		return 0;
 	return 1;
 }
 
-static int
-find_size (int fd)
+static int find_size(int fd)
 {
 	unsigned int high, low;
 
 	low = 0;
-	for (high = 1; high > 0 && valid_offset (fd, high); high *= 2)
+	for (high = 1; high > 0 && valid_offset(fd, high); high *= 2)
 		low = high;
-	while (low < high - 1)
-	{
+	while (low < high - 1) {
 		const int mid = (low + high) / 2;
 
-		if (valid_offset (fd, mid))
+		if (valid_offset(fd, mid))
 			low = mid;
 		else
 			high = mid;
@@ -280,11 +284,10 @@ find_size (int fd)
 }
 
 /* return size in pages, to avoid integer overflow */
-static long
-get_size(const char  *file)
+static long get_size(const char *file)
 {
-	int	fd;
-	long	size;
+	int fd;
+	long size;
 
 	fd = open(file, O_RDONLY);
 	if (fd < 0) {
@@ -292,7 +295,8 @@ get_size(const char  *file)
 		exit(1);
 	}
 	if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
-		int sectors_per_page = pagesize/512;
+		int sectors_per_page = pagesize / 512;
+
 		size /= sectors_per_page;
 	} else {
 		size = find_size(fd) / pagesize;
@@ -301,9 +305,9 @@ get_size(const char  *file)
 	return size;
 }
 
-int mkswap_main(int argc, char ** argv)
+int mkswap_main(int argc, char **argv)
 {
-	char * tmp;
+	char *tmp;
 	struct stat statbuf;
 	int sz;
 	int maxpages;
@@ -314,56 +318,56 @@ int mkswap_main(int argc, char ** argv)
 	if (argc && *argv)
 		program_name = *argv;
 
-	init_signature_page();	/* get pagesize */
+	init_signature_page();		/* get pagesize */
 
 	while (argc-- > 1) {
 		argv++;
 		if (argv[0][0] != '-') {
 			if (device_name) {
-				int blocks_per_page = pagesize/1024;
-				PAGES = strtol(argv[0],&tmp,0)/blocks_per_page;
+				int blocks_per_page = pagesize / 1024;
+
+				PAGES = strtol(argv[0], &tmp, 0) / blocks_per_page;
 				if (*tmp)
-					usage( mkswap_usage);
+					usage(mkswap_usage);
 			} else
 				device_name = argv[0];
 		} else {
 			switch (argv[0][1]) {
-				case 'c':
-					check=1;
-					break;
-				case 'f':
-					force=1;
-					break;
-				case 'v':
-					version=atoi(argv[0]+2);
-					break;
-				default:
-					usage( mkswap_usage);
+			case 'c':
+				check = 1;
+				break;
+			case 'f':
+				force = 1;
+				break;
+			case 'v':
+				version = atoi(argv[0] + 2);
+				break;
+			default:
+				usage(mkswap_usage);
 			}
 		}
 	}
 	if (!device_name) {
 		fprintf(stderr,
-			"%s: error: Nowhere to set up swap on?\n",
-			program_name);
-		usage( mkswap_usage);
+				"%s: error: Nowhere to set up swap on?\n", program_name);
+		usage(mkswap_usage);
 	}
 	sz = get_size(device_name);
 	if (!PAGES) {
 		PAGES = sz;
 	} else if (PAGES > sz && !force) {
 		fprintf(stderr,
-			"%s: error: "
-			  "size %ld is larger than device size %d\n",
-			program_name,
-			PAGES*(pagesize/1024), sz*(pagesize/1024));
-		exit( FALSE);
+				"%s: error: "
+				"size %ld is larger than device size %d\n",
+				program_name,
+				PAGES * (pagesize / 1024), sz * (pagesize / 1024));
+		exit(FALSE);
 	}
 
 	if (version == -1) {
 		if (PAGES <= V0_MAX_PAGES)
 			version = 0;
-		else if (linux_version_code() < MAKE_VERSION(2,1,117))
+		else if (linux_version_code() < MAKE_VERSION(2, 1, 117))
 			version = 0;
 		else if (pagesize < 2048)
 			version = 0;
@@ -372,21 +376,21 @@ int mkswap_main(int argc, char ** argv)
 	}
 	if (version != 0 && version != 1) {
 		fprintf(stderr, "%s: error: unknown version %d\n",
-			program_name, version);
-		usage( mkswap_usage);
+				program_name, version);
+		usage(mkswap_usage);
 	}
 	if (PAGES < 10) {
 		fprintf(stderr,
-			"%s: error: swap area needs to be at least %ldkB\n",
-			program_name, (long)(10 * pagesize / 1024));
-		usage( mkswap_usage);
+				"%s: error: swap area needs to be at least %ldkB\n",
+				program_name, (long) (10 * pagesize / 1024));
+		usage(mkswap_usage);
 	}
 #if 0
 	maxpages = ((version == 0) ? V0_MAX_PAGES : V1_MAX_PAGES);
 #else
 	if (!version)
 		maxpages = V0_MAX_PAGES;
-	else if (linux_version_code() >= MAKE_VERSION(2,2,1))
+	else if (linux_version_code() >= MAKE_VERSION(2, 2, 1))
 		maxpages = V1_MAX_PAGES;
 	else {
 		maxpages = V1_OLD_MAX_PAGES;
@@ -397,29 +401,29 @@ int mkswap_main(int argc, char ** argv)
 	if (PAGES > maxpages) {
 		PAGES = maxpages;
 		fprintf(stderr, "%s: warning: truncating swap area to %ldkB\n",
-			program_name, PAGES * pagesize / 1024);
+				program_name, PAGES * pagesize / 1024);
 	}
 
-	DEV = open(device_name,O_RDWR);
+	DEV = open(device_name, O_RDWR);
 	if (DEV < 0 || fstat(DEV, &statbuf) < 0) {
 		perror(device_name);
-		exit( FALSE);
+		exit(FALSE);
 	}
 	if (!S_ISBLK(statbuf.st_mode))
-		check=0;
+		check = 0;
 	else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
 		die("Will not try to make swapdevice on '%s'");
 
 #ifdef __sparc__
 	if (!force && version == 0) {
 		/* Don't overwrite partition table unless forced */
-		unsigned char *buffer = (unsigned char *)signature_page;
+		unsigned char *buffer = (unsigned char *) signature_page;
 		unsigned short *q, sum;
 
 		if (read(DEV, buffer, 512) != 512)
 			die("fatal: first page unreadable");
 		if (buffer[508] == 0xDA && buffer[509] == 0xBE) {
-			q = (unsigned short *)(buffer + 510);
+			q = (unsigned short *) (buffer + 510);
 			for (sum = 0; q >= (unsigned short *) buffer;)
 				sum ^= *q--;
 			if (!sum) {
@@ -427,9 +431,8 @@ int mkswap_main(int argc, char ** argv)
 %s: Device '%s' contains a valid Sun disklabel.\n\
 This probably means creating v0 swap would destroy your partition table\n\
 No swap created. If you really want to create swap v0 on that device, use\n\
-the -f option to force it.\n",
-					program_name, device_name);
-				exit( FALSE);
+the -f option to force it.\n", program_name, device_name);
+				exit(FALSE);
 			}
 		}
 	}
@@ -437,11 +440,11 @@ the -f option to force it.\n",
 
 	if (version == 0 || check)
 		check_blocks();
-	if (version == 0 && !bit_test_and_clear(signature_page,0))
+	if (version == 0 && !bit_test_and_clear(signature_page, 0))
 		die("fatal: first page unreadable");
 	if (version == 1) {
 		p->version = version;
-		p->last_page = PAGES-1;
+		p->last_page = PAGES - 1;
 		p->nr_badpages = badpages;
 	}
 
@@ -449,14 +452,14 @@ the -f option to force it.\n",
 	if (goodpages <= 0)
 		die("Unable to set up swap-space: unreadable");
 	printf("Setting up swapspace version %d, size = %ld bytes\n",
-		version, (long)(goodpages*pagesize));
+		   version, (long) (goodpages * pagesize));
 	write_signature((version == 0) ? "SWAP-SPACE" : "SWAPSPACE2");
 
 	offset = ((version == 0) ? 0 : 1024);
 	if (lseek(DEV, offset, SEEK_SET) != offset)
 		die("unable to rewind swap-device");
-	if (write(DEV,(char*)signature_page+offset, pagesize-offset)
-	    != pagesize-offset)
+	if (write(DEV, (char *) signature_page + offset, pagesize - offset)
+		!= pagesize - offset)
 		die("unable to write signature page");
 
 	/*
@@ -464,6 +467,6 @@ the -f option to force it.\n",
 	 * is not actually on disk. (This is a kernel bug.)
 	 */
 	if (fsync(DEV))
-		 die("fsync failed");
-	exit ( TRUE);
+		die("fsync failed");
+	exit(TRUE);
 }