leftover of e2fsck surgery

1 files changed, 36 insertions, 82 deletions

diff --git a/e2fsprogs/fsck.c b/e2fsprogs/fsck.c
index d59206ca2..396174ef5 100644
--- a/e2fsprogs/fsck.c
+++ b/e2fsprogs/fsck.c
@@ -27,7 +27,6 @@
  */
 
 #include "busybox.h"
-/*#include "e2fs_lib.h"*/
 
 #define EXIT_OK          0
 #define EXIT_NONDESTRUCT 1
@@ -41,9 +40,6 @@
 #define DEFAULT_FSTYPE  "ext2"
 #endif
 
-#define MAX_DEVICES 32
-#define MAX_ARGS 32
-
 /*
  * Internal structure for mount tabel entries.
  */
@@ -76,7 +72,7 @@ struct fsck_instance {
         struct fsck_instance *next;
 };
 
-static const char * const ignored_types[] = {
+static const char *const ignored_types[] = {
         "ignore",
         "iso9660",
         "nfs",
@@ -88,7 +84,8 @@ static const char * const ignored_types[] = {
         NULL
 };
 
-static const char * const really_wanted[] = {
+#if 0
+static const char *const really_wanted[] = {
         "minix",
         "ext2",
         "ext3",
@@ -98,16 +95,15 @@ static const char * const really_wanted[] = {
         "xfs",
         NULL
 };
+#endif
 
 #define BASE_MD "/dev/md"
 
-/*
- * Global variables for options
- */
+static volatile int cancel_requested;
+
 static char **devices;
 static char **args;
 static int num_devices, num_args;
-
 static int verbose;
 static int doall;
 static int noexecute;
@@ -121,13 +117,10 @@ static int progress_fd;
 static int force_all_parallel;
 static int num_running;
 static int max_running;
-static volatile int cancel_requested;
-static int kill_sent;
 static char *fstype;
-static struct fs_info *filesys_info, *filesys_last;
+static struct fs_info *filesys_info;
+static struct fs_info *filesys_last;
 static struct fsck_instance *instance_list;
-/*static char *fsck_path;*/
-/*static blkid_cache cache;*/
 
 #define FS_TYPE_FLAG_NORMAL 0
 #define FS_TYPE_FLAG_OPT    1
@@ -439,11 +432,10 @@ static void load_fs_info(const char *filename)
         fclose(f);
 
         if (old_fstab) {
-                fputs("\007\007\007"
-                "WARNING: Your /etc/fstab does not contain the fsck passno\n"
-                "       field.  I will kludge around things for you, but you\n"
-                "       should fix your /etc/fstab file as soon as you can.\n\n", stderr);
-
+                fputs("\007"
+"WARNING: Your /etc/fstab does not contain the fsck passno field.\n"
+"I will kludge around things for you, but you should fix\n"
+"your /etc/fstab file as soon as you can.\n\n", stderr);
                 for (fs = filesys_info; fs; fs = fs->next) {
                         fs->passno = 1;
                 }
@@ -455,10 +447,6 @@ static struct fs_info *lookup(char *filesys)
 {
         struct fs_info *fs;
 
-        /* No filesys name given. */
-        if (filesys == NULL)
-                return NULL;
-
         for (fs = filesys_info; fs; fs = fs->next) {
                 if (strcmp(filesys, fs->device) == 0
                  || (fs->mountpt && strcmp(filesys, fs->mountpt) == 0)
@@ -469,29 +457,6 @@ static struct fs_info *lookup(char *filesys)
         return fs;
 }
 
-#if 0
-/* Find fsck program for a given fs type. */
-static char *find_fsck(char *type)
-{
-        char *s;
-        const char *tpl;
-        char *p = xstrdup(fsck_path);
-        struct stat st;
-
-        /* Are we looking for a program or just a type? */
-        tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s");
-
-        for (s = strtok(p, ":"); s; s = strtok(NULL, ":")) {
-                s = xasprintf(tpl, s, type);
-                if (stat(s, &st) == 0)
-                        break;
-                free(s);
-        }
-        free(p);
-        return s;
-}
-#endif
-
 static int progress_active(void)
 {
         struct fsck_instance *inst;
@@ -588,18 +553,21 @@ static int execute(const char *type, const char *device, const char *mntpt,
 /*
  * Send a signal to all outstanding fsck child processes
  */
-static int kill_all(int signum)
+static void kill_all_if_cancel_requested(void)
 {
+        static int kill_sent;
+
         struct fsck_instance *inst;
-        int     n = 0;
+
+        if (!cancel_requested || kill_sent)
+                return;
 
         for (inst = instance_list; inst; inst = inst->next) {
                 if (inst->flags & FLAG_DONE)
                         continue;
-                kill(inst->pid, signum);
-                n++;
+                kill(inst->pid, SIGTERM);
         }
-        return n;
+        kill_sent = 1;
 }
 
 /*
@@ -637,14 +605,11 @@ static struct fsck_instance *wait_one(int flags)
 
         do {
                 pid = waitpid(-1, &status, flags);
-                if (cancel_requested && !kill_sent) {
-                        kill_all(SIGTERM);
-                        kill_sent++;
-                }
-                if ((pid == 0) && (flags & WNOHANG))
+                kill_all_if_cancel_requested();
+                if (pid == 0 && (flags & WNOHANG))
                         return NULL;
                 if (pid < 0) {
-                        if ((errno == EINTR) || (errno == EAGAIN))
+                        if (errno == EINTR || errno == EAGAIN)
                                 continue;
                         if (errno == ECHILD) {
                                 bb_error_msg("wait: no more child process?!?");
@@ -704,7 +669,7 @@ static struct fsck_instance *wait_one(int flags)
                         break;
                 }
         }
-ret_inst:
+ ret_inst:
         if (prev)
                 prev->next = inst->next;
         else
@@ -758,16 +723,16 @@ static void fsck_device(struct fs_info *fs, int interactive)
 
         interpret_type(fs);
 
+        type = DEFAULT_FSTYPE;
         if (strcmp(fs->type, "auto") != 0)
                 type = fs->type;
         else if (fstype
-         && strncmp(fstype, "no", 2)
-         && strncmp(fstype, "opts=", 5) && strncmp(fstype, "loop", 4)
+         && (fstype[0] != 'n' || fstype[1] != 'o') /* != "no" */
+         && strncmp(fstype, "opts=", 5) != 0
+         && strncmp(fstype, "loop", 4) != 0
          && !strchr(fstype, ',')
         )
                 type = fstype;
-        else
-                type = DEFAULT_FSTYPE;
 
         num_running++;
         retval = execute(type, fs->device, fs->mountpt, interactive);
@@ -1078,17 +1043,14 @@ static int check_all(void)
                 } else
                         not_done_yet++;
         }
-        if (cancel_requested && !kill_sent) {
-                kill_all(SIGTERM);
-                kill_sent++;
-        }
+        kill_all_if_cancel_requested();
         status |= wait_many(FLAG_WAIT_ATLEAST_ONE);
         return status;
 }
 
 static void signal_cancel(int sig ATTRIBUTE_UNUSED)
 {
-        cancel_requested++;
+        cancel_requested = 1;
 }
 
 static int string_to_int(const char *s)
@@ -1126,9 +1088,6 @@ static void parse_args(int argc, char *argv[])
         for (i = 1; i < argc; i++) {
                 arg = argv[i];
                 if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) {
-                        if (num_devices >= MAX_DEVICES) {
-                                bb_error_msg_and_die("too many devices");
-                        }
 #if 0
                         char *dev;
                         dev = blkid_get_devname(cache, arg, NULL);
@@ -1138,8 +1097,8 @@ static void parse_args(int argc, char *argv[])
                                  * /proc/partitions isn't found.
                                  */
                                 if (access("/proc/partitions", R_OK) < 0) {
-                                        bb_perror_msg_and_die("cannot open /proc/partitions "
-                                                        "(is /proc mounted?)");
+                                        bb_perror_msg_and_die(
+"cannot open /proc/partitions (is /proc mounted?)");
                                 }
                                 /*
                                  * Check to see if this is because
@@ -1147,10 +1106,10 @@ static void parse_args(int argc, char *argv[])
                                  */
                                 if (geteuid())
                                         bb_error_msg_and_die(
-                "must be root to scan for matching filesystems: %s\n", arg);
+"must be root to scan for matching filesystems: %s\n", arg);
                                 else
                                         bb_error_msg_and_die(
-                "cannot find matching filesystem: %s", arg);
+"cannot find matching filesystem: %s", arg);
                         }
                         devices = xrealloc(devices, (num_devices+1) * sizeof(devices[0]));
                         devices[num_devices++] = dev ? dev : xstrdup(arg);
@@ -1271,8 +1230,6 @@ int fsck_main(int argc, char *argv[])
                 fstab = "/etc/fstab";
         load_fs_info(fstab);
 
-        /*fsck_path = e2fs_set_sbin_path();*/
-
         if (num_devices == 1 || serialize)
                 interactive = 1;
 
@@ -1286,12 +1243,9 @@ int fsck_main(int argc, char *argv[])
                 return check_all();
         }
 
-        for (i = 0 ; i < num_devices; i++) {
+        for (i = 0; i < num_devices; i++) {
                 if (cancel_requested) {
-                        if (!kill_sent) {
-                                kill_all(SIGTERM);
-                                kill_sent++;
-                        }
+                        kill_all_if_cancel_requested();
                         break;
                 }
                 fs = lookup(devices[i]);