From 29d2e362dedf42d60ffebf6756144fb5449e753a Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Sat, 6 Nov 1999 06:07:27 +0000 Subject: [PATCH] Fixed ln, df, and removed redundant stuff from mtab. --- Changelog | 7 ++++++ coreutils/df.c | 54 ++++++++---------------------------------- coreutils/ln.c | 33 +++++++++++--------------- df.c | 54 ++++++++---------------------------------- internal.h | 10 +++++++- ln.c | 33 +++++++++++--------------- mount.c | 5 ++-- mtab.c | 42 --------------------------------- util-linux/mount.c | 5 ++-- utility.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++ 10 files changed, 127 insertions(+), 175 deletions(-) diff --git a/Changelog b/Changelog index 8a22e49bf..3923cf828 100644 --- a/Changelog +++ b/Changelog @@ -1,5 +1,12 @@ 0.33 * Fixed a bug where init could hang instead of rebooting. + * Removed some debugging noise from init.c + * Fixed ln so it works now (it was very broken). + * Fixed df so it won't segfault when there is no /etc/fstab, + * If BB_MTAB is not defined, df and mount will whine if /etc/fstab + is not installed (since they cannot fixup "/dev/root" to + state the real root device name) + * merged some redundant code from mtab.c/df.c into utility.c 0.32 * More changes -- many thanks to Lineo for paying me to work on diff --git a/coreutils/df.c b/coreutils/df.c index 94b6b8231..a84a330d8 100644 --- a/coreutils/df.c +++ b/coreutils/df.c @@ -38,6 +38,7 @@ static int df(char *device, const char *mountPoint) struct statfs s; long blocks_used; long blocks_percent_used; + struct fstab* fstabItem; if (statfs(mountPoint, &s) != 0) { perror(mountPoint); @@ -48,9 +49,12 @@ static int df(char *device, const char *mountPoint) blocks_used = s.f_blocks - s.f_bfree; blocks_percent_used = (long) (blocks_used * 100.0 / (blocks_used + s.f_bavail) + 0.5); - if (strcmp(device, "/dev/root") == 0) - device = (getfsfile("/"))->fs_spec; - + /* Note that if /etc/fstab is missing, libc can't fix up /dev/root for us */ + if (strcmp (device, "/dev/root") == 0) { + fstabItem = getfsfile ("/"); + if (fstabItem != NULL) + device = fstabItem->fs_spec; + } printf("%-20s %9ld %9ld %9ld %3ld%% %s\n", device, (long) (s.f_blocks * (s.f_bsize / 1024.0)), @@ -63,52 +67,14 @@ static int df(char *device, const char *mountPoint) return 0; } -/* - * Given a block device, find the mount table entry if that block device - * is mounted. - * - * Given any other file (or directory), find the mount table entry for its - * filesystem. - */ -extern struct mntent *findMountPoint(const char *name, const char *table) -{ - struct stat s; - dev_t mountDevice; - FILE *mountTable; - struct mntent *mountEntry; - - if (stat(name, &s) != 0) - return 0; - - if ((s.st_mode & S_IFMT) == S_IFBLK) - mountDevice = s.st_rdev; - else - mountDevice = s.st_dev; - - - if ((mountTable = setmntent(table, "r")) == 0) - return 0; - - while ((mountEntry = getmntent(mountTable)) != 0) { - if (strcmp(name, mountEntry->mnt_dir) == 0 - || strcmp(name, mountEntry->mnt_fsname) == 0) /* String match. */ - break; - if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */ - break; - if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */ - break; - } - endmntent(mountTable); - return mountEntry; -} - - - extern int df_main(int argc, char **argv) { printf("%-20s %-14s %s %s %s %s\n", "Filesystem", "1k-blocks", "Used", "Available", "Use%", "Mounted on"); + /* Only compiled in if BB_MTAB is not defined */ + whine_if_fstab_is_missing(); + if (argc > 1) { struct mntent *mountEntry; int status; diff --git a/coreutils/ln.c b/coreutils/ln.c index 1e30e2b29..62496fba0 100644 --- a/coreutils/ln.c +++ b/coreutils/ln.c @@ -27,23 +27,21 @@ #include -static const char ln_usage[] = "ln [-s] [-f] original-name additional-name\n" -"\n" -"\tAdd a new name that refers to the same file as \"original-name\"\n" -"\n" -"\t-s:\tUse a \"symbolic\" link, instead of a \"hard\" link.\n" -"\t-f:\tRemove existing destination files.\n"; +static const char ln_usage[] = "ln [OPTION] TARGET... LINK_NAME|DIRECTORY\n" +"Create a link named LINK_NAME or DIRECTORY to the specified TARGET\n" +"\nOptions:\n" +"\t-s\tmake symbolic links instead of hard links\n" +"\t-f\tremove existing destination files\n"; static int symlinkFlag = FALSE; static int removeoldFlag = FALSE; -static const char *destName; extern int ln_main(int argc, char **argv) { int status; - char newdestName[NAME_MAX]; + static char* linkName; if (argc < 3) { usage (ln_usage); @@ -69,30 +67,27 @@ extern int ln_main(int argc, char **argv) } - destName = argv[argc - 1]; + linkName = argv[argc - 1]; - if ((argc > 3) && !(isDirectory(destName))) { - fprintf(stderr, "%s: not a directory\n", destName); + if ((argc > 3) && !(isDirectory(linkName))) { + fprintf(stderr, "%s: not a directory\n", linkName); exit (FALSE); } while (argc-- >= 2) { - strcpy(newdestName, destName); - strcat(newdestName, (*argv)+(strlen(*(++argv)))); - if (removeoldFlag==TRUE ) { - status = ( unlink(newdestName) && errno != ENOENT ); + status = ( unlink(linkName) && errno != ENOENT ); if ( status != 0 ) { - perror(newdestName); + perror(linkName); exit( FALSE); } } if ( symlinkFlag==TRUE) - status = symlink(*argv, newdestName); + status = symlink(*argv, linkName); else - status = link(*argv, newdestName); + status = link(*argv, linkName); if ( status != 0 ) { - perror(newdestName); + perror(linkName); exit( FALSE); } } diff --git a/df.c b/df.c index 94b6b8231..a84a330d8 100644 --- a/df.c +++ b/df.c @@ -38,6 +38,7 @@ static int df(char *device, const char *mountPoint) struct statfs s; long blocks_used; long blocks_percent_used; + struct fstab* fstabItem; if (statfs(mountPoint, &s) != 0) { perror(mountPoint); @@ -48,9 +49,12 @@ static int df(char *device, const char *mountPoint) blocks_used = s.f_blocks - s.f_bfree; blocks_percent_used = (long) (blocks_used * 100.0 / (blocks_used + s.f_bavail) + 0.5); - if (strcmp(device, "/dev/root") == 0) - device = (getfsfile("/"))->fs_spec; - + /* Note that if /etc/fstab is missing, libc can't fix up /dev/root for us */ + if (strcmp (device, "/dev/root") == 0) { + fstabItem = getfsfile ("/"); + if (fstabItem != NULL) + device = fstabItem->fs_spec; + } printf("%-20s %9ld %9ld %9ld %3ld%% %s\n", device, (long) (s.f_blocks * (s.f_bsize / 1024.0)), @@ -63,52 +67,14 @@ static int df(char *device, const char *mountPoint) return 0; } -/* - * Given a block device, find the mount table entry if that block device - * is mounted. - * - * Given any other file (or directory), find the mount table entry for its - * filesystem. - */ -extern struct mntent *findMountPoint(const char *name, const char *table) -{ - struct stat s; - dev_t mountDevice; - FILE *mountTable; - struct mntent *mountEntry; - - if (stat(name, &s) != 0) - return 0; - - if ((s.st_mode & S_IFMT) == S_IFBLK) - mountDevice = s.st_rdev; - else - mountDevice = s.st_dev; - - - if ((mountTable = setmntent(table, "r")) == 0) - return 0; - - while ((mountEntry = getmntent(mountTable)) != 0) { - if (strcmp(name, mountEntry->mnt_dir) == 0 - || strcmp(name, mountEntry->mnt_fsname) == 0) /* String match. */ - break; - if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */ - break; - if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */ - break; - } - endmntent(mountTable); - return mountEntry; -} - - - extern int df_main(int argc, char **argv) { printf("%-20s %-14s %s %s %s %s\n", "Filesystem", "1k-blocks", "Used", "Available", "Use%", "Mounted on"); + /* Only compiled in if BB_MTAB is not defined */ + whine_if_fstab_is_missing(); + if (argc > 1) { struct mntent *mountEntry; int status; diff --git a/internal.h b/internal.h index c66c9f116..8d111a6c9 100644 --- a/internal.h +++ b/internal.h @@ -29,6 +29,7 @@ #include #include #include +#include /* Some useful definitions */ @@ -145,12 +146,19 @@ extern void my_getpwuid(char* name, uid_t uid); extern void my_getgrgid(char* group, gid_t gid); extern int get_kernel_revision(); extern int get_console_fd(char* tty_name); - +extern struct mntent *findMountPoint(const char *name, const char *table); extern void write_mtab(char* blockDevice, char* directory, char* filesystemType, long flags, char* string_flags); extern void erase_mtab(const char * name); +#if defined BB_MTAB +#define whine_if_fstab_is_missing() {} +#else +extern void whine_if_fstab_is_missing(); +#endif + + #if defined (BB_FSCK_MINIX) || defined (BB_MKFS_MINIX) static inline int bit(char * addr,unsigned int nr) diff --git a/ln.c b/ln.c index 1e30e2b29..62496fba0 100644 --- a/ln.c +++ b/ln.c @@ -27,23 +27,21 @@ #include -static const char ln_usage[] = "ln [-s] [-f] original-name additional-name\n" -"\n" -"\tAdd a new name that refers to the same file as \"original-name\"\n" -"\n" -"\t-s:\tUse a \"symbolic\" link, instead of a \"hard\" link.\n" -"\t-f:\tRemove existing destination files.\n"; +static const char ln_usage[] = "ln [OPTION] TARGET... LINK_NAME|DIRECTORY\n" +"Create a link named LINK_NAME or DIRECTORY to the specified TARGET\n" +"\nOptions:\n" +"\t-s\tmake symbolic links instead of hard links\n" +"\t-f\tremove existing destination files\n"; static int symlinkFlag = FALSE; static int removeoldFlag = FALSE; -static const char *destName; extern int ln_main(int argc, char **argv) { int status; - char newdestName[NAME_MAX]; + static char* linkName; if (argc < 3) { usage (ln_usage); @@ -69,30 +67,27 @@ extern int ln_main(int argc, char **argv) } - destName = argv[argc - 1]; + linkName = argv[argc - 1]; - if ((argc > 3) && !(isDirectory(destName))) { - fprintf(stderr, "%s: not a directory\n", destName); + if ((argc > 3) && !(isDirectory(linkName))) { + fprintf(stderr, "%s: not a directory\n", linkName); exit (FALSE); } while (argc-- >= 2) { - strcpy(newdestName, destName); - strcat(newdestName, (*argv)+(strlen(*(++argv)))); - if (removeoldFlag==TRUE ) { - status = ( unlink(newdestName) && errno != ENOENT ); + status = ( unlink(linkName) && errno != ENOENT ); if ( status != 0 ) { - perror(newdestName); + perror(linkName); exit( FALSE); } } if ( symlinkFlag==TRUE) - status = symlink(*argv, newdestName); + status = symlink(*argv, linkName); else - status = link(*argv, newdestName); + status = link(*argv, linkName); if ( status != 0 ) { - perror(newdestName); + perror(linkName); exit( FALSE); } } diff --git a/mount.c b/mount.c index 8b5efe14f..4c085d01b 100644 --- a/mount.c +++ b/mount.c @@ -208,14 +208,13 @@ extern int mount_main (int argc, char **argv) char *filesystemType = "auto"; char *device = NULL; char *directory = NULL; - struct stat statBuf; int all = FALSE; int fakeIt = FALSE; int useMtab = TRUE; int i; - if (stat("/etc/fstab", &statBuf) < 0) - fprintf(stderr, "/etc/fstab file missing -- Please install one.\n\n"); + /* Only compiled in if BB_MTAB is not defined */ + whine_if_fstab_is_missing(); if (argc == 1) { FILE *mountTable = setmntent (mtab_file, "r"); diff --git a/mtab.c b/mtab.c index b6304a174..e855717ce 100644 --- a/mtab.c +++ b/mtab.c @@ -59,48 +59,6 @@ erase_mtab(const char * name) perror(mtab_file); } -/* - * Given a block device, find the mount table entry if that block device - * is mounted. - * - * Given any other file (or directory), find the mount table entry for its - * filesystem. - */ -static struct mntent * -findMountPoint(const char * name, const char * table) -{ - struct stat s; - dev_t mountDevice; - FILE* mountTable; - struct mntent* mountEntry; - - if ( stat(name, &s) != 0 ) - return 0; - - if ( (s.st_mode & S_IFMT) == S_IFBLK ) - mountDevice = s.st_rdev; - else - mountDevice = s.st_dev; - - - if ( (mountTable = setmntent(table, "r")) == 0 ) - return 0; - - while ( (mountEntry = getmntent(mountTable)) != 0 ) { - if ( strcmp(name, mountEntry->mnt_dir) == 0 || - strcmp(name, mountEntry->mnt_fsname) == 0 ) /* String match. */ - break; - if ( stat(mountEntry->mnt_fsname, &s) == 0 && - s.st_rdev == mountDevice ) /* Match the device. */ - break; - if ( stat(mountEntry->mnt_dir, &s) == 0 && - s.st_dev == mountDevice ) /* Match the directory's mount point. */ - break; - } - endmntent(mountTable); - return mountEntry; -} - extern void write_mtab(char* blockDevice, char* directory, char* filesystemType, long flags, char* string_flags) diff --git a/util-linux/mount.c b/util-linux/mount.c index 8b5efe14f..4c085d01b 100644 --- a/util-linux/mount.c +++ b/util-linux/mount.c @@ -208,14 +208,13 @@ extern int mount_main (int argc, char **argv) char *filesystemType = "auto"; char *device = NULL; char *directory = NULL; - struct stat statBuf; int all = FALSE; int fakeIt = FALSE; int useMtab = TRUE; int i; - if (stat("/etc/fstab", &statBuf) < 0) - fprintf(stderr, "/etc/fstab file missing -- Please install one.\n\n"); + /* Only compiled in if BB_MTAB is not defined */ + whine_if_fstab_is_missing(); if (argc == 1) { FILE *mountTable = setmntent (mtab_file, "r"); diff --git a/utility.c b/utility.c index 50d019254..97c597ee6 100644 --- a/utility.c +++ b/utility.c @@ -868,5 +868,64 @@ extern int replace_match(char *haystack, char *needle, char *newNeedle, int igno #endif + + + + +#if defined BB_DF | defined BB_MTAB +/* + * Given a block device, find the mount table entry if that block device + * is mounted. + * + * Given any other file (or directory), find the mount table entry for its + * filesystem. + */ +extern struct mntent *findMountPoint(const char *name, const char *table) +{ + struct stat s; + dev_t mountDevice; + FILE *mountTable; + struct mntent *mountEntry; + + if (stat(name, &s) != 0) + return 0; + + if ((s.st_mode & S_IFMT) == S_IFBLK) + mountDevice = s.st_rdev; + else + mountDevice = s.st_dev; + + + if ((mountTable = setmntent(table, "r")) == 0) + return 0; + + while ((mountEntry = getmntent(mountTable)) != 0) { + if (strcmp(name, mountEntry->mnt_dir) == 0 + || strcmp(name, mountEntry->mnt_fsname) == 0) /* String match. */ + break; + if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */ + break; + if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */ + break; + } + endmntent(mountTable); + return mountEntry; +} + +#endif + + + +#if !defined BB_MTAB && (defined BB_MOUNT || defined BB_DF ) +extern void whine_if_fstab_is_missing() +{ + struct stat statBuf; + if (stat("/etc/fstab", &statBuf) < 0) + fprintf(stderr, "/etc/fstab file missing -- install one to name /dev/root.\n\n"); +} +#endif + + /* END CODE */ + -- 2.25.1