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Diffstat (limited to 'REORG.TODO/misc/fstab.c')
| -rw-r--r-- | REORG.TODO/misc/fstab.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/REORG.TODO/misc/fstab.c b/REORG.TODO/misc/fstab.c new file mode 100644 index 0000000000..7da7e2b62b --- /dev/null +++ b/REORG.TODO/misc/fstab.c @@ -0,0 +1,186 @@ +/* Copyright (C) 1995-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <fstab.h> +#include <mntent.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <libc-lock.h> + +#define BUFFER_SIZE 0x1fc0 + +struct fstab_state +{ + FILE *fs_fp; + char *fs_buffer; + struct mntent fs_mntres; + struct fstab fs_ret; +}; + +static struct fstab_state *fstab_init (int opt_rewind); +static struct mntent *fstab_fetch (struct fstab_state *state); +static struct fstab *fstab_convert (struct fstab_state *state); + +static struct fstab_state fstab_state; + + +int +setfsent (void) +{ + return fstab_init (1) != NULL; +} + + +struct fstab * +getfsent (void) +{ + struct fstab_state *state; + + state = fstab_init (0); + if (state == NULL) + return NULL; + if (fstab_fetch (state) == NULL) + return NULL; + return fstab_convert (state); +} + + +struct fstab * +getfsspec (const char *name) +{ + struct fstab_state *state; + struct mntent *m; + + state = fstab_init (1); + if (state == NULL) + return NULL; + while ((m = fstab_fetch (state)) != NULL) + if (strcmp (m->mnt_fsname, name) == 0) + return fstab_convert (state); + return NULL; +} + + +struct fstab * +getfsfile (const char *name) +{ + struct fstab_state *state; + struct mntent *m; + + state = fstab_init (1); + if (state == NULL) + return NULL; + while ((m = fstab_fetch (state)) != NULL) + if (strcmp (m->mnt_dir, name) == 0) + return fstab_convert (state); + return NULL; +} + + +void +endfsent (void) +{ + struct fstab_state *state; + + state = &fstab_state; + if (state->fs_fp != NULL) + { + (void) __endmntent (state->fs_fp); + state->fs_fp = NULL; + } +} + + +static struct fstab_state * +fstab_init (int opt_rewind) +{ + struct fstab_state *state; + char *buffer; + FILE *fp; + + state = &fstab_state; + + buffer = state->fs_buffer; + if (buffer == NULL) + { + buffer = (char *) malloc (BUFFER_SIZE); + if (buffer == NULL) + return NULL; + state->fs_buffer = buffer; + } + + fp = state->fs_fp; + if (fp != NULL) + { + if (opt_rewind) + rewind (fp); + } + else + { + fp = __setmntent (_PATH_FSTAB, "r"); + if (fp == NULL) + return NULL; + state->fs_fp = fp; + } + + return state; +} + + +static struct mntent * +fstab_fetch (struct fstab_state *state) +{ + return __getmntent_r (state->fs_fp, &state->fs_mntres, + state->fs_buffer, BUFFER_SIZE); +} + + +static struct fstab * +fstab_convert (struct fstab_state *state) +{ + struct mntent *m; + struct fstab *f; + + m = &state->fs_mntres; + f = &state->fs_ret; + + f->fs_spec = m->mnt_fsname; + f->fs_file = m->mnt_dir; + f->fs_vfstype = m->mnt_type; + f->fs_mntops = m->mnt_opts; + f->fs_type = (__hasmntopt (m, FSTAB_RW) ? FSTAB_RW : + __hasmntopt (m, FSTAB_RQ) ? FSTAB_RQ : + __hasmntopt (m, FSTAB_RO) ? FSTAB_RO : + __hasmntopt (m, FSTAB_SW) ? FSTAB_SW : + __hasmntopt (m, FSTAB_XX) ? FSTAB_XX : + "??"); + f->fs_freq = m->mnt_freq; + f->fs_passno = m->mnt_passno; + return f; +} + + +/* Make sure the memory is freed if the programs ends while in + memory-debugging mode and something actually was allocated. */ +libc_freeres_fn (fstab_free) +{ + char *buffer; + + buffer = fstab_state.fs_buffer; + free ((void *) buffer); +} |