diff options
Diffstat (limited to 'misc')
-rw-r--r-- | misc/fstab.c | 195 |
1 files changed, 136 insertions, 59 deletions
diff --git a/misc/fstab.c b/misc/fstab.c index 8b87a1f1f0..d241051ec9 100644 --- a/misc/fstab.c +++ b/misc/fstab.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc. +/* Copyright (C) 1995, 1996, 1997, 1998 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 @@ -19,98 +19,175 @@ #include <fstab.h> #include <mntent.h> #include <stdio.h> +#include <stdlib.h> +#include <bits/libc-lock.h> -static FILE *fstab; -static struct mntent mntres; -static char buffer[8192]; +#define BUFFER_SIZE 0x1fc0 - -static FILE * -fstab_stream (void) +struct fstab_state { - if (! fstab) - fstab = setmntent (_PATH_FSTAB, "r"); - return fstab; -} + 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) { - if (fstab) - { - rewind (fstab); - return 1; - } - else - fstab = setmntent (_PATH_FSTAB, "r"); - return fstab ? 0 : 1; + return fstab_init (1) != NULL; } -static struct fstab * -internal_function -mnt2fs (struct mntent *m) -{ - static struct fstab f; - - if (m == NULL) - return NULL; - - 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) ? (char *) FSTAB_RW : - hasmntopt (m, FSTAB_RQ) ? (char *) FSTAB_RQ : - hasmntopt (m, FSTAB_RO) ? (char *) FSTAB_RO : - hasmntopt (m, FSTAB_SW) ? (char *) FSTAB_SW : - hasmntopt (m, FSTAB_XX) ? (char *) FSTAB_XX : - (char *) "??"); - f.fs_freq = m->mnt_freq; - f.fs_passno = m->mnt_passno; - return &f; -} struct fstab * getfsent (void) { - FILE *s = fstab_stream (); + struct fstab_state *state; - if (! s) + state = fstab_init (0); + if (state == NULL) return NULL; - - return mnt2fs (__getmntent_r (s, &mntres, buffer, sizeof buffer)); + if (fstab_fetch (state) == NULL) + return NULL; + return fstab_convert (state); } + struct fstab * getfsspec (name) - register const char *name; + const char *name; { + struct fstab_state *state; struct mntent *m; - if (setfsent ()) - while (m = __getmntent_r (fstab, &mntres, buffer, sizeof buffer)) - if (!strcmp (m->mnt_fsname, name)) - return mnt2fs (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 (name) - register const char *name; + const char *name; { + struct fstab_state *state; struct mntent *m; - if (setfsent ()) - while (m = __getmntent_r (fstab, &mntres, buffer, sizeof buffer)) - if (!strcmp (m->mnt_dir, name)) - return mnt2fs (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 () { - if (fstab) + struct fstab_state *state; + + state = &fstab_state; + if (state->fs_fp != NULL) { - (void) endmntent (fstab); - fstab = 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. */ +static void +__attribute__ ((unused)) +fstab_free (void) +{ + char *buffer; + + buffer = fstab_state.fs_buffer; + if (buffer != NULL) + free ((void *) buffer); +} + +text_set_element (__libc_subfreeres, fstab_free); |