diff options
Diffstat (limited to 'newlib/libc/sys/linux/mntent_r.c')
| -rw-r--r-- | newlib/libc/sys/linux/mntent_r.c | 256 |
1 files changed, 0 insertions, 256 deletions
diff --git a/newlib/libc/sys/linux/mntent_r.c b/newlib/libc/sys/linux/mntent_r.c deleted file mode 100644 index b534fb69d..000000000 --- a/newlib/libc/sys/linux/mntent_r.c +++ /dev/null @@ -1,256 +0,0 @@ -/* Utilities for reading/writing fstab, mtab, etc. - Copyright (C) 1995-2000, 2001 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, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <alloca.h> -#include <mntent.h> -#include <stdio.h> -#include <string.h> -#include <sys/types.h> -#include <machine/weakalias.h> - -/* Prepare to begin reading and/or writing mount table entries from the - beginning of FILE. MODE is as for `fopen'. */ -FILE * -__setmntent (const char *file, const char *mode) -{ - FILE *result = fopen (file, mode); - - return result; -} -weak_alias (__setmntent, setmntent) - - -/* Close a stream opened with `setmntent'. */ -int -__endmntent (FILE *stream) -{ - if (stream) /* SunOS 4.x allows for NULL stream */ - fclose (stream); - return 1; /* SunOS 4.x says to always return 1 */ -} -weak_alias (__endmntent, endmntent) - - -/* Since the values in a line are separated by spaces, a name cannot - contain a space. Therefore some programs encode spaces in names - by the strings "\040". We undo the encoding when reading an entry. - The decoding happens in place. */ -static char * -decode_name (char *buf) -{ - char *rp = buf; - char *wp = buf; - - do - if (rp[0] == '\\' && rp[1] == '0' && rp[2] == '4' && rp[3] == '0') - { - /* \040 is a SPACE. */ - *wp++ = ' '; - rp += 3; - } - else if (rp[0] == '\\' && rp[1] == '0' && rp[2] == '1' && rp[3] == '2') - { - /* \012 is a TAB. */ - *wp++ = '\t'; - rp += 3; - } - else if (rp[0] == '\\' && rp[1] == '\\') - { - /* We have to escape \\ to be able to represent all characters. */ - *wp++ = '\\'; - rp += 1; - } - else - *wp++ = *rp; - while (*rp++ != '\0'); - - return buf; -} - - -/* Read one mount table entry from STREAM. Returns a pointer to storage - reused on the next call, or null for EOF or error (use feof/ferror to - check). */ -struct mntent * -__getmntent_r (FILE *stream, struct mntent *mp, char *buffer, int bufsiz) -{ - char *cp; - char *head; - - flockfile (stream); - do - { - char *end_ptr; - - if (fgets (buffer, bufsiz, stream) == NULL) - { - funlockfile (stream); - return NULL; - } - - end_ptr = strchr (buffer, '\n'); - if (end_ptr != NULL) /* chop newline */ - *end_ptr = '\0'; - else - { - /* Not the whole line was read. Do it now but forget it. */ - char tmp[1024]; - while (fgets (tmp, sizeof tmp, stream) != NULL) - if (strchr (tmp, '\n') != NULL) - break; - } - - head = buffer + strspn (buffer, " \t"); - /* skip empty lines and comment lines: */ - } - while (head[0] == '\0' || head[0] == '#'); - - cp = strsep (&head, " \t"); - mp->mnt_fsname = cp != NULL ? decode_name (cp) : (char *) ""; - if (head) - head += strspn (head, " \t"); - cp = strsep (&head, " \t"); - mp->mnt_dir = cp != NULL ? decode_name (cp) : (char *) ""; - if (head) - head += strspn (head, " \t"); - cp = strsep (&head, " \t"); - mp->mnt_type = cp != NULL ? decode_name (cp) : (char *) ""; - if (head) - head += strspn (head, " \t"); - cp = strsep (&head, " \t"); - mp->mnt_opts = cp != NULL ? decode_name (cp) : (char *) ""; - switch (head ? sscanf (head, " %d %d ", &mp->mnt_freq, &mp->mnt_passno) : 0) - { - case 0: - mp->mnt_freq = 0; - case 1: - mp->mnt_passno = 0; - case 2: - break; - } - funlockfile (stream); - - return mp; -} -weak_alias (__getmntent_r, getmntent_r) - - -/* We have to use an encoding for names if they contain spaces or tabs. - To be able to represent all characters we also have to escape the - backslash itself. This "function" must be a macro since we use - `alloca'. */ -#define encode_name(name) \ - do { \ - const char *rp = name; \ - \ - while (*rp != '\0') \ - if (*rp == ' ' || *rp == '\t' || *rp == '\\') \ - break; \ - else \ - ++rp; \ - \ - if (*rp != '\0') \ - { \ - /* In the worst case the length of the string can increase to \ - founr times the current length. */ \ - char *wp; \ - \ - rp = name; \ - name = wp = (char *) alloca (strlen (name) * 4 + 1); \ - \ - do \ - if (*rp == ' ') \ - { \ - *wp++ = '\\'; \ - *wp++ = '0'; \ - *wp++ = '4'; \ - *wp++ = '0'; \ - } \ - else if (*rp == '\t') \ - { \ - *wp++ = '\\'; \ - *wp++ = '0'; \ - *wp++ = '1'; \ - *wp++ = '2'; \ - } \ - else if (*rp == '\\') \ - { \ - *wp++ = '\\'; \ - *wp++ = '\\'; \ - } \ - else \ - *wp++ = *rp; \ - while (*rp++ != '\0'); \ - } \ - } while (0) - - -/* Write the mount table entry described by MNT to STREAM. - Return zero on success, nonzero on failure. */ -int -__addmntent (FILE *stream, const struct mntent *mnt) -{ - struct mntent mntcopy = *mnt; - if (fseek (stream, 0, SEEK_END)) - return 1; - - /* Encode spaces and tabs in the names. */ - encode_name (mntcopy.mnt_fsname); - encode_name (mntcopy.mnt_dir); - encode_name (mntcopy.mnt_type); - encode_name (mntcopy.mnt_opts); - - return (fprintf (stream, "%s %s %s %s %d %d\n", - mntcopy.mnt_fsname, - mntcopy.mnt_dir, - mntcopy.mnt_type, - mntcopy.mnt_opts, - mntcopy.mnt_freq, - mntcopy.mnt_passno) - < 0 ? 1 : 0); -} -weak_alias (__addmntent, addmntent) - - -/* Search MNT->mnt_opts for an option matching OPT. - Returns the address of the substring, or null if none found. */ -char * -__hasmntopt (const struct mntent *mnt, const char *opt) -{ - const size_t optlen = strlen (opt); - char *rest = mnt->mnt_opts, *p; - - while ((p = strstr (rest, opt)) != NULL) - { - if (p == rest - || (p[-1] == ',' - && (p[optlen] == '\0' || - p[optlen] == '=' || - p[optlen] == ','))) - return p; - - rest = strchr (rest, ','); - if (rest == NULL) - break; - ++rest; - } - - return NULL; -} -weak_alias (__hasmntopt, hasmntopt) |