166 lines
3.6 KiB
C
166 lines
3.6 KiB
C
/* Private version of the libc *mntent() routines. */
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/* Note slightly different prototypes. */
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/* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
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* - added Native Language Support
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*/
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#include <stdio.h>
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#include <string.h> /* for index */
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#include <ctype.h> /* for isdigit */
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#include <sys/stat.h> /* for umask */
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#include "mount_mntent.h"
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#include "sundries.h" /* for xmalloc */
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#include "nls.h"
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#include "mangle.h"
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#include "closestream.h"
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static int
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is_space_or_tab (char c) {
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return (c == ' ' || c == '\t');
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}
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static char *
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skip_spaces(char *s) {
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while (is_space_or_tab(*s))
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s++;
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return s;
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}
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/*
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* fstat'ing the file and allocating a buffer holding all of it
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* may be a bad idea: if the file is /proc/mounts, the stat
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* returns 0.
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* (On the other hand, mangling and unmangling is meaningless
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* for /proc/mounts.)
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*/
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mntFILE *
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my_setmntent (const char *file, char *mode) {
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mntFILE *mfp = xmalloc(sizeof(*mfp));
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mode_t old_umask = umask(077);
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mfp->mntent_fp = fopen(file, mode);
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umask(old_umask);
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mfp->mntent_file = xstrdup(file);
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mfp->mntent_errs = (mfp->mntent_fp == NULL);
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mfp->mntent_softerrs = 0;
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mfp->mntent_lineno = 0;
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return mfp;
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}
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void
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my_endmntent(mntFILE * mfp) {
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if (mfp) {
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if (mfp->mntent_fp)
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if (close_stream(mfp->mntent_fp))
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fprintf(stderr, _("write error"));
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free(mfp->mntent_file);
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free(mfp);
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}
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}
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int
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my_addmntent (mntFILE *mfp, struct my_mntent *mnt) {
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char *m1, *m2, *m3, *m4;
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int res;
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if (fseek (mfp->mntent_fp, 0, SEEK_END))
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return 1; /* failure */
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m1 = mangle(mnt->mnt_fsname);
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m2 = mangle(mnt->mnt_dir);
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m3 = mangle(mnt->mnt_type);
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m4 = mnt->mnt_opts ? mangle(mnt->mnt_opts) : "rw";
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res = fprintf (mfp->mntent_fp, "%s %s %s %s %d %d\n",
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m1, m2, m3, m4, mnt->mnt_freq, mnt->mnt_passno);
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free(m1);
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free(m2);
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free(m3);
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if (mnt->mnt_opts)
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free(m4);
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return (res < 0) ? 1 : 0;
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}
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/* Read the next entry from the file fp. Stop reading at an incorrect entry. */
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struct my_mntent *
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my_getmntent (mntFILE *mfp) {
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static char buf[4096];
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static struct my_mntent me;
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char *s;
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again:
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if (mfp->mntent_errs || mfp->mntent_softerrs >= ERR_MAX)
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return NULL;
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/* read the next non-blank non-comment line */
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do {
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if (fgets (buf, sizeof(buf), mfp->mntent_fp) == NULL)
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return NULL;
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mfp->mntent_lineno++;
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s = strchr (buf, '\n');
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if (s == NULL) {
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/* Missing final newline? Otherwise extremely */
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/* long line - assume file was corrupted */
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if (feof(mfp->mntent_fp)) {
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fprintf(stderr, _("[mntent]: warning: no final "
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"newline at the end of %s\n"),
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mfp->mntent_file);
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s = strchr (buf, 0);
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} else {
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mfp->mntent_errs = 1;
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goto err;
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}
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}
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*s = 0;
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if (--s >= buf && *s == '\r')
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*s = 0;
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s = skip_spaces(buf);
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} while (*s == '\0' || *s == '#');
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me.mnt_fsname = unmangle(s, &s);
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s = skip_spaces(s);
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me.mnt_dir = unmangle(s, &s);
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s = skip_spaces(s);
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me.mnt_type = unmangle(s, &s);
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s = skip_spaces(s);
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me.mnt_opts = unmangle(s, &s);
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s = skip_spaces(s);
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if (!me.mnt_fsname || !me.mnt_dir || !me.mnt_type)
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goto err;
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if (isdigit(*s)) {
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me.mnt_freq = atoi(s);
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while(isdigit(*s)) s++;
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} else
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me.mnt_freq = 0;
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if(*s && !is_space_or_tab(*s))
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goto err;
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s = skip_spaces(s);
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if(isdigit(*s)) {
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me.mnt_passno = atoi(s);
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while(isdigit(*s)) s++;
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} else
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me.mnt_passno = 0;
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if(*s && !is_space_or_tab(*s))
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goto err;
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/* allow more stuff, e.g. comments, on this line */
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return &me;
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err:
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mfp->mntent_softerrs++;
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fprintf(stderr, _("[mntent]: line %d in %s is bad%s\n"),
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mfp->mntent_lineno, mfp->mntent_file,
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(mfp->mntent_errs || mfp->mntent_softerrs >= ERR_MAX) ?
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_("; rest of file ignored") : "");
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goto again;
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}
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