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autofs-5.1.5 - add glibc getmntent_r()
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From: Ian Kent <raven@themaw.net>
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Add a slightly modified version of the glibc getmntent_r() function
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so autofs can read the proc mount table directly.
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Signed-off-by: Ian Kent <raven@themaw.net>
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---
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CHANGELOG | 1
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lib/mounts.c | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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2 files changed, 96 insertions(+)
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--- autofs-5.1.4.orig/CHANGELOG
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+++ autofs-5.1.4/CHANGELOG
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@@ -66,6 +66,7 @@ xx/xx/2018 autofs-5.1.5
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- use bit flags for autofs mount types in mnt_list.
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- use mp instead of path in mnt_list entries.
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- always use PROC_MOUNTS to make mount lists.
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+- add glibc getmntent_r().
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19/12/2017 autofs-5.1.4
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- fix spec file url.
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--- autofs-5.1.4.orig/lib/mounts.c
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+++ autofs-5.1.4/lib/mounts.c
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@@ -786,6 +786,101 @@ done:
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return ret;
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}
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+/* From glibc decode_name() */
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+/* Since the values in a line are separated by spaces, a name cannot
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+ * contain a space. Therefore some programs encode spaces in names
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+ * by the strings "\040". We undo the encoding when reading an entry.
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+ * The decoding happens in place.
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+ */
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+static char *local_decode_name(char *buf)
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+{
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+ char *rp = buf;
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+ char *wp = buf;
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+
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+ do {
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+ if (rp[0] == '\\' && rp[1] == '0' &&
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+ rp[2] == '4' && rp[3] == '0') {
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+ /* \040 is a SPACE. */
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+ *wp++ = ' ';
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+ rp += 3;
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+ } else if (rp[0] == '\\' && rp[1] == '0' &&
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+ rp[2] == '1' && rp[3] == '1') {
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+ /* \011 is a TAB. */
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+ *wp++ = '\t';
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+ rp += 3;
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+ } else if (rp[0] == '\\' && rp[1] == '0' &&
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+ rp[2] == '1' && rp[3] == '2') {
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+ /* \012 is a NEWLINE. */
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+ *wp++ = '\n';
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+ rp += 3;
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+ } else if (rp[0] == '\\' && rp[1] == '\\') {
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+ /*
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+ * We have to escape \\ to be able to represent
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+ * all characters.
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+ */
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+ *wp++ = '\\';
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+ rp += 1;
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+ } else if (rp[0] == '\\' && rp[1] == '1' &&
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+ rp[2] == '3' && rp[3] == '4') {
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+ /* \134 is also \\. */
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+ *wp++ = '\\';
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+ rp += 3;
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+ } else
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+ *wp++ = *rp;
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+ } while (*rp++ != '\0');
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+
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+ return buf;
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+}
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+
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+/* From glibc getmntent_r() */
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+static struct mntent *
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+local_getmntent_r(FILE *tab, struct mntent *mnt, char *buf, int size)
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+{
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+ char *cp, *head;
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+
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+ do {
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+ char *end_ptr;
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+
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+ if (fgets(buf, size, tab) == NULL)
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+ return 0;
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+
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+ end_ptr = strchr(buf, '\n');
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+ if (end_ptr != NULL) {
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+ while (end_ptr[-1] == ' ' || end_ptr[-1] == '\t')
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+ end_ptr--;
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+ *end_ptr = '\0';
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+ } else {
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+ /* Whole line was not read. Do it now but forget it. */
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+ char tmp[1024];
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+ while (fgets(tmp, sizeof tmp, tab) != NULL)
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+ if (strchr(tmp, '\n') != NULL)
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+ break;
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+ }
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+
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+ head = buf + strspn(buf, " \t");
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+ /* skip empty lines and comment lines */
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+ } while (head[0] == '\0' || head[0] == '#');
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+
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+ cp = strsep(&head, " \t");
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+ mnt->mnt_fsname = cp != NULL ? local_decode_name(cp) : (char *) "";
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+ if (head)
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+ head += strspn(head, " \t");
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+ cp = strsep(&head, " \t");
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+ mnt->mnt_dir = cp != NULL ? local_decode_name (cp) : (char *) "";
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+ if (head)
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+ head += strspn(head, " \t");
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+ cp = strsep(&head, " \t");
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+ mnt->mnt_type = cp != NULL ? local_decode_name (cp) : (char *) "";
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+ if (head)
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+ head += strspn (head, " \t");
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+ cp = strsep (&head, " \t");
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+ mnt->mnt_opts = cp != NULL ? local_decode_name (cp) : (char *) "";
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+
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+ /* autofs doesn't need freq or passno */
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+
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+ return mnt;
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+}
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+
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/*
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* Get list of mounts under path in longest->shortest order
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*/
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