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Merge "Fix our <mntent.h> implementation."

This commit is contained in:
Elliott Hughes 2014-11-14 00:00:53 +00:00 committed by Gerrit Code Review
parent 288fa03a5a e3c4acf1e3
commit 0a135b4259
2 changed files with 48 additions and 11 deletions
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37
libc/bionic/mntent.cpp
View File

@ -28,11 +28,42 @@
#include <mntent.h> #include <mntent.h>
mntent* getmntent(FILE*) { #include "private/ThreadLocalBuffer.h"
return NULL;
GLOBAL_INIT_THREAD_LOCAL_BUFFER(getmntent_mntent);
GLOBAL_INIT_THREAD_LOCAL_BUFFER(getmntent_strings);
mntent* getmntent(FILE* fp) {
LOCAL_INIT_THREAD_LOCAL_BUFFER(mntent*, getmntent_mntent, sizeof(mntent));
LOCAL_INIT_THREAD_LOCAL_BUFFER(char*, getmntent_strings, BUFSIZ);
return getmntent_r(fp, getmntent_mntent_tls_buffer,
getmntent_strings_tls_buffer, getmntent_strings_tls_buffer_size);
} }
mntent* getmntent_r(FILE*, struct mntent*, char*, int) { mntent* getmntent_r(FILE* fp, struct mntent* e, char* buf, int buf_len) {
memset(e, 0, sizeof(*e));
while (fgets(buf, buf_len, fp) != NULL) {
// Entries look like "proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0".
// That is: mnt_fsname mnt_dir mnt_type mnt_opts 0 0.
int fsname0, fsname1, dir0, dir1, type0, type1, opts0, opts1;
if (sscanf(buf, " %n%*s%n %n%*s%n %n%*s%n %n%*s%n %d %d",
&fsname0, &fsname1, &dir0, &dir1, &type0, &type1, &opts0, &opts1,
&e->mnt_freq, &e->mnt_passno) == 2) {
e->mnt_fsname = &buf[fsname0];
buf[fsname1] = '\0';
e->mnt_dir = &buf[dir0];
buf[dir1] = '\0';
e->mnt_type = &buf[type0];
buf[type1] = '\0';
e->mnt_opts = &buf[opts0];
buf[opts1] = '\0';
return e;
}
}
return NULL; return NULL;
} }

22
tests/mntent_test.cpp
View File

@ -19,16 +19,22 @@
#include <mntent.h> #include <mntent.h>
TEST(mntent, mntent_smoke) { TEST(mntent, mntent_smoke) {
FILE* fp = setmntent("/no/mnt/tab/on/android", "r"); FILE* fp = setmntent("/proc/mounts", "r");
ASSERT_TRUE(fp == NULL); ASSERT_TRUE(fp != NULL);
#if __BIONIC__ // glibc doesn't let you call getmntent/getmntent_r with a NULL FILE*. ASSERT_TRUE(getmntent(fp) != NULL);
ASSERT_TRUE(getmntent(fp) == NULL);
struct mntent mbuf; bool saw_proc = false;
char cbuf[32];
ASSERT_TRUE(getmntent_r(fp, &mbuf, cbuf, sizeof(cbuf)) == NULL); struct mntent entry;
#endif char buf[BUFSIZ];
while (getmntent_r(fp, &entry, buf, sizeof(buf)) != NULL) {
if (strcmp(entry.mnt_fsname, "proc") == 0 && strcmp(entry.mnt_dir, "/proc") == 0) {
saw_proc = true;
}
}
ASSERT_TRUE(saw_proc);
ASSERT_EQ(1, endmntent(fp)); ASSERT_EQ(1, endmntent(fp));
} }