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linux-user: Consistently return host errnos from do_openat() 

The function do_openat() is not consistent about whether it is
returning a host errno or a guest errno in case of failure.
Standardise on returning -1 with errno set (ie caller has
to call get_errno()).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reported-by: Timothy Edward Baldwin <T.E.Baldwin99@members.leeds.ac.uk>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Peter Maydell 2016-05-12 18:47:26 +01:00 committed by Riku Voipio
parent 2466119c95
commit a3ca7bb259
1 changed files with 10 additions and 4 deletions
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14
linux-user/syscall.c
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@ -5559,7 +5559,9 @@ static int open_self_cmdline(void *cpu_env, int fd)
nb_read = read(fd_orig, buf, sizeof(buf));
if (nb_read < 0) {
int e = errno;
fd_orig = close(fd_orig);
errno = e;
return -1;
} else if (nb_read == 0) {
break;
@ -5579,7 +5581,9 @@ static int open_self_cmdline(void *cpu_env, int fd)
if (word_skipped) {
if (write(fd, cp_buf, nb_read) != nb_read) {
int e = errno;
close(fd_orig);
errno = e;
return -1;
}
}
@ -5599,7 +5603,7 @@ static int open_self_maps(void *cpu_env, int fd)
fp = fopen("/proc/self/maps", "r");
if (fp == NULL) {
return -EACCES;
return -1;
}
while ((read = getline(&line, &len, fp)) != -1) {
@ -5743,7 +5747,7 @@ static int open_net_route(void *cpu_env, int fd)
fp = fopen("/proc/net/route", "r");
if (fp == NULL) {
return -EACCES;
return -1;
}
/* read header */
@ -5793,7 +5797,7 @@ static int do_openat(void *cpu_env, int dirfd, const char *pathname, int flags,
if (is_proc_myself(pathname, "exe")) {
int execfd = qemu_getauxval(AT_EXECFD);
return execfd ? execfd : get_errno(sys_openat(dirfd, exec_path, flags, mode));
return execfd ? execfd : sys_openat(dirfd, exec_path, flags, mode);
}
for (fake_open = fakes; fake_open->filename; fake_open++) {
@ -5819,7 +5823,9 @@ static int do_openat(void *cpu_env, int dirfd, const char *pathname, int flags,
unlink(filename);
if ((r = fake_open->fill(cpu_env, fd))) {
int e = errno;
close(fd);
errno = e;
return r;
}
lseek(fd, 0, SEEK_SET);
@ -5827,7 +5833,7 @@ static int do_openat(void *cpu_env, int dirfd, const char *pathname, int flags,
return fd;
}
return get_errno(sys_openat(dirfd, path(pathname), flags, mode));
return sys_openat(dirfd, path(pathname), flags, mode);
}
#define TIMER_MAGIC 0x0caf0000