Remove trailing whitespaces and change tabs to spaces

This commit is contained in:
Łukasz Niemier
2012-11-18 11:23:22 +01:00
parent b79854ad1a
commit 47df1ae40a
140 changed files with 29549 additions and 29549 deletions

View File

@@ -1,6 +1,6 @@
/** \file postfork.cpp
Functions that we may safely call after fork().
Functions that we may safely call after fork().
*/
#include <fcntl.h>
@@ -44,61 +44,61 @@ static void debug_safe_int(int level, const char *format, int val)
// PCA These calls to debug are rather sketchy because they may allocate memory. Fortunately they only occur if an error occurs.
int set_child_group( job_t *j, process_t *p, int print_errors )
{
int res = 0;
if( job_get_flag( j, JOB_CONTROL ) )
{
if (!j->pgid)
{
j->pgid = p->pid;
}
if( setpgid (p->pid, j->pgid) )
{
if( getpgid( p->pid) != j->pgid && print_errors )
{
int res = 0;
if( job_get_flag( j, JOB_CONTROL ) )
{
if (!j->pgid)
{
j->pgid = p->pid;
}
if( setpgid (p->pid, j->pgid) )
{
if( getpgid( p->pid) != j->pgid && print_errors )
{
char pid_buff[128];
char job_id_buff[128];
char getpgid_buff[128];
char job_pgid_buff[128];
format_long_safe(pid_buff, p->pid);
format_long_safe(job_id_buff, j->job_id);
format_long_safe(getpgid_buff, getpgid( p->pid));
format_long_safe(job_pgid_buff, j->pgid);
debug_safe( 1,
"Could not send process %s, '%s' in job %s, '%s' from group %s to group %s",
pid_buff,
p->argv0_cstr(),
job_id_buff,
j->command_cstr(),
getpgid_buff,
job_pgid_buff );
wperror( L"setpgid" );
res = -1;
}
}
}
else
{
j->pgid = getpid();
}
debug_safe( 1,
"Could not send process %s, '%s' in job %s, '%s' from group %s to group %s",
pid_buff,
p->argv0_cstr(),
job_id_buff,
j->command_cstr(),
getpgid_buff,
job_pgid_buff );
if( job_get_flag( j, JOB_TERMINAL ) && job_get_flag( j, JOB_FOREGROUND ) )
{
if( tcsetpgrp (0, j->pgid) && print_errors )
{
wperror( L"setpgid" );
res = -1;
}
}
}
else
{
j->pgid = getpid();
}
if( job_get_flag( j, JOB_TERMINAL ) && job_get_flag( j, JOB_FOREGROUND ) )
{
if( tcsetpgrp (0, j->pgid) && print_errors )
{
char job_id_buff[128];
format_long_safe(job_id_buff, j->job_id);
debug_safe( 1, "Could not send job %s ('%s') to foreground", job_id_buff, j->command_cstr() );
wperror( L"tcsetpgrp" );
res = -1;
}
}
debug_safe( 1, "Could not send job %s ('%s') to foreground", job_id_buff, j->command_cstr() );
wperror( L"tcsetpgrp" );
res = -1;
}
}
return res;
return res;
}
/** Make sure the fd used by each redirection is not used by a pipe. */
@@ -108,7 +108,7 @@ static void free_redirected_fds_from_pipes(io_chain_t &io_chain)
for (size_t i = 0; i < max; i++)
{
int fd_to_free = io_chain.at(i)->fd;
/* We only have to worry about fds beyond the three standard ones */
if (fd_to_free <= 2)
continue;
@@ -120,14 +120,14 @@ static void free_redirected_fds_from_pipes(io_chain_t &io_chain)
io_data_t *possible_conflict = io_chain.at(j);
if (possible_conflict->io_mode != IO_PIPE && possible_conflict->io_mode != IO_BUFFER)
continue;
/* If the pipe is a conflict, dup it to some other value */
for (int k=0; k<2; k++)
{
/* If it's not a conflict, we don't care */
if (possible_conflict->param1.pipe_fd[k] != fd_to_free)
continue;
/* Repeat until we have a replacement fd */
int replacement_fd = -1;
while (replacement_fd < 0)
@@ -143,7 +143,7 @@ static void free_redirected_fds_from_pipes(io_chain_t &io_chain)
possible_conflict->param1.pipe_fd[k] = replacement_fd;
}
}
}
}
}
@@ -162,149 +162,149 @@ static void free_redirected_fds_from_pipes(io_chain_t &io_chain)
static int handle_child_io( io_chain_t &io_chain )
{
close_unused_internal_pipes( io_chain );
close_unused_internal_pipes( io_chain );
free_redirected_fds_from_pipes(io_chain);
for (size_t idx = 0; idx < io_chain.size(); idx++)
{
for (size_t idx = 0; idx < io_chain.size(); idx++)
{
io_data_t *io = io_chain.at(idx);
int tmp;
if( io->io_mode == IO_FD && io->fd == io->param1.old_fd )
{
continue;
}
switch( io->io_mode )
{
case IO_CLOSE:
{
if( close(io->fd) )
{
debug_safe_int( 0, "Failed to close file descriptor %s", io->fd );
wperror( L"close" );
}
break;
}
int tmp;
case IO_FILE:
{
// Here we definitely do not want to set CLO_EXEC because our child needs access
if( (tmp=open( io->filename_cstr,
io->param2.flags, OPEN_MASK ) )==-1 )
{
if( ( io->param2.flags & O_EXCL ) &&
( errno ==EEXIST ) )
{
debug_safe( 1, NOCLOB_ERROR, io->filename_cstr );
}
else
{
debug_safe( 1, FILE_ERROR, io->filename_cstr );
perror( "open" );
}
return -1;
}
else if( tmp != io->fd)
{
/*
This call will sometimes fail, but that is ok,
this is just a precausion.
*/
close(io->fd);
if(dup2( tmp, io->fd ) == -1 )
{
debug_safe_int( 1, FD_ERROR, io->fd );
perror( "dup2" );
return -1;
}
exec_close( tmp );
}
break;
}
case IO_FD:
{
/*
This call will sometimes fail, but that is ok,
this is just a precausion.
*/
close(io->fd);
if( io->io_mode == IO_FD && io->fd == io->param1.old_fd )
{
continue;
}
if( dup2( io->param1.old_fd, io->fd ) == -1 )
{
debug_safe_int( 1, FD_ERROR, io->fd );
wperror( L"dup2" );
return -1;
}
break;
}
case IO_BUFFER:
case IO_PIPE:
{
switch( io->io_mode )
{
case IO_CLOSE:
{
if( close(io->fd) )
{
debug_safe_int( 0, "Failed to close file descriptor %s", io->fd );
wperror( L"close" );
}
break;
}
case IO_FILE:
{
// Here we definitely do not want to set CLO_EXEC because our child needs access
if( (tmp=open( io->filename_cstr,
io->param2.flags, OPEN_MASK ) )==-1 )
{
if( ( io->param2.flags & O_EXCL ) &&
( errno ==EEXIST ) )
{
debug_safe( 1, NOCLOB_ERROR, io->filename_cstr );
}
else
{
debug_safe( 1, FILE_ERROR, io->filename_cstr );
perror( "open" );
}
return -1;
}
else if( tmp != io->fd)
{
/*
This call will sometimes fail, but that is ok,
this is just a precausion.
*/
close(io->fd);
if(dup2( tmp, io->fd ) == -1 )
{
debug_safe_int( 1, FD_ERROR, io->fd );
perror( "dup2" );
return -1;
}
exec_close( tmp );
}
break;
}
case IO_FD:
{
/*
This call will sometimes fail, but that is ok,
this is just a precausion.
*/
close(io->fd);
if( dup2( io->param1.old_fd, io->fd ) == -1 )
{
debug_safe_int( 1, FD_ERROR, io->fd );
wperror( L"dup2" );
return -1;
}
break;
}
case IO_BUFFER:
case IO_PIPE:
{
/* If write_pipe_idx is 0, it means we're connecting to the read end (first pipe fd). If it's 1, we're connecting to the write end (second pipe fd). */
unsigned int write_pipe_idx = (io->is_input ? 0 : 1);
unsigned int write_pipe_idx = (io->is_input ? 0 : 1);
/*
debug( 0,
L"%ls %ls on fd %d (%d %d)",
write_pipe?L"write":L"read",
(io->io_mode == IO_BUFFER)?L"buffer":L"pipe",
io->fd,
io->param1.pipe_fd[0],
io->param1.pipe_fd[1]);
debug( 0,
L"%ls %ls on fd %d (%d %d)",
write_pipe?L"write":L"read",
(io->io_mode == IO_BUFFER)?L"buffer":L"pipe",
io->fd,
io->param1.pipe_fd[0],
io->param1.pipe_fd[1]);
*/
if( dup2( io->param1.pipe_fd[write_pipe_idx], io->fd ) != io->fd )
{
debug_safe( 1, LOCAL_PIPE_ERROR );
perror( "dup2" );
return -1;
}
if( dup2( io->param1.pipe_fd[write_pipe_idx], io->fd ) != io->fd )
{
debug_safe( 1, LOCAL_PIPE_ERROR );
perror( "dup2" );
return -1;
}
if (io->param1.pipe_fd[0] >= 0)
exec_close( io->param1.pipe_fd[0]);
if (io->param1.pipe_fd[1] >= 0)
exec_close( io->param1.pipe_fd[1]);
break;
}
}
}
break;
}
}
}
return 0;
return 0;
}
int setup_child_process( job_t *j, process_t *p )
{
bool ok=true;
if( p )
{
ok = (0 == set_child_group( j, p, 1 ));
}
if( ok )
{
ok = (0 == handle_child_io( j->io ));
if( p != 0 && ! ok )
{
exit_without_destructors( 1 );
}
}
/* Set the handling for job control signals back to the default. */
if( ok )
{
signal_reset_handlers();
}
/* Remove all signal blocks */
signal_unblock();
return ok ? 0 : -1;
bool ok=true;
if( p )
{
ok = (0 == set_child_group( j, p, 1 ));
}
if( ok )
{
ok = (0 == handle_child_io( j->io ));
if( p != 0 && ! ok )
{
exit_without_destructors( 1 );
}
}
/* Set the handling for job control signals back to the default. */
if( ok )
{
signal_reset_handlers();
}
/* Remove all signal blocks */
signal_unblock();
return ok ? 0 : -1;
}
int g_fork_count = 0;
@@ -318,47 +318,47 @@ int g_fork_count = 0;
pid_t execute_fork(bool wait_for_threads_to_die)
{
ASSERT_IS_MAIN_THREAD();
if (wait_for_threads_to_die) {
/* Make sure we have no outstanding threads before we fork. This is a pretty sketchy thing to do here, both because exec.cpp shouldn't have to know about iothreads, and because the completion handlers may do unexpected things. */
iothread_drain_all();
}
pid_t pid;
struct timespec pollint;
int i;
pid_t pid;
struct timespec pollint;
int i;
g_fork_count++;
for( i=0; i<FORK_LAPS; i++ )
{
pid = fork();
if( pid >= 0)
{
return pid;
}
if( errno != EAGAIN )
{
break;
}
pollint.tv_sec = 0;
pollint.tv_nsec = FORK_SLEEP_TIME;
for( i=0; i<FORK_LAPS; i++ )
{
pid = fork();
if( pid >= 0)
{
return pid;
}
/*
Don't sleep on the final lap - sleeping might change the
value of errno, which will break the error reporting below.
*/
if( i != FORK_LAPS-1 )
{
nanosleep( &pollint, NULL );
}
}
debug_safe( 0, FORK_ERROR );
wperror (L"fork");
FATAL_EXIT();
if( errno != EAGAIN )
{
break;
}
pollint.tv_sec = 0;
pollint.tv_nsec = FORK_SLEEP_TIME;
/*
Don't sleep on the final lap - sleeping might change the
value of errno, which will break the error reporting below.
*/
if( i != FORK_LAPS-1 )
{
nanosleep( &pollint, NULL );
}
}
debug_safe( 0, FORK_ERROR );
wperror (L"fork");
FATAL_EXIT();
return 0;
}
@@ -369,18 +369,18 @@ bool fork_actions_make_spawn_properties(posix_spawnattr_t *attr, posix_spawn_fil
if (posix_spawnattr_init(attr) != 0) {
return false;
}
if (posix_spawn_file_actions_init(actions) != 0) {
posix_spawnattr_destroy(attr);
return false;
}
bool should_set_parent_group_id = false;
int desired_parent_group_id = 0;
if (job_get_flag(j, JOB_CONTROL))
{
should_set_parent_group_id = true;
// PCA: I'm quite fuzzy on process groups,
// but I believe that the default value of 0
// means that the process becomes its own
@@ -388,13 +388,13 @@ bool fork_actions_make_spawn_properties(posix_spawnattr_t *attr, posix_spawn_fil
// in this case. So we want this to be 0 if j->pgid is 0.
desired_parent_group_id = j->pgid;
}
/* Set the handling for job control signals back to the default. */
bool reset_signal_handlers = true;
/* Remove all signal blocks */
bool reset_sigmask = true;
/* Set the handling for job control signals back to the default. */
bool reset_signal_handlers = true;
/* Remove all signal blocks */
bool reset_sigmask = true;
/* Set our flags */
short flags = 0;
if (reset_signal_handlers)
@@ -403,7 +403,7 @@ bool fork_actions_make_spawn_properties(posix_spawnattr_t *attr, posix_spawn_fil
flags |= POSIX_SPAWN_SETSIGMASK;
if (should_set_parent_group_id)
flags |= POSIX_SPAWN_SETPGROUP;
int err = 0;
if (! err)
err = posix_spawnattr_setflags(attr, flags);
@@ -418,16 +418,16 @@ bool fork_actions_make_spawn_properties(posix_spawnattr_t *attr, posix_spawn_fil
get_signals_with_handlers(&sigdefault);
err = posix_spawnattr_setsigdefault(attr, &sigdefault);
}
/* No signals blocked */
sigset_t sigmask;
sigemptyset(&sigmask);
if (! err && reset_sigmask)
err = posix_spawnattr_setsigmask(attr, &sigmask);
/* Make sure that our pipes don't use an fd that the redirection itself wants to use */
free_redirected_fds_from_pipes(j->io);
/* Close unused internal pipes */
std::vector<int> files_to_close;
get_unused_internal_pipes(files_to_close, j->io);
@@ -435,22 +435,22 @@ bool fork_actions_make_spawn_properties(posix_spawnattr_t *attr, posix_spawn_fil
{
err = posix_spawn_file_actions_addclose(actions, files_to_close.at(i));
}
for (size_t idx = 0; idx < j->io.size(); idx++)
{
const io_data_t *io = j->io.at(idx);
if( io->io_mode == IO_FD && io->fd == io->param1.old_fd )
{
continue;
}
if( io->fd > 2 )
{
/* Make sure the fd used by this redirection is not used by e.g. a pipe. */
if( io->io_mode == IO_FD && io->fd == io->param1.old_fd )
{
continue;
}
if( io->fd > 2 )
{
/* Make sure the fd used by this redirection is not used by e.g. a pipe. */
// free_fd(io_chain, io->fd );
// PCA I don't think we need to worry about this. fd redirection is pretty uncommon anyways.
}
}
switch (io->io_mode)
{
case IO_CLOSE:
@@ -459,141 +459,141 @@ bool fork_actions_make_spawn_properties(posix_spawnattr_t *attr, posix_spawn_fil
err = posix_spawn_file_actions_addclose(actions, io->fd);
break;
}
case IO_FILE:
{
if (! err)
if (! err)
err = posix_spawn_file_actions_addopen(actions, io->fd, io->filename_cstr, io->param2.flags /* mode */, OPEN_MASK);
break;
}
case IO_FD:
{
if (! err)
err = posix_spawn_file_actions_adddup2(actions, io->param1.old_fd /* from */, io->fd /* to */);
break;
}
case IO_BUFFER:
case IO_PIPE:
{
case IO_BUFFER:
case IO_PIPE:
{
unsigned int write_pipe_idx = (io->is_input ? 0 : 1);
int from_fd = io->param1.pipe_fd[write_pipe_idx];
int to_fd = io->fd;
if (! err)
err = posix_spawn_file_actions_adddup2(actions, from_fd, to_fd);
if( write_pipe_idx > 0 )
{
if (! err)
if( write_pipe_idx > 0 )
{
if (! err)
err = posix_spawn_file_actions_addclose(actions, io->param1.pipe_fd[0]);
if (! err)
err = posix_spawn_file_actions_addclose(actions, io->param1.pipe_fd[1]);
}
else
{
if (! err)
}
else
{
if (! err)
err = posix_spawn_file_actions_addclose(actions, io->param1.pipe_fd[0]);
}
}
break;
}
}
}
/* Clean up on error */
if (err) {
posix_spawnattr_destroy(attr);
posix_spawn_file_actions_destroy(actions);
}
return ! err;
}
#endif //FISH_USE_POSIX_SPAWN
void safe_report_exec_error(int err, const char *actual_cmd, char **argv, char **envv)
{
debug_safe( 0, "Failed to execute process '%s'. Reason:", actual_cmd );
switch( err )
{
case E2BIG:
{
char sz1[128], sz2[128];
long arg_max = -1;
debug_safe( 0, "Failed to execute process '%s'. Reason:", actual_cmd );
switch( err )
{
case E2BIG:
{
char sz1[128], sz2[128];
long arg_max = -1;
size_t sz = 0;
char **p;
for(p=argv; *p; p++)
{
sz += strlen(*p)+1;
}
for(p=envv; *p; p++)
{
sz += strlen(*p)+1;
}
size_t sz = 0;
char **p;
for(p=argv; *p; p++)
{
sz += strlen(*p)+1;
}
for(p=envv; *p; p++)
{
sz += strlen(*p)+1;
}
format_size_safe(sz1, sz);
arg_max = sysconf( _SC_ARG_MAX );
if( arg_max > 0 )
{
arg_max = sysconf( _SC_ARG_MAX );
if( arg_max > 0 )
{
format_size_safe(sz2, sz);
debug_safe(0, "The total size of the argument and environment lists %s exceeds the operating system limit of %s.", sz1, sz2);
}
else
{
debug_safe( 0, "The total size of the argument and environment lists (%s) exceeds the operating system limit.", sz1);
}
debug_safe(0, "Try running the command again with fewer arguments.");
break;
}
}
else
{
debug_safe( 0, "The total size of the argument and environment lists (%s) exceeds the operating system limit.", sz1);
}
case ENOEXEC:
{
debug_safe(0, "Try running the command again with fewer arguments.");
break;
}
case ENOEXEC:
{
/* Hope strerror doesn't allocate... */
const char *err = strerror(errno);
debug_safe(0, "exec: %s", err);
debug_safe(0, "The file '%s' is marked as an executable but could not be run by the operating system.", actual_cmd);
break;
}
case ENOENT:
{
debug_safe(0, "The file '%s' is marked as an executable but could not be run by the operating system.", actual_cmd);
break;
}
case ENOENT:
{
/* ENOENT is returned by exec() when the path fails, but also returned by posix_spawn if an open file action fails. These cases appear to be impossible to distinguish. We address this by not using posix_spawn for file redirections, so all the ENOENTs we find must be errors from exec(). */
char interpreter_buff[128] = {}, *interpreter;
interpreter = get_interpreter(actual_cmd, interpreter_buff, sizeof interpreter_buff);
if( interpreter && 0 != access( interpreter, X_OK ) )
{
debug_safe(0, "The file '%s' specified the interpreter '%s', which is not an executable command.", actual_cmd, interpreter );
}
else
{
debug_safe(0, "The file '%s' does not exist or could not be executed.", actual_cmd);
}
if( interpreter && 0 != access( interpreter, X_OK ) )
{
debug_safe(0, "The file '%s' specified the interpreter '%s', which is not an executable command.", actual_cmd, interpreter );
}
else
{
debug_safe(0, "The file '%s' does not exist or could not be executed.", actual_cmd);
}
break;
}
}
case ENOMEM:
{
debug_safe(0, "Out of memory");
case ENOMEM:
{
debug_safe(0, "Out of memory");
break;
}
}
default:
{
default:
{
/* Hope strerror doesn't allocate... */
const char *err = strerror(errno);
debug_safe(0, "exec: %s", err);
// debug(0, L"The file '%ls' is marked as an executable but could not be run by the operating system.", p->actual_cmd);
// debug(0, L"The file '%ls' is marked as an executable but could not be run by the operating system.", p->actual_cmd);
break;
}
}
}
}
}