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refactor: move various things to os/shell.c

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- No code changes
- Rename mch_expand_wildcards => os_expand_wildcards
This commit is contained in:
Justin M. Keyes 2020-02-02 21:46:51 -08:00
parent 983086f42e
commit d1d5f5103e
3 changed files with 502 additions and 510 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

498
src/nvim/os/shell.c
View File

@ -9,13 +9,17 @@
#include <uv.h>
#include "nvim/ascii.h"
#include "nvim/fileio.h"
#include "nvim/lib/kvec.h"
#include "nvim/log.h"
#include "nvim/event/loop.h"
#include "nvim/event/libuv_process.h"
#include "nvim/event/rstream.h"
#include "nvim/ex_cmds.h"
#include "nvim/misc1.h"
#include "nvim/os/shell.h"
#include "nvim/os/signal.h"
#include "nvim/path.h"
#include "nvim/types.h"
#include "nvim/main.h"
#include "nvim/vim.h"
@ -32,6 +36,8 @@
#define NS_1_SECOND 1000000000U // 1 second, in nanoseconds
#define OUT_DATA_THRESHOLD 1024 * 10U // 10KB, "a few screenfuls" of data.
#define SHELL_SPECIAL (char_u *)"\t \"&'$;<>()\\|"
typedef struct {
char *data;
size_t cap, len;
@ -41,6 +47,498 @@ typedef struct {
# include "os/shell.c.generated.h"
#endif
static void save_patterns(int num_pat, char_u **pat, int *num_file,
char_u ***file)
{
*file = xmalloc((size_t)num_pat * sizeof(char_u *));
for (int i = 0; i < num_pat; i++) {
char_u *s = vim_strsave(pat[i]);
// Be compatible with expand_filename(): halve the number of
// backslashes.
backslash_halve(s);
(*file)[i] = s;
}
*num_file = num_pat;
}
static bool have_wildcard(int num, char_u **file)
{
for (int i = 0; i < num; i++) {
if (path_has_wildcard(file[i])) {
return true;
}
}
return false;
}
static bool have_dollars(int num, char_u **file)
{
for (int i = 0; i < num; i++) {
if (vim_strchr(file[i], '$') != NULL) {
return true;
}
}
return false;
}
/// Performs wildcard pattern matching using the shell.
///
/// @param num_pat is the number of input patterns.
/// @param pat is an array of pointers to input patterns.
/// @param[out] num_file is pointer to number of matched file names.
/// Set to the number of pointers in *file.
/// @param[out] file is pointer to array of pointers to matched file names.
/// Memory pointed to by the initial value of *file will
/// not be freed.
/// Set to NULL if FAIL is returned. Otherwise points to
/// allocated memory.
/// @param flags is a combination of EW_* flags used in
/// expand_wildcards().
/// If matching fails but EW_NOTFOUND is set in flags or
/// there are no wildcards, the patterns from pat are
/// copied into *file.
///
/// @returns OK for success or FAIL for error.
int os_expand_wildcards(int num_pat, char_u **pat, int *num_file,
char_u ***file, int flags) FUNC_ATTR_NONNULL_ARG(3)
FUNC_ATTR_NONNULL_ARG(4)
{
int i;
size_t len;
char_u *p;
bool dir;
char_u *extra_shell_arg = NULL;
ShellOpts shellopts = kShellOptExpand | kShellOptSilent;
int j;
char_u *tempname;
char_u *command;
FILE *fd;
char_u *buffer;
#define STYLE_ECHO 0 /* use "echo", the default */
#define STYLE_GLOB 1 /* use "glob", for csh */
#define STYLE_VIMGLOB 2 /* use "vimglob", for Posix sh */
#define STYLE_PRINT 3 /* use "print -N", for zsh */
#define STYLE_BT 4 /* `cmd` expansion, execute the pattern
* directly */
int shell_style = STYLE_ECHO;
int check_spaces;
static bool did_find_nul = false;
bool ampersent = false;
// vimglob() function to define for Posix shell
static char *sh_vimglob_func =
"vimglob() { while [ $# -ge 1 ]; do echo \"$1\"; shift; done }; vimglob >";
bool is_fish_shell =
#if defined(UNIX)
STRNCMP(invocation_path_tail(p_sh, NULL), "fish", 4) == 0;
#else
false;
#endif
*num_file = 0; // default: no files found
*file = NULL;
// If there are no wildcards, just copy the names to allocated memory.
// Saves a lot of time, because we don't have to start a new shell.
if (!have_wildcard(num_pat, pat)) {
save_patterns(num_pat, pat, num_file, file);
return OK;
}
// Don't allow any shell command in the sandbox.
if (sandbox != 0 && check_secure()) {
return FAIL;
}
// Don't allow the use of backticks in secure and restricted mode.
if (secure || restricted) {
for (i = 0; i < num_pat; i++) {
if (vim_strchr(pat[i], '`') != NULL
&& (check_restricted() || check_secure())) {
return FAIL;
}
}
}
// get a name for the temp file
if ((tempname = vim_tempname()) == NULL) {
EMSG(_(e_notmp));
return FAIL;
}
// Let the shell expand the patterns and write the result into the temp
// file.
// STYLE_BT: NL separated
// If expanding `cmd` execute it directly.
// STYLE_GLOB: NUL separated
// If we use *csh, "glob" will work better than "echo".
// STYLE_PRINT: NL or NUL separated
// If we use *zsh, "print -N" will work better than "glob".
// STYLE_VIMGLOB: NL separated
// If we use *sh*, we define "vimglob()".
// STYLE_ECHO: space separated.
// A shell we don't know, stay safe and use "echo".
if (num_pat == 1 && *pat[0] == '`'
&& (len = STRLEN(pat[0])) > 2
&& *(pat[0] + len - 1) == '`') {
shell_style = STYLE_BT;
} else if ((len = STRLEN(p_sh)) >= 3) {
if (STRCMP(p_sh + len - 3, "csh") == 0) {
shell_style = STYLE_GLOB;
} else if (STRCMP(p_sh + len - 3, "zsh") == 0) {
shell_style = STYLE_PRINT;
}
}
if (shell_style == STYLE_ECHO && strstr((char *)path_tail(p_sh),
"sh") != NULL)
shell_style = STYLE_VIMGLOB;
// Compute the length of the command. We need 2 extra bytes: for the
// optional '&' and for the NUL.
// Worst case: "unset nonomatch; print -N >" plus two is 29
len = STRLEN(tempname) + 29;
if (shell_style == STYLE_VIMGLOB)
len += STRLEN(sh_vimglob_func);
for (i = 0; i < num_pat; i++) {
// Count the length of the patterns in the same way as they are put in
// "command" below.
len++; // add space
for (j = 0; pat[i][j] != NUL; j++) {
if (vim_strchr(SHELL_SPECIAL, pat[i][j]) != NULL) {
len++; // may add a backslash
}
len++;
}
}
if (is_fish_shell) {
len += sizeof("egin;"" end") - 1;
}
command = xmalloc(len);
// Build the shell command:
// - Set $nonomatch depending on EW_NOTFOUND (hopefully the shell
// recognizes this).
// - Add the shell command to print the expanded names.
// - Add the temp file name.
// - Add the file name patterns.
if (shell_style == STYLE_BT) {
// change `command; command& ` to (command; command )
if (is_fish_shell) {
STRCPY(command, "begin; ");
} else {
STRCPY(command, "(");
}
STRCAT(command, pat[0] + 1); // exclude first backtick
p = command + STRLEN(command) - 1;
if (is_fish_shell) {
*p-- = ';';
STRCAT(command, " end");
} else {
*p-- = ')'; // remove last backtick
}
while (p > command && ascii_iswhite(*p)) {
p--;
}
if (*p == '&') { // remove trailing '&'
ampersent = true;
*p = ' ';
}
STRCAT(command, ">");
} else {
if (flags & EW_NOTFOUND)
STRCPY(command, "set nonomatch; ");
else
STRCPY(command, "unset nonomatch; ");
if (shell_style == STYLE_GLOB)
STRCAT(command, "glob >");
else if (shell_style == STYLE_PRINT)
STRCAT(command, "print -N >");
else if (shell_style == STYLE_VIMGLOB)
STRCAT(command, sh_vimglob_func);
else
STRCAT(command, "echo >");
}
STRCAT(command, tempname);
if (shell_style != STYLE_BT) {
for (i = 0; i < num_pat; i++) {
// Put a backslash before special
// characters, except inside ``.
bool intick = false;
p = command + STRLEN(command);
*p++ = ' ';
for (j = 0; pat[i][j] != NUL; j++) {
if (pat[i][j] == '`') {
intick = !intick;
} else if (pat[i][j] == '\\' && pat[i][j + 1] != NUL) {
// Remove a backslash, take char literally. But keep
// backslash inside backticks, before a special character
// and before a backtick.
if (intick
|| vim_strchr(SHELL_SPECIAL, pat[i][j + 1]) != NULL
|| pat[i][j + 1] == '`') {
*p++ = '\\';
}
j++;
} else if (!intick
&& ((flags & EW_KEEPDOLLAR) == 0 || pat[i][j] != '$')
&& vim_strchr(SHELL_SPECIAL, pat[i][j]) != NULL) {
// Put a backslash before a special character, but not
// when inside ``. And not for $var when EW_KEEPDOLLAR is
// set.
*p++ = '\\';
}
// Copy one character.
*p++ = pat[i][j];
}
*p = NUL;
}
}
if (flags & EW_SILENT) {
shellopts |= kShellOptHideMess;
}
if (ampersent) {
STRCAT(command, "&"); // put the '&' after the redirection
}
// Using zsh -G: If a pattern has no matches, it is just deleted from
// the argument list, otherwise zsh gives an error message and doesn't
// expand any other pattern.
if (shell_style == STYLE_PRINT) {
extra_shell_arg = (char_u *)"-G"; // Use zsh NULL_GLOB option
// If we use -f then shell variables set in .cshrc won't get expanded.
// vi can do it, so we will too, but it is only necessary if there is a "$"
// in one of the patterns, otherwise we can still use the fast option.
} else if (shell_style == STYLE_GLOB && !have_dollars(num_pat, pat)) {
extra_shell_arg = (char_u *)"-f"; // Use csh fast option
}
// execute the shell command
i = call_shell(
command,
shellopts,
extra_shell_arg
);
// When running in the background, give it some time to create the temp
// file, but don't wait for it to finish.
if (ampersent) {
os_delay(10L, true);
}
xfree(command);
if (i) { // os_call_shell() failed
os_remove((char *)tempname);
xfree(tempname);
// With interactive completion, the error message is not printed.
if (!(flags & EW_SILENT)) {
msg_putchar('\n'); // clear bottom line quickly
cmdline_row = Rows - 1; // continue on last line
MSG(_(e_wildexpand));
msg_start(); // don't overwrite this message
}
// If a `cmd` expansion failed, don't list `cmd` as a match, even when
// EW_NOTFOUND is given
if (shell_style == STYLE_BT) {
return FAIL;
}
goto notfound;
}
// read the names from the file into memory
fd = fopen((char *)tempname, READBIN);
if (fd == NULL) {
// Something went wrong, perhaps a file name with a special char.
if (!(flags & EW_SILENT)) {
MSG(_(e_wildexpand));
msg_start(); // don't overwrite this message
}
xfree(tempname);
goto notfound;
}
int fseek_res = fseek(fd, 0L, SEEK_END);
if (fseek_res < 0) {
xfree(tempname);
fclose(fd);
return FAIL;
}
int64_t templen = ftell(fd); // get size of temp file
if (templen < 0) {
xfree(tempname);
fclose(fd);
return FAIL;
}
#if SIZEOF_LONG_LONG > SIZEOF_SIZE_T
assert(templen <= (long long)SIZE_MAX);
#endif
len = (size_t)templen;
fseek(fd, 0L, SEEK_SET);
buffer = xmalloc(len + 1);
// fread() doesn't terminate buffer with NUL;
// appropriate termination (not always NUL) is done below.
size_t readlen = fread((char *)buffer, 1, len, fd);
fclose(fd);
os_remove((char *)tempname);
if (readlen != len) {
// unexpected read error
EMSG2(_(e_notread), tempname);
xfree(tempname);
xfree(buffer);
return FAIL;
}
xfree(tempname);
// file names are separated with Space
if (shell_style == STYLE_ECHO) {
buffer[len] = '\n'; // make sure the buffer ends in NL
p = buffer;
for (i = 0; *p != '\n'; i++) { // count number of entries
while (*p != ' ' && *p != '\n') {
p++;
}
p = skipwhite(p); // skip to next entry
}
// file names are separated with NL
} else if (shell_style == STYLE_BT || shell_style == STYLE_VIMGLOB) {
buffer[len] = NUL; // make sure the buffer ends in NUL
p = buffer;
for (i = 0; *p != NUL; i++) { // count number of entries
while (*p != '\n' && *p != NUL) {
p++;
}
if (*p != NUL) {
p++;
}
p = skipwhite(p); // skip leading white space
}
// file names are separated with NUL
} else {
// Some versions of zsh use spaces instead of NULs to separate
// results. Only do this when there is no NUL before the end of the
// buffer, otherwise we would never be able to use file names with
// embedded spaces when zsh does use NULs.
// When we found a NUL once, we know zsh is OK, set did_find_nul and
// don't check for spaces again.
check_spaces = false;
if (shell_style == STYLE_PRINT && !did_find_nul) {
// If there is a NUL, set did_find_nul, else set check_spaces
buffer[len] = NUL;
if (len && (int)STRLEN(buffer) < (int)len)
did_find_nul = true;
else
check_spaces = true;
}
// Make sure the buffer ends with a NUL. For STYLE_PRINT there
// already is one, for STYLE_GLOB it needs to be added.
if (len && buffer[len - 1] == NUL) {
len--;
} else {
buffer[len] = NUL;
}
i = 0;
for (p = buffer; p < buffer + len; p++) {
if (*p == NUL || (*p == ' ' && check_spaces)) { // count entry
i++;
*p = NUL;
}
}
if (len) {
i++; // count last entry
}
}
assert(buffer[len] == NUL || buffer[len] == '\n');
if (i == 0) {
// Can happen when using /bin/sh and typing ":e $NO_SUCH_VAR^I".
// /bin/sh will happily expand it to nothing rather than returning an
// error; and hey, it's good to check anyway -- webb.
xfree(buffer);
goto notfound;
}
*num_file = i;
*file = xmalloc(sizeof(char_u *) * (size_t)i);
// Isolate the individual file names.
p = buffer;
for (i = 0; i < *num_file; ++i) {
(*file)[i] = p;
// Space or NL separates
if (shell_style == STYLE_ECHO || shell_style == STYLE_BT
|| shell_style == STYLE_VIMGLOB) {
while (!(shell_style == STYLE_ECHO && *p == ' ')
&& *p != '\n' && *p != NUL) {
p++;
}
if (p == buffer + len) { // last entry
*p = NUL;
} else {
*p++ = NUL;
p = skipwhite(p); // skip to next entry
}
} else { // NUL separates
while (*p && p < buffer + len) { // skip entry
p++;
}
p++; // skip NUL
}
}
// Move the file names to allocated memory.
for (j = 0, i = 0; i < *num_file; i++) {
// Require the files to exist. Helps when using /bin/sh
if (!(flags & EW_NOTFOUND) && !os_path_exists((*file)[i])) {
continue;
}
// check if this entry should be included
dir = (os_isdir((*file)[i]));
if ((dir && !(flags & EW_DIR)) || (!dir && !(flags & EW_FILE)))
continue;
// Skip files that are not executable if we check for that.
if (!dir && (flags & EW_EXEC)
&& !os_can_exe((char *)(*file)[i], NULL, !(flags & EW_SHELLCMD))) {
continue;
}
p = xmalloc(STRLEN((*file)[i]) + 1 + dir);
STRCPY(p, (*file)[i]);
if (dir) {
add_pathsep((char *)p); // add '/' to a directory name
}
(*file)[j++] = p;
}
xfree(buffer);
*num_file = j;
if (*num_file == 0) { // rejected all entries
XFREE_CLEAR(*file);
goto notfound;
}
return OK;
notfound:
if (flags & EW_NOTFOUND) {
save_patterns(num_pat, pat, num_file, file);
return OK;
}
return FAIL;
}
/// Builds the argument vector for running the user-configured 'shell' (p_sh)
/// with an optional command prefixed by 'shellcmdflag' (p_shcf). E.g.:
///

506
src/nvim/os_unix.c
View File

@ -1,13 +1,6 @@
// This is an open source non-commercial project. Dear PVS-Studio, please check
// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
/*
* os_unix.c -- code for all flavors of Unix (BSD, SYSV, SVR4, POSIX, ...)
*
* A lot of this file was originally written by Juergen Weigert and later
* changed beyond recognition.
*/
#include <assert.h>
#include <errno.h>
#include <inttypes.h>
@ -104,502 +97,3 @@ void mch_exit(int r)
exit(r);
}
#define SHELL_SPECIAL (char_u *)"\t \"&'$;<>()\\|"
/// Does wildcard pattern matching using the shell.
///
/// @param num_pat is the number of input patterns.
/// @param pat is an array of pointers to input patterns.
/// @param[out] num_file is pointer to number of matched file names.
/// Set to the number of pointers in *file.
/// @param[out] file is pointer to array of pointers to matched file names.
/// Memory pointed to by the initial value of *file will
/// not be freed.
/// Set to NULL if FAIL is returned. Otherwise points to
/// allocated memory.
/// @param flags is a combination of EW_* flags used in
/// expand_wildcards().
/// If matching fails but EW_NOTFOUND is set in flags or
/// there are no wildcards, the patterns from pat are
/// copied into *file.
///
/// @returns OK for success or FAIL for error.
int mch_expand_wildcards(int num_pat, char_u **pat, int *num_file,
char_u ***file, int flags) FUNC_ATTR_NONNULL_ARG(3)
FUNC_ATTR_NONNULL_ARG(4)
{
int i;
size_t len;
char_u *p;
bool dir;
char_u *extra_shell_arg = NULL;
ShellOpts shellopts = kShellOptExpand | kShellOptSilent;
int j;
char_u *tempname;
char_u *command;
FILE *fd;
char_u *buffer;
#define STYLE_ECHO 0 /* use "echo", the default */
#define STYLE_GLOB 1 /* use "glob", for csh */
#define STYLE_VIMGLOB 2 /* use "vimglob", for Posix sh */
#define STYLE_PRINT 3 /* use "print -N", for zsh */
#define STYLE_BT 4 /* `cmd` expansion, execute the pattern
* directly */
int shell_style = STYLE_ECHO;
int check_spaces;
static bool did_find_nul = false;
bool ampersent = false;
// vimglob() function to define for Posix shell
static char *sh_vimglob_func =
"vimglob() { while [ $# -ge 1 ]; do echo \"$1\"; shift; done }; vimglob >";
bool is_fish_shell =
#if defined(UNIX)
STRNCMP(invocation_path_tail(p_sh, NULL), "fish", 4) == 0;
#else
false;
#endif
*num_file = 0; // default: no files found
*file = NULL;
// If there are no wildcards, just copy the names to allocated memory.
// Saves a lot of time, because we don't have to start a new shell.
if (!have_wildcard(num_pat, pat)) {
save_patterns(num_pat, pat, num_file, file);
return OK;
}
// Don't allow any shell command in the sandbox.
if (sandbox != 0 && check_secure()) {
return FAIL;
}
// Don't allow the use of backticks in secure and restricted mode.
if (secure || restricted) {
for (i = 0; i < num_pat; i++) {
if (vim_strchr(pat[i], '`') != NULL
&& (check_restricted() || check_secure())) {
return FAIL;
}
}
}
// get a name for the temp file
if ((tempname = vim_tempname()) == NULL) {
EMSG(_(e_notmp));
return FAIL;
}
// Let the shell expand the patterns and write the result into the temp
// file.
// STYLE_BT: NL separated
// If expanding `cmd` execute it directly.
// STYLE_GLOB: NUL separated
// If we use *csh, "glob" will work better than "echo".
// STYLE_PRINT: NL or NUL separated
// If we use *zsh, "print -N" will work better than "glob".
// STYLE_VIMGLOB: NL separated
// If we use *sh*, we define "vimglob()".
// STYLE_ECHO: space separated.
// A shell we don't know, stay safe and use "echo".
if (num_pat == 1 && *pat[0] == '`'
&& (len = STRLEN(pat[0])) > 2
&& *(pat[0] + len - 1) == '`') {
shell_style = STYLE_BT;
} else if ((len = STRLEN(p_sh)) >= 3) {
if (STRCMP(p_sh + len - 3, "csh") == 0) {
shell_style = STYLE_GLOB;
} else if (STRCMP(p_sh + len - 3, "zsh") == 0) {
shell_style = STYLE_PRINT;
}
}
if (shell_style == STYLE_ECHO && strstr((char *)path_tail(p_sh),
"sh") != NULL)
shell_style = STYLE_VIMGLOB;
// Compute the length of the command. We need 2 extra bytes: for the
// optional '&' and for the NUL.
// Worst case: "unset nonomatch; print -N >" plus two is 29
len = STRLEN(tempname) + 29;
if (shell_style == STYLE_VIMGLOB)
len += STRLEN(sh_vimglob_func);
for (i = 0; i < num_pat; i++) {
// Count the length of the patterns in the same way as they are put in
// "command" below.
len++; // add space
for (j = 0; pat[i][j] != NUL; j++) {
if (vim_strchr(SHELL_SPECIAL, pat[i][j]) != NULL) {
len++; // may add a backslash
}
len++;
}
}
if (is_fish_shell) {
len += sizeof("egin;"" end") - 1;
}
command = xmalloc(len);
// Build the shell command:
// - Set $nonomatch depending on EW_NOTFOUND (hopefully the shell
// recognizes this).
// - Add the shell command to print the expanded names.
// - Add the temp file name.
// - Add the file name patterns.
if (shell_style == STYLE_BT) {
// change `command; command& ` to (command; command )
if (is_fish_shell) {
STRCPY(command, "begin; ");
} else {
STRCPY(command, "(");
}
STRCAT(command, pat[0] + 1); // exclude first backtick
p = command + STRLEN(command) - 1;
if (is_fish_shell) {
*p-- = ';';
STRCAT(command, " end");
} else {
*p-- = ')'; // remove last backtick
}
while (p > command && ascii_iswhite(*p)) {
p--;
}
if (*p == '&') { // remove trailing '&'
ampersent = true;
*p = ' ';
}
STRCAT(command, ">");
} else {
if (flags & EW_NOTFOUND)
STRCPY(command, "set nonomatch; ");
else
STRCPY(command, "unset nonomatch; ");
if (shell_style == STYLE_GLOB)
STRCAT(command, "glob >");
else if (shell_style == STYLE_PRINT)
STRCAT(command, "print -N >");
else if (shell_style == STYLE_VIMGLOB)
STRCAT(command, sh_vimglob_func);
else
STRCAT(command, "echo >");
}
STRCAT(command, tempname);
if (shell_style != STYLE_BT) {
for (i = 0; i < num_pat; i++) {
// Put a backslash before special
// characters, except inside ``.
bool intick = false;
p = command + STRLEN(command);
*p++ = ' ';
for (j = 0; pat[i][j] != NUL; j++) {
if (pat[i][j] == '`') {
intick = !intick;
} else if (pat[i][j] == '\\' && pat[i][j + 1] != NUL) {
// Remove a backslash, take char literally. But keep
// backslash inside backticks, before a special character
// and before a backtick.
if (intick
|| vim_strchr(SHELL_SPECIAL, pat[i][j + 1]) != NULL
|| pat[i][j + 1] == '`') {
*p++ = '\\';
}
j++;
} else if (!intick
&& ((flags & EW_KEEPDOLLAR) == 0 || pat[i][j] != '$')
&& vim_strchr(SHELL_SPECIAL, pat[i][j]) != NULL) {
// Put a backslash before a special character, but not
// when inside ``. And not for $var when EW_KEEPDOLLAR is
// set.
*p++ = '\\';
}
// Copy one character.
*p++ = pat[i][j];
}
*p = NUL;
}
}
if (flags & EW_SILENT) {
shellopts |= kShellOptHideMess;
}
if (ampersent) {
STRCAT(command, "&"); // put the '&' after the redirection
}
// Using zsh -G: If a pattern has no matches, it is just deleted from
// the argument list, otherwise zsh gives an error message and doesn't
// expand any other pattern.
if (shell_style == STYLE_PRINT) {
extra_shell_arg = (char_u *)"-G"; // Use zsh NULL_GLOB option
// If we use -f then shell variables set in .cshrc won't get expanded.
// vi can do it, so we will too, but it is only necessary if there is a "$"
// in one of the patterns, otherwise we can still use the fast option.
} else if (shell_style == STYLE_GLOB && !have_dollars(num_pat, pat)) {
extra_shell_arg = (char_u *)"-f"; // Use csh fast option
}
// execute the shell command
i = call_shell(
command,
shellopts,
extra_shell_arg
);
// When running in the background, give it some time to create the temp
// file, but don't wait for it to finish.
if (ampersent) {
os_delay(10L, true);
}
xfree(command);
if (i) { // os_call_shell() failed
os_remove((char *)tempname);
xfree(tempname);
// With interactive completion, the error message is not printed.
if (!(flags & EW_SILENT)) {
msg_putchar('\n'); // clear bottom line quickly
cmdline_row = Rows - 1; // continue on last line
MSG(_(e_wildexpand));
msg_start(); // don't overwrite this message
}
// If a `cmd` expansion failed, don't list `cmd` as a match, even when
// EW_NOTFOUND is given
if (shell_style == STYLE_BT) {
return FAIL;
}
goto notfound;
}
// read the names from the file into memory
fd = fopen((char *)tempname, READBIN);
if (fd == NULL) {
// Something went wrong, perhaps a file name with a special char.
if (!(flags & EW_SILENT)) {
MSG(_(e_wildexpand));
msg_start(); // don't overwrite this message
}
xfree(tempname);
goto notfound;
}
int fseek_res = fseek(fd, 0L, SEEK_END);
if (fseek_res < 0) {
xfree(tempname);
fclose(fd);
return FAIL;
}
int64_t templen = ftell(fd); // get size of temp file
if (templen < 0) {
xfree(tempname);
fclose(fd);
return FAIL;
}
#if SIZEOF_LONG_LONG > SIZEOF_SIZE_T
assert(templen <= (long long)SIZE_MAX);
#endif
len = (size_t)templen;
fseek(fd, 0L, SEEK_SET);
buffer = xmalloc(len + 1);
// fread() doesn't terminate buffer with NUL;
// appropriate termination (not always NUL) is done below.
size_t readlen = fread((char *)buffer, 1, len, fd);
fclose(fd);
os_remove((char *)tempname);
if (readlen != len) {
// unexpected read error
EMSG2(_(e_notread), tempname);
xfree(tempname);
xfree(buffer);
return FAIL;
}
xfree(tempname);
// file names are separated with Space
if (shell_style == STYLE_ECHO) {
buffer[len] = '\n'; // make sure the buffer ends in NL
p = buffer;
for (i = 0; *p != '\n'; i++) { // count number of entries
while (*p != ' ' && *p != '\n') {
p++;
}
p = skipwhite(p); // skip to next entry
}
// file names are separated with NL
} else if (shell_style == STYLE_BT || shell_style == STYLE_VIMGLOB) {
buffer[len] = NUL; // make sure the buffer ends in NUL
p = buffer;
for (i = 0; *p != NUL; i++) { // count number of entries
while (*p != '\n' && *p != NUL) {
p++;
}
if (*p != NUL) {
p++;
}
p = skipwhite(p); // skip leading white space
}
// file names are separated with NUL
} else {
// Some versions of zsh use spaces instead of NULs to separate
// results. Only do this when there is no NUL before the end of the
// buffer, otherwise we would never be able to use file names with
// embedded spaces when zsh does use NULs.
// When we found a NUL once, we know zsh is OK, set did_find_nul and
// don't check for spaces again.
check_spaces = false;
if (shell_style == STYLE_PRINT && !did_find_nul) {
// If there is a NUL, set did_find_nul, else set check_spaces
buffer[len] = NUL;
if (len && (int)STRLEN(buffer) < (int)len)
did_find_nul = true;
else
check_spaces = true;
}
// Make sure the buffer ends with a NUL. For STYLE_PRINT there
// already is one, for STYLE_GLOB it needs to be added.
if (len && buffer[len - 1] == NUL) {
len--;
} else {
buffer[len] = NUL;
}
i = 0;
for (p = buffer; p < buffer + len; p++) {
if (*p == NUL || (*p == ' ' && check_spaces)) { // count entry
i++;
*p = NUL;
}
}
if (len) {
i++; // count last entry
}
}
assert(buffer[len] == NUL || buffer[len] == '\n');
if (i == 0) {
// Can happen when using /bin/sh and typing ":e $NO_SUCH_VAR^I".
// /bin/sh will happily expand it to nothing rather than returning an
// error; and hey, it's good to check anyway -- webb.
xfree(buffer);
goto notfound;
}
*num_file = i;
*file = xmalloc(sizeof(char_u *) * (size_t)i);
// Isolate the individual file names.
p = buffer;
for (i = 0; i < *num_file; ++i) {
(*file)[i] = p;
// Space or NL separates
if (shell_style == STYLE_ECHO || shell_style == STYLE_BT
|| shell_style == STYLE_VIMGLOB) {
while (!(shell_style == STYLE_ECHO && *p == ' ')
&& *p != '\n' && *p != NUL) {
p++;
}
if (p == buffer + len) { // last entry
*p = NUL;
} else {
*p++ = NUL;
p = skipwhite(p); // skip to next entry
}
} else { // NUL separates
while (*p && p < buffer + len) { // skip entry
p++;
}
p++; // skip NUL
}
}
// Move the file names to allocated memory.
for (j = 0, i = 0; i < *num_file; i++) {
// Require the files to exist. Helps when using /bin/sh
if (!(flags & EW_NOTFOUND) && !os_path_exists((*file)[i])) {
continue;
}
// check if this entry should be included
dir = (os_isdir((*file)[i]));
if ((dir && !(flags & EW_DIR)) || (!dir && !(flags & EW_FILE)))
continue;
// Skip files that are not executable if we check for that.
if (!dir && (flags & EW_EXEC)
&& !os_can_exe((char *)(*file)[i], NULL, !(flags & EW_SHELLCMD))) {
continue;
}
p = xmalloc(STRLEN((*file)[i]) + 1 + dir);
STRCPY(p, (*file)[i]);
if (dir) {
add_pathsep((char *)p); // add '/' to a directory name
}
(*file)[j++] = p;
}
xfree(buffer);
*num_file = j;
if (*num_file == 0) { // rejected all entries
XFREE_CLEAR(*file);
goto notfound;
}
return OK;
notfound:
if (flags & EW_NOTFOUND) {
save_patterns(num_pat, pat, num_file, file);
return OK;
}
return FAIL;
}
static void save_patterns(int num_pat, char_u **pat, int *num_file,
char_u ***file)
{
int i;
char_u *s;
*file = xmalloc((size_t)num_pat * sizeof(char_u *));
for (i = 0; i < num_pat; i++) {
s = vim_strsave(pat[i]);
// Be compatible with expand_filename(): halve the number of
// backslashes.
backslash_halve(s);
(*file)[i] = s;
}
*num_file = num_pat;
}
static bool have_wildcard(int num, char_u **file)
{
int i;
for (i = 0; i < num; i++)
if (path_has_wildcard(file[i]))
return true;
return false;
}
static bool have_dollars(int num, char_u **file)
{
int i;
for (i = 0; i < num; i++)
if (vim_strchr(file[i], '$') != NULL)
return true;
return false;
}

8
src/nvim/path.c
View File

@ -1178,7 +1178,7 @@ int gen_expand_wildcards(int num_pat, char_u **pat, int *num_file,
*/
if (recursive)
#ifdef SPECIAL_WILDCHAR
return mch_expand_wildcards(num_pat, pat, num_file, file, flags);
return os_expand_wildcards(num_pat, pat, num_file, file, flags);
#else
return FAIL;
#endif
@ -1193,7 +1193,7 @@ int gen_expand_wildcards(int num_pat, char_u **pat, int *num_file,
for (int i = 0; i < num_pat; i++) {
if (has_special_wildchar(pat[i])
&& !(vim_backtick(pat[i]) && pat[i][1] == '=')) {
return mch_expand_wildcards(num_pat, pat, num_file, file, flags);
return os_expand_wildcards(num_pat, pat, num_file, file, flags);
}
}
#endif
@ -1233,8 +1233,8 @@ int gen_expand_wildcards(int num_pat, char_u **pat, int *num_file,
else if (has_env_var(p) || *p == '~') {
xfree(p);
ga_clear_strings(&ga);
i = mch_expand_wildcards(num_pat, pat, num_file, file,
flags | EW_KEEPDOLLAR);
i = os_expand_wildcards(num_pat, pat, num_file, file,
flags | EW_KEEPDOLLAR);
recursive = false;
return i;
}