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https://github.com/sheumann/hush.git
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Patch from vodz:
1) complete true: $ > /tmp/tmpfile
2) the builtin pwd now does not unwrap symlinks
3) reduce 680 bytes
This commit is contained in:
Eric Andersen
parent
3cd2760ba1
commit
a3483db55f
163
shell/ash.c
163
shell/ash.c
@ -1556,9 +1556,7 @@ static int hashcmd (int, char **);
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static int helpcmd (int, char **);
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static int jobscmd (int, char **);
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static int localcmd (int, char **);
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#ifndef CONFIG_PWD
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static int pwdcmd (int, char **);
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#endif
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static int readcmd (int, char **);
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static int returncmd (int, char **);
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static int setcmd (int, char **);
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@ -1653,9 +1651,7 @@ static const struct builtincmd builtincmds[] = {
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{ BUILTIN_REGULAR "let", letcmd },
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#endif
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{ BUILTIN_ASSIGN "local", localcmd },
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#ifndef CONFIG_PWD
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{ BUILTIN_NOSPEC "pwd", pwdcmd },
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#endif
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{ BUILTIN_REGULAR "read", readcmd },
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{ BUILTIN_SPEC_ASSG "readonly", exportcmd },
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{ BUILTIN_SPECIAL "return", returncmd },
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@ -1736,7 +1732,6 @@ static int forkshell (struct job *, const union node *, int);
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static int waitforjob (struct job *);
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static int docd (char *, int);
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static char *getcomponent (void);
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static void updatepwd (const char *);
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static void getpwd (void);
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@ -1744,7 +1739,6 @@ static char *padvance (const char **, const char *);
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static char nullstr[1]; /* zero length string */
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static char *curdir = nullstr; /* current working directory */
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static char *cdcomppath;
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static int
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cdcmd(argc, argv)
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@ -1801,58 +1795,15 @@ cdcmd(argc, argv)
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*/
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static int
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docd(dest, print)
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char *dest;
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int print;
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docd(char *dest, int print)
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{
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char *p;
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char *q;
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char *component;
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struct stat statb;
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int first;
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int badstat;
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TRACE(("docd(\"%s\", %d) called\n", dest, print));
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/*
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* Check each component of the path. If we find a symlink or
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* something we can't stat, clear curdir to force a getcwd()
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* next time we get the value of the current directory.
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*/
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badstat = 0;
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cdcomppath = sstrdup(dest);
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STARTSTACKSTR(p);
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if (*dest == '/') {
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STPUTC('/', p);
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cdcomppath++;
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}
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first = 1;
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while ((q = getcomponent()) != NULL) {
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if (q[0] == '\0' || (q[0] == '.' && q[1] == '\0'))
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continue;
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if (! first)
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STPUTC('/', p);
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first = 0;
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component = q;
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while (*q)
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STPUTC(*q++, p);
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if (equal(component, ".."))
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continue;
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STACKSTRNUL(p);
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if ((lstat(stackblock(), &statb) < 0)
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|| (S_ISLNK(statb.st_mode))) {
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/* print = 1; */
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badstat = 1;
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break;
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}
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}
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INTOFF;
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if (chdir(dest) < 0) {
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INTON;
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return -1;
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}
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updatepwd(badstat ? NULL : dest);
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updatepwd(dest);
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INTON;
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if (print && iflag)
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printf(snlfmt, curdir);
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@ -1860,32 +1811,6 @@ docd(dest, print)
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}
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/*
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* Get the next component of the path name pointed to by cdcomppath.
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* This routine overwrites the string pointed to by cdcomppath.
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*/
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static char *
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getcomponent() {
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char *p;
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char *start;
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if ((p = cdcomppath) == NULL)
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return NULL;
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start = cdcomppath;
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while (*p != '/' && *p != '\0')
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p++;
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if (*p == '\0') {
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cdcomppath = NULL;
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} else {
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*p++ = '\0';
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cdcomppath = p;
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}
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return start;
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}
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/*
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* Update curdir (the name of the current directory) in response to a
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* cd command. We also call hashcd to let the routines in exec.c know
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@ -1897,62 +1822,25 @@ static void hashcd (void);
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static void
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updatepwd(const char *dir)
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{
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char *new;
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char *p;
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size_t len;
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hashcd(); /* update command hash table */
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/*
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* If our argument is NULL, we don't know the current directory
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* any more because we traversed a symbolic link or something
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* we couldn't stat().
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*/
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/* If our argument is NULL, we don't know the current directory */
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if (dir == NULL || curdir == nullstr) {
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setpwd(0, 1);
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return;
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}
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len = strlen(dir);
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cdcomppath = sstrdup(dir);
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STARTSTACKSTR(new);
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if (*dir != '/') {
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p = curdir;
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while (*p)
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STPUTC(*p++, new);
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if (p[-1] == '/')
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STUNPUTC(new);
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}
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while ((p = getcomponent()) != NULL) {
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if (equal(p, "..")) {
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while (new > stackblock() && (STUNPUTC(new), *new) != '/');
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} else if (*p != '\0' && ! equal(p, ".")) {
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STPUTC('/', new);
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while (*p)
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STPUTC(*p++, new);
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}
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}
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if (new == stackblock())
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STPUTC('/', new);
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STACKSTRNUL(new);
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setpwd(stackblock(), 1);
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setpwd(dir, 1);
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}
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#ifndef CONFIG_PWD
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static int
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pwdcmd(argc, argv)
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int argc;
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char **argv;
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pwdcmd(int argc, char **argv)
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{
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printf(snlfmt, curdir);
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return 0;
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}
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#endif
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/*
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* Find out what the current directory is. If we already know the current
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* directory, this routine returns immediately.
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*/
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/* Ask system the current directory */
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static void
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getpwd(void)
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{
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@ -1964,19 +1852,22 @@ getpwd(void)
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static void
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setpwd(const char *val, int setold)
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{
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char *cated = NULL;
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if (setold) {
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setvar("OLDPWD", curdir, VEXPORT);
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}
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INTOFF;
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if (curdir != nullstr) {
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if(val!=NULL && *val != '/')
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val = cated = concat_path_file(curdir, val);
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free(curdir);
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curdir = nullstr;
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}
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if (!val) {
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if (!val)
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getpwd();
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} else {
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curdir = savestr(val);
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}
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else
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curdir = simplify_path(val);
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free(cated);
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INTON;
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setvar("PWD", curdir, VEXPORT);
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}
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@ -5950,6 +5841,7 @@ init(void) {
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/* from cd.c: */
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{
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curdir = nullstr;
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setpwd(0, 0);
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}
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@ -7939,7 +7831,6 @@ readcmdfile(const char *name)
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* search for the file, which is necessary to find sub-commands.
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*/
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static inline char *
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find_dot_file(char *mybasename)
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{
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@ -9633,7 +9524,7 @@ static union node *list (int);
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static union node *andor (void);
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static union node *pipeline (void);
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static union node *command (void);
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static union node *simplecmd (void);
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static union node *simplecmd(union node **rpp, union node *redir);
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static void parsefname (void);
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static void parseheredoc (void);
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static char peektoken (void);
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@ -9816,7 +9707,7 @@ pipeline() {
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static union node *
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command() {
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command(void) {
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union node *n1, *n2;
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union node *ap, **app;
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union node *cp, **cpp;
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@ -10005,7 +9896,7 @@ TRACE(("expecting DO got %s %s\n", tokname(got), got == TWORD ? wordtext : ""));
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synexpect(-1);
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case TWORD:
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tokpushback++;
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n1 = simplecmd();
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n1 = simplecmd(rpp, redir);
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return n1;
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default:
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synexpect(-1);
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@ -10035,18 +9926,25 @@ TRACE(("expecting DO got %s %s\n", tokname(got), got == TWORD ? wordtext : ""));
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static union node *
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simplecmd() {
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simplecmd(union node **rpp, union node *redir) {
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union node *args, **app;
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union node *n = NULL;
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union node *vars, **vpp;
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union node **rpp, *redir;
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union node **orig_rpp;
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args = NULL;
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app = &args;
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vars = NULL;
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vpp = &vars;
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redir = NULL;
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/* If we don't have any redirections already, then we must reset
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rpp to be the address of the local redir variable. */
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if (redir == 0)
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rpp = &redir;
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/* We save the incoming value, because we need this for shell
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functions. There can not be a redirect or an argument between
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the function name and the open parenthesis. */
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orig_rpp = rpp;
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checkalias = 2;
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for (;;) {
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@ -10073,7 +9971,7 @@ simplecmd() {
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case TLP:
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if (
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args && app == &args->narg.next &&
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!vars && !redir
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!vars && rpp == orig_rpp
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) {
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/* We have a function */
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if (readtoken() != TRP)
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@ -10459,7 +10357,6 @@ breakloop:
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}
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#endif
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/*
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* If eofmark is NULL, read a word or a redirection symbol. If eofmark
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* is not NULL, read a here document. In the latter case, eofmark is the
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@ -12730,7 +12627,7 @@ findvar(struct var **vpp, const char *name)
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/*
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* Copyright (c) 1999 Herbert Xu <herbert@debian.org>
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* This file contains code for the times builtin.
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* $Id: ash.c,v 1.29 2001/10/24 05:00:16 andersen Exp $
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* $Id: ash.c,v 1.30 2001/10/24 08:01:06 andersen Exp $
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*/
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static int timescmd (int argc, char **argv)
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{
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