Bring back the cd -L and -P options from revision 1.24, but try harder not
to fail when the logical current directory no longer exists. Allow changes to absolute paths when logical cwd is invalid, fall back to physical cd if logical cd fails.
This commit is contained in:
parent
baf3e7c14b
commit
09086b0499
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=97092
140
bin/sh/cd.c
140
bin/sh/cd.c
@ -67,25 +67,47 @@ static const char rcsid[] =
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#include "show.h"
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#include "cd.h"
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STATIC int docd(char *, int);
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STATIC int cdlogical(char *);
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STATIC int cdphysical(char *);
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STATIC int docd(char *, int, int);
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STATIC char *getcomponent(void);
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STATIC void updatepwd(char *);
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STATIC int updatepwd(char *);
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char *curdir = NULL; /* current working directory */
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char *prevdir; /* previous working directory */
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STATIC char *cdcomppath;
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int
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cdcmd(int argc __unused, char **argv __unused)
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cdcmd(int argc, char **argv)
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{
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char *dest;
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char *path;
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char *p;
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struct stat statb;
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int print = 0;
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int ch, phys, print = 0;
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nextopt(nullstr);
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if ((dest = *argptr) == NULL && (dest = bltinlookup("HOME", 1)) == NULL)
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optreset = 1; optind = 1; /* initialize getopt */
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phys = 0;
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while ((ch = getopt(argc, argv, "LP")) != -1) {
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switch (ch) {
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case 'L':
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phys = 0;
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break;
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case 'P':
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phys = 1;
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break;
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default:
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error("unknown option: -%c", optopt);
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break;
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}
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}
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argc -= optind;
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argv += optind;
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if (argc > 1)
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error("too many arguments");
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if ((dest = *argv) == NULL && (dest = bltinlookup("HOME", 1)) == NULL)
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error("HOME not set");
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if (*dest == '\0')
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dest = ".";
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@ -108,9 +130,8 @@ cdcmd(int argc __unused, char **argv __unused)
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p += 2;
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print = strcmp(p, dest);
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}
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if (docd(p, print) >= 0)
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if (docd(p, print, phys) >= 0)
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return 0;
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}
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}
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error("can't cd to %s", dest);
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@ -120,11 +141,27 @@ cdcmd(int argc __unused, char **argv __unused)
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/*
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* Actually do the chdir. In an interactive shell, print the
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* Actually change the directory. In an interactive shell, print the
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* directory name if "print" is nonzero.
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*/
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STATIC int
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docd(char *dest, int print)
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docd(char *dest, int print, int phys)
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{
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TRACE(("docd(\"%s\", %d, %d) called\n", dest, print, phys));
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/* If logical cd fails, fall back to physical. */
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if ((phys || cdlogical(dest) < 0) && cdphysical(dest) < 0)
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return (-1);
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if (print && iflag && curdir)
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out1fmt("%s\n", curdir);
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return 0;
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}
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STATIC int
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cdlogical(char *dest)
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{
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char *p;
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char *q;
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@ -133,8 +170,6 @@ docd(char *dest, int print)
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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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@ -161,26 +196,33 @@ docd(char *dest, int print)
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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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if (lstat(stackblock(), &statb) < 0) {
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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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if (updatepwd(badstat ? NULL : dest) < 0 || chdir(curdir) < 0) {
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INTON;
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return -1;
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return (-1);
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}
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updatepwd(badstat ? NULL : dest);
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INTON;
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if (print && iflag && curdir)
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out1fmt("%s\n", curdir);
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return 0;
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return (0);
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}
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STATIC int
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cdphysical(char *dest)
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{
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INTOFF;
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if (chdir(dest) < 0 || updatepwd(NULL) < 0) {
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INTON;
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return (-1);
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}
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INTON;
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return (0);
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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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@ -212,7 +254,7 @@ getcomponent(void)
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* cd command. We also call hashcd to let the routines in exec.c know
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* that the current directory has changed.
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*/
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STATIC void
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STATIC int
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updatepwd(char *dir)
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{
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char *new;
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@ -231,12 +273,14 @@ updatepwd(char *dir)
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INTOFF;
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prevdir = curdir;
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curdir = NULL;
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if (getpwd() == NULL)
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error("getcwd() failed: %s", strerror(errno));
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if (getpwd() == NULL) {
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INTON;
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return (-1);
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}
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setvar("PWD", curdir, VEXPORT);
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setvar("OLDPWD", prevdir, VEXPORT);
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INTON;
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return;
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return (0);
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}
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cdcomppath = stalloc(strlen(dir) + 1);
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scopy(dir, cdcomppath);
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@ -268,24 +312,52 @@ updatepwd(char *dir)
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setvar("PWD", curdir, VEXPORT);
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setvar("OLDPWD", prevdir, VEXPORT);
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INTON;
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return (0);
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}
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#define MAXPWD 256
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int
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pwdcmd(int argc __unused, char **argv __unused)
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{
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if (!getpwd())
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error("getcwd() failed: %s", strerror(errno));
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out1str(curdir);
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out1c('\n');
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char buf[MAXPWD];
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int ch, phys;
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optreset = 1; optind = 1; /* initialize getopt */
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phys = 0;
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while ((ch = getopt(argc, argv, "LP")) != -1) {
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switch (ch) {
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case 'L':
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phys = 0;
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break;
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case 'P':
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phys = 1;
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break;
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default:
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error("unknown option: -%c", optopt);
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break;
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 0)
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error("too many arguments");
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if (!phys && getpwd()) {
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out1str(curdir);
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out1c('\n');
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} else {
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if (getcwd(buf, sizeof(buf)) == NULL)
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error(".: %s", strerror(errno));
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out1str(buf);
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out1c('\n');
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}
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return 0;
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}
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#define MAXPWD 256
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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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