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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-09-24 18:27:04 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-09-24 18:27:04 +0000
commit818322b9b19a452d66a07ca69256e2c092f5db5f (patch)
tree0b34390ac0cd61951bb9dc5b9fd3a226dae4f1ef
parenta7ce207bd82882d6436d256a73c42ca4c8500ff3 (diff)
downloadbusybox-818322b9b19a452d66a07ca69256e2c092f5db5f.tar.gz
busybox-818322b9b19a452d66a07ca69256e2c092f5db5f.tar.bz2
*: kill bb_get_last_path_component, replace with two functions
(one which strips trailing slash and one which does not) wget: straighten out as a result of above change text data bss dec hex filename 5056 1 0 5057 13c1 busybox.t4/networking/wget.o 5022 0 0 5022 139e busybox.t5/networking/wget.o
-rw-r--r--applets/applets.c2
-rw-r--r--coreutils/basename.c3
-rw-r--r--coreutils/cp.c2
-rw-r--r--coreutils/ln.c4
-rw-r--r--coreutils/mv.c2
-rw-r--r--coreutils/rm.c2
-rw-r--r--include/libbb.h12
-rw-r--r--init/init.c5
-rw-r--r--libbb/get_last_path_component.c42
-rw-r--r--libbb/run_shell.c2
-rw-r--r--modutils/insmod.c2
-rw-r--r--networking/wget.c45
-rw-r--r--shell/lash.c5
13 files changed, 66 insertions, 62 deletions
diff --git a/applets/applets.c b/applets/applets.c
index a1a399cd5..5b7b88a54 100644
--- a/applets/applets.c
+++ b/applets/applets.c
@@ -601,7 +601,7 @@ static int busybox_main(char **argv)
}
/* We support "busybox /a/path/to/applet args..." too. Allows for
* "#!/bin/busybox"-style wrappers */
- applet_name = bb_get_last_path_component(argv[0]);
+ applet_name = bb_get_last_path_component_nostrip(argv[0]);
run_applet_and_exit(applet_name, argv);
bb_error_msg_and_die("applet not found");
}
diff --git a/coreutils/basename.c b/coreutils/basename.c
index f59d7a8de..ec1f85bef 100644
--- a/coreutils/basename.c
+++ b/coreutils/basename.c
@@ -34,7 +34,8 @@ int basename_main(int argc, char **argv)
bb_show_usage();
}
- s = bb_get_last_path_component(*++argv);
+ /* It should strip slash: /abc/def/ -> def */
+ s = bb_get_last_path_component_strip(*++argv);
if (*++argv) {
n = strlen(*argv);
diff --git a/coreutils/cp.c b/coreutils/cp.c
index 76dc566b3..889e4604d 100644
--- a/coreutils/cp.c
+++ b/coreutils/cp.c
@@ -87,7 +87,7 @@ int cp_main(int argc, char **argv)
}
while (1) {
- dest = concat_path_file(last, bb_get_last_path_component(*argv));
+ dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
DO_COPY:
if (copy_file(*argv, dest, flags) < 0) {
status = 1;
diff --git a/coreutils/ln.c b/coreutils/ln.c
index a6499039e..f3c67aa36 100644
--- a/coreutils/ln.c
+++ b/coreutils/ln.c
@@ -45,7 +45,7 @@ int ln_main(int argc, char **argv)
if (argc == optind + 1) {
*--argv = last;
- last = bb_get_last_path_component(xstrdup(last));
+ last = bb_get_last_path_component_strip(xstrdup(last));
}
do {
@@ -57,7 +57,7 @@ int ln_main(int argc, char **argv)
NULL)
) {
src_name = xstrdup(*argv);
- src = concat_path_file(src, bb_get_last_path_component(src_name));
+ src = concat_path_file(src, bb_get_last_path_component_strip(src_name));
free(src_name);
src_name = src;
}
diff --git a/coreutils/mv.c b/coreutils/mv.c
index 1d2977060..d13f4d54f 100644
--- a/coreutils/mv.c
+++ b/coreutils/mv.c
@@ -68,7 +68,7 @@ int mv_main(int argc, char **argv)
}
do {
- dest = concat_path_file(last, bb_get_last_path_component(*argv));
+ dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
dest_exists = cp_mv_stat(dest, &dest_stat);
if (dest_exists < 0) {
goto RET_1;
diff --git a/coreutils/rm.c b/coreutils/rm.c
index ba37762a8..a686fc40c 100644
--- a/coreutils/rm.c
+++ b/coreutils/rm.c
@@ -38,7 +38,7 @@ int rm_main(int argc, char **argv)
if (*argv != NULL) {
do {
- const char *base = bb_get_last_path_component(*argv);
+ const char *base = bb_get_last_path_component_strip(*argv);
if (DOT_OR_DOTDOT(base)) {
bb_error_msg("cannot remove '.' or '..'");
diff --git a/include/libbb.h b/include/libbb.h
index e5f03517f..25b2e4489 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -236,9 +236,15 @@ extern void bb_copyfd_exact_size(int fd1, int fd2, off_t size);
/* this helper yells "short read!" if param is not -1 */
extern void complain_copyfd_and_die(off_t sz) ATTRIBUTE_NORETURN;
extern char bb_process_escape_sequence(const char **ptr);
-/* TODO: sometimes modifies its parameter, which
- * makes it rather inconvenient at times: */
-extern char *bb_get_last_path_component(char *path);
+/* xxxx_strip version can modify its parameter:
+ * "/" -> "/"
+ * "abc" -> "abc"
+ * "abc/def" -> "def"
+ * "abc/def/" -> "def" !!
+ */
+extern char *bb_get_last_path_component_strip(char *path);
+/* "abc/def/" -> "" and it never modifies 'path' */
+extern char *bb_get_last_path_component_nostrip(const char *path);
int ndelay_on(int fd);
int ndelay_off(int fd);
diff --git a/init/init.c b/init/init.c
index a196ab3ed..543ec2ea8 100644
--- a/init/init.c
+++ b/init/init.c
@@ -436,10 +436,11 @@ static pid_t run(const struct init_action *a)
++cmdpath;
/* find the last component in the command pathname */
- s = bb_get_last_path_component(cmdpath);
+ s = bb_get_last_path_component_nostrip(cmdpath);
/* make a new argv[0] */
- if ((cmd[0] = malloc(strlen(s) + 2)) == NULL) {
+ cmd[0] = malloc(strlen(s) + 2);
+ if (cmd[0] == NULL) {
message(L_LOG | L_CONSOLE, bb_msg_memory_exhausted);
cmd[0] = cmdpath;
} else {
diff --git a/libbb/get_last_path_component.c b/libbb/get_last_path_component.c
index b7bc0e626..0f602157d 100644
--- a/libbb/get_last_path_component.c
+++ b/libbb/get_last_path_component.c
@@ -8,25 +8,35 @@
*/
#include "libbb.h"
-
-char *bb_get_last_path_component(char *path)
+/*
+ * "/" -> "/"
+ * "abc" -> "abc"
+ * "abc/def" -> "def"
+ * "abc/def/" -> ""
+ */
+char *bb_get_last_path_component_nostrip(const char *path)
{
- char *first = path;
- char *last;
+ char *slash = strrchr(path, '/');
+
+ if (!slash || (slash == path && !slash[1]))
+ return (char*)path;
- last = path - 1;
+ return slash + 1;
+}
- while (*path) {
- if ((*path != '/') && (path > ++last)) {
- last = first = path;
- }
- ++path;
- }
+/*
+ * "/" -> "/"
+ * "abc" -> "abc"
+ * "abc/def" -> "def"
+ * "abc/def/" -> "def" !!
+ */
+char *bb_get_last_path_component_strip(char *path)
+{
+ char *slash = last_char_is(path, '/');
- if (*first == '/') {
- last = first;
- }
- last[1] = '\0';
+ if (slash)
+ while (*slash == '/' && slash != path)
+ *slash-- = '\0';
- return first;
+ return bb_get_last_path_component_nostrip(path);
}
diff --git a/libbb/run_shell.c b/libbb/run_shell.c
index b2b4216f4..239887d85 100644
--- a/libbb/run_shell.c
+++ b/libbb/run_shell.c
@@ -67,7 +67,7 @@ void run_shell(const char *shell, int loginshell, const char *command, const cha
args = xmalloc(sizeof(char*) * (4 + additional_args_cnt));
- args[0] = bb_get_last_path_component(xstrdup(shell));
+ args[0] = bb_get_last_path_component_nostrip(xstrdup(shell));
if (loginshell)
args[0] = xasprintf("-%s", args[0]);
diff --git a/modutils/insmod.c b/modutils/insmod.c
index 503367298..0baf5d7f2 100644
--- a/modutils/insmod.c
+++ b/modutils/insmod.c
@@ -806,7 +806,7 @@ static int check_module_name_match(const char *filename, struct stat *statbuf,
return FALSE;
else {
char *tmp, *tmp1 = xstrdup(filename);
- tmp = bb_get_last_path_component(tmp1);
+ tmp = bb_get_last_path_component_nostrip(tmp1);
if (strcmp(tmp, fullname) == 0) {
free(tmp1);
/* Stop searching if we find a match */
diff --git a/networking/wget.c b/networking/wget.c
index 5feb539d5..86d6f00ec 100644
--- a/networking/wget.c
+++ b/networking/wget.c
@@ -12,11 +12,11 @@
struct host_info {
// May be used if we ever will want to free() all xstrdup()s...
/* char *allocated; */
- char *path;
- char *user;
- char *host;
- int port;
- smallint is_ftp;
+ const char *path;
+ const char *user;
+ char *host;
+ int port;
+ smallint is_ftp;
};
@@ -318,9 +318,7 @@ static void parse_url(char *src_url, struct host_info *h)
p = strchr(h->host, '?'); if (!sp || (p && sp > p)) sp = p;
p = strchr(h->host, '#'); if (!sp || (p && sp > p)) sp = p;
if (!sp) {
- /* must be writable because of bb_get_last_path_component() */
- static char nullstr[] ALIGN1 = "";
- h->path = nullstr;
+ h->path = "";
} else if (*sp == '/') {
*sp = '\0';
h->path = sp + 1;
@@ -328,7 +326,7 @@ static void parse_url(char *src_url, struct host_info *h)
// http://busybox.net?login=john@doe is a valid URL
// memmove converts to:
// http:/busybox.nett?login=john@doe...
- memmove(h->host-1, h->host, sp - h->host);
+ memmove(h->host - 1, h->host, sp - h->host);
h->host--;
sp[-1] = '\0';
h->path = sp;
@@ -497,31 +495,20 @@ int wget_main(int argc, char **argv)
}
}
- /* Guess an output filename */
+ /* Guess an output filename, if there was no -O FILE */
if (!fname_out) {
- // Dirty hack. Needed because bb_get_last_path_component
- // will destroy trailing / by storing '\0' in last byte!
- if (!last_char_is(target.path, '/')) {
- fname_out = bb_get_last_path_component(target.path);
-#if ENABLE_FEATURE_WGET_STATUSBAR
- curfile = fname_out;
-#endif
- }
- if (!fname_out || !fname_out[0]) {
- /* bb_get_last_path_component writes
- * to last '/' only. We don't have one here... */
+ fname_out = bb_get_last_path_component_nostrip(target.path);
+ /* handle "wget http://kernel.org//" */
+ if (fname_out[0] == '/' || !fname_out[0])
fname_out = (char*)"index.html";
-#if ENABLE_FEATURE_WGET_STATUSBAR
- curfile = fname_out;
-#endif
- }
- if (dir_prefix != NULL)
+ /* -P DIR is considered only if there was no -O FILE */
+ if (dir_prefix)
fname_out = concat_path_file(dir_prefix, fname_out);
+ }
#if ENABLE_FEATURE_WGET_STATUSBAR
- } else {
- curfile = bb_get_last_path_component(fname_out);
+ curfile = bb_get_last_path_component_nostrip(fname_out);
#endif
- }
+
/* Impossible?
if ((opt & WGET_OPT_CONTINUE) && !fname_out)
bb_error_msg_and_die("cannot specify continue (-c) without a filename (-O)"); */
diff --git a/shell/lash.c b/shell/lash.c
index d4dba8e63..889fe49d8 100644
--- a/shell/lash.c
+++ b/shell/lash.c
@@ -1141,12 +1141,11 @@ static int pseudo_exec(struct child_prog *child)
}
}
-
/* Check if the command matches any busybox internal
* commands ("applets") here. Following discussions from
* November 2000 on busybox@busybox.net, don't use
- * bb_get_last_path_component(). This way explicit (with
- * slashes) filenames will never be interpreted as an
+ * bb_get_last_path_component_nostrip(). This way explicit
+ * (with slashes) filenames will never be interpreted as an
* applet, just like with builtins. This way the user can
* override an applet with an explicit filename reference.
* The only downside to this change is that an explicit