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authorPavel Roskin <proski@gnu.org>2000-06-05 23:41:27 +0000
committerPavel Roskin <proski@gnu.org>2000-06-05 23:41:27 +0000
commitc389d9118152e45303173c221a33a8083e769884 (patch)
treedb75949ed22190763981c4b19752e6450723fd8f
parent82c0ac7e4f2def7ebc7110fa817ce534094af2a2 (diff)
downloadbusybox-c389d9118152e45303173c221a33a8083e769884.tar.gz
"which" rewritten to use stat(). Fixes to improve its compatability
with traditional implementations
-rw-r--r--Changelog2
-rw-r--r--findutils/which.c63
-rw-r--r--which.c63
3 files changed, 92 insertions, 36 deletions
diff --git a/Changelog b/Changelog
index 004bca46c..57b936e7c 100644
--- a/Changelog
+++ b/Changelog
@@ -50,6 +50,8 @@
* Fixed all fatalError() calls lacking a "\n", thanks to Pavel Roskin.
* Fixed a segfault in yes when no args were given -- Pavel Roskin.
* Simplified freeramdisk and added argument checking -- Pavel Roskin.
+ * "which" rewritten to use stat(). Fixes to improve its compatability
+ with traditional implementations -- Pavel Roskin.
* More doc updates
diff --git a/findutils/which.c b/findutils/which.c
index 46c2204a5..7a11bf787 100644
--- a/findutils/which.c
+++ b/findutils/which.c
@@ -23,15 +23,18 @@
#include "internal.h"
#include <stdio.h>
-#include <dirent.h>
+#include <sys/stat.h>
+#include <sys/param.h>
extern int which_main(int argc, char **argv)
{
- char *path_list, *test, *tmp;
- struct dirent *next;
+ char *path_list, *test, *tmp, *path_parsed;
+ char buf[PATH_MAX];
+ struct stat filestat;
+ int count = 0;
- if (**(argv + 1) == '-') {
+ if (argc <= 1 || **(argv + 1) == '-') {
usage("which [COMMAND ...]\n"
#ifndef BB_FEATURE_TRIVIAL_HELP
"\nLocates a COMMAND.\n"
@@ -44,21 +47,45 @@ extern int which_main(int argc, char **argv)
if (!path_list)
path_list = "/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin";
- while(argc-- > 0 && *(argv++) != '\0' && strlen(*argv)) {
- for( test=path_list; (tmp=strchr(test, ':')) && (tmp+1)!=NULL; test=++tmp) {
- DIR *dir;
- *tmp='\0';
- //printf("Checking directory '%s'\n", test);
- dir = opendir(test);
- if (!dir)
- continue;
- while ((next = readdir(dir)) != NULL) {
- //printf("Checking file '%s'\n", next->d_name);
- if ((strcmp(next->d_name, *argv) == 0)) {
- printf("%s/%s\n", test, next->d_name);
- exit(TRUE);
- }
+ path_parsed = malloc (strlen(path_list) + 1);
+ strcpy (path_parsed, path_list);
+
+ /* Replace colons with zeros in path_parsed and count them */
+ count = 1;
+ test = path_parsed;
+ while (1) {
+ tmp = strchr(test, ':');
+ if (tmp == NULL)
+ break;
+ *tmp = 0;
+ test = tmp + 1;
+ count++;
+ }
+
+
+ while(argc-- > 0) {
+ int i;
+ int found = FALSE;
+ test = path_parsed;
+ argv++;
+ for (i = 0; i < count; i++) {
+ strcpy (buf, test);
+ strcat (buf, "/");
+ strcat (buf, *argv);
+ if (stat (buf, &filestat) == 0
+ && filestat.st_mode & S_IXUSR)
+ {
+ found = TRUE;
+ break;
}
+ test += (strlen(test) + 1);
+ }
+ if (found == TRUE)
+ printf ("%s\n", buf);
+ else
+ {
+ printf ("which: no %s in (%s)\n", *argv, path_list);
+ exit (FALSE);
}
}
exit(TRUE);
diff --git a/which.c b/which.c
index 46c2204a5..7a11bf787 100644
--- a/which.c
+++ b/which.c
@@ -23,15 +23,18 @@
#include "internal.h"
#include <stdio.h>
-#include <dirent.h>
+#include <sys/stat.h>
+#include <sys/param.h>
extern int which_main(int argc, char **argv)
{
- char *path_list, *test, *tmp;
- struct dirent *next;
+ char *path_list, *test, *tmp, *path_parsed;
+ char buf[PATH_MAX];
+ struct stat filestat;
+ int count = 0;
- if (**(argv + 1) == '-') {
+ if (argc <= 1 || **(argv + 1) == '-') {
usage("which [COMMAND ...]\n"
#ifndef BB_FEATURE_TRIVIAL_HELP
"\nLocates a COMMAND.\n"
@@ -44,21 +47,45 @@ extern int which_main(int argc, char **argv)
if (!path_list)
path_list = "/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin";
- while(argc-- > 0 && *(argv++) != '\0' && strlen(*argv)) {
- for( test=path_list; (tmp=strchr(test, ':')) && (tmp+1)!=NULL; test=++tmp) {
- DIR *dir;
- *tmp='\0';
- //printf("Checking directory '%s'\n", test);
- dir = opendir(test);
- if (!dir)
- continue;
- while ((next = readdir(dir)) != NULL) {
- //printf("Checking file '%s'\n", next->d_name);
- if ((strcmp(next->d_name, *argv) == 0)) {
- printf("%s/%s\n", test, next->d_name);
- exit(TRUE);
- }
+ path_parsed = malloc (strlen(path_list) + 1);
+ strcpy (path_parsed, path_list);
+
+ /* Replace colons with zeros in path_parsed and count them */
+ count = 1;
+ test = path_parsed;
+ while (1) {
+ tmp = strchr(test, ':');
+ if (tmp == NULL)
+ break;
+ *tmp = 0;
+ test = tmp + 1;
+ count++;
+ }
+
+
+ while(argc-- > 0) {
+ int i;
+ int found = FALSE;
+ test = path_parsed;
+ argv++;
+ for (i = 0; i < count; i++) {
+ strcpy (buf, test);
+ strcat (buf, "/");
+ strcat (buf, *argv);
+ if (stat (buf, &filestat) == 0
+ && filestat.st_mode & S_IXUSR)
+ {
+ found = TRUE;
+ break;
}
+ test += (strlen(test) + 1);
+ }
+ if (found == TRUE)
+ printf ("%s\n", buf);
+ else
+ {
+ printf ("which: no %s in (%s)\n", *argv, path_list);
+ exit (FALSE);
}
}
exit(TRUE);