author | Deepak Modgil <Deepak.Modgil@Nokia.com> |
Fri, 03 Apr 2009 17:12:41 +0100 | |
changeset 0 | 0e6d23e2b466 |
permissions | -rw-r--r-- |
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/******************************************************************************* |
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* Copyright (c) 2003, 2008 IBM Corporation and others. |
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* All rights reserved. This program and the accompanying materials |
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* are made available under the terms of the Eclipse Public License v1.0 |
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* which accompanies this distribution, and is available at |
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* http://www.eclipse.org/legal/epl-v10.html |
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* |
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* Contributors: |
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* IBM Corporation - initial API and implementation |
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*******************************************************************************/ |
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/* |
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* pfind.c - Search for a binary in $PATH. |
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*/ |
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#include <stdio.h> |
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#include <unistd.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <limits.h> |
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#ifndef PATH_MAX |
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#define PATH_MAX 1024 |
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#endif |
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char * pfind(const char *name) |
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{ |
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char *tok; |
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char *sp; |
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char *path; |
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char fullpath[PATH_MAX+1]; |
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/* Sanity check. */ |
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if (name == NULL) { |
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fprintf(stderr, "pfind(): Null argument.\n"); |
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return NULL; |
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} |
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/* For absolute name or name with a path, check if it is an executable. */ |
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if (name[0] == '/' || name[0] == '.') { |
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if (access(name, X_OK | R_OK) == 0) { |
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return strdup(name); |
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} |
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return NULL; |
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} |
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/* Search in the PATH environment. */ |
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path = getenv("PATH" ); |
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if (path == NULL || strlen(path) <= 0) { |
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fprintf(stderr, "Unable to get $PATH.\n"); |
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return NULL; |
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} |
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/* The value return by getenv() is readonly */ |
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path = strdup(path); |
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tok = strtok_r(path, ":", &sp); |
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while (tok != NULL) { |
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snprintf(fullpath, sizeof(fullpath) - 1, "%s/%s", tok, name); |
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if (access(fullpath, X_OK | R_OK) == 0) { |
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free(path); |
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return strdup(fullpath); |
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} |
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tok = strtok_r( NULL, ":", &sp ); |
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} |
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free(path); |
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return NULL; |
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} |
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#ifdef BUILD_WITH_MAIN |
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int main(int argc, char **argv) |
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{ |
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int i; |
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char *fullpath; |
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|
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for (i=1; i<argc; i++) { |
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fullpath = pfind(argv[i]); |
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if (fullpath == NULL) |
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printf("Unable to find %s in $PATH.\n", argv[i]); |
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else |
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printf("Found %s @ %s.\n", argv[i], fullpath); |
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} |
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} |
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#endif |