source: trunk/appswitch/main.c @ 85

Last change on this file since 85 was 85, checked in by Nicholas Riley, 17 years ago

Initial import.

File size: 7.9 KB
Line 
1/*
2 appswitch - a command-line application switcher
3 Nicholas Riley <appswitch@sabi.net>
4
5 Copyright (c) 2003, Nicholas Riley
6 All rights reserved.
7
8 Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
9
10 * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
11 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
12 * Neither the name of this software nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
13
14 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
15
16*/
17
18#define DEBUG 0
19
20#include <unistd.h>
21#include "CPS.h"
22
23const char *APP_NAME;
24
25#define VERSION "1.0d1"
26
27struct {
28    OSType creator;
29    CFStringRef bundleID;
30    char *name;
31    pid_t pid;
32    char *path;
33    enum {
34        MATCH_UNKNOWN, MATCH_CREATOR, MATCH_BUNDLE_ID, MATCH_NAME, MATCH_PID, MATCH_PATH
35    } matchType;
36} OPTS =
37{
38    kLSUnknownCreator, NULL, NULL, -1, NULL, MATCH_UNKNOWN
39};
40
41typedef struct {
42    OSStatus status;
43    const char *desc;
44} errRec, errList[];
45
46static errList ERRS = {
47    // Process Manager errors
48    { appIsDaemon, "application is background-only\n", },
49    { procNotFound, "unable to connect to system service.\nAre you logged in?" },
50    // CoreGraphics errors
51    { kCGErrorIllegalArgument, "window server error.\nAre you logged in?" },
52    { fnfErr, "file not found" },
53    { 0, NULL }
54};
55
56void usage() {
57    fprintf(stderr, "usage: %s [-c creator] [-i bundleID] [-a name] [-p pid] [path]\n"
58            "  -c creator    match application by four-character creator code ('ToyS')\n"
59            "  -i bundle ID  match application by bundle identifier (com.apple.scripteditor)\n"
60            "  -p pid        match application by process identifier [slower]\n"
61            "  -a name       match application by name\n", APP_NAME);
62    fprintf(stderr, "appswitch "VERSION" (c) 2003 Nicholas Riley <http://web.sabi.net/nriley/software/>.\n"
63            "Please send bugs, suggestions, etc. to <appswitch@sabi.net>.\n");
64
65    exit(1);
66}
67
68char *osstatusstr(OSStatus err) {
69    errRec *rec;
70    const char *errDesc = "unknown error";
71    char * const failedStr = "(unable to retrieve error message)";
72    static char *str = NULL;
73    size_t len;
74    if (str != NULL && str != failedStr) free(str);
75    for (rec = &(ERRS[0]) ; rec->status != 0 ; rec++)
76        if (rec->status == err) {
77            errDesc = rec->desc;
78            break;
79        }
80            len = strlen(errDesc) + 10 * sizeof(char);
81    str = (char *)malloc(len);
82    if (str != NULL)
83        snprintf(str, len, "%s (%ld)", errDesc, err);
84    else
85        str = failedStr;
86    return str;
87}
88
89void osstatusexit(OSStatus err, const char *fmt, ...) {
90    va_list ap;
91    const char *errDesc = osstatusstr(err);
92    va_start(ap, fmt);
93    fprintf(stderr, "%s: ", APP_NAME);
94    vfprintf(stderr, fmt, ap);
95    fprintf(stderr, ": %s\n", errDesc);
96    exit(1);
97}
98
99void errexit(const char *fmt, ...) {
100    va_list ap;
101    va_start(ap, fmt);
102    fprintf(stderr, "%s: ", APP_NAME);
103    vfprintf(stderr, fmt, ap);
104    fprintf(stderr, "\n");
105    exit(1);
106}
107
108void getargs(int argc, char * const argv[]) {
109    extern char *optarg;
110    extern int optind;
111    int ch;
112
113    if (argc == 1) usage();
114
115    const char *opts = "c:i:p:a:";
116   
117    ch = getopt(argc, argv, opts);
118
119    switch (ch) {
120        case 'p':
121            if (sscanf(optarg, "%d", &OPTS.pid) != 1 || OPTS.pid < 0)
122                errexit("invalid process identifier (argument of -p)");
123            OPTS.matchType = MATCH_PID;
124            break;
125        case 'c':
126            if (strlen(optarg) != 4) errexit("creator (argument of -c) must be four characters long");
127            OPTS.creator = *(OSTypePtr)optarg;
128            OPTS.matchType = MATCH_CREATOR;
129            break;
130        case 'i':
131            OPTS.bundleID = CFStringCreateWithCString(NULL, optarg, CFStringGetSystemEncoding());
132            OPTS.matchType = MATCH_BUNDLE_ID;
133            break;
134        case 'a':
135            OPTS.name = strdup(optarg);
136            OPTS.matchType = MATCH_NAME;
137            break;
138        case -1:
139            break;
140        default: usage();
141    }
142
143    if (getopt(argc, argv, opts) != -1)
144        errexit("choose only one of -c, -i, -u, -p, -a options");
145
146    argc -= optind;
147    argv += optind;
148
149    if (OPTS.matchType != MATCH_UNKNOWN && argc != 0) usage();
150
151    if (OPTS.matchType == MATCH_UNKNOWN) {
152        if (argc != 1) usage();
153        OPTS.path = argv[0];
154        OPTS.matchType = MATCH_PATH;
155    }
156}
157
158int main (int argc, char * const argv[]) {
159    OSStatus err;
160
161    APP_NAME = argv[0];
162    getargs(argc, argv);
163   
164    long pathMaxLength = pathconf("/", _PC_PATH_MAX);
165    long nameMaxLength = pathconf("/", _PC_NAME_MAX);
166
167    char *path = (char *)malloc(pathMaxLength);
168    char *name = (char *)malloc(nameMaxLength);;
169
170    if (path == NULL || name == NULL) errexit("can't allocate memory for path or filename buffer");
171
172    // need to establish connection with window server
173    InitCursor();
174   
175    CPSProcessSerNum psn = {
176        kNoProcess, kNoProcess
177    };
178    CPSProcessInfoRec info;
179    int len;
180    while ( (err = CPSGetNextProcess(&psn)) == noErr) {
181        err = CPSGetProcessInfo(&psn, &info, path, pathMaxLength, &len, name, nameMaxLength);
182        if (err != noErr) osstatusexit(err, "can't get information for process PSN %ld.%ld", psn.hi, psn.lo);
183
184#if DEBUG
185        fprintf(stderr, "%ld.%ld: %s : %s\n", psn.hi, psn.lo, name, path);
186#endif
187       
188        switch (OPTS.matchType) {
189            case MATCH_UNKNOWN:
190                break;
191            case MATCH_CREATOR: if (OPTS.creator != info.ExecFileCreator) continue;
192                break;
193            case MATCH_NAME: if (strcmp(name, OPTS.name) != 0) continue;
194                break;
195            case MATCH_PID: if (OPTS.pid != info.UnixPID) continue;
196                break;
197            case MATCH_PATH: if (strcmp(path, OPTS.path) != 0) continue;
198                break;
199            case MATCH_BUNDLE_ID:
200            {
201                CFURLRef url = CFURLCreateFromFileSystemRepresentation(NULL, path, strlen(path), false);
202                if (url == NULL) errexit("can't get bundle location for process '%s' (PSN %ld.%ld, pid %d)", name, psn.hi, psn.lo, info.UnixPID);
203                CFBundleRef bundle = CFBundleCreate(NULL, url);
204                if (bundle != NULL) {
205                    CFStringRef bundleID = CFBundleGetIdentifier(bundle);
206#if DEBUG
207                    CFShow(bundleID);
208#endif
209                    if (bundleID != NULL && CFStringCompare(OPTS.bundleID, bundleID, kCFCompareCaseInsensitive) == kCFCompareEqualTo)
210                        break;
211                }
212                CFRelease(url);
213                continue;
214            }
215            default:
216                errexit("unknown match type");
217        }
218        err = CPSSetFrontProcess(&psn);
219        if (err != noErr) osstatusexit(err, "can't set front process");
220        exit(0);
221    }
222    if (err != procNotFound) osstatusexit(err, "can't get next process");
223
224    errexit("can't find matching process");
225    return 0;
226}
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