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which.c
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which.c
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// source from: http://stackoverflow.com/a/3454538
#include <io.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
char *extensions[] = { "com", "exe", "bat", "cmd", NULL };
int is_exe(char *ext) {
int i;
for ( i = 0; extensions[i]; i++)
if ( 0 == stricmp(ext, extensions[i] ) )
return 1;
return 0;
}
void print_path(char *buffer) {
time_t t;
time(&t);
srand((unsigned int)t);
switch (rand() % 6) {
case 0: printf("\n\n | | |__| | / ` |__|\n |/\\| | | | \\__, | |\n\n\n%s\n\n", buffer);break;
case 1: printf("\n\n \\ / |_ o _ |_ \n \\/\\/ | | | (_ | |\n\n\n%s\n\n", buffer);break;
case 2: printf("\n\n _ _ _ _ \n ( ) _ ( )( ) _ ( )\n | | ( ) | || |__ (_) ___ | |__\n | | | | | || _ `\\| | /'___)| _ `\\\n | (_/ \\_) || | | || |( (___ | | | |\n `\\___x___/'(_) (_)(_)`\\____)(_) (_)\n\n\n%s\n\n", buffer);break;
case 3: printf("\n\n .__ .__ .__ \n__ _ _| |__ |__| ____ | |__\n\\ \\/ \\/ / | \\| |/ ___\\| | \\\n \\ /| Y \\ \\ \\___| Y \\\n \\/\\_/ |___| /__|\\___ >___| /\n \\/ \\/ \\/\n\n\n%s\n\n", buffer);break;
case 4: printf("\n\n __ ___ _ _ \n \\ \\ / / | (_) | |\n \\ \\ /\\ / /| |__ _ ___| |__ \n \\ \\/ \\/ / | '_ \\| |/ __| '_ \\ \n \\ /\\ / | | | | | (__| | | |\n \\/ \\/ |_| |_|_|\\___|_| |_|\n\n\n%s\n\n", buffer);break;
case 5: printf("\n\n _ _ _ _ _ \n| | | | | (_) | |\n| | | | |__ _ ___| |__\n| |/\\| | '_ \\| |/ __| '_ \\ \n\\ /\\ / | | | | (__| | | |\n \\/ \\/|_| |_|_|\\___|_| |_|\n\n\n%s\n\n", buffer);break;
}
}
int main(int argc, char **argv) {
char path[FILENAME_MAX];
char buffer[FILENAME_MAX];
char *path_var;
char *ext;
char *dir;
int i;
if (argc != 2) {
fprintf(stderr, "Usage: which <filename>\n");
return 1;
}
/* First try to find file name as-is.
*/
if ( 0 == access(argv[1], 0)) {
print_path(argv[1]);
return 0;
}
/* Okay, it wasn't found. See if it had an extension, and if not, try
* adding the usual ones...
*/
ext = strrchr(argv[1], '.' );
if ( 0 == ext++ || !is_exe(ext) ) {
for ( i = 0; extensions[i]; i++) {
sprintf(buffer, "%s.%s", argv[1], extensions[i]);
if ( 0 == access(buffer, 0)) {
print_path(buffer);
return 0;
}
}
if ( NULL == (path_var=getenv("PATH")))
return 1;
dir = strtok(path_var, ";");
do {
for ( i = 0; extensions[i]; i++) {
sprintf(buffer, "%s\\%s.%s", dir, argv[1], extensions[i]);
if ( 0 == access( buffer, 0)) {
print_path(buffer);
return 0;
}
}
} while ( NULL != ( dir = strtok(NULL, ";")));
}
else {
if ( NULL == (path_var=getenv("PATH")))
return 1;
dir = strtok(path_var, ";");
do {
sprintf(buffer, "%s\\%s", dir, argv[1]);
if ( 0 == access( buffer, 0)) {
print_path(buffer);
return 0;
}
} while ( NULL != ( dir = strtok(NULL, ";")));
}
return 1;
}