Difference between revisions of "ProvaPratica 2013.02.15"
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(Created page with "Esercizio 1 del 2013.02.15 <syntaxhighlight lang="C"> /* * Prova Pratica di Lab SO 2013.02.15 * http://www.cs.unibo.it/~renzo/so/pratiche/2013.02.15.pdf * Es.1 * Eduardo S...") |
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| Line 2: | Line 2: | ||
<syntaxhighlight lang="C"> | <syntaxhighlight lang="C"> | ||
/* | /* | ||
| − | * Prova Pratica di Lab SO 2013.02.15 | + | * Prova Pratica di Lab SO 2013.02.15 |
| − | * http://www.cs.unibo.it/~renzo/so/pratiche/2013.02.15.pdf | + | * http://www.cs.unibo.it/~renzo/so/pratiche/2013.02.15.pdf |
| − | * Es.1 | + | * Es.1 |
| − | * Eduardo Santarelli | + | * Eduardo Santarelli |
*/ | */ | ||
#include <stdio.h> | #include <stdio.h> | ||
| Line 14: | Line 14: | ||
#include <stdlib.h> | #include <stdlib.h> | ||
| − | /* Selector function, called by scandir. Only selects | + | /* Selector function, called by scandir. Only selects |
| − | * palindrome file names. Discards implied directories. | + | * palindrome file names. Discards implied directories. |
*/ | */ | ||
int dir_is_pal(const struct dirent* dir){ | int dir_is_pal(const struct dirent* dir){ | ||
int i,j; | int i,j; | ||
| − | + | //discard implied dirs | |
| − | + | if(dir->d_name[0]=='.' && strlen(dir->d_name)<3) | |
| − | + | return 0; | |
for(i=0, j=strlen(dir->d_name)-1; i<j; i++, j--) | for(i=0, j=strlen(dir->d_name)-1; i<j; i++, j--) | ||
| Line 32: | Line 32: | ||
int main(int argc, char** argv){ | int main(int argc, char** argv){ | ||
| − | + | struct dirent** entry; | |
| − | + | int i, items; | |
| − | + | pid_t pid; | |
| − | + | items=scandir("./", &entry, dir_is_pal, alphasort); | |
| − | + | for(i=0; i<items; i++){ | |
| − | + | int status; | |
| − | + | if((pid=fork())) ; //do nothing | |
| − | + | else | |
| − | + | execl(entry[i]->d_name, entry[i]->d_name, (char*)0); | |
| − | + | } | |
| − | + | return EXIT_SUCCESS; | |
} | } | ||
</syntaxhighlight> | </syntaxhighlight> | ||
-Eduardo | -Eduardo | ||
Revision as of 03:20, 12 December 2013
Esercizio 1 del 2013.02.15
/*
* Prova Pratica di Lab SO 2013.02.15
* http://www.cs.unibo.it/~renzo/so/pratiche/2013.02.15.pdf
* Es.1
* Eduardo Santarelli
*/
#include <stdio.h>
#include <errno.h>
#include <dirent.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
/* Selector function, called by scandir. Only selects
* palindrome file names. Discards implied directories.
*/
int dir_is_pal(const struct dirent* dir){
int i,j;
//discard implied dirs
if(dir->d_name[0]=='.' && strlen(dir->d_name)<3)
return 0;
for(i=0, j=strlen(dir->d_name)-1; i<j; i++, j--)
if(dir->d_name[i]!=dir->d_name[j])
return 0;
return 1;
}
int main(int argc, char** argv){
struct dirent** entry;
int i, items;
pid_t pid;
items=scandir("./", &entry, dir_is_pal, alphasort);
for(i=0; i<items; i++){
int status;
if((pid=fork())) ; //do nothing
else
execl(entry[i]->d_name, entry[i]->d_name, (char*)0);
}
return EXIT_SUCCESS;
}
-Eduardo