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Member "dosfstools-2.11/dosfsck/common.c" of archive dosfstools-2.11.src.tar.gz:

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    1 /* common.c  -  Common functions */
    2 
    3 /* Written 1993 by Werner Almesberger */
    4 
    5 /* FAT32, VFAT, Atari format support, and various fixes additions May 1998
    6  * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
    7 
    8 
    9 #include <stdlib.h>
   10 #include <stdio.h>
   11 #include <string.h>
   12 #include <stdarg.h>
   13 #include <errno.h>
   14 
   15 #include "common.h"
   16 
   17 
   18 typedef struct _link {
   19     void *data;
   20     struct _link *next;
   21 } LINK;
   22 
   23 
   24 void die(char *msg,...)
   25 {
   26     va_list args;
   27 
   28     va_start(args,msg);
   29     vfprintf(stderr,msg,args);
   30     va_end(args);
   31     fprintf(stderr,"\n");
   32     exit(1);
   33 }
   34 
   35 
   36 void pdie(char *msg,...)
   37 {
   38     va_list args;
   39 
   40     va_start(args,msg);
   41     vfprintf(stderr,msg,args);
   42     va_end(args);
   43     fprintf(stderr,":%s\n",strerror(errno));
   44     exit(1);
   45 }
   46 
   47 
   48 void *alloc(int size)
   49 {
   50     void *this;
   51 
   52     if ((this = malloc(size))) return this;
   53     pdie("malloc");
   54     return NULL; /* for GCC */
   55 }
   56 
   57 
   58 void *qalloc(void **root,int size)
   59 {
   60     LINK *link;
   61 
   62     link = alloc(sizeof(LINK));
   63     link->next = *root;
   64     *root = link;
   65     return link->data = alloc(size);
   66 }
   67 
   68 
   69 void qfree(void **root)
   70 {
   71     LINK *this;
   72 
   73     while (*root) {
   74 	this = (LINK *) *root;
   75 	*root = this->next;
   76 	free(this->data);
   77 	free(this);
   78     }
   79 }
   80 
   81 
   82 int min(int a,int b)
   83 {
   84     return a < b ? a : b;
   85 }
   86 
   87 
   88 char get_key(char *valid,char *prompt)
   89 {
   90     int ch,okay;
   91 
   92     while (1) {
   93 	if (prompt) printf("%s ",prompt);
   94 	fflush(stdout);
   95 	while (ch = getchar(), ch == ' ' || ch == '\t');
   96 	if (ch == EOF) exit(1);
   97 	if (!strchr(valid,okay = ch)) okay = 0;
   98 	while (ch = getchar(), ch != '\n' && ch != EOF);
   99 	if (ch == EOF) exit(1);
  100 	if (okay) return okay;
  101 	printf("Invalid input.\n");
  102     }
  103 }
  104 
  105 /* Local Variables: */
  106 /* tab-width: 8     */
  107 /* End:             */