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misc.c - dedup - deduplicating backup program |
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git clone git://bitreich.org/dedup/ git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/dedup/ (git://bitreich.org) |
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LICENSE |
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--- |
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misc.c (1064B) |
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--- |
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1 #include <sys/types.h> |
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2 |
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3 #include <stdarg.h> |
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4 #include <stdio.h> |
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5 #include <stdlib.h> |
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6 #include <unistd.h> |
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7 |
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8 #define NERRBUF 128 |
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9 static char errbuf[NERRBUF]; |
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10 |
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11 ssize_t |
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12 xread(int fd, void *buf, size_t nbytes) |
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13 { |
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14 unsigned char *bp = buf; |
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15 ssize_t total = 0; |
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16 |
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17 while (nbytes > 0) { |
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18 ssize_t n; |
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19 |
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20 n = read(fd, &bp[total], nbytes); |
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21 if (n < 0) |
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22 return -1; |
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23 else if (n == 0) |
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24 return total; |
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25 total += n; |
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26 nbytes -= n; |
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27 } |
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28 return total; |
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29 } |
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30 |
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31 ssize_t |
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32 xwrite(int fd, void *buf, size_t nbytes) |
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33 { |
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34 unsigned char *bp = buf; |
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35 ssize_t total = 0; |
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36 |
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37 while (nbytes > 0) { |
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38 ssize_t n; |
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39 |
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40 n = write(fd, &bp[total], nbytes); |
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41 if (n < 0) |
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42 return -1; |
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43 else if (n == 0) |
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44 return total; |
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45 total += n; |
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46 nbytes -= n; |
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47 } |
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48 return total; |
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49 } |
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50 |
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51 void |
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52 seterr(char *fmt, ...) |
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53 { |
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54 va_list ap; |
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55 |
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56 va_start(ap, fmt); |
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57 vsnprintf(errbuf, NERRBUF, fmt, ap); |
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58 va_end(ap); |
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59 } |
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60 |
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61 void |
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62 printerr(char *fmt, ...) |
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63 { |
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64 va_list ap; |
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65 |
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66 va_start(ap, fmt); |
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67 vfprintf(stderr, fmt, ap); |
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68 if (errbuf[0] == '\0') |
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69 fprintf(stderr, ": unknown error\n"); |
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70 else |
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71 fprintf(stderr, ": %s\n", errbuf); |
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72 va_end(ap); |
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73 exit(1); |
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74 } |
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