Last change
on this file since 872 was 821, checked in by Bruno Cornec, 18 years ago |
Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)
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File size:
691 bytes
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Rev | Line | |
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[821] | 1 | /*
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| 2 | * xreadlink.c - safe implementation of readlink.
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| 3 | * Returns a NULL on failure...
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| 4 | */
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| 5 |
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| 6 | #include <stdio.h>
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| 7 |
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| 8 | /*
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| 9 | * NOTE: This function returns a malloced char* that you will have to free
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| 10 | * yourself. You have been warned.
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| 11 | */
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| 12 |
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| 13 | #include <unistd.h>
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| 14 | #include "libbb.h"
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| 15 |
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| 16 | char *xreadlink(const char *path)
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| 17 | {
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| 18 | enum { GROWBY = 80 }; /* how large we will grow strings by */
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| 19 |
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| 20 | char *buf = NULL;
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| 21 | int bufsize = 0, readsize = 0;
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| 22 |
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| 23 | do {
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| 24 | buf = xrealloc(buf, bufsize += GROWBY);
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| 25 | readsize = readlink(path, buf, bufsize); /* 1st try */
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| 26 | if (readsize == -1) {
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| 27 | bb_perror_msg("%s", path);
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| 28 | free(buf);
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| 29 | return NULL;
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| 30 | }
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| 31 | }
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| 32 | while (bufsize < readsize + 1);
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| 33 |
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| 34 | buf[readsize] = '\0';
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| 35 |
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| 36 | return buf;
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| 37 | }
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