diff options
Diffstat (limited to 'libbb/xfuncs.c')
| -rw-r--r-- | libbb/xfuncs.c | 30 |
1 files changed, 19 insertions, 11 deletions
diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c index 773e718..ade6395 100644 --- a/libbb/xfuncs.c +++ b/libbb/xfuncs.c @@ -57,7 +57,7 @@ char * xstrdup(const char *s) if (s == NULL) return NULL; - t = strdup (s); + t = strdup(s); if (t == NULL) bb_error_msg_and_die(bb_msg_memory_exhausted); @@ -69,23 +69,33 @@ char * xstrdup(const char *s) // the (possibly truncated to length n) string into it. char * xstrndup(const char *s, int n) { + int m; char *t; if (ENABLE_DEBUG && s == NULL) bb_error_msg_and_die("xstrndup bug"); - /* TODO: think about xstrndup("abc", 10000)!!! */ - t = xmalloc(++n); + /* We can just xmalloc(n+1) and strncpy into it, */ + /* but think about xstrndup("abc", 10000) wastage! */ + m = n; + t = (char*) s; + while (m) { + if (!*t) break; + m--; t++; + } + n = n - m; + t = xmalloc(n + 1); + t[n] = '\0'; - return safe_strncpy(t,s,n); + return memcpy(t,s,n); } // Die if we can't open a file and return a FILE * to it. // Notice we haven't got xfread(), This is for use with fscanf() and friends. FILE *xfopen(const char *path, const char *mode) { - FILE *fp; - if ((fp = fopen(path, mode)) == NULL) + FILE *fp = fopen(path, mode); + if (fp == NULL) bb_perror_msg_and_die("%s", path); return fp; } @@ -93,8 +103,8 @@ FILE *xfopen(const char *path, const char *mode) // Die if we can't open an existing file and return an fd. int xopen(const char *pathname, int flags) { - if (ENABLE_DEBUG && (flags & O_CREAT)) - bb_error_msg_and_die("xopen() with O_CREAT"); + //if (ENABLE_DEBUG && (flags & O_CREAT)) + // bb_error_msg_and_die("xopen() with O_CREAT"); return xopen3(pathname, flags, 0666); } @@ -142,7 +152,7 @@ off_t xlseek(int fd, off_t offset, int whence) return off; } -// Die with supplied error message if this FILE * has ferror set. +// Die with supplied filename if this FILE * has ferror set. void die_if_ferror(FILE *fp, const char *fn) { if (ferror(fp)) { @@ -214,7 +224,6 @@ void xsetenv(const char *key, const char *value) bb_error_msg_and_die(bb_msg_memory_exhausted); } - // Converts unsigned long long value into compact 4-char // representation. Examples: "1234", "1.2k", " 27M", "123T" // Fifth char is always '\0' @@ -257,7 +266,6 @@ void smart_ulltoa5(unsigned long long ul, char buf[5]) buf[4] = '\0'; } - // Convert unsigned integer to ascii, writing into supplied buffer. A // truncated result is always null terminated (unless buflen is 0), and // contains the first few digits of the result ala strncpy. |