diff options
Diffstat (limited to 'libbb/interface.c')
| -rw-r--r-- | libbb/interface.c | 51 |
1 files changed, 28 insertions, 23 deletions
diff --git a/libbb/interface.c b/libbb/interface.c index f3655b0..4632e29 100644 --- a/libbb/interface.c +++ b/libbb/interface.c @@ -15,7 +15,7 @@ * that either displays or sets the characteristics of * one or more of the system's networking interfaces. * - * Version: $Id: interface.c,v 1.23 2004/07/23 01:49:46 bug1 Exp $ + * Version: $Id: interface.c,v 1.24 2004/08/12 16:52:00 andersen Exp $ * * Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org> * and others. Copyright 1993 MicroWalt Corporation @@ -986,31 +986,36 @@ static int if_readconf(void) return err; } -static char *get_name(char *name, char *p) +char *get_name(char *name, char *p) { - while (isspace(*p)) - p++; - while (*p) { - if (isspace(*p)) - break; - if (*p == ':') { /* could be an alias */ - char *dot = p, *dotname = name; - - *name++ = *p++; - while (isdigit(*p)) - *name++ = *p++; - if (*p != ':') { /* it wasn't, backup */ - p = dot; - name = dotname; - } - if (*p == '\0') - return NULL; - p++; - break; + /* Extract <name>[:<alias>] from nul-terminated p where p matches + <name>[:<alias>]: after leading whitespace. + If match is not made, set name empty and return unchanged p */ + int namestart=0, nameend=0, aliasend; + while (isspace(p[namestart])) + namestart++; + nameend=namestart; + while (p[nameend] && p[nameend]!=':' && !isspace(p[nameend])) + nameend++; + if (p[nameend]==':') { + aliasend=nameend+1; + while (p[aliasend] && isdigit(p[aliasend])) + aliasend++; + if (p[aliasend]==':') { + nameend=aliasend; } - *name++ = *p++; + if ((nameend-namestart)<IFNAMSIZ) { + memcpy(name,&p[namestart],nameend-namestart); + name[nameend-namestart]='\0'; + p=&p[nameend]; + } else { + /* Interface name too large */ + name[0]='\0'; + } + } else { + /* first ':' not found - return empty */ + name[0]='\0'; } - *name++ = '\0'; return p; } |