diff options
Diffstat (limited to 'gunzip.c')
| -rw-r--r-- | gunzip.c | 28 |
1 files changed, 22 insertions, 6 deletions
@@ -3,6 +3,9 @@ */ #include "internal.h" +#define bb_need_name_too_long +#define BB_DECLARE_EXTERN +#include "messages.c" static const char gunzip_usage[] = "gunzip [OPTION]... FILE\n\n" @@ -64,6 +67,7 @@ static char *license_msg[] = { #include <signal.h> #include <sys/stat.h> #include <errno.h> +#include <sys/param.h> /* for PATH_MAX */ /* #include "tailor.h" */ @@ -627,8 +631,12 @@ typedef RETSIGTYPE (*sig_type) OF((int)); #endif #define RW_USER (S_IRUSR | S_IWUSR) /* creation mode for open() */ -#ifndef MAX_PATH_LEN -# define MAX_PATH_LEN 1024 /* max pathname length */ +#ifndef MAX_PATH_LEN /* max pathname length */ +# ifdef PATH_MAX +# define MAX_PATH_LEN PATH_MAX +# else +# define MAX_PATH_LEN 1024 +# endif #endif #ifndef SEEK_END @@ -696,8 +704,8 @@ int gunzip_main (int argc, char** argv) int delInputFile=0; struct stat statBuf; char* delFileName; - char ifname[MAX_PATH_LEN]; /* input file name */ - char ofname[MAX_PATH_LEN]; /* output file name */ + char ifname[MAX_PATH_LEN + 1]; /* input file name */ + char ofname[MAX_PATH_LEN + 1]; /* output file name */ if (argc==1) usage(gunzip_usage); @@ -764,7 +772,11 @@ int gunzip_main (int argc, char** argv) /* Open up the input file */ if (*argv=='\0') usage(gunzip_usage); - strncpy(ifname, *argv, MAX_PATH_LEN); + if (strlen(*argv) > MAX_PATH_LEN) { + fprintf(stderr, name_too_long, "gunzip"); + do_exit(WARNING); + } + strcpy(ifname, *argv); /* Open input fille */ inFileNum=open( ifname, O_RDONLY); @@ -799,7 +811,11 @@ int gunzip_main (int argc, char** argv) char* pos; /* And get to work */ - strncpy(ofname, ifname, MAX_PATH_LEN-4); + if (strlen(ifname) > MAX_PATH_LEN - 4) { + fprintf(stderr, name_too_long, "gunzip"); + do_exit(WARNING); + } + strcpy(ofname, ifname); pos=strstr(ofname, ".gz"); if (pos != NULL) { *pos='\0'; |