1 /* Included and modified strings.c from the OpenBSD project */
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33 #include <sys/types.h>
43 #include <netinet/in.h>
46 #include <sys/exechdr.h>
47 #elif defined Darwin || defined HPUX
49 /* For some reason darwin does not have that */
51 unsigned long a_info; /* Use macros N_MAGIC, etc for access */
52 unsigned char a_machtype; /* machine type */
53 unsigned short a_magic; /* magic number */
54 unsigned a_text; /* length of text, in bytes */
55 unsigned a_data; /* length of data, in bytes */
56 unsigned a_bss; /* length of uninitialized data area for file, in bytes */
57 unsigned a_syms; /* length of symbol table data in file, in bytes */
58 unsigned a_entry; /* start address */
59 unsigned a_trsize; /* length of relocation info for text, in bytes */
60 unsigned a_drsize; /* length of relocation info for data, in bytes */
63 #define OMAGIC 0407 /* Object file or impure executable */
64 #define NMAGIC 0410 /* Code indicating pure executable */
65 #define ZMAGIC 0413 /* Code indicating demand-paged executable */
66 #define BMAGIC 0415 /* Used by a b.out object */
74 #define PAGSIZ 0x02000
78 #define OLD_PAGSIZ 0x00800
85 (((x).magic)!=U802TOCMAGIC && ((x).magic)!=U803TOCMAGIC && ((x).magic)!=U803XTOCMAGIC && ((x).magic)!=U64_TOCMAGIC)
88 (((x).a_magic)!=OMAGIC && ((x).a_magic)!=NMAGIC && ((x).a_magic)!=ZMAGIC)
95 ((x).a_machtype == M_OLDSUN2? OLD_PAGSIZ : PAGSIZ)
101 #define N_TXTOFF(x) \
103 ((x).magic==U64_TOCMAGIC ? 0 : sizeof (struct aouthdr))
105 #define N_TXTOFF(x) \
107 ((x).a_machtype == M_OLDSUN2 \
108 ? ((x).a_magic==ZMAGIC ? N_PAGSIZ(x) : sizeof (struct exec)) \
109 : ((x).a_magic==ZMAGIC ? 0 : sizeof (struct exec)) )
112 #endif /* N_TXTOFF */
114 #include "headers/defs.h"
115 #include "headers/debug_op.h"
116 #include "headers/regex_op.h"
118 #include "error_messages/error_messages.h"
120 #define STR_MINLEN 4 /* Minimum length for a string */
122 #define ISSTR(ch) (isascii(ch) && (isprint(ch) || ch == '\t'))
125 typedef struct aouthdr EXEC;
127 typedef struct exec EXEC;
130 typedef struct _os_strings {
135 unsigned char hbfr[sizeof(EXEC)];
139 /* Read each character from a binary file */
140 int os_getch(os_strings *oss);
143 /* List the strings of a binary and check if the regex given is there */
144 int os_string(char *file, char *regex)
149 char line[OS_SIZE_1024 + 1];
154 /* Return didn't match */
155 if (!file || !regex) {
159 /* Allocate the buffer */
160 bfr = (unsigned char *) calloc(STR_MINLEN + 2, sizeof(unsigned char));
162 merror(MEM_ERROR, ARGV0, errno, strerror(errno));
167 oss.fp = fopen(file, "r");
174 memset(line, '\0', OS_SIZE_1024 + 1);
176 /* Start (from old strings.c) */
180 head = (EXEC *)oss.hbfr;
182 if ((oss.head_len = read(fileno(oss.fp), head, sizeof(EXEC))) == -1) {
185 } else if (oss.head_len == sizeof(EXEC) && !N_BADMAG(*head)) {
186 oss.foff = N_TXTOFF(*head);
187 if (fseek(stdin, oss.foff, SEEK_SET) == -1) {
191 oss.read_len = head->tsize + head->dsize;
193 oss.read_len = head->a_text + head->a_data;
202 /* Read the file and perform the regex comparison */
203 for (cnt = 0, C = bfr; (ch = os_getch(&oss)) != EOF;) {
209 if (++cnt < STR_MINLEN) {
213 strncpy(line, (char *)bfr, STR_MINLEN + 1);
217 while ((ch = os_getch(&oss)) != EOF && ISSTR(ch)) {
218 if (cnt < OS_SIZE_1024) {
230 if (OS_PRegex(line, regex)) {
249 /* Get next character from wherever */
250 int os_getch(os_strings *oss)
254 if (oss->hcnt < oss->head_len) {
255 return ((int)oss->hbfr[oss->hcnt++]);
259 if (oss->read_len == -1 || oss->read_len-- > 0) {
260 return (fgetc(oss->fp));
266 int os_string(__attribute__((unused)) char *file, __attribute__((unused)) char *regex)