ELF_STRPTR(3ELF) ELF Library Functions ELF_STRPTR(3ELF)

NAME

elf_strptr - make a string pointer

SYNOPSIS

cc [ flag ... ] file ... -lelf [ library ... ]
#include <libelf.h>

char *elf_strptr(Elf *elf, size_t section, size_t offset);

DESCRIPTION

The elf_strptr() function converts a string section offset to a
string pointer. elf identifies the file in which the string section
resides, and section identifies the section table index for the
strings. elf_strptr() normally returns a pointer to a string, but it
returns a null pointer when elf is null, section is invalid or is not
a section of type SHT_STRTAB, the section data cannot be obtained,
offset is invalid, or an error occurs.

EXAMPLES

Example 1: A sample program of calling elf_strptr() function.

A prototype for retrieving section names appears below. The file
header specifies the section name string table in the e_shstrndx
member. The following code loops through the sections, printing their
names.


/* handle the error */
if ((ehdr = elf32_getehdr(elf)) == 0) {
return;
}
ndx = ehdr->e_shstrndx;
scn = 0;
while ((scn = elf_nextscn(elf, scn)) != 0) {
char *name = 0;
if ((shdr = elf32_getshdr(scn)) != 0)
name = elf_strptr(elf, ndx, (size_t)shdr->sh_name);
printf("'%s'\n", name? name: "(null)");
}

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Stable |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+

SEE ALSO

elf(3ELF), elf32_getshdr(3ELF), elf32_xlatetof(3ELF),
elf_getdata(3ELF), libelf(3LIB), attributes(7)

NOTES

A program may call elf_getdata() to retrieve an entire string table
section. For some applications, that would be both more efficient and
more convenient than using elf_strptr().

July 11, 2001 ELF_STRPTR(3ELF)