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| ELF Library Functions | elf_strptr(3ELF) |
| | elf_strptr - make a string pointer |
SYNOPSIS
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cc [ flag ... ] file ... -lelf [ library ... ]
#include <libelf.h> char *elf_strptr(Elf *elf, size_t section, size_t offset); |
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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.
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| | Example 1. A sample program of calling elf_strptr function.
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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.
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/* 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)");
}
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See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Interface Stability | Stable |
| MT-Level | MT-Safe |
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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().
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