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FreeBSD 11.0 - man page for properties_read (freebsd section 3)

PROPERTIES(3)						   BSD Library Functions Manual 					     PROPERTIES(3)

properties_read, property_find, properties_free -- functions to allow creating simple property lists from ASCII file data
System Utilities Library (libutil, -lutil)
#include <libutil.h> properties properties_read(int fd); char * property_find(properties list, const char *name); void properties_free(properties list);
typedef struct _properties { struct _properties *next; char *name; char *value; } *properties; The function properties_read() reads name = value pairs from the file descriptor passed in fd and returns the head of a new property list, assuming that the file's contents have been parsed properly, or NULL in case of error. The property_find() function returns the associated value string for the property named name if found, otherwise NULL. The value returned may be up to PROPERTY_MAX_VALUE bytes in length. The properties_free() function is used to free the structure returned by properties_read() when it is no longer needed.
Each property in the file is assumed to have the format of name = value where name is an alphanumeric string (and any punctuation not includ- ing the `=' character) and value is an arbitrary string of text terminated by a newline character. If newlines are desired, the entire value should be enclosed in { } (curly-bracket) characters. Any line beginning with a # or ; character is assumed to be a comment and will be ignored.
Jordan Hubbard
October 7, 1998 BSD

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