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/*
* Shell-like utility functions
*
* Copyright 2004, Broadcom Corporation
* All Rights Reserved.
*
* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
*
* $Id$
*/
#ifndef _shutils_h_
#define _shutils_h_
#include <string.h>
/*
* Reads file and returns contents
* @param fd file descriptor
* @return contents of file or NULL if an error occurred
*/
extern char * fd2str(int fd);
/*
* Reads file and returns contents
* @param path path to file
* @return contents of file or NULL if an error occurred
*/
extern char * file2str(const char *path);
/*
* Waits for a file descriptor to become available for reading or unblocked signal
* @param fd file descriptor
* @param timeout seconds to wait before timing out or 0 for no timeout
* @return 1 if descriptor changed status or 0 if timed out or -1 on error
*/
extern int waitfor(int fd, int timeout);
/*
* Concatenates NULL-terminated list of arguments into a single
* commmand and executes it
* @param argv argument list
* @param path NULL, ">output", or ">>output"
* @param timeout seconds to wait before timing out or 0 for no timeout
* @param ppid NULL to wait for child termination or pointer to pid
* @return return value of executed command or errno
*/
extern int _eval(char *const argv[], char *path, int timeout, pid_t *ppid);
/*
* Concatenates NULL-terminated list of arguments into a single
* commmand and executes it
* @param argv argument list
* @return stdout of executed command or NULL if an error occurred
*/
extern char * _backtick(char *const argv[]);
/*
* Kills process whose PID is stored in plaintext in pidfile
* @param pidfile PID file
* @return 0 on success and errno on failure
*/
extern int kill_pidfile(char *pidfile);
/*
* fread() with automatic retry on syscall interrupt
* @param ptr location to store to
* @param size size of each element of data
* @param nmemb number of elements
* @param stream file stream
* @return number of items successfully read
*/
extern int safe_fread(void *ptr, size_t size, size_t nmemb, FILE *stream);
/*
* fwrite() with automatic retry on syscall interrupt
* @param ptr location to read from
* @param size size of each element of data
* @param nmemb number of elements
* @param stream file stream
* @return number of items successfully written
*/
extern int safe_fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream);
/*
* Convert Ethernet address string representation to binary data
* @param a string in xx:xx:xx:xx:xx:xx notation
* @param e binary data
* @return TRUE if conversion was successful and FALSE otherwise
*/
extern int ether_atoe(const char *a, unsigned char *e);
/*
* Convert Ethernet address binary data to string representation
* @param e binary data
* @param a string in xx:xx:xx:xx:xx:xx notation
* @return a
*/
extern char * ether_etoa(const unsigned char *e, char *a);
/*
* Concatenate two strings together into a caller supplied buffer
* @param s1 first string
* @param s2 second string
* @param buf buffer large enough to hold both strings
* @return buf
*/
static inline char * strcat_r(const char *s1, const char *s2, char *buf)
{
strcpy(buf, s1);
strcat(buf, s2);
return buf;
}
/* Check for a blank character; that is, a space or a tab */
#define isblank(c) ((c) == ' ' || (c) == '\t')
/* Strip trailing CR/NL from string <s> */
#define chomp(s) ({ \
char *c = (s) + strlen((s)) - 1; \
while ((c > (s)) && (*c == '\n' || *c == '\r' || *c == ' ')) \
*c-- = '\0'; \
s; \
})
/* Simple version of _backtick() */
#define backtick(cmd, args...) ({ \
char *argv[] = { cmd, ## args, NULL }; \
_backtick(argv); \
})
/* Simple version of _eval() (no timeout and wait for child termination) */
#define eval(cmd, args...) ({ \
char *argv[] = { cmd, ## args, NULL }; \
_eval(argv, ">/dev/console", 0, NULL); \
})
/* Copy each token in wordlist delimited by space into word */
#define foreach(word, wordlist, next) \
for (next = &wordlist[strspn(wordlist, " ")], \
strncpy(word, next, sizeof(word)), \
word[strcspn(word, " ")] = '\0', \
word[sizeof(word) - 1] = '\0', \
next = strchr(next, ' '); \
strlen(word); \
next = next ? &next[strspn(next, " ")] : "", \
strncpy(word, next, sizeof(word)), \
word[strcspn(word, " ")] = '\0', \
word[sizeof(word) - 1] = '\0', \
next = strchr(next, ' '))
/* Return NUL instead of NULL if undefined */
#define safe_getenv(s) (getenv(s) ? : "")
/* Print directly to the console */
#define cprintf(fmt, args...) do { \
FILE *fp = fopen("/dev/console", "w"); \
if (fp) { \
fprintf(fp, fmt, ## args); \
fclose(fp); \
} \
} while (0)
/* Debug print */
#ifdef DEBUG
#define dprintf(fmt, args...) cprintf("%s: " fmt, __FUNCTION__, ## args)
#else
#define dprintf(fmt, args...)
#endif
#ifdef vxworks
#include <inetLib.h>
#define inet_aton(a, n) ((inet_aton((a), (n)) == ERROR) ? 0 : 1)
#define inet_ntoa(n) ({ char a[INET_ADDR_LEN]; inet_ntoa_b ((n), a); a; })
#include <typedefs.h>
#include <bcmutils.h>
#define ether_atoe(a, e) bcm_ether_atoe((a), (e))
#define ether_etoa(e, a) bcm_ether_ntoa((e), (a))
/* These declarations are not available where you would expect them */
extern int vsnprintf (char *, size_t, const char *, va_list);
extern int snprintf(char *str, size_t count, const char *fmt, ...);
extern char *strdup(const char *);
extern char *strsep(char **stringp, char *delim);
extern int strcasecmp(const char *s1, const char *s2);
extern int strncasecmp(const char *s1, const char *s2, size_t n);
/* Neither are socket() and connect() */
#include <sockLib.h>
#ifdef DEBUG
#undef dprintf
#define dprintf printf
#endif
#endif
#endif /* _shutils_h_ */
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