libpayload: Add strerror
Change-Id: I33d45ad7d09473b8c6f5b7ee5fbadc0d184f9dcd Signed-off-by: Stefan Tauner <stefan.tauner@gmx.at> Reviewed-on: http://review.coreboot.org/3537 Tested-by: build bot (Jenkins) Reviewed-by: Nico Huber <nico.huber@secunet.com>
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@ -63,8 +63,9 @@ char *strstr(const char *h, const char *n);
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char *strsep(char **stringp, const char *delim);
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size_t strspn(const char *s, const char *a);
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size_t strcspn(const char *s, const char *a);
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char* strtok(char *str, const char *delim);
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char* strtok_r(char *str, const char *delim, char **ptr);
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char *strtok(char *str, const char *delim);
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char *strtok_r(char *str, const char *delim, char **ptr);
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char *strerror(int errnum);
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/** @} */
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/**
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@ -639,3 +639,17 @@ void perror(const char *s)
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{
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printf("%s: %d\n", s?s:"(none)", errno);
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}
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/**
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* Get a message string describing the given error number.
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*
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* @param errnum The error number to be interpreted
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* @return A pointer to a string describing the given error number
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*/
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char *strerror(int errnum)
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{
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/* Reserve enough space for the string below + INT64_MIN in decimal + \0 */
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static char errstr[35];
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snprintf(errstr, sizeof(errstr), "Unknown error %d", errnum);
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return errstr;
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}
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